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•	enhances investors' understanding of the General Partner and the Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

•	eliminates duplicative disclosure and provides a more streamlined and readable presentation of information since a substantial portion of the Company's disclosure applies to both the General Partner and the Partnership; and

•	creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.

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•	Changes in general economic and business conditions, including the financial condition of our tenants and the value of our real estate assets;

•	The General Partner's continued qualification as a REIT for U.S. federal income tax purposes;

•	Heightened competition for tenants and potential decreases in property occupancy;

•	Potential changes in the financial markets and interest rates;

•	Volatility in the General Partner's stock price and trading volume;

•	Our continuing ability to raise funds on favorable terms, or at all;

•	Our ability to successfully identify, acquire, develop and/or manage properties on terms that are favorable to us;

•	Potential increases in real estate construction costs;

•	Our ability to successfully dispose of properties on terms that are favorable to us, including, without limitation, through one or more transactions that are consistent with our previously disclosed strategic plans;

•	Our ability to successfully integrate our acquired properties;

•	Our ability to retain our current credit ratings;

•	Inherent risks in the real estate business, including, but not limited to, tenant defaults, potential liability relating to environmental matters and liquidity of real estate investments; and

•	Other risks and uncertainties described herein, as well as those risks and uncertainties discussed from time to time in our other reports and other public filings with the Securities and Exchange Commission ("SEC").

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•	Effective January 1, 2018, the federal corporate income tax rate will be permanently reduced to 21%.

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Effective January 1, 2018, individuals are entitled to a 20% deduction for certain business-related income from pass-through entities, such as partnerships and limited liability companies and for ordinary REIT dividends. The 2017 Tax Act also adjusts the income tax brackets for individuals. The top federal income tax rate is reduced to 37%, and various deductions are eliminated or limited. The combination of a top rate of 37% and a 20% deduction for ordinary REIT dividends reduces the top federal income tax rate on ordinary REIT dividends to 29.6%. Most of the changes applicable to individuals are temporary and apply only to taxable years beginning after December 31, 2017 and before January 1, 2026.

•	For taxable years beginning after 2017, Section 1031 like kind exchanges will be ended for all assets other than real estate.

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For taxable years beginning after December 31, 2017, the deductibility of business interest expense is generally limited to 30% of a taxpayer's adjusted taxable income, which is taxable business income, excluding business interest income and expense, net operating losses ("NOLs"), the 20% deduction for certain business income and, for taxable years beginning before January 1, 2022, depreciation and amortization. This limitation does not apply to an "electing real property trade or business." Taxpayers that elect out of the interest expense limitations must apply less favorable depreciation rules for real property.

•	NOLs arising in taxable years beginning after December 31, 2017 may offset only 80% of taxable income. Any NOLs generated in tax years ending after 2017 will no longer be eligible for carryback but will be eligible for indefinite carryforward.

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•	We could become engaged in a dispute with any of our joint venture partners that might affect our ability to develop or operate a property;

•	Our joint venture partners may have different objectives than we have regarding the appropriate timing and terms of any sale or refinancing of properties;

•	Our joint venture partners may have competing interests in our markets that could create conflict of interest issues; and

•	Maturities of debt encumbering our jointly owned investments may not be able to be refinanced at all or on terms that are as favorable as the current terms.

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•	Changes in the general economic climate;

•	The availability of capital on favorable terms, or at all;

•	Increases in interest rates;

•	Local conditions such as oversupply of property or a reduction in demand;

•	Competition for tenants;

•	Changes in market rental rates;

•	Delay or inability to collect rent from tenants who are bankrupt, insolvent or otherwise unwilling or unable to pay;

•	Difficulty in leasing or re-leasing space quickly or on favorable terms;

•	Costs associated with periodically renovating, repairing and reletting rental space;

•	Our ability to provide adequate maintenance and insurance on our properties;

•	Our ability to control variable operating costs;

•	Changes in government regulations; and

•	Potential liability under, and changes in, environmental, zoning, tax and other laws.

•	Unsuccessful development opportunities could result in direct expenses to us;

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•	Construction costs of a project may exceed original estimates, possibly making the project less profitable than originally estimated, or possibly unprofitable;

•	Time required to complete the construction of a project or to lease up the completed project may be greater than originally anticipated, thereby adversely affecting our cash flow and liquidity;

•	Occupancy rates and rents of a completed project may not be sufficient to make the project profitable; and

•	Favorable sources to fund our development activities may not be available.

