LXP Industrial Trust (LXP) 10-K 20 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 18, 2020	Jun. 28, 2019
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period Ended Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-12386
Entity Registrant Name	LEXINGTON REALTY TRUST
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	13-3717318
Entity Address, Address Line One	One Penn Plaza
Entity Address, Address Line Two	Suite 4015
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10119-4015
City Area Code	212
Local Phone Number	692-7200
Entity Well-known Seasoned User	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,160,905,597
Entity Common Stock, Shares Outstanding (in shares)		254,941,588
Documents Incorporated by Reference	Certain information contained in the Definitive Proxy Statement for Lexington Realty Trust's Annual Meeting of Shareholders, to be held on May 19, 2020, is incorporated by reference in this Annual Report on Form 10-K in response to Part III, Items 10, 11, 12, 13 and 14, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.
Entity Central Index Key	0000910108
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Shares of beneficial interest, par value $0.0001 per share, classified as Common Stock
Trading Symbol	LXP
Security Exchange Name	NYSE
Series C
Document Information [Line Items]
Title of 12(b) Security	6.50% Series C Cumulative Convertible Preferred Stock, par value $0.0001 per share
Trading Symbol	LXPPRC
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Real estate, at cost	$ 3,320,574	$ 3,090,134
Real estate - intangible assets	409,756	419,612
Investments in real estate under construction	13,313	0
Real estate, gross	3,743,643	3,509,746
Less: accumulated depreciation and amortization	887,629	954,087
Real estate, net	2,856,014	2,555,659
Assets held for sale	0	63,868
Operating right-of-use assets, net	38,133
Cash and cash equivalents	122,666	168,750
Restricted cash	6,644	8,497
Investments in non-consolidated entities	57,168	66,183
Deferred expenses (net of accumulated amortization of $23,382 in 2019 and $27,397 in 2018)	18,404	15,937
Rent receivable - current	3,229	3,475
Rent receivable - deferred	66,294	58,692
Other assets	11,708	12,779
Total assets	3,180,260	2,953,840
Liabilities:
Mortgages and notes payable, net	390,272	570,420
Term loan payable, net	297,439	298,733
Senior notes payable, net	496,870	496,034
Trust preferred securities, net	127,396	127,296
Dividends payable	32,432	48,774
Liabilities held for sale	0	386
Operating lease liabilities	39,442
Accounts payable and other liabilities	29,925	30,790
Accrued interest payable	7,897	4,523
Deferred revenue - including below market leases (net of accumulated accretion of $11,876 in 2019 and $17,606 in 2018)	20,350	20,531
Prepaid rent	13,518	9,675
Total liabilities	1,455,541	1,607,162
Commitments and contingencies
Equity:
Preferred shares, par value $0.0001 per share; authorized 100,000,000 shares, Series C Cumulative Convertible Preferred, liquidation preference $96,770 and 1,935,400 shares issued and outstanding	94,016	94,016
Common shares, par value $0.0001 per share; authorized 400,000,000 shares, 254,770,719 and 235,008,554 shares issued and outstanding in 2019 and 2018, respectively	25	24
Additional paid-in-capital	2,976,670	2,772,855
Accumulated distributions in excess of net income	(1,363,676)	(1,537,100)
Accumulated other comprehensive income (loss)	(1,928)	76
Total shareholders’ equity	1,705,107	1,329,871
Noncontrolling interests	19,612	16,807
Total equity	1,724,719	1,346,678
Total liabilities and equity	$ 3,180,260	$ 2,953,840

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Accumulated amortization on deferred expenses	$ 23,382	$ 27,397
Liabilities:
Accumulated accretion on deferred revenue	$ 11,876	$ 17,606
Equity:
Preferred shares, par value (usd per share)	$ 0.0001	$ 0.0001
Preferred shares, authorized shares (in shares)	100,000,000	100,000,000
Preferred shares, liquidation preference	$ 96,770	$ 96,770
Preferred shares, convertible preferred, shares issued (in shares)	1,935,400	1,935,400
Preferred shares, redeemable preferred, shares outstanding (in shares)	1,935,400	1,935,400
Common shares, par value (usd per share)	$ 0.0001	$ 0.0001
Common shares, authorized shares (in shares)	400,000,000	400,000,000
Common shares, shares issued (in shares)	254,770,719	235,008,554
Common shares, shares outstanding (in shares)	254,770,719	235,008,554

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Gross revenues:
Rental revenue	$ 320,622	$ 395,339	$ 391,641
Other income	5,347	1,632	1,049
Total gross revenues	325,969	396,971	392,690
Expense applicable to revenues:
Depreciation and amortization	(147,594)	(168,191)	(173,968)
General and administrative	(30,785)	(31,662)	(34,158)
Litigation settlement	0	0	(2,050)
Non-operating income	2,262	1,859	9,329
Interest and amortization expense	(65,095)	(79,880)	(77,883)
Debt satisfaction gains (charges), net	(4,517)	(2,596)	6,196
Impairment charges and loan losses	(5,329)	(95,813)	(44,996)
Gains on sales of properties	250,889	252,913	63,428
Income (loss) before provision for income taxes and equity in earnings of non-consolidated entities	283,782	230,926	89,394
Provision for income taxes	(1,379)	(1,728)	(1,917)
Equity in earnings (losses) of non-consolidated entities	2,890	1,708	(848)
Net income	285,293	230,906	86,629
Less net income attributable to noncontrolling interests	(5,383)	(3,491)	(1,046)
Net income attributable to Lexington Realty Trust shareholders	279,910	227,415	85,583
Dividends attributable to preferred shares - Series C	(6,290)	(6,290)	(6,290)
Allocation to participating securities	(395)	(287)	(226)
Net income attributable to common shareholders	$ 273,225	$ 220,838	$ 79,067
Net income attributable to common shareholders - basic (usd per share)	$ 1.15	$ 0.93	$ 0.33
Weighted-average common shares outstanding - basic (in shares)	237,642,048	236,666,375	237,758,408
Net income attributable to common shareholders - diluted (usd per share)	$ 1.15	$ 0.93	$ 0.33
Weighted-average common shares outstanding - diluted (in shares)	237,934,515	240,810,990	241,537,837
Real Estate
Expense applicable to revenues:
Property operating	$ (42,018)	$ (42,675)	$ (49,194)

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parentheticals)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Preferred dividend rate	6.50%	6.50%	6.50%

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 285,293	$ 230,906	$ 86,629
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	(2,004)	(989)	2,098
Other comprehensive income (loss)	(2,004)	(989)	2,098
Comprehensive income	283,289	229,917	88,727
Comprehensive income attributable to noncontrolling interests	(5,383)	(3,491)	(1,046)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 277,906	$ 226,426	$ 87,681

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Preferred Shares	Common Stock	Additional Paid-in-Capital	Accumulated Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2016	$ 1,412,491	$ 94,016	$ 24	$ 2,800,736	$ (1,500,966)	$ (1,033)	$ 19,714
Beginning balance (in shares) at Dec. 31, 2016		1,935,400	238,037,177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of noncontrolling OP units for common shares	0			584			(584)
Redemption of noncontrolling OP units for common shares (in shares)			140,746
Exercise of employee common share options	478			478
Exercise of employee common share options, net (in shares)			151,106
Issuance of common shares and deferred compensation amortization, net	24,673			24,673
Issuance of common shares and deferred compensation amortization, net (in shares)			2,360,052
Acquisition of consolidated joint venture partner's equity interest	(7,951)			(7,951)
Dividends/distributions	(177,583)				(174,341)		(3,242)
Net Income	86,629				85,583		1,046
Other comprehensive income (loss)	2,098					2,098
Balance at end of period at Dec. 31, 2017	1,340,835	$ 94,016	$ 24	2,818,520	(1,589,724)	1,065	16,934
Ending balance (in shares) at Dec. 31, 2017		1,935,400	240,689,081
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of noncontrolling OP units for common shares	0			189			(189)
Redemption of noncontrolling OP units for common shares (in shares)			53,388
Repurchase of common shares	(49,858)			(49,858)
Repurchase of common shares (in shares)			(5,851,252)
Exercise of employee common share options	115			115
Exercise of employee common share options, net (in shares)			16,390
Issuance of common shares and deferred compensation amortization, net	6,520			6,520
Issuance of common shares and deferred compensation amortization, net (in shares)			966,791
Repurchase of common shares to settle tax obligations (in shares)			(271,792)
Repurchase of common shares to settle tax obligations	(2,544)			(2,544)
Forfeiture of employee common shares	(71)			(87)	16
Forfeiture of employee common shares (in shares)			(594,052)
Dividends/distributions	(178,236)				(174,807)		(3,429)
Net Income	230,906				227,415		3,491
Other comprehensive income (loss)	(989)					(989)
Balance at end of period at Dec. 31, 2018	1,346,678	$ 94,016	$ 24	2,772,855	(1,537,100)	76	16,807
Ending balance (in shares) at Dec. 31, 2018		1,935,400	235,008,554
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	867						867
Redemption of noncontrolling OP units for common shares	0			1,655			(1,655)
Redemption of noncontrolling OP units for common shares (in shares)			391,993
Repurchase of common shares	(958)			(958)
Repurchase of common shares (in shares)			(441,581)
Issuance of common shares and deferred compensation amortization, net	209,373		$ 2	209,371
Issuance of common shares and deferred compensation amortization, net (in shares)			20,579,745
Repurchase of common shares to settle tax obligations (in shares)			(712,430)
Repurchase of common shares to settle tax obligations	(5,281)		$ (1)	(5,280)
Forfeiture of employee common shares	15				15
Forfeiture of employee common shares (in shares)			(55,562)
Dividends/distributions	(109,264)				(106,501)		(2,763)
Net Income	285,293				279,910		5,383
Other comprehensive income (loss)	(2,004)					(2,004)
Reallocation of noncontrolling interests				(973)			973
Balance at end of period at Dec. 31, 2019	$ 1,724,719	$ 94,016	$ 25	$ 2,976,670	$ (1,363,676)	$ (1,928)	$ 19,612
Ending balance (in shares) at Dec. 31, 2019		1,935,400	254,770,719

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 285,293	$ 230,906	$ 86,629
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	150,440	172,088	177,561
Gains on sales of properties	(250,889)	(252,913)	(63,428)
Debt satisfaction (gains) charges, net	4,517	2,596	(6,196)
Impairment charges and loan losses	5,329	95,813	44,996
Straight-line rents	(14,264)	(20,207)	(19,568)
Amortization of right of use assets	3,645
Other non-cash (income) expense, net	6,060	(3,060)	8,093
Equity in (earnings) losses of non-consolidated entities	(2,890)	(1,708)	848
Distributions of accumulated earnings from non-consolidated entities	2,571	2,083	403
Unearned contingent acquisition consideration	0	0	(3,922)
Change in accounts payable and other liabilities	(270)	(129)	(1,141)
Change in rent receivable and prepaid rent, net	3,770	(3,942)	2,922
Change in accrued interest payable	3,368	(891)	16
Other adjustments, net	(4,496)	(2,825)	657
Net cash provided by operating activities:	192,184	217,811	227,870
Cash flows from investing activities:
Investment in real estate, including intangible assets	(662,010)	(315,959)	(558,571)
Investment in real estate under construction	(11,332)	0	(83,274)
Capital expenditures	(17,829)	(15,506)	(15,184)
Net proceeds from sale of properties	504,118	898,514	223,853
Net proceeds from sale of non-consolidated investment	0	0	6,127
Principal payments received on loans receivable	0	0	139,042
Investments in non-consolidated entities, net	(8,018)	(10,206)	(9,898)
Distributions from non-consolidated entities in excess of accumulated earnings	17,119	3,330	531
Payments of deferred leasing costs	(8,196)	(4,522)	(6,526)
Change in real estate deposits	(817)	(760)	20,826
Net cash provided by (used in) investing activities	(186,965)	554,891	(283,074)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(122,843)	(175,537)	(172,101)
Principal amortization payments	(24,259)	(29,666)	(30,082)
Principal payments on debt, excluding normal amortization	(89,242)	(14,599)	(50,797)
Proceeds of mortgages and notes payable	0	26,350	45,400
Term loan payments	0	(300,000)	0
Proceeds from term loans	0	0	95,000
Revolving credit facility borrowings	110,000	150,000	270,000
Revolving credit facility payments	(110,000)	(310,000)	(110,000)
Payment of early extinguishment of debt charges	(3,505)	(5)	(1,326)
Payments of deferred financing costs	(5,456)	(690)	(2,124)
Cash distributions to noncontrolling interests	(2,763)	(3,429)	(3,242)
Cash contributions from noncontrolling interests	867	0	0
Redemption of a noncontrolling interest	0	0	7,951
Repurchase of common shares	(3,598)	(47,217)	0
Issuance of common shares, net of costs and repurchases to settle tax obligations	197,643	(2,818)	16,804
Net cash provided by (used in) financing activities	(53,156)	(707,611)	49,581
Change in cash, cash equivalents and restricted cash	(47,937)	65,091	(5,623)
Cash, cash equivalents and restricted cash, at beginning of year	177,247	112,156	117,779
Cash, cash equivalents and restricted cash, at end of year	$ 129,310	$ 177,247	$ 112,156