•	Prices paid for acquired facilities are based upon a series of market judgments; and

•	Costs of any improvements required to bring an acquired facility up to standards to establish the market position intended for that facility might exceed budgeted costs.

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•	liabilities for clean-up of undisclosed environmental contamination;

•	claims by tenants, vendors or other persons against the former owners of the properties;

•	liabilities incurred in the ordinary course of business; and

•	claims for indemnification by general partners, directors, officers and others indemnified by the former owners of the properties.

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•	The General Partner would not be allowed a deduction for dividends distributed to shareholders and would be subject to federal corporate income tax (and any applicable state and local income taxes) on its taxable income at regular corporate income tax rates;

•	Unless the General Partner was entitled to relief under certain statutory provisions, it would be disqualified from treatment as a REIT for the four taxable years following the year during which it ceased to qualify as a REIT;

•	The General Partner's net earnings available for investment or distribution to its shareholders would decrease due to the additional tax liability for the year or years involved; and

•	The General Partner would no longer be required to make any distributions to shareholders in order to qualify as a REIT.

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•	The holders of 80% of the General Partner's outstanding shares of capital stock approve the transaction;

•	The transaction has been approved by three-fourths of those directors who served on the General Partner's board before the shareholder became a 10% owner; or

•	The significant shareholder complies with the "fair price" provisions of the General Partner's charter.

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•	Any voluntary sale, exchange, merger, consolidation or other disposition of all or substantially all of the assets of the Partnership in one or more transactions other than a disposition occurring upon a financing or refinancing of the Partnership;

•	The General Partner's merger, consolidation or other business combination with another entity unless after the transaction substantially all of the assets of the surviving entity are contributed to the Partnership in exchange for Common Units;

•	The General Partner's assignment of its interests in the Partnership other than to one of its wholly owned subsidiaries; and

•	Any reclassification or recapitalization or change of outstanding shares of the General Partner's common stock other than certain changes in par value, stock splits, stock dividends or combinations.

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(1)	Represents the average annual base rental payments, on a straight-line basis for the term of each lease, from space leased to tenants as of December 31, 2017, excluding additional amounts paid by tenants as reimbursement for operating expenses. Joint venture properties are shown at 100% of square feet and net effective rents, without regard to our ownership percentage.

(2)	Annual net effective rent per leased square foot.

(3)	Represents properties not located in our primary markets.

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Owned or jointly controlled 509 primarily industrial properties, of which 493 properties with 139.6 million square feet were in service and 16 properties with 9.2 million square feet were under development. The 493 in-service properties were comprised of 451 consolidated properties with 128.4 million square feet and 42 jointly controlled unconsolidated properties with 11.2 million square feet. The 16 properties under development consisted of 12 consolidated properties with 7.2 million square feet and four jointly controlled unconsolidated properties with 2.0 million square feet.

•	Owned directly, or through ownership interests in unconsolidated joint ventures (with acreage not adjusted for our percentage ownership interest), approximately 1,900 acres of land and controlled approximately 1,600 acres through purchase options.

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•	We generated $2.52 billion of total net cash proceeds from the disposition of 98 consolidated buildings and 166 acres of wholly owned undeveloped land.

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We started new development projects with expected total costs of $866.2 million, which included $124.6 million of expected total costs for six development projects started within unconsolidated joint ventures. The development projects started in 2017 were mostly comprised of new industrial projects and were, in aggregate, 60.0% pre-leased. Included in these totals is one medical office property which was sold as part of the Medical Office Portfolio Disposition.

•	We placed 23 newly completed wholly owned development projects in service, which totaled 9.2 million square feet with total costs of $638.7 million. These properties were 85.9% leased at December 31, 2017.

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The total estimated cost of our consolidated properties under construction at December 31, 2017 totaled $642.1 million, with $374.9 million of such costs already incurred. The total estimated cost for jointly controlled properties under construction was $99.7 million at December 31, 2017, with $65.3 million of costs already incurred. The consolidated properties under construction are 56% pre-leased, while the jointly controlled properties under construction are 67% pre-leased.