The Company

The Company	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Lexington Realty Trust (together with its consolidated subsidiaries, except when the context only applies to the parent entity, the “Company”) is a Maryland statutory real estate investment trust (“REIT”) that owns a diversified portfolio of equity investments in single-tenant commercial properties. As of December 31, 2019 , the Company had equity ownership interests in approximately 130 consolidated properties located in 31 states. The properties in which the Company has an interest are primarily net-leased to tenants in various industries. The Company believes it has qualified as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). Accordingly, the Company will not be subject to federal income tax, provided that distributions to its shareholders equal at least the amount of its REIT taxable income as defined under the Code. The Company is permitted to participate in certain activities from which it was previously precluded in order to maintain its qualification as a REIT, so long as these activities are conducted in entities which elect to be treated as taxable REIT subsidiaries (“TRS”) under the Code. As such, the TRS are subject to federal income taxes on the income from these activities. The Company conducts its operations either directly or indirectly through (1) property owner subsidiaries and lender subsidiaries, which are single purpose entities, (2) an operating partnership, Lepercq Corporate Income Fund L.P. (“LCIF”), in which the Company is the sole unit holder of the general partner and the sole unit holder of the limited partner that holds a majority of the limited partner interests, (3) a wholly-owned TRS, Lexington Realty Advisors, Inc. (“LRA”), and (4) investments in joint ventures. References to “OP Units” refer to units of limited partner interests in LCIF. Property owner subsidiaries are landlords under leases for properties in which the Company has an interest and/or borrowers under loan agreements secured by properties in which the Company has an interest and lender subsidiaries are lenders under loan agreements where the Company made an investment in a loan asset, but in all cases are separate and distinct legal entities. Each property owner subsidiary is a separate legal entity that maintains separate books and records. The assets and credit of each property owner subsidiary with a property subject to a mortgage loan are not available to creditors to satisfy the debt and other obligations of any other person, including any other property owner subsidiary or any other affiliate. Consolidated entities that are not property owner subsidiaries do not directly own any of the assets of a property owner subsidiary (or the general partner, member or managing member of such property owner subsidiary), but merely hold partnership, membership or beneficial interest therein, which interests are subordinate to the claims of such property owner subsidiary's (or its general partner's, member's or managing member's) creditors.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation and Consolidation. The Company's consolidated financial statements are prepared on the accrual basis of accounting in accordance with U.S. generally accepted accounting principles (“GAAP”). The financial statements reflect the accounts of the Company and its consolidated subsidiaries. The Company consolidates its wholly-owned subsidiaries, partnerships and joint ventures which it controls (i) through voting rights or similar rights or (ii) by means other than voting rights if the Company is the primary beneficiary of a variable interest entity ("VIE"). Entities which the Company does not control and entities which are VIEs in which the Company is not the primary beneficiary are accounted for under appropriate GAAP. The Company is the primary beneficiary of certain VIEs as it has a controlling financial interest in these entities. LCIF, which is consolidated and in which the Company has an approximate 96% interest, is a VIE. In December 2019, the Company acquired a 90% interest in a joint venture with a developer, which acquired a land parcel in the Atlanta, Georgia market to develop an industrial property. Based upon the facts and circumstances at the formation of the joint venture, the Company determined that the joint venture is a variable interest entity in accordance with the applicable accounting guidance. As a result, the Company used the VIE model under the accounting standard for consolidation in order to determine whether to consolidate the joint venture. Based upon the fact that the Company controls the activities that most significantly impact the performance of the joint venture under the operating and related agreements of the joint venture, the joint venture is consolidated in the Company's financial statements. The assets of each VIE are only available to satisfy such VIE's respective liabilities. As of December 31, 2019 and 2018 , the VIEs' mortgages and notes payable were non-recourse to the Company. Below is a summary of selected financial data of consolidated VIEs for which the Company is the primary beneficiary included in the Consolidated Balance Sheets as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 Real estate, net $ 592,372 $ 509,916 Total assets $ 645,623 $ 607,963 Mortgages and notes payable, net $ 82,978 $ 192,791 Total liabilities $ 101,901 $ 203,322 In addition, the Company acquires, from time to time, properties using a reverse like-kind exchange structure pursuant to Section 1031 of the Internal Revenue Code (a "reverse 1031 exchange") and, as such, the properties are in the possession of an Exchange Accommodation Titleholder ("EAT") until the reverse 1031 exchange is completed. The EAT is classified as a VIE as it is a “thinly capitalized” entity. The Company consolidates the EAT because it is the primary beneficiary as it has the ability to control the activities that most significantly impact the EAT's economic performance and can collapse the reverse 1031 exchange structure at any time. The assets of the EAT primarily consist of leased property (net real estate and intangibles). Earnings Per Share . Basic net income (loss) per share is computed by dividing net income (loss) reduced by preferred dividends and amounts allocated to certain non-vested share-based payment awards, if applicable, by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share amounts are similarly computed but include the effect, when dilutive, of in-the-money common share options and non-vested common shares, OP units and put options of certain convertible securities. Use of Estimates. Management has made a number of significant estimates and assumptions relating to the reporting of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses to prepare these consolidated financial statements in conformity with GAAP. These estimates and assumptions are based on management's best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the economic environment. Management adjusts such estimates when facts and circumstances dictate. The most significant estimates made include the recoverability of accounts receivable, allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed, the determination of VIEs and which entities should be consolidated, the determination of impairment of long-lived assets and equity method investments, valuation of derivative financial instruments, valuation of awards granted under compensation plans, the determination of the incremental borrowing rate for leases where the Company is the lessee and the useful lives of long-lived assets. Actual results could differ materially from those estimates. Revenue Recognition. The Company recognizes lease revenue on a straight-line basis over the term of the lease unless another systematic and rational basis is more representative of the time pattern in which the use benefit is derived from the leased property. Revenue is recognized on a contractual basis for leases with escalations tied to a consumer price index with no floor. Renewal options in leases with rental terms that are lower than those in the primary term are excluded from the calculation of straight-line rent if the renewals are not reasonably assured. If the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. If the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition when possession or control of the space is turned over to the tenant for tenant work to begin. The lease incentive is recorded as a deferred expense and amortized as a reduction of revenue on a straight-line basis over the respective lease term. The Company recognizes lease termination fees as rental revenue in the period received and writes off unamortized lease-related intangible and other lease-related account balances, provided there are no further Company obligations under the lease. Otherwise, such fees and balances are recognized on a straight-line basis over the remaining obligation period with the termination payments being recorded as a component of rent receivable-deferred on the Consolidated Balance Sheets. Acquisition of Real Estate. The fair value of the real estate acquired, which includes the impact of fair value adjustments for assumed mortgage debt related to property acquisitions, is allocated to the acquired tangible assets, consisting of land, building and improvements and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, other value of in-place leases and value of tenant relationships, based in each case on their fair values. Prior to January 1, 2018, acquisition and pursuit costs were expensed as incurred and were included in property operating expense in the accompanying Consolidated Statement of Operations, which were $2,171 for 2017. Effective January 1, 2018, the Company's acquisitions are primarily considered asset acquisitions and acquisition costs are now capitalized. The fair value of the tangible assets of an acquired property (which includes land, building and improvements and fixtures and equipment) is determined by valuing the property as if it were vacant. The “as-if-vacant” value is then allocated to land and building and improvements based on management's determination of relative fair values of these assets. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue during the expected lease-up periods based on current market demand. Management also estimates costs to execute similar leases including leasing commissions. Management generally retains a third party to assist in the allocations. In allocating the fair value of the identified intangible assets and liabilities of an acquired property, above-market and below-market lease values are recorded based on the difference between the current in-place lease rent and management's estimate of current market rents. Below-market lease intangibles are recorded as part of deferred revenue and amortized into rental revenue over the non-cancelable periods and bargain renewal periods of the respective leases. Above-market leases are recorded as part of intangible assets and amortized as a direct charge against rental revenue over the non-cancelable portion of the respective leases. The aggregate value of other acquired intangible assets, consisting of in-place leases and tenant relationship values, is measured by the excess of (1) the purchase price paid for a property over (2) the estimated fair value of the property as if vacant, determined as set forth above. This aggregate value is allocated between in-place lease values and tenant relationship values based on management's evaluation of the specific characteristics of each tenant's lease. The value of in-place leases is amortized to expense over the remaining non-cancelable periods and any bargain renewal periods of the respective leases. The value of tenant relationships is amortized to expense over the applicable lease term plus expected renewal periods. Depreciation is determined by the straight-line method over the remaining estimated economic useful lives of the properties. The Company generally depreciates its real estate assets over periods ranging up to 40 years . Impairment of Real Estate. The Company evaluates the carrying value of all tangible and intangible real estate assets held for investment for possible impairment when an event or change in circumstance has occurred that indicates its carrying value may not be recoverable. The Company considers the strategic decisions regarding the future plans to sell properties and other market factors. The Company regularly updates significant estimates and assumptions including rental rates, capitalization rates and discount rates, which are included in the anticipated future undiscounted cash flows derived from the asset. If such cash flows are less than the asset's carrying value, an impairment charge is recognized to the extent by which the asset's carrying value exceeds its estimated fair value, which may be below the balance of any non-recourse financing. Estimating future cash flows and fair values is highly subjective and such estimates could differ materially from actual results. Investments in Non-Consolidated Entities . The Company accounts for its investments in 50% or less owned entities under the equity method, unless consolidation is required. If the Company's investment in the entity is insignificant and the Company has no influence over the control of the entity then the entity is accounted for under the cost method. Impairment of Equity Method Investments. The Company assesses whether there are indicators that the value of its equity method investments may be impaired. An impairment charge is recognized only if the Company determines that a decline in the value of the investment below its carrying value is other-than-temporary. The assessment of impairment is highly subjective and involves the application of significant assumptions and judgments about the Company's intent and ability to recover its investment given the nature and operations of the underlying investment, including the level of the Company's involvement therein, among other factors. To the extent an impairment is deemed to be other-than-temporary, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment. Fair Value Measurements. The Company follows the guidance in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 820, Fair Value Measurements and Disclosures ("Topic 820"), to determine the fair value of financial and non-financial instruments. Topic 820 defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements. Topic 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: Level 1 - quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities; Level 2 - observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and Level 3 - unobservable inputs, which are used when little or no market data is available. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as considering counterparty credit risk. The Company has formally elected to apply the portfolio exception within Topic 820 with respect to measuring counterparty risk for all of its derivative transactions subject to master netting arrangements. The Company estimates the fair value of its real estate assets, including non-consolidated real estate assets, by using income and market valuation techniques. The Company may estimate fair values using market information such as recent sale contracts (Level 2 inputs) or recent sale offers or discounted cash flow models, which primarily rely on Level 3 inputs. The cash flow models include estimated cash inflows and outflows over a specified holding period. These cash flows may include contractual rental revenues, projected future rental revenues and expenses and forecasted tenant improvements and lease commissions based upon market conditions determined through discussion with local real estate professionals, experience the Company has with its other owned properties in such markets and expectations for growth. Capitalization rates and discount rates utilized in these models are estimated by management based upon rates that management believes to be within a reasonable range of current market rates for the respective properties based upon an analysis of factors such as property and tenant quality, geographical location and local supply and demand observations. To the extent the Company under-estimates forecasted cash outflows (tenant improvements, lease commissions and operating costs) or over-estimates forecasted cash inflows (rental revenue rates), the estimated fair value of its real estate assets could be overstated. Acquisition, Development and Construction Arrangements. The Company evaluates loans receivable where the Company participates in residual profits through loan provisions or other contracts to ascertain whether the Company has the same risks and rewards as an owner or a joint venture partner. Where the Company concludes that such arrangements are more appropriately treated as an investment in real estate, the Company reflects such loan receivable as an equity investment in real estate under construction in the Consolidated Balance Sheets. In these cases, no interest income is recorded on the loan receivable and the Company records capitalized interest during the construction period. In arrangements where the Company engages a developer to construct a property or provide funds to a tenant to develop a property, the Company will capitalize the funds provided to the developer/tenant and internal costs of interest and real estate taxes, if applicable, during the construction period. Properties Held For Sale. Assets and liabilities of properties that meet various held for sale criteria, including whether it is probable that a sale will occur within 12 months, are presented separately in the Consolidated Balance Sheets. The operating results of these properties are reflected as discontinued operations in the Consolidated Statements of Operations only if the sale of these assets represents a strategic shift in operations; if not, the operating results are included in continuing operations. Properties classified as held for sale are carried at the lower of net carrying value or estimated fair value less costs to sell and depreciation and amortization are no longer recognized. Properties that do not meet the held for sale criteria are accounted for as operating properties. Deferred Expenses. Deferred expenses consist primarily of revolving line of credit debt and leasing costs. Debt costs are amortized using the straight-line method, which approximates the interest method, over the terms of the debt instruments and leasing costs are amortized over the term of the related lease. Derivative Financial Instruments . The Company accounts for its interest rate swap agreements in accordance with FASB ASC Topic 815, Derivatives and Hedging ("Topic 815"). In accordance with Topic 815, these agreements are carried on the balance sheet at their respective fair values, as an asset if fair value is positive, or as a liability if fair value is negative. If the interest rate swap is designated as a cash flow hedge, the portion of the interest rate swap's change in fair value is reported as a component of other comprehensive income (loss). Upon entering into hedging transactions, the Company documents the relationship between the interest rate swap agreement and the hedged item. The Company also documents its risk-management policies, including objectives and strategies, as they relate to its hedging activities. The Company assesses, both at inception of a hedge and on an ongoing basis, whether or not the hedge is highly effective. The Company will discontinue hedge accounting on a prospective basis with changes in the estimated fair value reflected in earnings when (1) it is determined that the derivative is no longer effective in offsetting cash flows of a hedged item (including forecasted transactions), (2) it is no longer probable that the forecasted transaction will occur or (3) it is determined that designating the derivative as an interest rate swap is no longer appropriate. The Company does and may continue to utilize interest rate swap and cap agreements to manage interest rate risk, but does not anticipate entering into derivative transactions for speculative trading purposes. Stock Compensation. The Company maintains an equity participation plan. Non-vested share grants generally vest either based upon (1) time, (2) performance and/or (3) market conditions. Options granted under the plan in 2010 vested over a five -year period and expire ten years from the date of grant. Options granted under the plan in 2008 vested upon attainment of certain market performance measures and expired ten years from the date of grant. All share-based payments to employees, including grants of employee stock options, are recognized in the Consolidated Statements of Operations based on their fair values. The Company has made an accounting policy election to account for share-based award forfeitures in compensation costs when they occur. Tax Status. The Company has made an election to qualify, and believes it is operating so as to qualify, as a REIT for federal income tax purposes. Accordingly, the Company generally will not be subject to federal income tax, provided that distributions to its shareholders equal at least the amount of its REIT taxable income as defined under Sections 856 through 860 of the Code. The Company is permitted to participate in certain activities from which it was previously precluded in order to maintain its qualification as a REIT, so long as these activities are conducted in entities which elect to be treated as taxable REIT subsidiaries under the Code. As such, the Company is subject to federal and state income taxes on the income from these activities. Income taxes, primarily related to the Company's taxable REIT subsidiaries, are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. Cash and Cash Equivalents. The Company considers all highly liquid instruments with maturities of three months or less from the date of purchase to be cash equivalents. Restricted Cash. Restricted cash is comprised primarily of cash balances held in escrow by lenders. Environmental Matters. Under various federal, state and local environmental laws, statutes, ordinances, rules and regulations, an owner of real property may be liable for the costs of removal or remediation of certain hazardous or toxic substances at, on, in or under such property as well as certain other potential costs relating to hazardous or toxic substances. These liabilities may include government fines, penalties and damages for injuries to persons and adjacent property. Such laws often impose liability without regard to whether the owner knew of, or was responsible for, the presence or disposal of such substances. Although most of the tenants of properties in which the Company has an interest are primarily responsible for any environmental damage and claims related to the leased premises, in the event of the bankruptcy or inability of the tenant of such premises to satisfy any obligations with respect to such environmental liability, or if the tenant is not responsible, the Company's property owner subsidiary may be required to satisfy any such obligations, should they exist. In addition, the property owner subsidiary, as the owner of such a property, may be held directly liable for any such damages or claims irrespective of the provisions of any lease. As of December 31, 2019 , the Company was not aware of any environmental matter relating to any of its investments that would have a material impact on the consolidated financial statements. Segment Reporting. The Company operates generally in one industry segment, single-tenant real estate assets. Reclassifications . Certain amounts included in prior years' financial statements have been reclassified to conform to the current year's presentation. Upon adoption of ASC 842, the Company reclassified certain amounts on the Consolidated Statements of Operations, primarily the reclassification of tenant reimbursements to rental revenue. As a result, rental revenue increased in 2018 and 2017 by $30,608 and $31,809 , respectively, for the reclassification of tenant reimbursements to conform with the current year presentation of rental revenue. New Accounting Standards Adopted in 2019. In June 2018, the FASB issued Accounting Standard Update (“ASU”) No. 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which aligns the measurement and classification guidance for share-based payments to nonemployees with the guidance for share-based payments to employees, with certain exceptions. The Company adopted this guidance effective January 1, 2019 on a prospective basis. The Company's adoption of this guidance did not have a material impact on its financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, which amends the hedge accounting recognition and presentation requirements in Topic 815. The ASU is effective for reporting periods beginning after December 15, 2018. The Company adopted this guidance effective January 1, 2019 on a prospective basis. The Company's adoption of this guidance did not have a material impact on its financial statements. Additionally, the Company adopted ASU No. 2016-02, Leases (Topic 842) effective January 1, 2019. Topic 842 requires lessees to recognize lease assets and lease liabilities on the balance sheet for those leases previously classified as operating leases. The Company adopted Topic 842 using the modified retrospective transition approach with January 1, 2019 as the Company's date of initial application, thus periods prior to January 1, 2019 conform to ASC Topic 840. The Company has elected other practical expedients permitted under the transition guidance including: • a package of practical expedients that allows the Company to carryforward its assessment of whether a contract is or contains a lease, whether costs incurred qualify as initial direct costs, and historical lease classification for any leases that existed prior to the adoption; • to account for lease and non-lease components as a single component if the (i) timing and patterns of transfer are the same for the lease and non-lease component and (ii) related lease component and the combined single lease component would be classified as an operating lease; • to exclude from the consideration in the contract and variable lease payments all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from the lessee. Taxes assessed on the Company’s total gross receipts are excluded from this accounting policy election; • to not assess if existing land easements in place prior to adoption meet the definition of a lease; and • to not recognize leases with a term of 12 months or less on the balance sheet. The Company did not elect the hindsight practical expedient to determine lease term. The adoption of Topic 842 required the Company to record right-of-use assets and lease liabilities on the Company's Consolidated Balance Sheet. The Company did not recognize a cumulative adjustment to equity upon adoption. The adoption of this guidance did not have a material impact on the Company's Consolidated Statement of Operations and Consolidated Statement of Cash Flows. See note 11, “Leases” for further disclosures. Recently Issued Accounting Guidance. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward-looking “expected loss” model that generally will result in the earlier recognition of an allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of the reported amount. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019. The Company analyzed its accounts receivable using an aging methodology and determined that there have been no historical credit losses related its outstanding accounts receivable. The adoption of this guidance on January 1, 2020 did not have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40). This ASU addresses customer’s accounting for implementation costs incurred in a cloud computing arrangement that is a service contract and also adds certain disclosure requirements related to implementation costs incurred for internal-use software and cloud computing arrangements. The amendment aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The standard is effective for fiscal years beginning after December 15, 2019. The adoption of this guidance on January 1, 2020, did not have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “ Fair Value Measurement (Topic 820) .” ASU 2018-13 amends certain disclosure requirements regarding the fair value hierarchy of investments in accordance with GAAP, particularly the significant unobservable inputs used to value investments within Level 3 of the fair value hierarchy. The standard is effective on January 1, 2020, with early adoption permitted. The Company does not expect the adoption of ASU 2018-13 to have a material impact on the Company's consolidated financial statements.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share A significant portion of the Company's non-vested share-based payment awards are considered participating securities and as such, the Company is required to use the two-class method for the computation of basic and diluted earnings per share. Under the two-class computation method, net losses are not allocated to participating securities unless the holder of the security has a contractual obligation to share in the losses. The non-vested share-based payment awards are not allocated losses as the awards do not have a contractual obligation to share in losses of the Company. The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2019 : 2019 2018 2017 BASIC Net income attributable to common shareholders $ 273,225 $ 220,838 $ 79,067 Weighted-average number of common shares outstanding 237,642,048 236,666,375 237,758,408 Net income attributable to common shareholders - per common share basic $ 1.15 $ 0.93 $ 0.33 DILUTED: Net income attributable to common shareholders - basic $ 273,225 $ 220,838 $ 79,067 Impact of assumed conversions — 2,528 147 Net income attributable to common shareholders $ 273,225 $ 223,366 $ 79,214 Weighted-average common shares outstanding - basic 237,642,048 236,666,375 237,758,408 Effect of dilutive securities: Unvested share-based payment awards and options 292,467 528,495 86,285 Operating Partnership Units — 3,616,120 3,693,144 Weighted-average common shares outstanding - diluted 237,934,515 240,810,990 241,537,837 Net income attributable to common shareholders - per common share diluted $ 1.15 $ 0.93 $ 0.33 For per common share amounts, all incremental shares are considered anti-dilutive for periods that have a loss from continuing operations attributable to common shareholders. In addition, other common share equivalents may be anti-dilutive in certain periods.

Investments in Real Estate

Investments in Real Estate	12 Months Ended
	Dec. 31, 2019
Real Estate Investments, Net [Abstract]
Investments in Real Estate	Investments in Real Estate The Company's real estate, net, consists of the following at December 31, 2019 and 2018 : 2019 2018 Real estate, at cost: Buildings and building improvements $ 2,962,982 $ 2,746,446 Land, land estates and land improvements 355,697 341,848 Construction in progress 1,895 1,840 Real estate intangibles: In-place lease values 339,154 331,607 Tenant relationships 42,396 54,662 Above-market leases 28,206 33,343 Investments in real estate under construction 13,313 — 3,743,643 3,509,746 Accumulated depreciation and amortization (1) (887,629 ) (954,087 ) Real estate, net $ 2,856,014 $ 2,555,659 (1) Includes accumulated amortization of real estate intangible assets of $212,033 and $231,443 in 2019 and 2018 , respectively. The estimated amortization of the above real estate intangible assets for the next five years is $28,634 in 2020 , $26,647 in 2021 , $24,640 in 2022 , $23,487 in 2023 and $18,270 in 2024 . The Company had below-market leases, net of accumulated accretion, which are included in deferred revenue, of $ 19,090 and $ 17,923 , respectively, as of December 31, 2019 and 2018 . The estimated accretion for the next five years is $ 2,550 in 2020 , $ 2,210 in 2021 , $ 1,931 in 2022 , $ 1,931 in 2023 and $ 1,931 in 2024 . The Company completed the following acquisitions during 2019 and 2018 : 2019 : Real Estate Intangibles Property Type Market Acquisition Date Initial Cost Basis Lease Expiration Land Building and Improvements Lease in-place Value Intangible Below Market Lease Intangible Industrial Indianapolis, IN January 2019 $ 20,809 07/2025 $ 1,954 $ 16,820 $ 2,035 $ — Industrial Atlanta, GA February 2019 37,182 10/2023 3,253 30,951 2,978 — Industrial Dallas, TX April 2019 28,201 08/2023 2,420 23,330 2,451 — Industrial Greenville/Spartanburg, SC April 2019 33,253 01/2024 1,615 27,829 3,809 — Industrial Memphis, TN May 2019 49,395 04/2024 2,646 40,452 6,297 — Industrial Memphis, TN May 2019 18,316 05/2023 851 15,465 2,000 — Industrial Atlanta, GA June 2019 45,441 05/2020 3,251 40,023 2,167 — Industrial Atlanta, GA June 2019 27,353 05/2024 2,536 22,825 1,992 — Industrial Cincinnati, OH September 2019 13,762 12/2023 544 12,376 842 — Industrial Cincinnati, OH September 2019 100,288 06/2030 3,950 88,427 7,911 — Industrial Cincinnati, OH September 2019 65,763 08/2027 3,123 60,703 5,392 (3,455 ) Industrial Greenville/Spartanburg, SC October 2019 16,817 01/2024 1,406 14,272 1,139 — Industrial Greenville/Spartanburg, SC October 2019 15,583 04/2025 1,257 13,252 1,074 — Industrial Phoenix, AZ October 2019 21,020 09/2026 3,311 16,013 1,696 — Industrial Phoenix, AZ November 2019 67,079 09/2030 11,970 48,924 6,185 — Industrial Chicago, IL December 2019 49,348 09/2029 3,432 40,947 4,969 — Industrial Greenville/Spartanburg, SC December 2019 94,233 12/2034 6,959 78,364 8,910 — $ 703,843 $ 54,478 $ 590,973 $ 61,847 $ (3,455 ) Weighted-average life of intangible assets (years) 8.4 8.0 In 2019, the Company invested $3,225 in a 23.6 -acre land parcel in the Columbus, Ohio market and commenced construction of a 320,000 square foot warehouse/distribution facility. Also in 2019, the Company acquired an interest in a newly-formed joint venture, ATL Fairburn JV, LLC, that invested $10,088 in an 81 -acre land parcel in the Atlanta, Georgia market to construct a 910,000 square foot warehouse/distribution facility. The Company has a 90% interest in the joint venture and consolidates the joint venture. 2018 : Real Estate Intangibles Property Type Location Acquisition Date Initial Lease Expiration Land and Land Estate Building and Improvements Lease in-place Value Intangible Below Market Lease Intangible Industrial Olive Branch, MS April 2018 $ 44,090 07/2029 $ 1,958 $ 38,687 $ 3,445 $ — Industrial Olive Branch, MS April 2018 48,575 06/2021 2,500 42,538 5,151 (1,614 ) Industrial Edwardsville, IL June 2018 44,178 05/2030 3,649 41,292 3,467 (4,230 ) Industrial Spartanburg, SC August 2018 27,632 07/2024 1,447 23,744 2,441 — Industrial Pasadena, TX August 2018 23,868 08/2023 4,057 17,810 2,001 — Industrial Carrollton, TX September 2018 19,564 12/2033 3,228 15,766 1,247 (677 ) Industrial Goodyear, AZ November 2018 41,372 04/2026 5,247 36,115 2,014 (2,004 ) Industrial Chester, VA December 2018 66,311 06/2030 8,544 53,067 6,832 (2,132 ) $ 315,590 $ 30,630 $ 269,019 $ 26,598 $ (10,657 ) Weighted-average life of intangible assets (years) 8.4 9.4 In addition, the Company acquired a 57 -acre parcel of land from a non-consolidated joint venture and leased the parcel to a tenant that is developing a distribution facility.

Dispositions and Impairment

Dispositions and Impairment	12 Months Ended
	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Dispositions and Impairment	Dispositions and Impairment For the years ended December 31, 2019 , 2018 and 2017 , the Company disposed of its interests in certain properties generating aggregate net proceeds of $504,118 , $898,514 and $223,853 , respectively, which resulted in gains on sales of $250,889 , $252,913 and $63,428 , respectively, including, in 2018, the disposition of 21 office assets to a newly-formed joint venture, NNN Office JV L.P. (“NNN JV”), with an unaffiliated third-party. See note 7. For the years ended December 31, 2019 , 2018 and 2017 , the Company recognized net debt satisfaction gains (charges) relating to properties sold of $(4,415) , $(1,698) and $5,938 , respectively. The Company had no properties classified as held for sale at December 31, 2019 and two properties classified as held for sale at December 31, 2018 . Assets and liabilities of the held for sale properties as of December 31, 2018 consisted of the following: December 31, 2018 Assets: Real estate, at cost $ 63,639 Real estate, intangible assets 14,498 Accumulated depreciation and amortization (16,873 ) Rent receivable - deferred 2,439 Other 165 $ 63,868 Liabilities: Other $ 386 $ 386 The Company assesses on a regular basis whether there are any indicators that the carrying value of real estate assets may be impaired. Potential indicators may include an increase in vacancy at a property, tenant financial instability, change in the estimated holding period of an asset and the potential sale of the property in the near future. An asset is determined to be impaired if the asset's carrying value is in excess of its estimated fair value and the Company estimates that its cost will not be recovered. During 2019 , 2018 and 2017 , the Company recognized aggregate impairment charges on real estate properties of $5,329 , $95,813 and $39,702 , respectively. Included in the impairment charges recognized during 2019 are impairment charges of $2,106 recognized on a vacant retail property in Watertown, New York, which was sold in 2019, $249 recognized on a vacant retail property in Albany, Georgia, which was sold in August 2019 and a held for use impairment of $2,974 recognized on an office property in Baton Rouge, Louisiana due to a reduction of the anticipated holding period and leasing prospects. During 2018 , $36,620 of the impairment charges of $95,813 were recognized on properties held at December 31, 2018, including an aggregate of $23,496 of impairment charges recognized on the Company's office assets in Overland Park, Kansas and Kansas City, Missouri due to a reduction in the anticipated holding period and leasing prospects. During 2017, $18,023 of the impairment charges of $39,702 were recognized on properties held at December 31, 2017. The Company's office asset in Florence, South Carolina and industrial asset in Memphis, Tennessee incurred an aggregate $15,008 of the impairment charges due to a reduction in anticipated holding period. In February 2017, the Company recognized a $5,294 loan loss on the assignment of a loan receivable secured by a hospital in Kennewick, Washington.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following tables present the Company's assets and liabilities measured at fair value on a recurring and non-recurring basis as of December 31, 2019 and 2018 , aggregated by the level in the fair value hierarchy within which those measurements fall: Fair Value Measurements Using Description 2019 (Level 1) (Level 2) (Level 3) Interest rate swap liabilities $ (1,928 ) $ — $ (1,928 ) $ — Impaired real estate assets* $ 4,846 $ — $ — $ 4,846 Fair Value Measurements Using Description 2018 (Level 1) (Level 2) (Level 3) Interest rate swap assets $ 76 $ — $ 76 $ — Impaired real estate assets* $ 35,036 $ — $ — $ 35,036 *Represents a non-recurring fair value measurement. Fair value as of the date of impairment. The majority of the inputs used to value the Company's interest rate swaps fall within Level 2 of the fair value hierarchy, such as observable market interest rate curves; however, the credit valuation associated with the interest rate swaps utilizes Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. As of December 31, 2019 and 2018 , the Company determined that the credit valuation adjustment relative to the overall interest rate swaps was not significant. As a result, all interest rate swaps have been classified in Level 2 of the fair value hierarchy. The table below sets forth the carrying amounts and estimated fair values of the Company's financial instruments as of December 31, 2019 and 2018 : As of December 31, 2019 As of December 31, 2018 Carrying Amount Fair Value Carrying Amount Fair Value Liabilities Debt $ 1,311,977 $ 1,276,589 $ 1,492,483 $ 1,409,773 The fair value of the Company's debt is primarily estimated utilizing Level 3 inputs by using a discounted cash flow analysis, based upon estimates of market interest rates. The Company determines the fair value of its Senior Notes using market prices. The inputs used in determining the fair value of these notes are categorized as Level 1 due to the fact that the Company uses quoted market rates to value these instruments. However, the inputs used in determining the fair value could be categorized as Level 2 if trading volumes are low. Fair values cannot be determined with precision, may not be substantiated by comparison to quoted prices in active markets and may not be realized upon sale. Additionally, there are inherent uncertainties in any fair value measurement technique, and changes in the underlying assumptions used, including discount rates, liquidity risks and estimates of future cash flows, could significantly affect the fair value measurement amounts. Cash Equivalents, Restricted Cash, Accounts Receivable and Accounts Payable . The Company estimates that the fair value of cash equivalents, restricted cash, accounts receivable and accounts payable approximates carrying value due to the relatively short maturity of the instruments.

Investments in Non-Consolidated

Investments in Non-Consolidated Entities	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investments in Non-Consolidated Entities	Investments in Non-Consolidated Entities Below is a schedule of the Company's investments in non-consolidated entities: Percentage Ownership at Investment Balance as of Investment December 31, 2019 December 31, 2019 December 31, 2018 NNN JV (1) 20% $ 39,288 $ 53,144 Etna Park 70 LLC (2) 90% 8,352 4,774 Etna Park 70 East LLC (3) 90% 4,310 — Other (4) 15% to 25% 5,218 8,265 $ 57,168 $ 66,183 (1) During 2018, the Company disposed of 21 office assets to NNN JV for an aggregate gross disposition price of $725,800 and acquired a 20% interest in NNN JV. Two of the 21 properties, with a combined estimated fair value of $45,653 , were contributed to NNN JV along with cash of $8,053 . The Company recognized a gain of $14,645 in connection with the contribution of the two office assets to NNN JV, and in addition, NNN JV assumed an aggregate of $103,400 of non-recourse mortgage debt in the transaction. NNN JV obtained an aggregate of $362,800 of non-recourse mortgage financing which bears interest at LIBOR plus 200 basis points and has an initial term of three years but can be extended for two additional terms of one -year each. There is a rate increase of 15 basis points upon each extension. NNN JV entered into interest rate agreements which cap the LIBOR component of the $362,800 mortgage financing at 4.0% for two years . (2) Joint venture formed in 2017 with a developer entity to acquire a 151 -acre parcel of developable land and pursue industrial build-to-suit opportunities. The Company determined it is not the primary beneficiary. In December 2018, the parcel was subdivided and the Company received a distribution of an ownership interest in a 57 -acre parcel with a historical cost of $3,008 . The Company acquired control of the parcel via the purchase of the Company's joint venture partners' interest. (3) Joint venture formed in 2019 with a developer entity to acquire a 129.6 -acre parcel of developable land and pursue industrial build-to-suit opportunities. The Company determined it is not the primary beneficiary. (4) At December 31, 2019 , represents one joint venture investment, which owns a single-tenant, net-leased asset. In February 2019, a non-consolidated real estate entity, in which the Company owned a 15% ownership interest, sold its only asset and the Company received $2,317 of proceeds. The Company recognized a gain on the transaction of $824 , which is included in equity in earnings of non-consolidated entities in its Consolidated Statement of Operations. During 2019, NNN JV sold four assets and the Company recognized aggregate gains on the transactions of $3,529 within equity in earnings of non-consolidated entities in its consolidated statement of operations. In conjunction with these property sales, NNN JV received aggregate net proceeds of $45,208 after satisfaction of an aggregate of $101,520 of its non-recourse mortgage indebtedness. The NNN JV distributed $7,549 of the net proceeds to the Company as a result of the property sales. In December 2018, the Company received $4,312 from a non-consolidated investment in connection with its sale of a six -property office portfolio. In February 2017, the Company sold its 40% tenant-in-common interest in its Oklahoma City, Oklahoma office property for $6,198 . The Company recognized gains of $1,777 and $1,452 , respectively, in connection with these sales, which are included in equity in earnings of non-consolidated entities. During 2017, the Company recognized an impairment charge of $3,512 on its investment in a retail property in Palm Beach Gardens, Florida due to the bankruptcy of its tenant. This impairment charge reduced the Company's investment balance to zero . During 2018, the property was sold in a foreclosure sale. The Company earns advisory fees from certain of these non-consolidated entities for services related to acquisitions, asset management and debt placement. Advisory fees earned from these non-consolidated investments were $3,596 , $1,443 and $807 for the years ended December 31, 2019 , 2018 and 2017 .

Mortgages and Notes Payable

Mortgages and Notes Payable	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Mortgages and Notes Payable	Mortgages and Notes Payable The Company had the following mortgages and notes payable outstanding as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 Mortgages and notes payable $ 393,872 $ 575,514 Unamortized debt issuance costs (3,600 ) (5,094 ) $ 390,272 $ 570,420 Interest rates, including imputed rates on mortgages and notes payable, ranged from 3.5% to 6.5% and 2.2% to 6.5% at December 31, 2019 and 2018 , respectively, and all mortgages and notes payable mature between 2020 and 2036 , as of December 31, 2019 . The weighted-average interest rate at December 31, 2019 and 2018 was approximately 4.5% . As of December 31, 2019 , the Company had two non-recourse mortgage loans that were in default with an outstanding aggregate principal balance of $38,942 . Each mortgage loan is secured by an office property (Overland Park, Kansas and Charleston, South Carolina), which was vacant or mostly vacant at December 31, 2019 . The Company has an unsecured credit agreement with KeyBank National Association, as agent. A summary of the significant terms, as of December 31, 2019 , are as follows: Maturity Date Interest Rate $600,000 Revolving Credit Facility (1) February 2023 LIBOR + 0.90% $300,000 Term Loan (1)(2) January 2025 LIBOR + 1.00% (1) In February 2019, the Company: (i) increased the total commitment of the revolving credit facility from $505,000 to $600,000 ; (ii) extended the maturity date of the revolving credit facility from August 2019 to February 2023 and allowed for the extension to February 2024 at the Company's option; and (iii) reduced the applicable margin rates. In July 2019, the Company extended the maturity of the $300,000 term loan from January 2021 to January 2025 and swapped the LIBOR portion of the interest rate to obtain a current fixed rate of 2.732% per annum. The Company recognized $93 of debt satisfaction charges in connection with these transactions. At December 31, 2019 , the revolving credit facility had no borrowings outstanding and availability of $600,000 , subject to covenant compliance. (2) The aggregate unamortized debt issuance costs for the term loan was $2,561 and $1,267 as of December 31, 2019 and 2018 , respectively. The unsecured revolving credit facility and the unsecured term loan are subject to financial covenants, which the Company was in compliance with at December 31, 2019 . Mortgages payable and secured loans are generally collateralized by real estate and the related leases. Certain mortgages payable have yield maintenance or defeasance requirements relating to any prepayments. Scheduled principal and balloon payments for mortgages, notes payable and term loan for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ 71,099 2021 36,597 2022 18,564 2023 20,136 2024 13,856 Thereafter 533,620 693,872 Unamortized debt issuance costs (6,161 ) $ 687,711 Included in the Consolidated Statements of Operations, the Company recognized debt satisfaction gains (charges), net, of $(9) , $(898) and $258 for the years ended December 31, 2019 , 2018 and 2017 , respectively, due to the satisfaction of mortgages and notes payable other than those disclosed elsewhere in these financial statements. In addition, the Company capitalized $410 , $15 and $1,174 in interest for the years ended 2019 , 2018 and 2017 , respectively. Senior Notes, Convertible Notes and Trust Preferred Securities The Company had the following Senior Notes outstanding as of December 31, 2019 and 2018 : Issue Date December 31, 2019 December 31, 2018 Interest Rate Maturity Date Issue Price May 2014 $ 250,000 $ 250,000 4.40 % June 2024 99.883 % June 2013 250,000 250,000 4.25 % June 2023 99.026 % 500,000 500,000 Unamortized debt discount (963 ) (1,235 ) Unamortized debt issuance cost (2,167 ) (2,731 ) $ 496,870 $ 496,034 Each series of the Senior Notes is unsecured and pays interest semi-annually in arrears. The Company may redeem the notes at its option at any time prior to maturity in whole or in part by paying the principal amount of the notes being redeemed plus a premium. During 2007, the Company issued $200,000 original principal amount of Trust Preferred Securities. The Trust Preferred Securities, which are classified as debt, are due in 2037, are open for redemption at the Company's option, bore interest at a fixed rate of 6.804% through April 2017 and thereafter bear interest at a variable rate of three month LIBOR plus 1.7 basis points through maturity. The interest rate at December 31, 2019 was 3.636% . As of December 31, 2019 and 2018 , there was $129,120 original principal amount of Trust Preferred Securities outstanding and $1,724 and $1,824 , respectively, of unamortized debt issuance costs. Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 129,120 629,120 Unamortized debt discounts (963 ) Unamortized debt issuance costs (3,891 ) $ 624,266

Senior Notes, Convertible Notes

Senior Notes, Convertible Notes and Trust Preferred Securities	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Senior Notes, Convertible Notes and Trust Preferred Securities	Mortgages and Notes Payable The Company had the following mortgages and notes payable outstanding as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 Mortgages and notes payable $ 393,872 $ 575,514 Unamortized debt issuance costs (3,600 ) (5,094 ) $ 390,272 $ 570,420 Interest rates, including imputed rates on mortgages and notes payable, ranged from 3.5% to 6.5% and 2.2% to 6.5% at December 31, 2019 and 2018 , respectively, and all mortgages and notes payable mature between 2020 and 2036 , as of December 31, 2019 . The weighted-average interest rate at December 31, 2019 and 2018 was approximately 4.5% . As of December 31, 2019 , the Company had two non-recourse mortgage loans that were in default with an outstanding aggregate principal balance of $38,942 . Each mortgage loan is secured by an office property (Overland Park, Kansas and Charleston, South Carolina), which was vacant or mostly vacant at December 31, 2019 . The Company has an unsecured credit agreement with KeyBank National Association, as agent. A summary of the significant terms, as of December 31, 2019 , are as follows: Maturity Date Interest Rate $600,000 Revolving Credit Facility (1) February 2023 LIBOR + 0.90% $300,000 Term Loan (1)(2) January 2025 LIBOR + 1.00% (1) In February 2019, the Company: (i) increased the total commitment of the revolving credit facility from $505,000 to $600,000 ; (ii) extended the maturity date of the revolving credit facility from August 2019 to February 2023 and allowed for the extension to February 2024 at the Company's option; and (iii) reduced the applicable margin rates. In July 2019, the Company extended the maturity of the $300,000 term loan from January 2021 to January 2025 and swapped the LIBOR portion of the interest rate to obtain a current fixed rate of 2.732% per annum. The Company recognized $93 of debt satisfaction charges in connection with these transactions. At December 31, 2019 , the revolving credit facility had no borrowings outstanding and availability of $600,000 , subject to covenant compliance. (2) The aggregate unamortized debt issuance costs for the term loan was $2,561 and $1,267 as of December 31, 2019 and 2018 , respectively. The unsecured revolving credit facility and the unsecured term loan are subject to financial covenants, which the Company was in compliance with at December 31, 2019 . Mortgages payable and secured loans are generally collateralized by real estate and the related leases. Certain mortgages payable have yield maintenance or defeasance requirements relating to any prepayments. Scheduled principal and balloon payments for mortgages, notes payable and term loan for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ 71,099 2021 36,597 2022 18,564 2023 20,136 2024 13,856 Thereafter 533,620 693,872 Unamortized debt issuance costs (6,161 ) $ 687,711 Included in the Consolidated Statements of Operations, the Company recognized debt satisfaction gains (charges), net, of $(9) , $(898) and $258 for the years ended December 31, 2019 , 2018 and 2017 , respectively, due to the satisfaction of mortgages and notes payable other than those disclosed elsewhere in these financial statements. In addition, the Company capitalized $410 , $15 and $1,174 in interest for the years ended 2019 , 2018 and 2017 , respectively. Senior Notes, Convertible Notes and Trust Preferred Securities The Company had the following Senior Notes outstanding as of December 31, 2019 and 2018 : Issue Date December 31, 2019 December 31, 2018 Interest Rate Maturity Date Issue Price May 2014 $ 250,000 $ 250,000 4.40 % June 2024 99.883 % June 2013 250,000 250,000 4.25 % June 2023 99.026 % 500,000 500,000 Unamortized debt discount (963 ) (1,235 ) Unamortized debt issuance cost (2,167 ) (2,731 ) $ 496,870 $ 496,034 Each series of the Senior Notes is unsecured and pays interest semi-annually in arrears. The Company may redeem the notes at its option at any time prior to maturity in whole or in part by paying the principal amount of the notes being redeemed plus a premium. During 2007, the Company issued $200,000 original principal amount of Trust Preferred Securities. The Trust Preferred Securities, which are classified as debt, are due in 2037, are open for redemption at the Company's option, bore interest at a fixed rate of 6.804% through April 2017 and thereafter bear interest at a variable rate of three month LIBOR plus 1.7 basis points through maturity. The interest rate at December 31, 2019 was 3.636% . As of December 31, 2019 and 2018 , there was $129,120 original principal amount of Trust Preferred Securities outstanding and $1,724 and $1,824 , respectively, of unamortized debt issuance costs. Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 129,120 629,120 Unamortized debt discounts (963 ) Unamortized debt issuance costs (3,891 ) $ 624,266

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities Risk Management Objective of Using Derivatives . The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the type, amount, sources, and duration of its debt funding and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company's known or expected cash receipts and its known or expected cash payments principally related to the Company's investments and borrowings. Cash Flow Hedges of Interest Rate Risk . The Company's objectives in using interest rate derivatives are to add stability to interest expense, to manage its exposure to interest rate movements and therefore manage its cash outflows as it relates to the underlying debt instruments. To accomplish these objectives the Company primarily uses interest rate swaps as part of its interest rate risk management strategy relating to certain of its variable rate debt instruments. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. For 2018 and 2017, the ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. The Company did not incur any ineffectiveness during 2018 and 2017 . During July 2019, the Company entered into four interest rate swap agreements with its counterparties. The swaps were designated as cash flow hedges of the risk of variability attributable to changes in the LIBOR swap rates on its $300,000 LIBOR-indexed variable-rate unsecured term loan. Accordingly, changes in fair value of the swaps are recorded in other comprehensive income (loss) and reclassified to earnings as interest becomes receivable or payable. The swaps expire coterminous with the extended maturity of the term loan in January 2025. During the next 12 months, the Company estimates that an additional $366 will be reclassified as an increase to interest expense if the swaps remain outstanding. As of December 31, 2019 , the Company had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk: Interest Rate Derivative Number of Instruments Notional Interest Rate Swaps 4 $300,000 The table below presents the fair value of the Company's derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of December 31, 2019 and 2018 . As of December 31, 2019 As of December 31, 2018 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments: Interest Rate Swap Asset/Liability Other liabilities $ (1,928 ) Other assets $ 76 The table below present the effect of the Company's derivative financial instruments on the Consolidated Statements of Operations for 2019 and 2018 : Derivatives in Cash Flow Amount of Income (Loss) Recognized Location of Income Reclassified from Accumulated OCI into Income Amount of Income Hedging Relationships 2019 2018 2019 2018 Interest Rate Swap $ (1,625 ) $ 597 Interest expense $ (379 ) $ (1,586 ) Total interest expense presented in the Consolidated Statements of Operations in which the effects of cash flow hedges are recorded was $65,095 and $79,880 for 2019 and 2018, respectively. The Company's agreements with the swap derivative counterparties contain provisions whereby if the Company defaults on the underlying indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default of the swap derivative obligation. As of December 31, 2019

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Leases Lessor Lexington’s lease portfolio as a lessor primarily includes general purpose, single-tenant net-leased real estate assets. Most of the Company’s leases require tenants to pay fixed annual rental payments that escalate on an annual basis and variable payments for other operating expenses, such as real estate taxes, insurance, common area maintenance ("CAM"), and utilities, that are based on the actual expenses incurred. Certain leases allow for the tenant to renew the lease term upon expiration or earlier. Periods covered by a renewal option are included within the lease term only when renewals are deemed to be reasonably certain. Certain leases allow for the tenant to terminate the lease before the expiration of lease term and certain leases provide the tenant with the right to purchase the leased property at fair market value or a stipulated price upon expiration of the lease term or before. Accounting guidance under Topic 842 requires the Company to make certain assumptions and judgments in applying the guidance, including determining whether an arrangement includes a lease and determining the lease term when the contract has renewal, purchase or early termination provisions. The Company analyzes its accounts receivable, customer creditworthiness and current economic trends when evaluating the adequacy of the collectability of the lessee's total accounts receivable balance on a lease by lease basis. In addition, tenants in bankruptcy are analyzed and considerations are made in connection with the expected pre-petition and post-petition claims. If a lessee's accounts receivable balance is considered uncollectable, the Company will write-off the receivable balances associated with the lease to rental revenue and cease to recognize lease income, including straight-line rent, unless cash is received. If the Company subsequently determines that it is probable it will collect substantially all of the lessee's remaining lease payments under the lease term; the Company will reinstate the straight-line balance adjusting for the amount related to the period when the lease payments were considered not probable. During 2019 , rental revenue was reduced by $352 for accounts receivable deemed uncollectable primarily related to the tenant in Thompson, Georgia filing for bankruptcy. In August 2019, the tenant of the Columbus, Indiana property began paying rent into a court administered account. See note 17. The litigation was in an early stage and discovery was ongoing. Due to the inherent uncertainty of, and the early stage of this, litigation, the Company did not recognize rental revenue of $1,100 , representing rental revenue for August and September 2019. On December 19, 2019, the Company sold its interest in the Columbus, Indiana property to the tenant for a gross purchase price of $46,915 and terminated the tenant's lease as part of the settlement of the litigation. At closing of the sale, the tenant paid rent for the period from August 1, 2019 to December 18, 2019 in the amount of $1,885 and reimbursed the Company for $700 in expenses under the indemnity provision in the lease. The Company determined that the lease and non-lease components in its leases are a single lease component and is, therefore, being recognized as rental revenue in its consolidated statements of operations. The primary non-lease services that are included within rental revenue are CAM services provided as part of the Company’s real estate leases. Topic 842 requires that the Company capitalize, as initial direct costs, only those costs that are incurred due to the execution of a lease. As of December 31, 2019 , the Company incurred $191 of costs that were not incremental to the execution of leases, which are included in property operating expenses on its consolidated statements of operations. The Company manages the risk associated with the residual value of its leased properties by including contract clauses that make tenants responsible for surrendering the space in good condition upon lease termination, holding a diversified portfolio, and other activities . The Company does not have residual value guarantees on specific properties. The following table presents the Company’s classification of rental revenue for its operating leases for the year ended December 31, 2019 : Classification Fixed Variable (1) Total Rental revenue $ 291,892 $ 28,730 $ 320,622 (1) Primarily comprised of tenant reimbursements. Future fixed rental receipts for leases, assuming no new or re-negotiated leases as of December 31, 2019 were as follows: 2020 $ 269,701 2021 258,937 2022 245,527 2023 242,009 2024 210,765 Thereafter 1,399,068 Total $ 2,626,007 The above minimum lease payments do not include reimbursements to be received from tenants for certain operating expenses and real estate taxes and do not include early termination payments provided for in certain leases, if not reasonably assured. Certain leases allow for the tenant to terminate the lease if the property is deemed obsolete, as defined, and upon payment of a termination fee to the landlord, as stipulated in the lease. In addition, certain leases provide the tenant with the right to purchase the leased property at fair market value or a stipulated price. Minimum future lease payments under the non-cancellable portion of tenant leases, assuming no new or re-negotiated leases, for the next five years and thereafter in accordance with ASC Topic 840 as of December 31, 2018 were as follows: Year ending December 31, Total 2019 $ 270,557 2020 253,660 2021 233,192 2022 212,893 2023 211,387 Thereafter 1,619,848 $ 2,801,537 Lessee The Company has ground leases, corporate leases for office space, and office equipment leases. All leases were classified as operating leases as of December 31, 2019 . The leases have remaining lease terms of up to 43 years , some of which include options to extend the leases in 5 to 10-year increments for up to 53 years . Renewal periods are included in the lease term only when renewal is deemed to be reasonably certain. The lease term also includes periods covered by an option to terminate the lease if the Company is reasonably certain not to exercise the termination option. The Company measures its lease payments by including fixed rental payments and variable rental payments that tie to an index or a rate, such as CPI. Minimum lease payments for leases that commenced before the date of adoption of ASC 842 were determined based on previous leases guidance under ASC 840. The Company recognizes lease expense for its operating leases on a straight-line basis over the lease term and variable lease expense not included in the lease payment measurement as incurred. The accounting guidance under Topic 842 requires the Company to make certain assumptions and judgments in applying the guidance, including determining whether an arrangement includes a lease, determining the term of a lease when the contract has renewal or termination provisions and determining the discount rate. The Company determines whether an arrangement is or includes a lease at contract inception by evaluating whether the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. If the Company has the right to obtain substantially all of the economic benefits from and can direct the use of, the identified asset for a period of time, the Company accounts for the contract as a lease. As the Company does not know the rate implicit in the respective leases, the Company used its incremental borrowing rate based on the information available at the transition date for such existing leases. The Company uses the information available at the lease commencement date to determine the discount rate for any new leases. The Company used a portfolio approach to determine its incremental borrowing rate. Lease contracts were grouped based on similar lease terms and economic environments in a manner in which the Company reasonably expects that the outcome from applying a portfolio approach does not differ materially from an individual lease approach. The Company estimated a collateralized discount rate for each portfolio of leases. Supplemental information related to operating leases as of December 31, 2019 is as follows: Weighted-average remaining lease term Operating leases (years) 12.3 Weighted-average discount rate Operating leases 4.1 % The components of lease expense for the year ended December 31, 2019 were as follows: Income Statement Classification Fixed Variable Total Property operating $ 3,982 $ — $ 3,982 General and administrative 1,343 112 1,455 Total $ 5,325 $ 112 $ 5,437 The Company recognized sublease income of $3,764 in 2019. The following table shows the Company's maturity analysis of its operating lease liabilities as of December 31, 2019 : Operating Leases 2020 $ 5,236 2021 5,060 2022 5,135 2023 5,279 2024 5,301 Thereafter 25,621 Total lease payments $ 51,632 Less: Imputed interest (12,190 ) Present value of lease liabilities $ 39,442 The Company leases its corporate headquarters. The lease expires March 2026. The Company is responsible for its proportionate share of operating expenses and real estate taxes above a base year. In addition, the Company leases office space for its regional offices. The minimum rent payments for the Company's offices are $1,296 for 2020, $1,325 for 2021, $1,335 for 2022, $1,305 for 2023 and $1,305 for 2024 and $1,631 thereafter, which are included in the table above. Rent expense for 2019, 2018 and 2017 was $1,312 , $1,274 and $1,256 , respectively. The following table shows the Company's future minimum lease rental payments under non-cancellable leasehold interests in accordance with ASC Topic 840 as of December 31, 2018: Year ending December 31, Total 2019 $ 3,826 2020 3,827 2021 3,769 2022 3,834 2023 4,008 Thereafter 28,326 $ 47,590 Rent expense for the leasehold interests was $597 and $690 in 2018 and 2017, respectively.
Leases	Leases Lessor Lexington’s lease portfolio as a lessor primarily includes general purpose, single-tenant net-leased real estate assets. Most of the Company’s leases require tenants to pay fixed annual rental payments that escalate on an annual basis and variable payments for other operating expenses, such as real estate taxes, insurance, common area maintenance ("CAM"), and utilities, that are based on the actual expenses incurred. Certain leases allow for the tenant to renew the lease term upon expiration or earlier. Periods covered by a renewal option are included within the lease term only when renewals are deemed to be reasonably certain. Certain leases allow for the tenant to terminate the lease before the expiration of lease term and certain leases provide the tenant with the right to purchase the leased property at fair market value or a stipulated price upon expiration of the lease term or before. Accounting guidance under Topic 842 requires the Company to make certain assumptions and judgments in applying the guidance, including determining whether an arrangement includes a lease and determining the lease term when the contract has renewal, purchase or early termination provisions. The Company analyzes its accounts receivable, customer creditworthiness and current economic trends when evaluating the adequacy of the collectability of the lessee's total accounts receivable balance on a lease by lease basis. In addition, tenants in bankruptcy are analyzed and considerations are made in connection with the expected pre-petition and post-petition claims. If a lessee's accounts receivable balance is considered uncollectable, the Company will write-off the receivable balances associated with the lease to rental revenue and cease to recognize lease income, including straight-line rent, unless cash is received. If the Company subsequently determines that it is probable it will collect substantially all of the lessee's remaining lease payments under the lease term; the Company will reinstate the straight-line balance adjusting for the amount related to the period when the lease payments were considered not probable. During 2019 , rental revenue was reduced by $352 for accounts receivable deemed uncollectable primarily related to the tenant in Thompson, Georgia filing for bankruptcy. In August 2019, the tenant of the Columbus, Indiana property began paying rent into a court administered account. See note 17. The litigation was in an early stage and discovery was ongoing. Due to the inherent uncertainty of, and the early stage of this, litigation, the Company did not recognize rental revenue of $1,100 , representing rental revenue for August and September 2019. On December 19, 2019, the Company sold its interest in the Columbus, Indiana property to the tenant for a gross purchase price of $46,915 and terminated the tenant's lease as part of the settlement of the litigation. At closing of the sale, the tenant paid rent for the period from August 1, 2019 to December 18, 2019 in the amount of $1,885 and reimbursed the Company for $700 in expenses under the indemnity provision in the lease. The Company determined that the lease and non-lease components in its leases are a single lease component and is, therefore, being recognized as rental revenue in its consolidated statements of operations. The primary non-lease services that are included within rental revenue are CAM services provided as part of the Company’s real estate leases. Topic 842 requires that the Company capitalize, as initial direct costs, only those costs that are incurred due to the execution of a lease. As of December 31, 2019 , the Company incurred $191 of costs that were not incremental to the execution of leases, which are included in property operating expenses on its consolidated statements of operations. The Company manages the risk associated with the residual value of its leased properties by including contract clauses that make tenants responsible for surrendering the space in good condition upon lease termination, holding a diversified portfolio, and other activities . The Company does not have residual value guarantees on specific properties. The following table presents the Company’s classification of rental revenue for its operating leases for the year ended December 31, 2019 : Classification Fixed Variable (1) Total Rental revenue $ 291,892 $ 28,730 $ 320,622 (1) Primarily comprised of tenant reimbursements. Future fixed rental receipts for leases, assuming no new or re-negotiated leases as of December 31, 2019 were as follows: 2020 $ 269,701 2021 258,937 2022 245,527 2023 242,009 2024 210,765 Thereafter 1,399,068 Total $ 2,626,007 The above minimum lease payments do not include reimbursements to be received from tenants for certain operating expenses and real estate taxes and do not include early termination payments provided for in certain leases, if not reasonably assured. Certain leases allow for the tenant to terminate the lease if the property is deemed obsolete, as defined, and upon payment of a termination fee to the landlord, as stipulated in the lease. In addition, certain leases provide the tenant with the right to purchase the leased property at fair market value or a stipulated price. Minimum future lease payments under the non-cancellable portion of tenant leases, assuming no new or re-negotiated leases, for the next five years and thereafter in accordance with ASC Topic 840 as of December 31, 2018 were as follows: Year ending December 31, Total 2019 $ 270,557 2020 253,660 2021 233,192 2022 212,893 2023 211,387 Thereafter 1,619,848 $ 2,801,537 Lessee The Company has ground leases, corporate leases for office space, and office equipment leases. All leases were classified as operating leases as of December 31, 2019 . The leases have remaining lease terms of up to 43 years , some of which include options to extend the leases in 5 to 10-year increments for up to 53 years . Renewal periods are included in the lease term only when renewal is deemed to be reasonably certain. The lease term also includes periods covered by an option to terminate the lease if the Company is reasonably certain not to exercise the termination option. The Company measures its lease payments by including fixed rental payments and variable rental payments that tie to an index or a rate, such as CPI. Minimum lease payments for leases that commenced before the date of adoption of ASC 842 were determined based on previous leases guidance under ASC 840. The Company recognizes lease expense for its operating leases on a straight-line basis over the lease term and variable lease expense not included in the lease payment measurement as incurred. The accounting guidance under Topic 842 requires the Company to make certain assumptions and judgments in applying the guidance, including determining whether an arrangement includes a lease, determining the term of a lease when the contract has renewal or termination provisions and determining the discount rate. The Company determines whether an arrangement is or includes a lease at contract inception by evaluating whether the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. If the Company has the right to obtain substantially all of the economic benefits from and can direct the use of, the identified asset for a period of time, the Company accounts for the contract as a lease. As the Company does not know the rate implicit in the respective leases, the Company used its incremental borrowing rate based on the information available at the transition date for such existing leases. The Company uses the information available at the lease commencement date to determine the discount rate for any new leases. The Company used a portfolio approach to determine its incremental borrowing rate. Lease contracts were grouped based on similar lease terms and economic environments in a manner in which the Company reasonably expects that the outcome from applying a portfolio approach does not differ materially from an individual lease approach. The Company estimated a collateralized discount rate for each portfolio of leases. Supplemental information related to operating leases as of December 31, 2019 is as follows: Weighted-average remaining lease term Operating leases (years) 12.3 Weighted-average discount rate Operating leases 4.1 % The components of lease expense for the year ended December 31, 2019 were as follows: Income Statement Classification Fixed Variable Total Property operating $ 3,982 $ — $ 3,982 General and administrative 1,343 112 1,455 Total $ 5,325 $ 112 $ 5,437 The Company recognized sublease income of $3,764 in 2019. The following table shows the Company's maturity analysis of its operating lease liabilities as of December 31, 2019 : Operating Leases 2020 $ 5,236 2021 5,060 2022 5,135 2023 5,279 2024 5,301 Thereafter 25,621 Total lease payments $ 51,632 Less: Imputed interest (12,190 ) Present value of lease liabilities $ 39,442 The Company leases its corporate headquarters. The lease expires March 2026. The Company is responsible for its proportionate share of operating expenses and real estate taxes above a base year. In addition, the Company leases office space for its regional offices. The minimum rent payments for the Company's offices are $1,296 for 2020, $1,325 for 2021, $1,335 for 2022, $1,305 for 2023 and $1,305 for 2024 and $1,631 thereafter, which are included in the table above. Rent expense for 2019, 2018 and 2017 was $1,312 , $1,274 and $1,256 , respectively. The following table shows the Company's future minimum lease rental payments under non-cancellable leasehold interests in accordance with ASC Topic 840 as of December 31, 2018: Year ending December 31, Total 2019 $ 3,826 2020 3,827 2021 3,769 2022 3,834 2023 4,008 Thereafter 28,326 $ 47,590 Rent expense for the leasehold interests was $597 and $690 in 2018 and 2017, respectively.