•	Same-property net operating income, on a cash basis, as defined hereafter under "Supplemental Performance Measures", increased by 4.0% for the twelve months ended December 31, 2017, as compared to the same period in 2016.

•	As the result of speculative developments that were placed in service during the year, the percentage of total square feet leased for our in-service portfolio of consolidated properties decreased from 97.2% at December 31, 2016 to 96.1% at December 31, 2017.

•	Total leasing activity for our consolidated properties totaled 21.4 million square feet in 2017 compared to 26.2 million square feet in 2016. The decrease in total leasing activity in 2017 was largely the result of a lower number of leases up for renewal in 2017, compared to 2016, as well as the timing of build-to-suit development projects.

•	Total leasing activity for our consolidated properties in 2017 included 9.6 million square feet of renewals, which represented an 82.5% retention rate on a square foot basis, and resulted in a 17.4% increase in net effective rents, as defined hereafter under "Key Performance Indicators."

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•	During 2017, we repaid eight fixed rate secured loans, totaling $66.5 million, which had a weighted average stated interest rate of 5.85%.

•	In June 2017, we repaid our $250.0 million variable rate term loan, which had a scheduled maturity date of January 2019 and bore interest at LIBOR plus 1.00%.

•	In June 2017, we also repaid $285.6 million of senior unsecured notes that had a stated interest rate of 6.50% and an effective interest rate of 6.08%, with a scheduled maturity date of January 2018. We recognized a loss of $9.0 million including a repayment premium and the write-off of unamortized deferred financing costs.

•	In July 2017, we repaid $128.7 million of senior unsecured notes that had both a stated and an effective interest rate of 6.75% with a scheduled maturity date of March 2020. We recognized a loss of $16.6 million including a repayment premium and the write-off of unamortized deferred financing costs.

•	In October 2017, we extended our $1.2 billion unsecured revolving credit facility from January 2019 to January 2022 at a variable rate (subject to adjustment) of LIBOR plus 0.875%.

•	In December 2017, we issued $300.0 million senior unsecured notes that bear interest at a stated interest rate of 3.38%, have an effective interest rate of 3.39% and mature on December 15, 2027.

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•	The acquisition of 43 properties and placing of 38 developments in service from January 1, 2016 to December 31, 2017 provided combined incremental revenues of $66.0 million in the year ended December 31, 2017 when compared to 2016.

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Rental and related revenue from continuing operations includes lease termination fees, which relate to specific tenants who pay a fee to terminate their lease obligation before the end of the contractual lease term. The overall increase in rental and related revenue from continuing operations included an increase of $9.3 million in termination fees during the year ended December 31, 2017 when compared to 2016.

•	Increases to average commencement occupancy and rental rates in our same-property portfolio.

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The above items contributing to the increase to rental and related revenue from continuing operations were partially offset by the sale of 45 in-service properties since January 1, 2016, which did not meet the criteria for inclusion within discontinued operations, and resulted in a $36.0 million decrease in rental and related revenue from continuing operations in the year ended December 31, 2017 when compared to 2016.

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•	The sale of 123 properties since January 1, 2015, which did not meet the criteria for inclusion within discontinued operations, resulted in a $65.2 million decrease in rental and related revenue from continuing operations in the year ended December 31, 2016 when compared to 2015.

•	The acquisition of 18 properties and placing of 34 developments in service from January 1, 2015 to December 31, 2016 provided combined incremental revenues from continuing operations of $32.0 million in the year ended December 31, 2016 when compared to 2015.

•	Average commencement occupancy in the same-property portfolio increased by 1.2% in the year ended December 31, 2016 when compared to 2015.

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The value allocable to the above or below market component of an acquired in-place lease is determined based upon the present value (using a discount rate which reflects the risks associated with the acquired leases) of the difference between (i) the contractual amounts to be received pursuant to the lease over its remaining term and (ii) management's estimate of the amounts that would be received using fair market rates over the remaining term of the lease. The amounts allocated to above market leases are included in deferred leasing and other costs in the balance sheet and below market leases are included in other liabilities in the balance sheet; both are amortized to rental income over the remaining terms of the respective leases.