Concentration of Risk

Concentration of Risk	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Concentration of Risk	Concentration of Risk The Company seeks to reduce its operating and leasing risks through the geographic diversification of its properties, tenant industry diversification, avoidance of dependency on a single asset and the creditworthiness of its tenants. For the years ended December 31, 2019 , 2018 and 2017 , no single tenant represented greater than 10% of rental revenues. Cash and cash equivalent balances at certain institutions may exceed insurable amounts. The Company believes it mitigates this risk by investing in or through major financial institutions.

Equity

Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Equity	Equity Shareholders' Equity: The Company maintains an At-The-Market offering program ("ATM program") under which the Company can issue common shares. Under the ATM program, the Company may enter into forward sales agreements with agents. As of December 31, 2019, the Company has not entered into any forward sale agreements. During 2019, the Company issued 9,668,748 common shares under the ATM program and generated net proceeds of $102,299 . As of December 31, 2019 , $296,076 in common shares remain available for issuance under the ATM program. During 2018, the Company did no t issue common shares under its ATM program. During 2017, the Company issued 1,593,603 common shares under the ATM program and generated aggregate gross proceeds of $17,362 . The proceeds from these issuances were primarily used for general working capital, to fund investments and retire indebtedness. During 2019, the Company issued 10,000,000 common shares at $10.09 per common share in an underwritten offering and generated net proceeds of $100,749 . The proceeds were used for working capital and for general corporate purposes, including acquisitions. The Company had 1,935,400 shares of Series C Cumulative Convertible Preferred Stock (“Series C Preferred”) outstanding at December 31, 2019 . The shares have a dividend of $3.25 per share per annum, have a liquidation preference of $96,770 , and the Company, if certain common share prices are achieved, can force conversion into common shares of the Company. As of December 31, 2019 , each share was convertible into 2.4339 common shares. This conversion ratio may increase over time if the Company's common share dividend exceeds certain quarterly thresholds. If certain fundamental changes occur, holders may require the Company, in certain circumstances, to repurchase all or part of their shares of Series C Preferred. In addition, upon the occurrence of certain fundamental changes, the Company will, under certain circumstances, increase the conversion rate by a number of additional common shares or, in lieu thereof, may in certain circumstances elect to adjust the conversion rate upon the shares of Series C Preferred becoming convertible into shares of the public acquiring or surviving company. The Company may, at the Company's option, cause shares of Series C Preferred to be automatically converted into that number of common shares that are issuable at the then prevailing conversion rate. The Company may exercise its conversion right only if, at certain times, the closing price of the Company's common shares equals or exceeds 125% of the then prevailing conversion price of the Series C Preferred. Investors in shares of Series C Preferred generally have no voting rights, but will have limited voting rights if the Company fails to pay dividends for six or more quarters and under certain other circumstances. Upon conversion, the Company may choose to deliver the conversion value to investors in cash, common shares, or a combination of cash and common shares. During 2019 , 2018 and 2017 , the Company issued 896,807 , 965,932 and 835,234 of its common shares, respectively, to certain employees and trustees. Typically, trustee share grants vest immediately. Employee share grants generally vest ratably, on anniversaries of the grant date, however, in certain situations vesting is cliff-based after a specific number of years and/or subject to meeting certain performance criteria (see note 14). In July 2015, the Company's Board of Trustees authorized the repurchase of up to 10,000,000 common shares and increased this authorization by 10,000,000 common shares in 2018. This share repurchase program has no expiration date. During 2019 and 2018, the Company repurchased and retired 441,581 and 5,851,252 common shares, respectively, at an average price of $8.13 and $8.05 , respectively, per common share under this share repurchase program. No shares were repurchased in 2017. As of December 31, 2019, 10,306,255 common shares remain available for repurchase under this authorization. The Company records a liability for repurchases that have not yet been settled as of period end. There were no unsettled repurchases as of December 31, 2019 . During 2019, the Company settled $2,641 of shares repurchased as of December 31, 2018. A summary of the changes in accumulated other comprehensive income (loss) related to the Company's cash flow hedges is as follows: Twelve months ended December 31, 2019 2018 Balance at beginning of period $ 76 $ 1,065 Other comprehensive income (loss) before reclassifications (1,625 ) 597 Amounts of income reclassified from accumulated other comprehensive income (loss) to interest expense (379 ) (1,586 ) Balance at end of period $ (1,928 ) $ 76 Noncontrolling Interests: In conjunction with several of the Company's acquisitions in prior years, sellers were issued OP units as a form of consideration. All OP units, other than OP units owned by the Company, are redeemable for common shares at certain times, at the option of the holders, and are generally not otherwise mandatorily redeemable by the Company. The OP units are classified as a component of permanent equity as the Company has determined that the OP units are not redeemable securities as defined by GAAP. Each OP unit is currently redeemable for approximately 1.13 common shares, subject to future adjustments. During 2019 , 2018 and 2017 , 391,993 , 53,388 and 140,746 common shares, respectively, were issued by the Company, in connection with OP unit redemptions, for an aggregate value of $1,655 , $189 and $584 , respectively. As of December 31, 2019 , there were approximately 2,829,000 OP units outstanding other than OP units owned by the Company. All OP units receive distributions in accordance with the LCIF partnership agreement. To the extent that the Company's dividend per common share is less than the stated distribution per OP unit per the LCIF partnership agreement, the distributions per OP unit are reduced by the percentage reduction in the Company's dividend per common share. No OP units have a liquidation preference. The following discloses the effects of changes in the Company's ownership interests in its noncontrolling interests: Net Income Attributable to Shareholders and Transfers from Noncontrolling Interests 2019 2018 2017 Net income attributable to Lexington Realty Trust shareholders $ 279,910 $ 227,415 $ 85,583 Transfers (to) from noncontrolling interests: Decrease in additional paid-in-capital for reallocation of noncontrolling interests (973 ) — — Increase in additional paid-in-capital for redemption of noncontrolling OP units 1,655 189 584 Change from net income attributable to shareholders and transfers from noncontrolling interests $ 280,592 $ 227,604 $ 86,167

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2019
Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]
Benefit Plans	Benefit Plans The Company maintains an equity award plan pursuant to which qualified and non-qualified options may be issued. No common share options were issued in 2019 , 2018 and 2017 . The Company granted 1,248,501 , 1,265,500 and 2,000,000 common share options on December 31, 2010 (“2010 options”), January 8, 2010 (“2009 options”) and December 31, 2008 (“2008 options”), respectively, at an exercise price of $7.95 , $6.39 and $5.60 , respectively. The 2010 options (1) vested 20% annually on each December 31, 2011 through 2015 and (2) terminate on the earlier of (x) six months of termination of service with the Company and (y) December 31, 2020. The 2009 options (1) vested 20% annually on each December 31, 2010 through 2014 and (2) terminated on the earlier of (x) six months of termination of service with the Company and (y) December 31, 2019. The 2008 options (1) vested 50% following a 20 -day trading period where the average closing price of a common share of the Company on the New York Stock Exchange (“NYSE”) was $8.00 or higher and vested 50% following a 20 -day trading period where the average closing price of a common share of the Company on the NYSE was $10.00 or higher, and (2) terminated on the earlier of (x) termination of service with the Company or (y) December 31, 2018. As a result of the share dividends paid in 2009, each of the 2008 options were exchangeable for approximately 1.13 common shares at an exercise price of $4.97 per common share. The Company engaged third parties to value the options as of each option's respective grant date. The third parties determined the value to be $2,422 and $2,771 for the 2010 options and 2009 options, respectively, using the Black-Scholes model and $2,480 for the 2008 options using the Monte Carlo model. The options are considered equity awards as they are settled through the issuance of common shares. As such, the options were valued as of the grant date and do not require subsequent remeasurement. There were several assumptions used to fair value the options including the expected volatility in the Company's common share price based upon the fluctuation in the Company's historical common share price. The more significant assumptions underlying the determination of fair value for options granted were as follows: 2010 Options 2009 Options 2008 Options Weighted-average fair value of options granted $ 1.94 $ 2.19 $ 1.24 Weighted-average risk-free interest rate 2.54 % 3.29 % 1.33 % Weighted-average expected option lives (in years) 6.50 6.70 3.60 Weighted-average expected volatility 49.00 % 59.08 % 59.94 % Weighted-average expected dividend yield 7.40 % 6.26 % 14.40 % The Company recognized compensation expense relating to these options over an average of 5.0 years for the 2010 options and 2009 options and 3.6 years for the 2008 options. All deferred compensation costs relating to the outstanding options were fully amortized by December 31, 2015. The intrinsic value of an option is the amount by which the market value of the underlying common share at the date the option is exercised exceeds the exercise price of the option. The total intrinsic value of options exercised for the years ended December 31, 2019 and 2018 were $271 and $26 , respectively. Share option activity during the years indicated is as follows: Number of Shares Weighted-Average Exercise Price Per Share Balance at December 31, 2017 134,790 $ 7.39 Exercised (16,390 ) 6.99 Balance at December 31, 2018 118,400 7.44 Exercised (84,400 ) 7.24 Balance at December 31, 2019 34,000 $ 7.95 As of December 31, 2019 , the aggregate intrinsic value of options that were outstanding and exercisable was $91 . Non-vested share activity for the years ended December 31, 2019 and 2018 , is as follows: Number of Shares Weighted-Average Grant-Date Fair Value Per Share Balance at December 31, 2017 3,767,298 $ 7.79 Granted 899,614 6.55 Vested (618,383 ) 9.70 Forfeited (593,452 ) 6.59 Balance at December 31, 2018 3,455,077 7.34 Granted 829,581 5.97 Vested (151,447 ) 5.06 Forfeited (1,191,799 ) 6.76 Balance at December 31, 2019 2,941,412 $ 7.30 During 2019 and 2018 , the Company granted common shares to certain employees and trustees as follows: 2019 2018 Performance Shares (1) Shares issued: Index 276,063 331,025 Peer 276,058 331,019 Grant date fair value per share: (2) Index $5.05 $5.81 Peer $4.67 $5.37 Non-Vested Common Shares: (3) Shares issued 277,460 237,570 Grant date fair value $2,270 $2,190 (1) The shares vest based on the Company's total shareholder return growth after a three -year measurement period relative to an index and a group of Company peers. Dividends will not be paid on these grants until earned. Once the performance criteria are met and the actual number of shares earned is determined, such shares vest immediately. During 2019, 713,044 of the 808,929 performance shares issued in 2016 vested. During 2018, 116,926 of the 642,029 performance shares issued in 2015 vested. (2) The fair value of grants was determined at the grant date using a Monte Carlo simulation model. (3) The shares vest ratably over a three -year service period. In addition, during 2019 , 2018 and 2017 , the Company issued 67,226 , 66,318 , and 57,334 , respectively, of fully vested common shares to non-management members of the Company's Board of Trustees with a fair value of $595 , $599 , and $596 , respectively. As of December 31, 2019 , of the remaining 2,941,412 non-vested shares, 1,274,506 are subject to time-based vesting and 1,666,906 are subject to performance-based vesting. At December 31, 2019 , there are 3,116,063 awards available for grant. The Company has $6,800 in unrecognized compensation costs relating to the non-vested shares that will be charged to compensation expense over an average of approximately 1.7 years . The Company has established a trust for certain officers in which vested common shares granted for the benefit of the officers are deposited. The officers exert no control over the common shares in the trust and the common shares are available to the general creditors of the Company. As of December 31, 2019 and 2018 , there were 130,863 and 427,531 common shares, respectively, in the trust. The Company sponsors a 401(k) retirement savings plan covering all eligible employees. The Company makes a discretionary matching contribution on a portion of employee participant salaries and, based on its profitability, may make an additional discretionary contribution at each fiscal year end to all eligible employees. These discretionary contributions are subject to vesting under a schedule providing for 25% annual vesting starting with the first year of employment and 100% vesting after four years of employment. Approximately $403 , $397 and $439 of contributions are applicable to 2019 , 2018 and 2017 , respectively. During 2019 , 2018 and 2017 , the Company recognized $5,831 , $6,901 and $8,333 , respectively, in expense relating to scheduled vesting and issuance of common share grants.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company had an indemnity obligation to Vornado Realty Trust ("VNO"), one of its significant shareholders until March 1, 2019, with respect to actions by the Company that affect VNO's status as a REIT. The indemnity obligation lapsed in 2019. All related party transactions are approved by the independent members of the Company's Board of Trustees or the Audit Committee as provided for in the Company's Code of Business Conduct and Ethics. The Company leased a property to an entity in which VNO has an interest. During 2017 , the Company recognized $234 , in rental revenue from this property. This property was sold in 2017. The Company leases its corporate office from an affiliate of VNO. Rent expense for this property was $1,128 , $1,192 and $1,179 in 2019 , 2018 and 2017 , respectively. In connection with efforts, on a non-binding basis, to procure non-recourse mezzanine financing from an affiliate of the Company's former Chairman, pursuant to the terms of the EB-5 visa program administered by the United States Citizenship and Immigration Services (“USCIS”), for a joint venture investment in Houston, Texas, in which the Company has an investment, the Company executed a guaranty in favor of an affiliate of its former Chairman. The guaranty provided that the Company will reimburse investors providing the funds for such financing if the following occurs: (1) the joint venture receives such funds, (2) the USCIS denies the financing solely because the project is not permitted under the EB-5 visa program, and (3) the joint venture fails to return such funds. During 2017, USCIS approved the project, and the guaranty terminated by its terms. In 2018, the joint venture obtained $8,500 of EB-5 mezzanine financing from an affiliate of the Company's former Chairman. The joint venture reimbursed the former Chairman's affiliate $150 for its expenses. Under an indemnity agreement, the joint venture is required to pay an affiliate of the Company's former Chairman 0.625% of the outstanding principal amount of the EB-5 mezzanine financing per annum. In addition, during 2017, the Company obtained non-recourse mezzanine financing in the initial amount of $8,000 from an affiliate of the Company's former Chairman, pursuant to the terms of the EB-5 visa program administered by the USCIS, for an investment in Charlotte, North Carolina. In January 2018, the Company obtained an additional $500 of financing proceeds. The Company reimbursed the former Chairman's affiliate approximately $105 for its expenses and paid a $128 structuring fee to the former Chairman's affiliate. The property was subsequently contributed to, and the financing assumed by, NNN JV. In 2019, the joint venture obtained an additional $1,000 of EB-5 mezzanine financing from an affiliate of the Company's former Chairman. The joint venture reimbursed the former Chairman's affiliate $15

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes relates primarily to the taxable income of the Company's taxable REIT subsidiaries. The earnings, other than in taxable REIT subsidiaries, of the Company are not generally subject to federal income taxes at the Company level due to the REIT election made by the Company. Income taxes have been provided for on the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for the temporary differences between the financial reporting basis and the tax basis of assets and liabilities. The Company's provision for income taxes for the years ended December 31, 2019 , 2018 and 2017 is summarized as follows: 2019 2018 2017 Current: Federal $ (70 ) $ (60 ) $ (107 ) State and local (1,309 ) (1,668 ) (1,810 ) $ (1,379 ) $ (1,728 ) $ (1,917 ) The income tax provision differs from the amount computed by applying the statutory federal income tax rate to pre-tax operating income as follows: 2019 2018 2017 Federal provision at statutory tax rate (21% for 2019 and 2018 and 34% for 2017) $ (73 ) $ (65 ) $ (182 ) State and local taxes, net of federal benefit (10 ) (11 ) (40 ) Other (1,296 ) (1,652 ) (1,695 ) $ (1,379 ) $ (1,728 ) $ (1,917 ) For the years ended December 31, 2019 , 2018 and 2017 , the “other” amount is comprised primarily of state franchise taxes of $1,289 , $1,679 and $1,598 , respectively. A summary of the average taxable nature of the Company's common dividends for each of the years in the three -year period ended December 31, 2019 , is as follows: 2019 2018 2017 Total dividends per share $ 0.485 $ 0.710 $ 0.700 Ordinary income 61.07 % 87.89 % 59.93 % Qualifying dividend 0.22 % 0.14 % 0.15 % Capital gain — — — Return of capital 38.71 % 11.97 % 39.92 % 100.00 % 100.00 % 100.00 % A summary of the average taxable nature of the Company's dividend on shares of its Series C Preferred for each of the years in the three -year period ended December 31, 2019 , is as follows: 2019 2018 2017 Total dividends per share $ 3.25 $ 3.25 $ 3.25 Ordinary income 99.64 % 99.84 % 99.75 % Qualifying dividend 0.36 % 0.16 % 0.25 Capital gain — — — Return of capital — — — 100.00 % 100.00 % 100.00 %

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In addition to the commitments and contingencies disclosed elsewhere, the Company has the following commitments and contingencies. The Company is obligated under certain tenant leases, including its proportionate share for leases for non-consolidated entities, to fund the expansion of the underlying leased properties. The Company, under certain circumstances, may guarantee to tenants the completion of base building improvements and the payment of tenant improvement allowances and lease commissions on behalf of its subsidiaries. The Company had four development projects as of December 31, 2019, which are described in "Properties" in Part I, Item 2 of this Annual Report. Due to the early stage of development of each project and the uncertainty of construction schedules at such stage, the Company is unable to estimate the timing of the required fundings for development projects. The Company and LCIF are parties to a funding agreement under which the Company may be required to fund distributions made on account of LCIF's OP units. Pursuant to the funding agreement, the parties agreed that, if LCIF does not have sufficient cash available to make a quarterly distribution to its limited partners in an amount in accordance with the partnership agreement, Lexington will fund the shortfall. Payments under the agreement will be made in the form of loans to LCIF and will bear interest at prevailing rates as determined by the Company in its discretion but, no less than the applicable federal rate. LCIF's right to receive these loans will expire if no OP units remain outstanding and all such loans are repaid. No amounts have been advanced under this agreement. From time to time, the Company is directly or indirectly involved in legal proceedings arising in the ordinary course of business. Management believes, based on currently available information, and after consultation with legal counsel, that although the outcomes of those normal course proceedings are uncertain, the results of such proceedings, in the aggregate, will not have a material adverse effect on the Company's business, financial condition and results of operations. Cummins Inc. v. Lexington Columbus (Jackson Street) L.P. and Wells Fargo Trust Company, N.A. (State of Indiana, County of Bartholomew, in the Bartholomew Superior Court). On October 25, 2018, Cummins Inc., the tenant in the Columbus, Indiana office building, filed a complaint for declaratory relief against Lexington Columbus (Jackson Street) L.P. (“Lex Columbus”), the Company's property owner subsidiary, and Wells Fargo Trust Company, N.A., the trustee for the noteholders with a security interest in the office building. Despite failing to timely provide notice of intent to exercise a $5,000 purchase option for the office building that was expressly due by July 15, 2018, where time was of the essence, Cummins Inc. asked the court for a declaration that it is entitled to purchase the building at the option price and to terminate the lease effective July 31, 2019. Cummins Inc. did not dispute that it failed to comply with the requirements of the purchase option, but alleged that it is entitled to relief under several equitable theories. Under the subject lease, as a result of the failure of Cummins Inc. to exercise its purchase option and to give notice of non-renewal, Cummins Inc.’s tenancy extended through July 31, 2024, with options to further extend for additional time periods. On December 19, 2019, Lex Columbus sold its interest in the Columbus, Indiana office building to Cummins Inc. for a gross purchase price of $46,915 and terminated the Cummins lease as part of a settlement of the litigation. At the closing of the sale, Cummins Inc. paid rent for the period August 1, 2019 through December 18, 2019 in the amount of $1,885 and reimbursed Lex Columbus for $700 in expenses under the indemnity provision in the lease. The litigation was dismissed with prejudice on December 20, 2019. As of December 31, 2019, the Company maintained an executive severance policy and entered into related agreements with certain of its executive officers whereby the Company's executives are entitled to severance benefits upon certain events. In January 2018, the Company entered into retirement agreements with two of its then executive officers. One of the retirement agreements provides for contingent payments, not to exceed $795 , in 2020 following the receipt of certain incentive fees by the Company, if any. As of December 31, 2019, $140 of these contingent payments was earned.

Supplemental Disclosure of Stat

Supplemental Disclosure of Statement of Cash Flow Information	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Supplemental Disclosure of Statement of Cash Flow Information	Supplemental Disclosure of Statement of Cash Flow Information 2019 2018 2017 Reconciliation of cash, cash equivalents and restricted cash: Cash and cash equivalents at beginning of period $ 168,750 $ 107,762 $ 86,637 Restricted cash at beginning of period 8,497 4,394 31,142 Cash, cash equivalents and restricted cash at beginning of period $ 177,247 $ 112,156 $ 117,779 Cash and cash equivalents at end of period $ 122,666 $ 168,750 $ 107,762 Restricted cash at end of period 6,644 8,497 4,394 Cash, cash equivalents and restricted cash at end of period $ 129,310 $ 177,247 $ 112,156 In addition to disclosures discussed elsewhere, during 2019 , 2018 and 2017 , the Company paid $59,018 , $76,562 and $75,069 , respectively, for interest and $1,482 , $2,025 and $2,340 , respectively, for income taxes. During 2019, the Company assumed a $41,877 non-recourse mortgage debt upon the acquisition of a property. In addition, in 2019, the Company sold its interest in a property, which included the assumption by the buyer of the related non-recourse mortgage debt of $110,000 . During 2017 , the Company conveyed its interests in certain properties to its lenders in full satisfaction of $12,616 non-recourse mortgage notes payable.

Unaudited Quarterly Financial D

Unaudited Quarterly Financial Data	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Financial Data	Unaudited Quarterly Financial Data 3/31/2019 6/30/2019 9/30/2019 12/31/2019 Total gross revenues $ 81,248 $ 80,135 $ 81,550 $ 83,036 Net income $ 28,280 $ 23,769 $ 147,821 $ 85,423 Net income attributable to common shareholders $ 26,405 $ 21,721 $ 141,560 $ 83,574 Net income attributable to common shareholders - basic per share $ 0.11 $ 0.09 $ 0.60 $ 0.34 Net income attributable to common shareholders - diluted per share $ 0.11 $ 0.09 $ 0.59 $ 0.33 3/31/2018 6/30/2018 9/30/2018 12/31/2018 Total gross revenues $ 102,821 $ 105,673 $ 100,295 $ 88,182 Net income (loss) $ (14,823 ) $ (795 ) $ 220,850 $ 25,674 Net income (loss) attributable to common shareholders $ (15,957 ) $ (3,327 ) $ 216,190 $ 23,796 Net income (loss) attributable to common shareholders - basic per share $ (0.07 ) $ (0.01 ) $ 0.91 $ 0.10 Net income (loss) attributable to common shareholders - diluted per share $ (0.07 ) $ (0.01 ) $ 0.90 $ 0.10

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Subsequent to December 31, 2019 and in addition to disclosures elsewhere in the financial statements, the Company: – acquired four industrial properties for an aggregate purchase price of approximately $195,000 , partially funded through borrowings on the revolving credit facility.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation. The Company's consolidated financial statements are prepared on the accrual basis of accounting in accordance with U.S. generally accepted accounting principles (“GAAP”). The financial statements reflect the accounts of the Company and its consolidated subsidiaries. The Company consolidates its wholly-owned subsidiaries, partnerships and joint ventures which it controls (i) through voting rights or similar rights or (ii) by means other than voting rights if the Company is the primary beneficiary of a variable interest entity ("VIE"). Entities which the Company does not control and entities which are VIEs in which the Company is not the primary beneficiary are accounted for under appropriate GAAP.
Earnings Per Share	Earnings Per Share . Basic net income (loss) per share is computed by dividing net income (loss) reduced by preferred dividends and amounts allocated to certain non-vested share-based payment awards, if applicable, by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share amounts are similarly computed but include the effect, when dilutive, of in-the-money common share options and non-vested common shares, OP units and put options of certain convertible securities.
Use of Estimates	Use of Estimates. Management has made a number of significant estimates and assumptions relating to the reporting of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses to prepare these consolidated financial statements in conformity with GAAP. These estimates and assumptions are based on management's best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the economic environment. Management adjusts such estimates when facts and circumstances dictate. The most significant estimates made include the recoverability of accounts receivable, allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed, the determination of VIEs and which entities should be consolidated, the determination of impairment of long-lived assets and equity method investments, valuation of derivative financial instruments, valuation of awards granted under compensation plans, the determination of the incremental borrowing rate for leases where the Company is the lessee and the useful lives of long-lived assets. Actual results could differ materially from those estimates.
Revenue Recognition	Revenue Recognition. The Company recognizes lease revenue on a straight-line basis over the term of the lease unless another systematic and rational basis is more representative of the time pattern in which the use benefit is derived from the leased property. Revenue is recognized on a contractual basis for leases with escalations tied to a consumer price index with no floor. Renewal options in leases with rental terms that are lower than those in the primary term are excluded from the calculation of straight-line rent if the renewals are not reasonably assured. If the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. If the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition when possession or control of the space is turned over to the tenant for tenant work to begin. The lease incentive is recorded as a deferred expense and amortized as a reduction of revenue on a straight-line basis over the respective lease term. The Company recognizes lease termination fees as rental revenue in the period received and writes off unamortized lease-related intangible and other lease-related account balances, provided there are no further Company obligations under the lease. Otherwise, such fees and balances are recognized on a straight-line basis over the remaining obligation period with the termination payments being recorded as a component of rent receivable-deferred on the Consolidated Balance Sheets.
Acquisition of Real Estate	Acquisition of Real Estate. The fair value of the real estate acquired, which includes the impact of fair value adjustments for assumed mortgage debt related to property acquisitions, is allocated to the acquired tangible assets, consisting of land, building and improvements and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, other value of in-place leases and value of tenant relationships, based in each case on their fair values. Prior to January 1, 2018, acquisition and pursuit costs were expensed as incurred and were included in property operating expense in the accompanying Consolidated Statement of Operations, which were $2,171 for 2017. Effective January 1, 2018, the Company's acquisitions are primarily considered asset acquisitions and acquisition costs are now capitalized. The fair value of the tangible assets of an acquired property (which includes land, building and improvements and fixtures and equipment) is determined by valuing the property as if it were vacant. The “as-if-vacant” value is then allocated to land and building and improvements based on management's determination of relative fair values of these assets. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue during the expected lease-up periods based on current market demand. Management also estimates costs to execute similar leases including leasing commissions. Management generally retains a third party to assist in the allocations. In allocating the fair value of the identified intangible assets and liabilities of an acquired property, above-market and below-market lease values are recorded based on the difference between the current in-place lease rent and management's estimate of current market rents. Below-market lease intangibles are recorded as part of deferred revenue and amortized into rental revenue over the non-cancelable periods and bargain renewal periods of the respective leases. Above-market leases are recorded as part of intangible assets and amortized as a direct charge against rental revenue over the non-cancelable portion of the respective leases. The aggregate value of other acquired intangible assets, consisting of in-place leases and tenant relationship values, is measured by the excess of (1) the purchase price paid for a property over (2) the estimated fair value of the property as if vacant, determined as set forth above. This aggregate value is allocated between in-place lease values and tenant relationship values based on management's evaluation of the specific characteristics of each tenant's lease. The value of in-place leases is amortized to expense over the remaining non-cancelable periods and any bargain renewal periods of the respective leases. The value of tenant relationships is amortized to expense over the applicable lease term plus expected renewal periods. Depreciation is determined by the straight-line method over the remaining estimated economic useful lives of the properties. The Company generally depreciates its real estate assets over periods ranging up to 40 years .
Impairment of Real Estate	Impairment of Real Estate. The Company evaluates the carrying value of all tangible and intangible real estate assets held for investment for possible impairment when an event or change in circumstance has occurred that indicates its carrying value may not be recoverable. The Company considers the strategic decisions regarding the future plans to sell properties and other market factors. The Company regularly updates significant estimates and assumptions including rental rates, capitalization rates and discount rates, which are included in the anticipated future undiscounted cash flows derived from the asset. If such cash flows are less than the asset's carrying value, an impairment charge is recognized to the extent by which the asset's carrying value exceeds its estimated fair value, which may be below the balance of any non-recourse financing. Estimating future cash flows and fair values is highly subjective and such estimates could differ materially from actual results.
Investments in Non-Consolidated Entities	Investments in Non-Consolidated Entities . The Company accounts for its investments in 50% or less owned entities under the equity method, unless consolidation is required. If the Company's investment in the entity is insignificant and the Company has no influence over the control of the entity then the entity is accounted for under the cost method.
Impairment of Equity Method Investments	Impairment of Equity Method Investments. The Company assesses whether there are indicators that the value of its equity method investments may be impaired. An impairment charge is recognized only if the Company determines that a decline in the value of the investment below its carrying value is other-than-temporary. The assessment of impairment is highly subjective and involves the application of significant assumptions and judgments about the Company's intent and ability to recover its investment given the nature and operations of the underlying investment, including the level of the Company's involvement therein, among other factors. To the extent an impairment is deemed to be other-than-temporary, the loss is measured as the excess of the carrying amount of the investment over the estimated fair value of the investment.
Fair Value Measurements	Fair Value Measurements. The Company follows the guidance in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 820, Fair Value Measurements and Disclosures ("Topic 820"), to determine the fair value of financial and non-financial instruments. Topic 820 defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements. Topic 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: Level 1 - quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities; Level 2 - observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and Level 3 - unobservable inputs, which are used when little or no market data is available. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as considering counterparty credit risk. The Company has formally elected to apply the portfolio exception within Topic 820 with respect to measuring counterparty risk for all of its derivative transactions subject to master netting arrangements. The Company estimates the fair value of its real estate assets, including non-consolidated real estate assets, by using income and market valuation techniques. The Company may estimate fair values using market information such as recent sale contracts (Level 2 inputs) or recent sale offers or discounted cash flow models, which primarily rely on Level 3 inputs. The cash flow models include estimated cash inflows and outflows over a specified holding period. These cash flows may include contractual rental revenues, projected future rental revenues and expenses and forecasted tenant improvements and lease commissions based upon market conditions determined through discussion with local real estate professionals, experience the Company has with its other owned properties in such markets and expectations for growth. Capitalization rates and discount rates utilized in these models are estimated by management based upon rates that management believes to be within a reasonable range of current market rates for the respective properties based upon an analysis of factors such as property and tenant quality, geographical location and local supply and demand observations. To the extent the Company under-estimates forecasted cash outflows (tenant improvements, lease commissions and operating costs) or over-estimates forecasted cash inflows (rental revenue rates), the estimated fair value of its real estate assets could be overstated.
Acquisition, Development and Construction Arrangements	Acquisition, Development and Construction Arrangements. The Company evaluates loans receivable where the Company participates in residual profits through loan provisions or other contracts to ascertain whether the Company has the same risks and rewards as an owner or a joint venture partner. Where the Company concludes that such arrangements are more appropriately treated as an investment in real estate, the Company reflects such loan receivable as an equity investment in real estate under construction in the Consolidated Balance Sheets. In these cases, no interest income is recorded on the loan receivable and the Company records capitalized interest during the construction period. In arrangements where the Company engages a developer to construct a property or provide funds to a tenant to develop a property, the Company will capitalize the funds provided to the developer/tenant and internal costs of interest and real estate taxes, if applicable, during the construction period.
Properties Held For Sale	Properties Held For Sale. Assets and liabilities of properties that meet various held for sale criteria, including whether it is probable that a sale will occur within 12 months, are presented separately in the Consolidated Balance Sheets. The operating results of these properties are reflected as discontinued operations in the Consolidated Statements of Operations only if the sale of these assets represents a strategic shift in operations; if not, the operating results are included in continuing operations. Properties classified as held for sale are carried at the lower of net carrying value or estimated fair value less costs to sell and depreciation and amortization are no longer recognized. Properties that do not meet the held for sale criteria are accounted for as operating properties.
Deferred Expenses	Deferred Expenses. Deferred expenses consist primarily of revolving line of credit debt and leasing costs. Debt costs are amortized using the straight-line method, which approximates the interest method, over the terms of the debt instruments and leasing costs are amortized over the term of the related lease.
Derivative Financial Instruments	Derivative Financial Instruments . The Company accounts for its interest rate swap agreements in accordance with FASB ASC Topic 815, Derivatives and Hedging ("Topic 815"). In accordance with Topic 815, these agreements are carried on the balance sheet at their respective fair values, as an asset if fair value is positive, or as a liability if fair value is negative. If the interest rate swap is designated as a cash flow hedge, the portion of the interest rate swap's change in fair value is reported as a component of other comprehensive income (loss). Upon entering into hedging transactions, the Company documents the relationship between the interest rate swap agreement and the hedged item. The Company also documents its risk-management policies, including objectives and strategies, as they relate to its hedging activities. The Company assesses, both at inception of a hedge and on an ongoing basis, whether or not the hedge is highly effective. The Company will discontinue hedge accounting on a prospective basis with changes in the estimated fair value reflected in earnings when (1) it is determined that the derivative is no longer effective in offsetting cash flows of a hedged item (including forecasted transactions), (2) it is no longer probable that the forecasted transaction will occur or (3) it is determined that designating the derivative as an interest rate swap is no longer appropriate. The Company does and may continue to utilize interest rate swap and cap agreements to manage interest rate risk, but does not anticipate entering into derivative transactions for speculative trading purposes.
Stock Compensation	Stock Compensation. The Company maintains an equity participation plan. Non-vested share grants generally vest either based upon (1) time, (2) performance and/or (3) market conditions. Options granted under the plan in 2010 vested over a five -year period and expire ten years
Tax Status	Tax Status. The Company has made an election to qualify, and believes it is operating so as to qualify, as a REIT for federal income tax purposes. Accordingly, the Company generally will not be subject to federal income tax, provided that distributions to its shareholders equal at least the amount of its REIT taxable income as defined under Sections 856 through 860 of the Code. The Company is permitted to participate in certain activities from which it was previously precluded in order to maintain its qualification as a REIT, so long as these activities are conducted in entities which elect to be treated as taxable REIT subsidiaries under the Code. As such, the Company is subject to federal and state income taxes on the income from these activities. Income taxes, primarily related to the Company's taxable REIT subsidiaries, are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled.
Cash and Cash Equivalents	Cash and Cash Equivalents. The Company considers all highly liquid instruments with maturities of three months or less from the date of purchase to be cash equivalents.
Restricted Cash	Restricted Cash. Restricted cash is comprised primarily of cash balances held in escrow by lenders.
Environmental Matters	Environmental Matters.
Segment Reporting	Segment Reporting. The Company operates generally in one industry segment, single-tenant real estate assets.
Reclassification	Reclassifications
Recently Issued Accounting Guidance	New Accounting Standards Adopted in 2019. In June 2018, the FASB issued Accounting Standard Update (“ASU”) No. 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which aligns the measurement and classification guidance for share-based payments to nonemployees with the guidance for share-based payments to employees, with certain exceptions. The Company adopted this guidance effective January 1, 2019 on a prospective basis. The Company's adoption of this guidance did not have a material impact on its financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, which amends the hedge accounting recognition and presentation requirements in Topic 815. The ASU is effective for reporting periods beginning after December 15, 2018. The Company adopted this guidance effective January 1, 2019 on a prospective basis. The Company's adoption of this guidance did not have a material impact on its financial statements. Additionally, the Company adopted ASU No. 2016-02, Leases (Topic 842) effective January 1, 2019. Topic 842 requires lessees to recognize lease assets and lease liabilities on the balance sheet for those leases previously classified as operating leases. The Company adopted Topic 842 using the modified retrospective transition approach with January 1, 2019 as the Company's date of initial application, thus periods prior to January 1, 2019 conform to ASC Topic 840. The Company has elected other practical expedients permitted under the transition guidance including: • a package of practical expedients that allows the Company to carryforward its assessment of whether a contract is or contains a lease, whether costs incurred qualify as initial direct costs, and historical lease classification for any leases that existed prior to the adoption; • to account for lease and non-lease components as a single component if the (i) timing and patterns of transfer are the same for the lease and non-lease component and (ii) related lease component and the combined single lease component would be classified as an operating lease; • to exclude from the consideration in the contract and variable lease payments all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from the lessee. Taxes assessed on the Company’s total gross receipts are excluded from this accounting policy election; • to not assess if existing land easements in place prior to adoption meet the definition of a lease; and • to not recognize leases with a term of 12 months or less on the balance sheet. The Company did not elect the hindsight practical expedient to determine lease term. The adoption of Topic 842 required the Company to record right-of-use assets and lease liabilities on the Company's Consolidated Balance Sheet. The Company did not recognize a cumulative adjustment to equity upon adoption. The adoption of this guidance did not have a material impact on the Company's Consolidated Statement of Operations and Consolidated Statement of Cash Flows. See note 11, “Leases” for further disclosures. Recently Issued Accounting Guidance. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward-looking “expected loss” model that generally will result in the earlier recognition of an allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of the reported amount. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019. The Company analyzed its accounts receivable using an aging methodology and determined that there have been no historical credit losses related its outstanding accounts receivable. The adoption of this guidance on January 1, 2020 did not have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40). This ASU addresses customer’s accounting for implementation costs incurred in a cloud computing arrangement that is a service contract and also adds certain disclosure requirements related to implementation costs incurred for internal-use software and cloud computing arrangements. The amendment aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The standard is effective for fiscal years beginning after December 15, 2019. The adoption of this guidance on January 1, 2020, did not have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “ Fair Value Measurement (Topic 820) .” ASU 2018-13 amends certain disclosure requirements regarding the fair value hierarchy of investments in accordance with GAAP, particularly the significant unobservable inputs used to value investments within Level 3 of the fair value hierarchy. The standard is effective on January 1, 2020, with early adoption permitted. The Company does not expect the adoption of ASU 2018-13 to have a material impact on the Company's consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of Variable Interest Entities	Below is a summary of selected financial data of consolidated VIEs for which the Company is the primary beneficiary included in the Consolidated Balance Sheets as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 Real estate, net $ 592,372 $ 509,916 Total assets $ 645,623 $ 607,963 Mortgages and notes payable, net $ 82,978 $ 192,791 Total liabilities $ 101,901 $ 203,322

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share Reconciliation	The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2019 : 2019 2018 2017 BASIC Net income attributable to common shareholders $ 273,225 $ 220,838 $ 79,067 Weighted-average number of common shares outstanding 237,642,048 236,666,375 237,758,408 Net income attributable to common shareholders - per common share basic $ 1.15 $ 0.93 $ 0.33 DILUTED: Net income attributable to common shareholders - basic $ 273,225 $ 220,838 $ 79,067 Impact of assumed conversions — 2,528 147 Net income attributable to common shareholders $ 273,225 $ 223,366 $ 79,214 Weighted-average common shares outstanding - basic 237,642,048 236,666,375 237,758,408 Effect of dilutive securities: Unvested share-based payment awards and options 292,467 528,495 86,285 Operating Partnership Units — 3,616,120 3,693,144 Weighted-average common shares outstanding - diluted 237,934,515 240,810,990 241,537,837 Net income attributable to common shareholders - per common share diluted $ 1.15 $ 0.93 $ 0.33