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Factors considered in determining the value allocable to in-place leases include estimates, during hypothetical lease up periods, related to space that is actually leased at the time of acquisition. These estimates include (i) lost rent at market rates, (ii) fixed operating costs that will be recovered from tenants and (iii) theoretical leasing commissions required to execute similar leases. These intangible assets are included in deferred leasing and other costs in the balance sheet and are amortized over the remaining term of the existing lease.

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•	property investment;

•	leasing/capital costs;

•	dividends and distributions to shareholders and unitholders;

•	long-term debt maturities;

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•	opportunistic repurchases of outstanding debt; and

•	other contractual obligations.

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•	Real estate development costs were $549.6 million, $401.4 million, and $370.5 million during 2017, 2016, and 2015, respectively.

•	We paid cash of $1.23 billion, $269.8 million and $68.7 million, respectively, for real estate and undeveloped land acquisitions during 2017, 2016 and 2015, respectively.

•	Sales of land and depreciated property generated net proceeds of $2.52 billion, $538.6 million and $1.68 billion during 2017, 2016 and 2015, respectively.

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•	Second generation tenant improvements, leasing costs and building improvements totaled $52.6 million, $59.3 million and $61.9 million during 2017, 2016 and 2015, respectively. The second generation capital expenditures continued to decrease in 2017 primarily due to the dispositions of office properties that generally have higher re-leasing costs than industrial properties do.

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The cash outflow reflected in the Other Assets line of the Consolidated Statements of Cash Flows for 2017 was the result of a portion of the proceeds from the Medical Office Portfolio Disposition being immediately transferred into escrow, which did not meet the requirements for presentation as cash and cash equivalents, for use in completing future like kind exchange transactions. The cash outflows from such transfers totaled $73.8 million during 2017, compared to $8.6 million during 2016 and $31.5 million during 2015. A cash inflow of $200.0 million, related to the repayment of a mortgage note from the buyers of an office portfolio that we sold in 2015, is reflected in Other Assets line of the Consolidated Statements of Cash Flows for 2016.

•	We received capital distributions from unconsolidated joint ventures, either as the result of selling our ownership interests in certain unconsolidated joint ventures or from our share of the proceeds from property sales from unconsolidated joint ventures, of $125.0 million, $126.1 million and $69.0 million during 2017, 2016 and 2015, respectively.

•	We made capital contributions and advances to unconsolidated joint ventures in the amounts of $10.3 million, $57.9 million and $72.4 million during 2017, 2016 and 2015, respectively.

•	During 2017, the General Partner did not issue any shares of common stock pursuant to its ATM equity program, compared to 8.4 million shares of common stock for net proceeds of $215.6 million in 2016 and 233,000 shares of common stock for net proceeds of $4.5 million in 2015.

•	In 2017, we issued $300.0 million of senior unsecured notes and in 2016 we issued $375.0 million of senior unsecured notes. We did not issue any senior unsecured notes in 2015.

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During 2017, the Partnership paid cash of $689.6 million to execute the repayment of a $250.0 million variable rate term loan, which was prepayable without penalty, and the early redemption of $414.3 million of senior unsecured notes. During 2016, we repurchased or redeemed $404.5 million of unsecured notes, for cash payments totaling $437.6 million. During 2015, we repaid six unsecured notes, totaling $831.2 million, for cash payments totaling $910.9 million.

•	During 2017, the Partnership repaid eight secured loans for $66.5 million. During 2016, we repaid seven secured loans, totaling $346.7 million. During 2015, we repaid 17 secured loans for cash payments totaling $231.2 million, which included early repayment premiums of $4.2 million for certain of the loans that were repaid prior to their scheduled maturity dates.

•	We decreased net borrowings on the Partnership's line of credit by $48.0 million in 2017, decreased net borrowings by $23.0 million in 2016 and decreased net borrowings by $35.0 million in 2015.

•	We paid regular cash dividends or distributions of $0.77, $0.73 and $0.69 per common share or per Common Unit in each of the years ended December 31, 2017, 2016 and 2015, respectively.

•	We paid special dividends of $0.85 and $0.20 per common share or Common Unit during the fourth quarters of 2017 and 2015, respectively. These special dividends were paid in order to maintain our compliance with the requirements for maintaining our status as a REIT and were triggered by significant taxable gains on asset sales completed in 2017 and 2015.