Investments in Real Estate (Tab

Investments in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2019
Real Estate Investments, Net [Abstract]
Schedule of Net Real Estate	The Company's real estate, net, consists of the following at December 31, 2019 and 2018 : 2019 2018 Real estate, at cost: Buildings and building improvements $ 2,962,982 $ 2,746,446 Land, land estates and land improvements 355,697 341,848 Construction in progress 1,895 1,840 Real estate intangibles: In-place lease values 339,154 331,607 Tenant relationships 42,396 54,662 Above-market leases 28,206 33,343 Investments in real estate under construction 13,313 — 3,743,643 3,509,746 Accumulated depreciation and amortization (1) (887,629 ) (954,087 ) Real estate, net $ 2,856,014 $ 2,555,659 (1) Includes accumulated amortization of real estate intangible assets of $212,033 and $231,443 in 2019 and 2018 , respectively. The estimated amortization of the above real estate intangible assets for the next five years is $28,634 in 2020 , $26,647 in 2021 , $24,640 in 2022 , $23,487 in 2023 and $18,270 in 2024 .
Schedule of Acquired Properties	The Company completed the following acquisitions during 2019 and 2018 : 2019 : Real Estate Intangibles Property Type Market Acquisition Date Initial Cost Basis Lease Expiration Land Building and Improvements Lease in-place Value Intangible Below Market Lease Intangible Industrial Indianapolis, IN January 2019 $ 20,809 07/2025 $ 1,954 $ 16,820 $ 2,035 $ — Industrial Atlanta, GA February 2019 37,182 10/2023 3,253 30,951 2,978 — Industrial Dallas, TX April 2019 28,201 08/2023 2,420 23,330 2,451 — Industrial Greenville/Spartanburg, SC April 2019 33,253 01/2024 1,615 27,829 3,809 — Industrial Memphis, TN May 2019 49,395 04/2024 2,646 40,452 6,297 — Industrial Memphis, TN May 2019 18,316 05/2023 851 15,465 2,000 — Industrial Atlanta, GA June 2019 45,441 05/2020 3,251 40,023 2,167 — Industrial Atlanta, GA June 2019 27,353 05/2024 2,536 22,825 1,992 — Industrial Cincinnati, OH September 2019 13,762 12/2023 544 12,376 842 — Industrial Cincinnati, OH September 2019 100,288 06/2030 3,950 88,427 7,911 — Industrial Cincinnati, OH September 2019 65,763 08/2027 3,123 60,703 5,392 (3,455 ) Industrial Greenville/Spartanburg, SC October 2019 16,817 01/2024 1,406 14,272 1,139 — Industrial Greenville/Spartanburg, SC October 2019 15,583 04/2025 1,257 13,252 1,074 — Industrial Phoenix, AZ October 2019 21,020 09/2026 3,311 16,013 1,696 — Industrial Phoenix, AZ November 2019 67,079 09/2030 11,970 48,924 6,185 — Industrial Chicago, IL December 2019 49,348 09/2029 3,432 40,947 4,969 — Industrial Greenville/Spartanburg, SC December 2019 94,233 12/2034 6,959 78,364 8,910 — $ 703,843 $ 54,478 $ 590,973 $ 61,847 $ (3,455 ) Weighted-average life of intangible assets (years) 8.4 8.0 In 2019, the Company invested $3,225 in a 23.6 -acre land parcel in the Columbus, Ohio market and commenced construction of a 320,000 square foot warehouse/distribution facility. Also in 2019, the Company acquired an interest in a newly-formed joint venture, ATL Fairburn JV, LLC, that invested $10,088 in an 81 -acre land parcel in the Atlanta, Georgia market to construct a 910,000 square foot warehouse/distribution facility. The Company has a 90% interest in the joint venture and consolidates the joint venture. 2018 : Real Estate Intangibles Property Type Location Acquisition Date Initial Lease Expiration Land and Land Estate Building and Improvements Lease in-place Value Intangible Below Market Lease Intangible Industrial Olive Branch, MS April 2018 $ 44,090 07/2029 $ 1,958 $ 38,687 $ 3,445 $ — Industrial Olive Branch, MS April 2018 48,575 06/2021 2,500 42,538 5,151 (1,614 ) Industrial Edwardsville, IL June 2018 44,178 05/2030 3,649 41,292 3,467 (4,230 ) Industrial Spartanburg, SC August 2018 27,632 07/2024 1,447 23,744 2,441 — Industrial Pasadena, TX August 2018 23,868 08/2023 4,057 17,810 2,001 — Industrial Carrollton, TX September 2018 19,564 12/2033 3,228 15,766 1,247 (677 ) Industrial Goodyear, AZ November 2018 41,372 04/2026 5,247 36,115 2,014 (2,004 ) Industrial Chester, VA December 2018 66,311 06/2030 8,544 53,067 6,832 (2,132 ) $ 315,590 $ 30,630 $ 269,019 $ 26,598 $ (10,657 ) Weighted-average life of intangible assets (years) 8.4 9.4 In addition, the Company acquired a 57 -acre parcel of land from a non-consolidated joint venture and leased the parcel to a tenant that is developing a distribution facility.

Dispositions and Impairment (Ta

Dispositions and Impairment (Tables)	12 Months Ended
	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Assets and Liabilities of Held for Sale Properties	Assets and liabilities of the held for sale properties as of December 31, 2018 consisted of the following: December 31, 2018 Assets: Real estate, at cost $ 63,639 Real estate, intangible assets 14,498 Accumulated depreciation and amortization (16,873 ) Rent receivable - deferred 2,439 Other 165 $ 63,868 Liabilities: Other $ 386 $ 386

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measurement Inputs	The following tables present the Company's assets and liabilities measured at fair value on a recurring and non-recurring basis as of December 31, 2019 and 2018 , aggregated by the level in the fair value hierarchy within which those measurements fall: Fair Value Measurements Using Description 2019 (Level 1) (Level 2) (Level 3) Interest rate swap liabilities $ (1,928 ) $ — $ (1,928 ) $ — Impaired real estate assets* $ 4,846 $ — $ — $ 4,846 Fair Value Measurements Using Description 2018 (Level 1) (Level 2) (Level 3) Interest rate swap assets $ 76 $ — $ 76 $ — Impaired real estate assets* $ 35,036 $ — $ — $ 35,036 *Represents a non-recurring fair value measurement. Fair value as of the date of impairment.
Schedule of Carrying Amounts and Fair Value of Financial Instruments	The table below sets forth the carrying amounts and estimated fair values of the Company's financial instruments as of December 31, 2019 and 2018 : As of December 31, 2019 As of December 31, 2018 Carrying Amount Fair Value Carrying Amount Fair Value Liabilities Debt $ 1,311,977 $ 1,276,589 $ 1,492,483 $ 1,409,773

Investments in Non-Consolidat_2

Investments in Non-Consolidated Entities Investments in Non-Consolidated Entities (Tables)	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investments in and Advances to Affiliates	Below is a schedule of the Company's investments in non-consolidated entities: Percentage Ownership at Investment Balance as of Investment December 31, 2019 December 31, 2019 December 31, 2018 NNN JV (1) 20% $ 39,288 $ 53,144 Etna Park 70 LLC (2) 90% 8,352 4,774 Etna Park 70 East LLC (3) 90% 4,310 — Other (4) 15% to 25% 5,218 8,265 $ 57,168 $ 66,183 (1) During 2018, the Company disposed of 21 office assets to NNN JV for an aggregate gross disposition price of $725,800 and acquired a 20% interest in NNN JV. Two of the 21 properties, with a combined estimated fair value of $45,653 , were contributed to NNN JV along with cash of $8,053 . The Company recognized a gain of $14,645 in connection with the contribution of the two office assets to NNN JV, and in addition, NNN JV assumed an aggregate of $103,400 of non-recourse mortgage debt in the transaction. NNN JV obtained an aggregate of $362,800 of non-recourse mortgage financing which bears interest at LIBOR plus 200 basis points and has an initial term of three years but can be extended for two additional terms of one -year each. There is a rate increase of 15 basis points upon each extension. NNN JV entered into interest rate agreements which cap the LIBOR component of the $362,800 mortgage financing at 4.0% for two years . (2) Joint venture formed in 2017 with a developer entity to acquire a 151 -acre parcel of developable land and pursue industrial build-to-suit opportunities. The Company determined it is not the primary beneficiary. In December 2018, the parcel was subdivided and the Company received a distribution of an ownership interest in a 57 -acre parcel with a historical cost of $3,008 . The Company acquired control of the parcel via the purchase of the Company's joint venture partners' interest. (3) Joint venture formed in 2019 with a developer entity to acquire a 129.6 -acre parcel of developable land and pursue industrial build-to-suit opportunities. The Company determined it is not the primary beneficiary. (4) At December 31, 2019 , represents one joint venture investment, which owns a single-tenant, net-leased asset.

Mortgages and Notes Payable (Ta

Mortgages and Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The Company had the following mortgages and notes payable outstanding as of December 31, 2019 and 2018 : December 31, 2019 December 31, 2018 Mortgages and notes payable $ 393,872 $ 575,514 Unamortized debt issuance costs (3,600 ) (5,094 ) $ 390,272 $ 570,420
Schedule of Line of Credit Facilities	A summary of the significant terms, as of December 31, 2019 , are as follows: Maturity Date Interest Rate $600,000 Revolving Credit Facility (1) February 2023 LIBOR + 0.90% $300,000 Term Loan (1)(2) January 2025 LIBOR + 1.00%
Schedule of Maturities of Long-term Debt	Scheduled principal and balloon payments for mortgages, notes payable and term loan for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ 71,099 2021 36,597 2022 18,564 2023 20,136 2024 13,856 Thereafter 533,620 693,872 Unamortized debt issuance costs (6,161 ) $ 687,711 Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 129,120 629,120 Unamortized debt discounts (963 ) Unamortized debt issuance costs (3,891 ) $ 624,266

Senior Notes, Convertible Not_2

Senior Notes, Convertible Notes and Trust Preferred Securities (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt Instrument Redemption	The Company had the following Senior Notes outstanding as of December 31, 2019 and 2018 : Issue Date December 31, 2019 December 31, 2018 Interest Rate Maturity Date Issue Price May 2014 $ 250,000 $ 250,000 4.40 % June 2024 99.883 % June 2013 250,000 250,000 4.25 % June 2023 99.026 % 500,000 500,000 Unamortized debt discount (963 ) (1,235 ) Unamortized debt issuance cost (2,167 ) (2,731 ) $ 496,870 $ 496,034
Schedule of Maturities of Long-term Debt	Scheduled principal and balloon payments for mortgages, notes payable and term loan for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ 71,099 2021 36,597 2022 18,564 2023 20,136 2024 13,856 Thereafter 533,620 693,872 Unamortized debt issuance costs (6,161 ) $ 687,711 Scheduled principal payments for these debt instruments for the next five years and thereafter are as follows: Year ending December 31, Total 2020 $ — 2021 — 2022 — 2023 250,000 2024 250,000 Thereafter 129,120 629,120 Unamortized debt discounts (963 ) Unamortized debt issuance costs (3,891 ) $ 624,266

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	As of December 31, 2019 , the Company had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk: Interest Rate Derivative Number of Instruments Notional Interest Rate Swaps 4 $300,000
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The table below presents the fair value of the Company's derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of December 31, 2019 and 2018 . As of December 31, 2019 As of December 31, 2018 Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments: Interest Rate Swap Asset/Liability Other liabilities $ (1,928 ) Other assets $ 76
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The table below present the effect of the Company's derivative financial instruments on the Consolidated Statements of Operations for 2019 and 2018 : Derivatives in Cash Flow Amount of Income (Loss) Recognized Location of Income Reclassified from Accumulated OCI into Income Amount of Income Hedging Relationships 2019 2018 2019 2018 Interest Rate Swap $ (1,625 ) $ 597 Interest expense $ (379 ) $ (1,586 )

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Lease Income	The following table presents the Company’s classification of rental revenue for its operating leases for the year ended December 31, 2019 : Classification Fixed Variable (1) Total Rental revenue $ 291,892 $ 28,730 $ 320,622 (1) Primarily comprised of tenant reimbursements.
Lessor, Operating Lease, Payments to be Received, Maturity	Future fixed rental receipts for leases, assuming no new or re-negotiated leases as of December 31, 2019 were as follows: 2020 $ 269,701 2021 258,937 2022 245,527 2023 242,009 2024 210,765 Thereafter 1,399,068 Total $ 2,626,007 The above minimum lease payments do not include reimbursements to be received from tenants for certain operating expenses and real estate taxes and do not include early termination payments provided for in certain leases, if not reasonably assured. Certain leases allow for the tenant to terminate the lease if the property is deemed obsolete, as defined, and upon payment of a termination fee to the landlord, as stipulated in the lease. In addition, certain leases provide the tenant with the right to purchase the leased property at fair market value or a stipulated price. Minimum future lease payments under the non-cancellable portion of tenant leases, assuming no new or re-negotiated leases, for the next five years and thereafter in accordance with ASC Topic 840 as of December 31, 2018 were as follows: Year ending December 31, Total 2019 $ 270,557 2020 253,660 2021 233,192 2022 212,893 2023 211,387 Thereafter 1,619,848 $ 2,801,537
Assets and Liabilities, Lessee	Supplemental information related to operating leases as of December 31, 2019 is as follows: Weighted-average remaining lease term Operating leases (years) 12.3 Weighted-average discount rate Operating leases 4.1 %
Lease, Cost	The components of lease expense for the year ended December 31, 2019 were as follows: Income Statement Classification Fixed Variable Total Property operating $ 3,982 $ — $ 3,982 General and administrative 1,343 112 1,455 Total $ 5,325 $ 112 $ 5,437
Lessee, Operating Lease, Liability, Maturity	The following table shows the Company's maturity analysis of its operating lease liabilities as of December 31, 2019 : Operating Leases 2020 $ 5,236 2021 5,060 2022 5,135 2023 5,279 2024 5,301 Thereafter 25,621 Total lease payments $ 51,632 Less: Imputed interest (12,190 ) Present value of lease liabilities $ 39,442
Future Minimum Rental Payments	The following table shows the Company's future minimum lease rental payments under non-cancellable leasehold interests in accordance with ASC Topic 840 as of December 31, 2018: Year ending December 31, Total 2019 $ 3,826 2020 3,827 2021 3,769 2022 3,834 2023 4,008 Thereafter 28,326 $ 47,590

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income Loss	A summary of the changes in accumulated other comprehensive income (loss) related to the Company's cash flow hedges is as follows: Twelve months ended December 31, 2019 2018 Balance at beginning of period $ 76 $ 1,065 Other comprehensive income (loss) before reclassifications (1,625 ) 597 Amounts of income reclassified from accumulated other comprehensive income (loss) to interest expense (379 ) (1,586 ) Balance at end of period $ (1,928 ) $ 76
Effects of Changes in the Company's Ownership Interests in Noncontrolling Interests	The following discloses the effects of changes in the Company's ownership interests in its noncontrolling interests: Net Income Attributable to Shareholders and Transfers from Noncontrolling Interests 2019 2018 2017 Net income attributable to Lexington Realty Trust shareholders $ 279,910 $ 227,415 $ 85,583 Transfers (to) from noncontrolling interests: Decrease in additional paid-in-capital for reallocation of noncontrolling interests (973 ) — — Increase in additional paid-in-capital for redemption of noncontrolling OP units 1,655 189 584 Change from net income attributable to shareholders and transfers from noncontrolling interests $ 280,592 $ 227,604 $ 86,167

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The more significant assumptions underlying the determination of fair value for options granted were as follows: 2010 Options 2009 Options 2008 Options Weighted-average fair value of options granted $ 1.94 $ 2.19 $ 1.24 Weighted-average risk-free interest rate 2.54 % 3.29 % 1.33 % Weighted-average expected option lives (in years) 6.50 6.70 3.60 Weighted-average expected volatility 49.00 % 59.08 % 59.94 % Weighted-average expected dividend yield 7.40 % 6.26 % 14.40 %
Schedule of Share-based Compensation, Stock Options, Activity	Share option activity during the years indicated is as follows: Number of Shares Weighted-Average Exercise Price Per Share Balance at December 31, 2017 134,790 $ 7.39 Exercised (16,390 ) 6.99 Balance at December 31, 2018 118,400 7.44 Exercised (84,400 ) 7.24 Balance at December 31, 2019 34,000 $ 7.95
Schedule of Nonvested Share Activity	Non-vested share activity for the years ended December 31, 2019 and 2018 , is as follows: Number of Shares Weighted-Average Grant-Date Fair Value Per Share Balance at December 31, 2017 3,767,298 $ 7.79 Granted 899,614 6.55 Vested (618,383 ) 9.70 Forfeited (593,452 ) 6.59 Balance at December 31, 2018 3,455,077 7.34 Granted 829,581 5.97 Vested (151,447 ) 5.06 Forfeited (1,191,799 ) 6.76 Balance at December 31, 2019 2,941,412 $ 7.30
Schedule of Share-based Compensation, Activity	During 2019 and 2018 , the Company granted common shares to certain employees and trustees as follows: 2019 2018 Performance Shares (1) Shares issued: Index 276,063 331,025 Peer 276,058 331,019 Grant date fair value per share: (2) Index $5.05 $5.81 Peer $4.67 $5.37 Non-Vested Common Shares: (3) Shares issued 277,460 237,570 Grant date fair value $2,270 $2,190 (1) The shares vest based on the Company's total shareholder return growth after a three -year measurement period relative to an index and a group of Company peers. Dividends will not be paid on these grants until earned. Once the performance criteria are met and the actual number of shares earned is determined, such shares vest immediately. During 2019, 713,044 of the 808,929 performance shares issued in 2016 vested. During 2018, 116,926 of the 642,029 performance shares issued in 2015 vested. (2) The fair value of grants was determined at the grant date using a Monte Carlo simulation model. (3) The shares vest ratably over a three

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The Company's provision for income taxes for the years ended December 31, 2019 , 2018 and 2017 is summarized as follows: 2019 2018 2017 Current: Federal $ (70 ) $ (60 ) $ (107 ) State and local (1,309 ) (1,668 ) (1,810 ) $ (1,379 ) $ (1,728 ) $ (1,917 )
Statutory Accounting Practices Disclosure	The income tax provision differs from the amount computed by applying the statutory federal income tax rate to pre-tax operating income as follows: 2019 2018 2017 Federal provision at statutory tax rate (21% for 2019 and 2018 and 34% for 2017) $ (73 ) $ (65 ) $ (182 ) State and local taxes, net of federal benefit (10 ) (11 ) (40 ) Other (1,296 ) (1,652 ) (1,695 ) $ (1,379 ) $ (1,728 ) $ (1,917 )
Summary of Average Taxable Nature of Dividends	A summary of the average taxable nature of the Company's common dividends for each of the years in the three -year period ended December 31, 2019 , is as follows: 2019 2018 2017 Total dividends per share $ 0.485 $ 0.710 $ 0.700 Ordinary income 61.07 % 87.89 % 59.93 % Qualifying dividend 0.22 % 0.14 % 0.15 % Capital gain — — — Return of capital 38.71 % 11.97 % 39.92 % 100.00 % 100.00 % 100.00 % A summary of the average taxable nature of the Company's dividend on shares of its Series C Preferred for each of the years in the three -year period ended December 31, 2019 , is as follows: 2019 2018 2017 Total dividends per share $ 3.25 $ 3.25 $ 3.25 Ordinary income 99.64 % 99.84 % 99.75 % Qualifying dividend 0.36 % 0.16 % 0.25 Capital gain — — — Return of capital — — — 100.00 % 100.00 % 100.00 %

Supplemental Disclosure of St_2

Supplemental Disclosure of Statement of Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	2019 2018 2017 Reconciliation of cash, cash equivalents and restricted cash: Cash and cash equivalents at beginning of period $ 168,750 $ 107,762 $ 86,637 Restricted cash at beginning of period 8,497 4,394 31,142 Cash, cash equivalents and restricted cash at beginning of period $ 177,247 $ 112,156 $ 117,779 Cash and cash equivalents at end of period $ 122,666 $ 168,750 $ 107,762 Restricted cash at end of period 6,644 8,497 4,394 Cash, cash equivalents and restricted cash at end of period $ 129,310 $ 177,247 $ 112,156

Unaudited Quarterly Financial_2

Unaudited Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	3/31/2019 6/30/2019 9/30/2019 12/31/2019 Total gross revenues $ 81,248 $ 80,135 $ 81,550 $ 83,036 Net income $ 28,280 $ 23,769 $ 147,821 $ 85,423 Net income attributable to common shareholders $ 26,405 $ 21,721 $ 141,560 $ 83,574 Net income attributable to common shareholders - basic per share $ 0.11 $ 0.09 $ 0.60 $ 0.34 Net income attributable to common shareholders - diluted per share $ 0.11 $ 0.09 $ 0.59 $ 0.33 3/31/2018 6/30/2018 9/30/2018 12/31/2018 Total gross revenues $ 102,821 $ 105,673 $ 100,295 $ 88,182 Net income (loss) $ (14,823 ) $ (795 ) $ 220,850 $ 25,674 Net income (loss) attributable to common shareholders $ (15,957 ) $ (3,327 ) $ 216,190 $ 23,796 Net income (loss) attributable to common shareholders - basic per share $ (0.07 ) $ (0.01 ) $ 0.91 $ 0.10 Net income (loss) attributable to common shareholders - diluted per share $ (0.07 ) $ (0.01 ) $ 0.90 $ 0.10

- The Company (Details)

- The Company (Details)	Dec. 31, 2019Propertystate
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of consolidated properties | Property	130
Number of states in which entity has interests | state	31

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Line Items]
Acquisition Costs Expensed			$ 2,171
Vesting period (in years)	5 years
Expiration period of options (in years)	10 years
Number of operating segments | segment	1
Rental revenue	$ 320,622	$ 395,339	391,641
NNN Office Joint Venture
Property, Plant and Equipment [Line Items]
VIE, ownership percentage	90.00%
Accounting Standards Update 2018-11
Property, Plant and Equipment [Line Items]
Rental revenue		$ 30,608	$ 31,809
Building and Building Improvements
Property, Plant and Equipment [Line Items]
Maximum useful life of PPE (in years)	40 years
Variable Interest Entity, Primary Beneficiary
Property, Plant and Equipment [Line Items]
VIE, ownership percentage	96.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Real estate, net	$ 2,856,014	$ 2,555,659
Total assets	3,180,260	2,953,840
Mortgages and notes payable, net	390,272	570,420
Total liabilities	1,455,541	1,607,162
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate, net	592,372	509,916
Total assets	645,623	607,963
Mortgages and notes payable, net	82,978	192,791
Total liabilities	$ 101,901	$ 203,322

- Earnings Per Share (Details)

- Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
BASIC
Net income attributable to common shareholders	$ 83,574	$ 141,560	$ 21,721	$ 26,405	$ 23,796	$ 216,190	$ (3,327)	$ (15,957)	$ 273,225	$ 220,838	$ 79,067
Weighted-average common shares outstanding - basic (in shares)									237,642,048	236,666,375	237,758,408
Net income attributable to common shareholders - basic (usd per share)	$ 0.34	$ 0.60	$ 0.09	$ 0.11	$ 0.10	$ 0.91	$ (0.01)	$ (0.07)	$ 1.15	$ 0.93	$ 0.33
DILUTED:
Impact of assumed conversions									$ 0	$ 2,528	$ 147
Net income attributable to common shareholders									$ 273,225	$ 223,366	$ 79,214
Weighted-average common shares outstanding - basic (in shares)									237,642,048	236,666,375	237,758,408
Effect of dilutive securities:
Unvested share-based payment awards and options (in shares)									292,467	528,495	86,285
Operating Partnership Units (in shares)									0	3,616,120	3,693,144
Weighted-average common shares outstanding (in shares)									237,934,515	240,810,990	241,537,837
Net income (loss) attributable to common shareholders - per common share diluted (usd per share)	$ 0.33	$ 0.59	$ 0.09	$ 0.11	$ 0.10	$ 0.90	$ (0.01)	$ (0.07)	$ 1.15	$ 0.93	$ 0.33

Investments in Real Estate - S

Investments in Real Estate - Schedule of Net Real Estate (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate [Line Items]
Buildings and building improvements	$ 2,962,982	$ 2,746,446
Land, land estates and land improvements	355,697	341,848
Construction in progress	1,895	1,840
Real estate - intangible assets	409,756	419,612
Investments in real estate under construction	13,313	0
Real estate, gross	3,743,643	3,509,746
Accumulated depreciation and amortization	(887,629)	(954,087)
Real estate, net	2,856,014	2,555,659
Accumulated amortization	212,033	231,443
Amortization expense, next 12 months	28,634
Amortization expense, year 2	26,647
Amortization expense, year 3	24,640
Amortization expense, year 4	23,487
Amortization expense, year 5	18,270
In-place lease values
Real Estate [Line Items]
Real estate - intangible assets	339,154	331,607
Tenant relationships
Real Estate [Line Items]
Real estate - intangible assets	42,396	54,662
Above-market leases
Real Estate [Line Items]
Real estate - intangible assets	$ 28,206	$ 33,343

Investments in Real Estate - A

Investments in Real Estate - Additional Information (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)aft²	Dec. 31, 2018USD ($)
Real Estate [Line Items]
Below-market leases, net of accretion	$ 19,090	$ 17,923
Future accretion, year 1	2,550
Future accretion, year 2	2,210
Future accretion, year 3	1,931
Future accretion, year 4	1,931
Future accretion, year 5	$ 1,931
Area of Real Estate Property | a	57
ALT Fairburn JV
Real Estate [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	90.00%
Columbus, Ohio
Real Estate [Line Items]
Payments to acquire land	$ 3,225
Area of Real Estate Property | a	23.6
Speculative Distribution Facility | ft²	320
ALT Fairburn JV
Real Estate [Line Items]
Area of Real Estate Property | a	81
Speculative Distribution Facility | ft²	910
Payments to Acquire Businesses and Interest in Affiliates	$ 10,088

Investments in Real Estate -_2

Investments in Real Estate - Schedule of Acquired Properties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Real Estate [Line Items]
Initial Cost Basis	$ 703,843	$ 315,590
Land and Land Estate	54,478	30,630
Building and Improvements	590,973	269,019
Lease in-place Value	61,847	26,598
Below Market Lease	$ (3,455)	$ (10,657)
In-place lease values
Real Estate [Line Items]
Weighted-average life of intangible assets (years)	8 years 4 months 24 days	8 years 4 months 24 days
Leases, Acquired-in-Place, Market Adjustment [Member]
Real Estate [Line Items]
Weighted-average life of intangible assets (years)	8 years	9 years 4 months 24 days
Office Property | Olive Branch, Mississippi | Olive Branch, Mississippi, Industrial Property Expiring 2029
Real Estate [Line Items]
Initial Cost Basis		$ 44,090
Land and Land Estate		1,958
Building and Improvements		38,687
Lease in-place Value		3,445
Below Market Lease		0
Office Property | Spartanburg, South Carolina
Real Estate [Line Items]
Land and Land Estate		1,447
Building and Improvements		23,744
Lease in-place Value		2,441
Below Market Lease		0
Office Property | Spartanburg, South Carolina | Spartanburg, SC Property Expiring July 2024
Real Estate [Line Items]
Initial Cost Basis		27,632
Industrial Property | Olive Branch, Mississippi | Olive Branch, Mississippi, Industrial Property Expiring 2021
Real Estate [Line Items]
Initial Cost Basis		48,575
Land and Land Estate		2,500
Building and Improvements		42,538
Lease in-place Value		5,151
Below Market Lease		(1,614)
Industrial Property | Edwardsville, Illinois | Edwardsville, IL Industrial Property Expiring 2030
Real Estate [Line Items]
Initial Cost Basis		44,178
Land and Land Estate		3,649
Building and Improvements		41,292
Lease in-place Value		3,467
Below Market Lease		(4,230)
Industrial Property | Pasadena, Texas | Pasadena, TX Industrial Property Expiring 2023
Real Estate [Line Items]
Initial Cost Basis		23,868
Land and Land Estate		4,057
Building and Improvements		17,810
Lease in-place Value		2,001
Below Market Lease		0
Industrial Property | Carrollton, Texas | Carrollton, Texas
Real Estate [Line Items]
Initial Cost Basis		19,564
Land and Land Estate		3,228
Building and Improvements		15,766
Lease in-place Value		1,247
Below Market Lease		(677)
Industrial Property | Goodyear, Arizona | Goodyear, Arizona Industrial Property Expiring 2026
Real Estate [Line Items]
Initial Cost Basis		41,372
Land and Land Estate		5,247
Building and Improvements		36,115
Lease in-place Value		2,014
Below Market Lease		(2,004)
Industrial Property | Chester, Virginia
Real Estate [Line Items]
Land and Land Estate		8,544
Industrial Property | Chester, Virginia | Chester, VA Industrial Property Expiring 2030
Real Estate [Line Items]
Initial Cost Basis		66,311
Building and Improvements		53,067
Lease in-place Value		6,832
Below Market Lease		$ (2,132)
Indianapolis, Indiana | Industrial Property | Indianapolis, IN, Industrial Property Expiring 2025
Real Estate [Line Items]
Initial Cost Basis	$ 20,809
Land and Land Estate	1,954
Building and Improvements	16,820
Lease in-place Value	2,035
Atlanta, Georgia | Industrial Property | Atlanta, GA Property Expiring 2023
Real Estate [Line Items]
Initial Cost Basis	37,182
Land and Land Estate	3,253
Building and Improvements	30,951
Lease in-place Value	2,978
Atlanta, Georgia | Industrial Property | Atlanta, GA Industrial Property Expiring 2020
Real Estate [Line Items]
Initial Cost Basis	45,441
Land and Land Estate	3,251
Building and Improvements	40,023
Lease in-place Value	2,167
Atlanta, Georgia | Industrial Property | Atlanta, GA Industrial Property Expiring 2024
Real Estate [Line Items]
Initial Cost Basis	27,353
Land and Land Estate	2,536
Building and Improvements	22,825
Lease in-place Value	1,992
Cincinnati, Ohio | Industrial Property | Cincinnati, Ohio, Industrial Property Expiring 2023
Real Estate [Line Items]
Initial Cost Basis	13,762
Land and Land Estate	544
Building and Improvements	12,376
Lease in-place Value	842
Cincinnati, Ohio | Industrial Property | Cincinnati, Ohio, Industrial Property Expiring 2030
Real Estate [Line Items]
Initial Cost Basis	100,288
Land and Land Estate	3,950
Building and Improvements	88,427
Lease in-place Value	7,911
Cincinnati, Ohio | Industrial Property | Cincinnati, Ohio, Industrial Property Expiring 2027
Real Estate [Line Items]
Initial Cost Basis	65,763
Land and Land Estate	3,123
Building and Improvements	60,703
Lease in-place Value	5,392
Below Market Lease	(3,455)
Dallas, Texas | Industrial Property | Dallas, TX Property Expiring 2023
Real Estate [Line Items]
Initial Cost Basis	28,201
Land and Land Estate	2,420
Building and Improvements	23,330
Lease in-place Value	2,451
Greenville/Spartanburg, South Carolina | Industrial Property | Greenville/Spartanburg, SC Property Expiring 2024
Real Estate [Line Items]
Initial Cost Basis	33,253
Land and Land Estate	1,615
Building and Improvements	27,829
Lease in-place Value	3,809
Greenville/Spartanburg, South Carolina | Industrial Property | Greenville/Spartanburg, SC Property Expiring July 2024
Real Estate [Line Items]
Initial Cost Basis	16,817
Land and Land Estate	1,406
Building and Improvements	14,272
Lease in-place Value	1,139
Greenville/Spartanburg, South Carolina | Industrial Property | Greenville/Spartanburg, SC Industrial Property Expiring 2025
Real Estate [Line Items]
Initial Cost Basis	15,583
Land and Land Estate	1,257
Building and Improvements	13,252
Lease in-place Value	1,074
Greenville/Spartanburg, South Carolina | Industrial Property | Greenville/Spartanburg, SC Industrial Property Expiring 2034
Real Estate [Line Items]
Initial Cost Basis	94,233
Land and Land Estate	6,959
Building and Improvements	78,364
Lease in-place Value	8,910
Memphis, Tennessee | Industrial Property | Memphis, Tennessee, Industrial Property Expiring 2024
Real Estate [Line Items]
Initial Cost Basis	49,395
Land and Land Estate	2,646
Building and Improvements	40,452
Lease in-place Value	6,297
Memphis, Tennessee | Industrial Property | Memphis, Tennessee, Industrial Property Expiring 2023
Real Estate [Line Items]
Initial Cost Basis	18,316
Land and Land Estate	851
Building and Improvements	15,465
Lease in-place Value	2,000
Phoenix, Arizona | Industrial Property | Phoenix, AZ Industrial Property Expiring 2026
Real Estate [Line Items]
Initial Cost Basis	21,020
Land and Land Estate	3,311
Building and Improvements	16,013
Lease in-place Value	1,696
Phoenix, Arizona | Industrial Property | Phoenix, AZ Industrial Property Expiring 2030
Real Estate [Line Items]
Initial Cost Basis	67,079
Land and Land Estate	11,970
Building and Improvements	48,924
Lease in-place Value	6,185
Chicago, Illinois | Industrial Property | Chicago, IL Industrial Property Expiring 2029
Real Estate [Line Items]
Initial Cost Basis	49,348
Land and Land Estate	3,432
Building and Improvements	40,947
Lease in-place Value	$ 4,969

Dispositions and Impairment - A

Dispositions and Impairment - Additional Information (Details) $ in Thousands	1 Months Ended			9 Months Ended	12 Months Ended
	Feb. 28, 2019USD ($)	Dec. 31, 2018Propertyproperty	Feb. 28, 2017USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)Property	Dec. 31, 2018USD ($)buildingProperty	Dec. 31, 2017USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property					$ 504,118	$ 898,514	$ 223,853
Aggregate gain on sale of properties					250,889	252,913	63,428
Gain (loss) on debt extinguishment on sale of properties					$ (4,415)	$ (1,698)	5,938
Properties classified as held-for-sale (in number of properties) | Property		2			0	2
Other asset impairment charges					$ 5,329	$ 95,813	39,702
Impairment charges and loan losses					2,974	36,620
Impairment losses related to real estate partnerships			$ 5,294
Office Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate gain on sale of properties			$ 1,777
Number of properties sold | property		6
Asset impairment charges						23,496	15,008
NNN Office Joint Venture Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate gain on sale of properties	$ 824				3,529
NNN Office Joint Venture Properties | Transferred Property | Office Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of property						$ 725,800
Number of properties sold | building						21
Watertown, New York
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges					$ 2,106		$ 18,023
Albany, Georgia
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges				$ 249

Dispositions and Impairment - S

Dispositions and Impairment - Schedule of Properties Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Real estate, at cost		$ 63,639
Real estate, intangible assets		14,498
Accumulated depreciation and amortization		(16,873)
Rent receivable - deferred		2,439
Other		165
Assets held for sale	$ 0	63,868
Other		386
Liabilities held for sale	$ 0	$ 386

Fair Value Measurements - Sche

Fair Value Measurements - Schedule of Fair Value Measurements Inputs (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities	$ (1,928)
Interest rate swap assets		$ 76
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired real estate assets	4,846	35,036
Fair Value Measurements Using Level 1 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities	0
Interest rate swap assets		0
Fair Value Measurements Using Level 1 | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired real estate assets	0	0
Fair Value Measurements Using Level 2 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities	(1,928)
Interest rate swap assets		76
Fair Value Measurements Using Level 2 | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired real estate assets	0	0
Fair Value Measurements Using Level 3 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities	0
Interest rate swap assets		0
Fair Value Measurements Using Level 3 | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired real estate assets	$ 4,846	$ 35,036

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value, by Balance Sheet Grouping (Details) - Fair Value Measurements Using Level 3 - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Carrying Amount
Liabilities
Debt, Carrying Amount	$ 1,311,977	$ 1,492,483
Fair Value
Liabilities
Debt, Fair Value	$ 1,276,589	$ 1,409,773

Investments in Non-Consolidat_3

Investments in Non-Consolidated Entities - Schedule of Investments in and Non-consolidated Entities (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2018USD ($)atermproperty	Dec. 31, 2019USD ($)aoffice_assetpartnership	Dec. 31, 2018USD ($)abuildingterm	Dec. 31, 2017USD ($)a
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 66,183	$ 57,168	$ 66,183
Proceeds from sale of property		504,118	898,514	$ 223,853
Real estate, at cost	3,090,134	$ 3,320,574	3,090,134
Mortgages | NNN Office Joint Venture
Schedule of Equity Method Investments [Line Items]
Non-recourse debt	$ 362,800		$ 362,800
Long-term debt, term	3 years		3 years
Number of additional extensions available | term	2		2
Term of additional extensions			1 year
Term of contract			2 years
Mortgages | NNN Office Joint Venture | London Interbank Offered Rate (LIBOR)
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate			200.00%
Basis spread rate increase per extension			15.00%
Cap interest rate	4.00%		4.00%
Office Building
Schedule of Equity Method Investments [Line Items]
Number of properties sold | property	6
NNN Office Joint Venture Properties | Office Building | Transferred Property
Schedule of Equity Method Investments [Line Items]
Number of properties sold | building			21
Proceeds from sale of property			$ 725,800
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage		15.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage		25.00%
NNN Office Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage	20.00%	20.00%	20.00%
Etna Park 70
Schedule of Equity Method Investments [Line Items]
Ownership percentage		90.00%
Etna Park 70 East LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage		90.00%
Etna Park 70
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 4,774	$ 8,352	$ 4,774
Etna Park 70 East LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	0	4,310	0
Other Joint Ventures
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 8,265	$ 5,218	$ 8,265
Number of joint venture interests | partnership		1
Etna GL 66 LLC
Schedule of Equity Method Investments [Line Items]
Area of land (in acres) | a	57	129.6	57	151
Real estate, at cost	$ 3,008		$ 3,008
NNN Office Joint Venture
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 53,144	$ 39,288	53,144
NNN Office Joint Venture | NNN Office Joint Venture Properties
Schedule of Equity Method Investments [Line Items]
Number of properties sold | office_asset		4
NNN Office Joint Venture | 2 of 21 Transferred Properties
Schedule of Equity Method Investments [Line Items]
Contribution of property			45,653
Payments to acquire interest in joint venture			8,053
Gain (loss) on disposition of assets			14,645
Transfer mortgage payable			$ 103,400

Investments in Non-Consolidat_4

Investments in Non-Consolidated Entities - Additional Information (Details)	1 Months Ended			12 Months Ended
	Feb. 28, 2019USD ($)	Dec. 31, 2018USD ($)property	Feb. 28, 2017USD ($)	Dec. 31, 2019USD ($)office_asset	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Feb. 01, 2019	Jan. 31, 2017
Investments in and Advances to Affiliates [Line Items]
Aggregate gain on sale of properties				$ 250,889,000	$ 252,913,000	$ 63,428,000
Proceeds from sale of property				504,118,000	898,514,000	223,853,000
Distribution of net proceeds				2,571,000	2,083,000	403,000
Impairment charges and loan losses				2,974,000	36,620,000
Investments						0
Investment advisory fees				5,347,000	1,632,000	1,049,000
Lexington Reality Advisors Inc | Investment Advice
Investments in and Advances to Affiliates [Line Items]
Investment advisory fees				$ 3,596,000	$ 1,443,000	807,000
Palm Beach Gardens, Florida
Investments in and Advances to Affiliates [Line Items]
Impairment charges and loan losses						$ 3,512,000
Oklahoma City, Oklahoma | Tenant-in-Common
Investments in and Advances to Affiliates [Line Items]
Co-venture equity ownership percentage								40.00%
Proceeds from divestiture of interest in joint venture			$ 6,198,000
Aggregate gain on sale of properties			1,452,000
Office Building
Investments in and Advances to Affiliates [Line Items]
Proceeds from divestiture of interest in joint venture	$ 2,317,000	$ 4,312,000
Aggregate gain on sale of properties			$ 1,777,000
Number of properties sold | property		6
Non-consolidated Real Estate Entity
Investments in and Advances to Affiliates [Line Items]
Co-venture equity ownership percentage							15.00%
NNN Office Joint Venture
Investments in and Advances to Affiliates [Line Items]
Co-venture equity ownership percentage		20.00%		20.00%	20.00%
NNN Office Joint Venture Properties
Investments in and Advances to Affiliates [Line Items]
Aggregate gain on sale of properties	$ 824,000			$ 3,529,000
Mortgages | NNN Office Joint Venture
Investments in and Advances to Affiliates [Line Items]
Non-recourse debt		$ 362,800,000			$ 362,800,000
NNN Office Joint Venture
Investments in and Advances to Affiliates [Line Items]
Proceeds received				45,208,000
Distribution of net proceeds				$ 7,549,000
NNN Office Joint Venture | NNN Office Joint Venture Properties
Investments in and Advances to Affiliates [Line Items]
Number of properties sold | office_asset				4
NNN Office Joint Venture | Mortgages
Investments in and Advances to Affiliates [Line Items]
Extinguishment of debt				$ 101,520,000

Mortgages and Notes Payable - S

Mortgages and Notes Payable - Schedule of Mortgages and Notes Payable (Details) - Mortgages and Notes Payable - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Mortgages and notes payable	$ 393,872	$ 575,514
Unamortized debt issuance costs	(3,600)	(5,094)
Long-term debt	$ 390,272	$ 570,420

Mortgages and Notes Payable - A

Mortgages and Notes Payable - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2019USD ($)
Debt Instrument [Line Items]
Debt Instrument, Debt Default, Number of Loans | loan	2
Debt satisfaction gains (charges), net	$ (4,517)	$ (2,596)	$ 6,196
Interest paid, capitalized	$ 410	$ 15	1,174
Debt Instrument, Debt Default, Amount				$ 38,942
Mortgages and Notes Payable
Debt Instrument [Line Items]
Weighted-average interest rate	4.50%	4.50%
Debt satisfaction gains (charges), net	$ (9)	$ (898)	$ 258
Minimum | Mortgages and Notes Payable
Debt Instrument [Line Items]
Debt interest rate percentage	3.50%
Effective interest percentage		2.20%
Maximum | Mortgages and Notes Payable
Debt Instrument [Line Items]
Debt interest rate percentage	6.50%
Effective interest percentage		6.50%

Mortgages and Notes Payable - C

Mortgages and Notes Payable - Credit Agreement Terms (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Aug. 01, 2019	Jul. 31, 2019	Feb. 28, 2019	Jan. 31, 2019
Debt Instrument [Line Items]
Debt satisfaction gains (charges), net		$ (4,517,000)	$ (2,596,000)	$ 6,196,000
Unsecured Term Loan
Debt Instrument [Line Items]
Debt issuance costs, gross		2,561,000	$ 1,267,000
Unsecured Revolving Credit Facility, Expiring August 2019 | Revolving Credit Facility
Debt Instrument [Line Items]
Face amount		600,000,000
Line of credit maximum borrowing capacity							$ 600,000,000
Debt satisfaction gains (charges), net	$ (93,000)
Revolving credit facility borrowings		0
Line of credit remaining borrowing capacity		600,000,000						$ 505,000,000
Unsecured Term Loan, Expiring January 2025 | Unsecured Term Loan
Debt Instrument [Line Items]
Debt interest rate percentage						2.732%
Unsecured Term Loan, Expiring January 2021 | Unsecured Term Loan
Debt Instrument [Line Items]
Face amount		$ 300,000,000
London Interbank Offered Rate (LIBOR) | Unsecured Revolving Credit Facility, Expiring August 2019 | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate stated percentage rate range minimum excluding LIBOR		0.90%
London Interbank Offered Rate (LIBOR) | Unsecured Term Loan, Expiring January 2021 | Unsecured Term Loan
Debt Instrument [Line Items]
Interest rate stated percentage rate range minimum excluding LIBOR		1.00%
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Debt Instrument [Line Items]
Derivative notional amount		$ 300,000,000			$ 300,000,000	$ 300,000,000

Mortgages and Notes Payable - M

Mortgages and Notes Payable - Maturities of Long-term Debt (Details) - Mortgages, Notes Payable, Credit Facility Borrowings, and Term Loans $ in Thousands	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
2020	$ 71,099
2021	36,597
2022	18,564
2023	20,136
2024	13,856
Thereafter	533,620
Long-term debt, gross	693,872
Unamortized debt issuance costs	(6,161)
Long-term debt	$ 687,711

Senior Notes, Convertible Not_3

Senior Notes, Convertible Notes and Trust Preferred Securities - Schedule of Long-term Debt Instruments (Details) - Senior Notes - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal amount of debt component	$ 500,000,000	$ 500,000,000
Unamortized debt discounts	(963,000)	(1,235,000)
Unamortized debt issuance costs	(2,167,000)	(2,731,000)
Long-term debt	496,870,000	496,034,000
Senior Notes Due 2024
Debt Instrument [Line Items]
Principal amount of debt component	$ 250,000,000	250,000,000
Debt interest rate percentage	4.40%
Issue Price	99.883%
Senior Notes Due 2023
Debt Instrument [Line Items]
Principal amount of debt component	$ 250,000,000	$ 250,000,000
Debt interest rate percentage	4.25%
Issue Price	99.026%

Senior Notes, Convertible Not_4

Senior Notes, Convertible Notes and Trust Preferred Securities - Narrative (Details) - 6.804% Trust Preferred Securities - USD ($)	12 Months Ended
	Dec. 31, 2007	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Face amount	$ 200,000,000
Debt interest rate percentage	6.804%
Effective interest percentage		3.636%
Principal amount outstanding on Trust Preferred Securities		$ 129,120,000	$ 129,120,000
Debt issuance costs, gross		$ 1,724,000	$ 1,824,000
London Interbank Offered Rate (LIBOR)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Basis spread on variable rate	1.70%

Senior Notes, Convertible Not_5

Senior Notes, Convertible Notes and Trust Preferred Securities - Schedule of Maturities of Long-term Debt (Details) - Senior Notes, Convertible Notes, and Trust Preferred Securities $ in Thousands	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
2020	$ 0
2021	0
2022	0
2023	250,000
2024	250,000
Thereafter	129,120
Long-term debt, gross	629,120
Unamortized debt discounts	(963)
Unamortized debt issuance costs	(3,891)
Long-term debt	$ 624,266