•	Changes in book overdrafts are classified as financing activities within our consolidated Statements of Cash Flows. Book overdrafts were $36.3 million, $13.4 million and $11.1 million at December 31, 2017, 2016 and 2015, respectively.

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(1)	Our long-term debt consists of both secured and unsecured debt and includes both principal and interest. Interest expense for variable rate debt was calculated using the interest rate at December 31, 2017.

(2)	Represents fees on our unsecured line of credit, which has a contractual maturity date in January 2022, with two six-month extension options, which we may exercise at our discretion.

(3)	Our share of unconsolidated joint venture debt includes both principal and interest. Interest expense for variable rate debt was calculated using the interest rate at December 31, 2017.

(4)	Represents estimated remaining costs on the completion of owned development projects and third-party construction projects.

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(a)	The following documents are filed as part of this Annual Report:

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(b)	Exhibits

(c)	Financial Statement Schedule

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•	Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of assets of the company;

•	Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and

•	Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company's assets that could have a material effect on the financial statements.

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•	Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of assets of the Partnership;

•	Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the General Partner; and

•	Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Partnership's assets that could have a material effect on the financial statements.

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(1)	The Company

(2)	Summary of Significant Accounting Policies

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(3)	Acquisitions and Dispositions

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(4)	Related Party Transactions

(5)	Investments in Unconsolidated Joint Ventures

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(6)	Real Estate Assets, Discontinued Operations, Assets Held for Sale and Impairments

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(7)	Indebtedness

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•	In June 2017, we repaid our $250.0 million variable rate term loan, which had a scheduled maturity date of January 2019 and bore interest at LIBOR plus 1.00%, and recognized a loss of $523,000 from the write-off of unamortized deferred financing costs.

•	In June 2017, we also repaid $285.6 million of senior unsecured notes that had a stated interest rate of 6.50% and an effective interest rate of 6.08%, with a scheduled maturity date of January 2018. We recognized a loss of $9.0 million including a repayment premium and the write-off of unamortized deferred financing costs.

•	In July 2017, we repaid $128.7 million of senior unsecured notes that had both a stated and an effective interest rate of 6.75% with a scheduled maturity date of March 2020. We recognized a loss of $16.6 million including a repayment premium and the write-off of unamortized deferred financing costs.

•	In December 2017, we issued $300.0 million senior unsecured notes that bear interest at a stated interest rate of 3.38%, have an effective interest rate of 3.39% and mature on December 15, 2027.

•	In June 2016, we issued $375.0 million of unsecured notes that bear interest at a stated interest rate of 3.25%, have an effective interest rate of 3.36%, and mature on June 30, 2026.

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During June and July 2016 we repaid $275.0 million of our 5.95% senior unsecured notes, which had a scheduled maturity of February 2017, through the combination of a tender offer and the subsequent redemption of the remaining notes that were not tendered, for cash payments totaling $283.5 million. Together, the tender offer and the redemption resulted in an $8.8 million loss on debt extinguishment, which primarily consisted of premiums paid to the noteholders and the write-off of unamortized deferred financing costs.

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In October 2016, we redeemed $129.5 million of unsecured notes, which had a scheduled maturity in August 2019, for a cash payment of $154.1 million. These notes had a stated rate of 8.25% and an effective rate of 8.38%. We recognized a net loss on the extinguishment of these notes in the fourth quarter totaling $25.2 million, which was comprised of a make-whole payment to the noteholders as well as the write-off of unamortized deferred financing costs.

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(8)	Segment Reporting

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(9)	Leasing Activity

(10)	Employee Benefit Plans

(11)	Shareholders' Equity of the General Partner and Partners' Capital of the Partnership

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(12)	Stock Based Compensation

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(13)	Financial Instruments

(14)	Commitments and Contingencies

(15)	Selected Interim Financial Information (unaudited)

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(16)	Subsequent Events

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(1)	The tax basis (in thousands) of our real estate assets at December 31, 2017 was approximately $6,365,637 (unaudited) for federal income tax purposes.

(2)	Depreciation of real estate is computed using the straight-line method over 40 years for buildings and 15 years for land improvements for properties that we develop, 30 years for buildings and 10 years for land improvements for properties that we acquire, and shorter periods based on lease terms (generally 3 to 10 years) for tenant improvements.

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