- Derivatives and Hedging Activ

- Derivatives and Hedging Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)Financial_Instrument	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Aug. 01, 2019USD ($)	Jul. 31, 2019USD ($)derivative_instrument
Derivative [Line Items]
Amount reclassified as increase to interest expense					$ 366
Interest expense	$ 65,095	$ 79,880	$ 77,883
Interest Rate Swap | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Derivative asset	$ (1,928)	76
Cash Flow Hedging | Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Number of derivative instruments held	4				4
Derivative notional amount	$ 300,000			$ 300,000	$ 300,000
Cash Flow Hedging | Interest Rate Swap | Designated as Hedging Instrument | Interest Expense
Derivative [Line Items]
Amount of Gain (Loss) recognized in OCI on Derivative	(1,625)	597
Amount of (Income) Loss Reclassified from AOCI into Income	$ (379)	$ (1,586)

Leases - Additional information

Leases - Additional information (Details) - USD ($) $ in Thousands	Dec. 19, 2019	Dec. 18, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Aug. 31, 2019
Lessee, Lease, Description [Line Items]
Receivable reduced			$ 352
Rental revenue not recognized							$ 1,100
Rent expense			320,622
Non incremental costs incurred			$ 191
Remaining lease term			43 years
Renewal term			53 years
Sublease Income			$ 3,764
Impairment of Leasehold				$ 597	$ 690
Minimum
Lessee, Lease, Description [Line Items]
Renewal term						5 years
Maximum
Lessee, Lease, Description [Line Items]
Renewal term						10 years
Settled Litigation | Cummins Inc. V Lexington Columbus L.P. And Wells Fargo Trust Company
Lessee, Lease, Description [Line Items]
Purchase price	$ 46,915
Rent expense		$ 1,885
Operating lease, reimbursed expenses		$ 700

Leases - Lease Income (Details)

Leases - Lease Income (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Fixed	$ 291,892
Variable	28,730
Total	$ 320,622

Leases - Future Fixed Rental Re

Leases - Future Fixed Rental Receipts (Details) $ in Thousands	Dec. 31, 2019USD ($)
Leases [Abstract]
2020	$ 269,701
2021	258,937
2022	245,527
2023	242,009
2024	210,765
Thereafter	1,399,068
Total	$ 2,626,007

Leases - Minimum Future Rentals

Leases - Minimum Future Rentals Under Topic 840 (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 270,557
2020	253,660
2021	233,192
2022	212,893
2023	211,387
Thereafter	1,619,848
Total	$ 2,801,537

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details)	Dec. 31, 2019
Leases [Abstract]
Weighted-average remaining lease term, operating leases (years)	12 years 3 months 18 days
Weighted-average discount rate, operating leases	4.10%

Leases - Components of Leases E

Leases - Components of Leases Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Fixed	$ 5,325
Variable	112
Total	5,437
Operating Expense
Lessee, Lease, Description [Line Items]
Fixed	3,982
Variable	0
Total	3,982
General and Administrative Expense
Lessee, Lease, Description [Line Items]
Fixed	1,343
Variable	112
Total	$ 1,455

Leases - Operating Lease Liabil

Leases - Operating Lease Liabilities Maturity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
2020	$ 5,236
2021	5,060
2022	5,135
2023	5,279
2024	5,301
Thereafter	25,621
Total lease payments	51,632
Less: Imputed interest	(12,190)
Operating lease liabilities	39,442
2020	3,826
2021	3,827
2022	3,769
2023	3,834
2024	4,008
Thereafter	28,326
Rent expense	1,312	$ 1,274	$ 1,256
Building
Lessee, Lease, Description [Line Items]
2020	1,296
2021	1,325
2022	1,335
2023	1,305
2024	1,305
Thereafter	$ 1,631

Leases - Operating Lease Liab_2

Leases - Operating Lease Liabilities Maturity Under Topic 840 (Details) (Details) $ in Thousands	Dec. 31, 2019USD ($)
Leases [Abstract]
2019	$ 3,826
2020	3,827
2021	3,769
2022	3,834
2023	4,008
Thereafter	28,326
Future Minimum Payments Due	$ 47,590

Equity - Additional Informatio

Equity - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)shares	Jul. 31, 2015shares
Equity [Line Items]
Common stock, shares, issued	254,770,719	235,008,554
Proceeds from issuance of common shares | $	$ 197,643,000	$ (2,818,000)	$ 16,804,000
Preferred shares outstanding (in shares)	1,935,400	1,935,400
Shares issued, net of forfeitures (in shares)	896,807	965,932	835,234
Remaining authorized repurchase amount | $	$ 10,306,255
OP unit equivalent in common shares (in unit per share)	1.13
Shares issued for units redeemed (in shares)	391,993	53,388	140,746
Partners' capital account, exchanges and conversions | $	$ 1,655,000	$ 189,000	$ 584,000
OP units outstanding (in units)	2,829,000
Unsettled repurchases | $		$ 2,641,000
Common Stock
Equity [Line Items]
Number of shares authorized to be repurchased (in shares)		10,000,000		10,000,000
Repurchase of common shares (in shares)	441,581	5,851,252	0
Average cost per share (usd per share) | $ / shares	$ 8.13	$ 8.05
Series C
Equity [Line Items]
Preferred shares outstanding (in shares)	1,935,400
Dividend rate (usd per share) | $ / shares	$ 3.25
Preferred shares, liquidation preference | $	$ 96,770,000
Preferred shares to common shares conversion ratio	2.4339
Series C | Minimum
Equity [Line Items]
Common share closing price percent of conversion price	125.00%
At The Market
Equity [Line Items]
Common stock, shares, issued	9,668,748	0	1,593,603
Proceeds from issuance of common shares | $	$ 102,299,000		$ 17,362,000
Sale of stock, amount available for issuance | $	$ 296,076,000
Underwritten Offering
Equity [Line Items]
Common stock, shares, issued	10,000,000
Proceeds from issuance of common shares | $	$ 100,749,000
Underwritten Offering | Common Stock
Equity [Line Items]
Shares issued, price per share | $ / shares	$ 10.09

Equity - Schedule of Changes i

Equity - Schedule of Changes in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Changes in Accumulated Other Comprehensive Income
Balance at beginning of period	$ 1,346,678	$ 1,340,835
Balance at end of period	1,724,719	1,346,678
Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income
Balance at beginning of period	76	1,065
Balance at end of period	(1,928)	76
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Changes in Accumulated Other Comprehensive Income
Other comprehensive income (loss) before reclassifications	(1,625)
Amounts of income reclassified from accumulated other comprehensive income (loss) to interest expense	$ (379)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Changes in Accumulated Other Comprehensive Income
Other comprehensive income (loss) before reclassifications		597
Amounts of income reclassified from accumulated other comprehensive income (loss) to interest expense		$ (1,586)

Equity - Schedule of Effects o

Equity - Schedule of Effects of Changes in Noncontrolling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Net income (loss) attributable to common shareholders	$ 279,910	$ 227,415	$ 85,583
Decrease in additional paid-in-capital for reallocation of noncontrolling interests	(973)
Increase in additional paid-in-capital for redemption of noncontrolling OP units	1,655	189	584
Change from net income attributable to shareholders and transfers from noncontrolling interests	$ 280,592	$ 227,604	$ 86,167

Benefit Plans - Additional Inf

Benefit Plans - Additional Information (Details) $ / shares in Units, $ in Thousands	Dec. 31, 2010USD ($)$ / sharesshares	Jan. 08, 2010USD ($)$ / sharesshares	Dec. 31, 2008USD ($)$ / sharesshares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Common share options granted (in shares)				0	0	0
Exercises in period, intrinsic value | $				$ 271	$ 26
Options, exercisable, intrinsic value | $				$ 91
Shares held in employee trust (in shares)				130,863	427,531
Initial vesting percentage				25.00%
Vesting percentage				100.00%
Vesting period (in years)				4 years
Cost recognized | $				$ 403	$ 397	$ 439
Allocated share-based compensation expense | $				$ 5,831	$ 6,901	$ 8,333
Options 2010
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Common share options granted (in shares)	1,248,501
Common share options exercise price (usd per share) | $ / shares	$ 7.95
Expiration period after termination (in months)	6 months
Deferred compensation equity | $	$ 2,422
Recognized compensation expense average period (in years)				5 years
Options 2010 | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage	20.00%
Options 2010 | Share-based Payment Arrangement, Tranche Two
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage	20.00%
Options 2010 | Share-based Payment Arrangement, Tranche Three
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage	20.00%
Options 2010 | Share-based Compensation Award, Tranche Four
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage	20.00%
Options 2010 | Share-based Compensation Award, Tranche Five
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage	20.00%
Options 2009
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Common share options granted (in shares)		1,265,500
Common share options exercise price (usd per share) | $ / shares		$ 6.39
Expiration period after termination (in months)		6 months
Deferred compensation equity | $		$ 2,771
Recognized compensation expense average period (in years)				5 years
Options 2009 | Share-based Payment Arrangement, Tranche One
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage		20.00%
Options 2009 | Share-based Payment Arrangement, Tranche Two
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage		20.00%
Options 2009 | Share-based Payment Arrangement, Tranche Three
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage		20.00%
Options 2009 | Share-based Compensation Award, Tranche Four
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage		20.00%
Options 2009 | Share-based Compensation Award, Tranche Five
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage		20.00%
Options 2008
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Common share options granted (in shares)			2,000,000
Common share options exercise price (usd per share) | $ / shares			$ 5.60
Number of trading period days (in days)			20 days
Options convertible to common shares			1.13
Options converted to common shares exercise price (usd per share) | $ / shares			$ 4.97
Deferred compensation equity | $			$ 2,480
Recognized compensation expense average period (in years)				3 years 7 months 6 days
Options 2008 | Minimum
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Average closing price, lower limit (usd per share) | $ / shares			$ 8
Options 2008 | Maximum
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Average closing price, lower limit (usd per share) | $ / shares			$ 10
Options 2008 | Share Based Compensation Arrangement By Share Based Payment Award Vesting Rate First Vesting Trigger
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Award vesting rights, percentage			50.00%
Non-Management Award Grant
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Shares issued for services (in shares)				67,226	66,318	57,334
Shares issued for services, value | $				$ 595	$ 599	$ 596
Non-vested Shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Shares issued for services (in shares)				277,460	237,570
Shares issued for services, value | $				$ 2,270	$ 2,190
Non-options, nonvested, number (in shares)				2,941,412	3,455,077	3,767,298
Number of shares available for grant (in shares)				3,116,063
Compensation cost not yet recognized | $				$ 6,800
Total compensation cost not yet recognized, period for recognition (in years)				1 year 8 months 12 days
Shares Subject to Time
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Non-options, nonvested, number (in shares)				1,274,506
Shares Subject to Performance
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Non-options, nonvested, number (in shares)				1,666,906

Benefit Plans - Assumptions Us

Benefit Plans - Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2019$ / shares
Options 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of options granted (usd per share)	$ 1.94
Weighted-average risk-free interest rate	2.54%
Weighted-average expected option lives (in years)	6 years 6 months
Weighted-average expected volatility	49.00%
Weighted-average expected dividend yield	7.40%
Options 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of options granted (usd per share)	$ 2.19
Weighted-average risk-free interest rate	3.29%
Weighted-average expected option lives (in years)	6 years 8 months 12 days
Weighted-average expected volatility	59.08%
Weighted-average expected dividend yield	6.26%
Options 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of options granted (usd per share)	$ 1.24
Weighted-average risk-free interest rate	1.33%
Weighted-average expected option lives (in years)	3 years 7 months 6 days
Weighted-average expected volatility	59.94%
Weighted-average expected dividend yield	14.40%

Benefit Plans - Share Option A

Benefit Plans - Share Option Activity (Details) - Share Options - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares outstanding, beginning (in shares)	118,400	134,790
Number of shares exercised (in shares)	(84,400)	(16,390)
Number of shares outstanding, ending (in shares)	34,000	118,400
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Price per share outstanding, beginning (usd per share)	$ 7.44	$ 7.39
Price per share exercised (usd per share)	7.24	6.99
Price per share outstanding, ending (usd per share)	$ 7.95	$ 7.44

Benefit Plans - Non-Vested Sha

Benefit Plans - Non-Vested Share Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of shares forfeited (in shares)	(1,191,799)
Non-vested Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of shares outstanding, beginning (in shares)	3,455,077	3,767,298
Number of shares granted (in shares)	829,581	899,614
Number of shares vested (in shares)	(151,447)	(618,383)
Number of shares forfeited (in shares)		(593,452)
Number of shares outstanding, ending (in shares)	2,941,412	3,455,077
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Value per share outstanding, beginning (usd per share)	$ 7.34	$ 7.79
Value per share granted (usd per share)	5.97	6.55
Value per share vested (usd per share)	5.06	9.70
Value per share forfeited (usd per share)	6.76	6.59
Value per share outstanding, ending (usd per share)	$ 7.30	$ 7.34

Benefit Plans - Shares Granted

Benefit Plans - Shares Granted to Certain Employees and Trustees (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	5 years
Non-vested Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for services (in shares)	277,460	237,570
Value per share granted (usd per share)	$ 5.97	$ 6.55
Shares issued for services, value	$ 2,270	$ 2,190
Vesting period (in years)	3 years
Number of shares vested (in shares)	151,447	618,383
Number of shares granted (in shares)	829,581	899,614
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period (in years)	3 years
Number of shares vested (in shares)	713,044	116,926
Number of shares granted (in shares)			808,929	642,029
Share-based Payment Arrangement, Tranche One | Index Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for services (in shares)	276,063	331,025
Value per share granted (usd per share)	$ 5.05	$ 5.81
Share-based Payment Arrangement, Tranche One | Peer Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for services (in shares)	276,058	331,019
Value per share granted (usd per share)	$ 4.67	$ 5.37

- Related Party Transactions (D

- Related Party Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Rent revenue		$ 320,622	$ 395,339	$ 391,641
Rent expense for corporate headquarters		1,312	1,274	1,256
Vorando Realty Trust
Related Party Transaction [Line Items]
Rent revenue			234
Rent expense for corporate headquarters		1,128	1,192	1,179
Affiliated Entity
Related Party Transaction [Line Items]
Notes payable, related parties	$ 500	$ 1,000	8,500	$ 8,000
Related party transaction, rate		0.625%
Affiliated Entity | Expense Reimbursement
Related Party Transaction [Line Items]
Expenses from transactions with related party	105	$ 15	$ 150
Affiliated Entity | Structuring Fee
Related Party Transaction [Line Items]
Expenses from transactions with related party	$ 128

Income Taxes - Components of I

Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (70)	$ (60)	$ (107)
State and local	(1,309)	(1,668)	(1,810)
Benefit (provision) for income taxes	$ (1,379)	$ (1,728)	$ (1,917)

Income Taxes - Additional Info

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
State and Local Jurisdiction
Income Taxes [Line Items]
State taxes paid	$ 1,289	$ 1,679	$ 1,598

Income Taxes - Statutory Feder

Income Taxes - Statutory Federal Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal provision at statutory tax rate (21% for 2019 and 2018 and 34% for 2017)	$ (73)	$ (65)	$ (182)
State and local taxes, net of federal benefit	(10)	(11)	(40)
Other	(1,296)	(1,652)	(1,695)
Benefit (provision) for income taxes	$ (1,379)	$ (1,728)	$ (1,917)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	34.00%

Income Taxes - Summary of Aver

Income Taxes - Summary of Average Taxable Nature of Dividends (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Stock
Income Tax Contingency [Line Items]
Total dividends per share, common (usd per share)	$ 0.485	$ 0.710	$ 0.700
Taxable percentage allocation on dividends	100.00%	100.00%	100.00%
Common Stock | Ordinary income
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	61.07%	87.89%	59.93%
Common Stock | Qualifying dividend
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.22%	0.14%	0.15%
Common Stock | Capital gain
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%
Common Stock | Return of capital
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	38.71%	11.97%	39.92%
Series C
Income Tax Contingency [Line Items]
Total dividends per share, preferred (usd per share)	$ 3.25	$ 3.25	$ 3.25
Taxable percentage allocation on dividends	100.00%	100.00%	100.00%
Series C | Ordinary income
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	99.64%	99.84%	99.75%
Series C | Qualifying dividend
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.36%	0.16%	0.25%
Series C | Capital gain
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%
Series C | Return of capital
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 19, 2019	Dec. 18, 2019	Dec. 31, 2019	Oct. 25, 2018
Loss Contingencies [Line Items]
Rent expense			$ 320,622
Officer
Loss Contingencies [Line Items]
Maximum retirement agreement amount			795
Retirement obligation earned			$ 140
Cummins Inc. V Lexington Columbus L.P. And Wells Fargo Trust Company
Loss Contingencies [Line Items]
Purchase option				$ 5,000
Cummins Inc. V Lexington Columbus L.P. And Wells Fargo Trust Company | Settled Litigation
Loss Contingencies [Line Items]
Purchase price	$ 46,915
Rent expense		$ 1,885
Operating lease, reimbursed expenses		$ 700

Supplemental Disclosure of St_3

Supplemental Disclosure of Statement of Cash Flow Information (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Significant Noncash Transactions [Line Items]
Cash and cash equivalents at beginning of period	$ 168,750,000	$ 168,750,000	$ 107,762,000	$ 86,637,000
Cash and cash equivalents at end of period		122,666,000	168,750,000	107,762,000
Restricted cash at beginning of period	8,497,000	8,497,000	4,394,000	31,142,000
Restricted cash at end of period		6,644,000	8,497,000	4,394,000
Cash, cash equivalents and restricted cash, at beginning of year	177,247,000	177,247,000	112,156,000	117,779,000
Cash, cash equivalents and restricted cash, at end of year		129,310,000	177,247,000	112,156,000
Interest paid		59,018,000	76,562,000	75,069,000
Income taxes paid, net		1,482,000	$ 2,025,000	2,340,000
Conveyed Interest
Other Significant Noncash Transactions [Line Items]
Mortgage loans on real estate, foreclosures				$ 12,616,000
Non-Recourse Mortgage
Other Significant Noncash Transactions [Line Items]
Face amount		$ 41,877,000
Richland, Washington
Other Significant Noncash Transactions [Line Items]
Extinguishment of debt	$ 110,000,000

Unaudited Quarterly Financial_3

Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 83,036	$ 81,550	$ 80,135	$ 81,248	$ 88,182	$ 100,295	$ 105,673	$ 102,821	$ 325,969	$ 396,971	$ 392,690
Net income (loss)	85,423	147,821	23,769	28,280	25,674	220,850	(795)	(14,823)	285,293	230,906	86,629
Net income attributable to common shareholders	$ 83,574	$ 141,560	$ 21,721	$ 26,405	$ 23,796	$ 216,190	$ (3,327)	$ (15,957)	$ 273,225	$ 220,838	$ 79,067
Net income attributable to common shareholders - basic (usd per share)	$ 0.34	$ 0.60	$ 0.09	$ 0.11	$ 0.10	$ 0.91	$ (0.01)	$ (0.07)	$ 1.15	$ 0.93	$ 0.33
Net income (loss) attributable to common shareholders - per common share diluted (usd per share)	$ 0.33	$ 0.59	$ 0.09	$ 0.11	$ 0.10	$ 0.90	$ (0.01)	$ (0.07)	$ 1.15	$ 0.93	$ 0.33

Subsequent Events Narrative (De

Subsequent Events Narrative (Details) $ in Thousands	2 Months Ended	12 Months Ended
	Feb. 20, 2020USD ($)properties	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Subsequent Event [Line Items]
Payments to acquire real estate		$ 662,010	$ 315,959	$ 558,571
Subsequent Event
Subsequent Event [Line Items]
Number of real estate properties acquired | properties	4
Payments to acquire real estate	$ 195,000

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation and Amortization - Schedule III (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 390,272
Land and Land Estates	355,697
Buildings and Improvements	2,962,982
Total	3,320,574	$ 3,090,134	$ 3,936,459	$ 3,533,172
Accumulated Depreciation and Amortization	675,596	$ 722,644	$ 890,969	$ 844,931
Deferred loan costs, net	$ 3,600
Building and Improvements | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Land Estates | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	51 years
Industrial Property | Anniston, Alabama
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,201
Buildings and Improvements	16,771
Total	17,972
Accumulated Depreciation and Amortization	3,948
Industrial Property | Opelika, Alabama
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	142
Buildings and Improvements	31,734
Total	31,876
Accumulated Depreciation and Amortization	3,280
Industrial Property | Goodyear, Arizona | Goodyear, AZ Industrial Acquired Nov-18
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,247
Buildings and Improvements	36,115
Total	41,362
Accumulated Depreciation and Amortization	1,788
Industrial Property | Goodyear, Arizona | Goodyear, AZ Industrial Acquired Nov-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	41,877
Land and Land Estates	11,970
Buildings and Improvements	48,924
Total	60,894
Accumulated Depreciation and Amortization	183
Industrial Property | Tolleson, Arizona
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,311
Buildings and Improvements	16,013
Total	19,324
Accumulated Depreciation and Amortization	177
Industrial Property | Orlando, Florida
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,030
Buildings and Improvements	10,869
Total	11,899
Accumulated Depreciation and Amortization	3,984
Industrial Property | Tampa, Florida
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,160
Buildings and Improvements	8,526
Total	10,686
Accumulated Depreciation and Amortization	7,041
Industrial Property | Austell, Georgia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,251
Buildings and Improvements	40,035
Total	43,286
Accumulated Depreciation and Amortization	882
Industrial Property | Lavonia, Georgia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	171
Buildings and Improvements	7,657
Total	7,828
Accumulated Depreciation and Amortization	1,588
Industrial Property | McDonough, Georgia | McDonough, GA Industrial Acquired Aug-17
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,441
Buildings and Improvements	52,790
Total	58,231
Accumulated Depreciation and Amortization	5,293
Industrial Property | McDonough, Georgia | McDonough, GA Industrial Acquired Feb-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,253
Buildings and Improvements	30,956
Total	34,209
Accumulated Depreciation and Amortization	1,237
Industrial Property | McDonough, Georgia | McDonough, GA Industrial Acquired Dec-06
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,463
Buildings and Improvements	24,811
Total	27,274
Accumulated Depreciation and Amortization	8,453
Industrial Property | Union City, Georgia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,536
Buildings and Improvements	22,830
Total	25,366
Accumulated Depreciation and Amortization	504
Industrial Property | Edwardsville, Illinois | Edwardsville, IL Industrial Acquired Dec-16
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,593
Buildings and Improvements	34,362
Total	38,955
Accumulated Depreciation and Amortization	4,268
Industrial Property | Edwardsville, Illinois | Edwardsville, IL Industrial Acquired Jun- 18
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,649
Buildings and Improvements	41,310
Total	44,959
Accumulated Depreciation and Amortization	2,796
Industrial Property | Minooka, Illinois
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,432
Buildings and Improvements	40,947
Total	44,379
Accumulated Depreciation and Amortization	0
Industrial Property | Rantoul, Illinois
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,304
Buildings and Improvements	32,562
Total	33,866
Accumulated Depreciation and Amortization	5,368
Industrial Property | Rockford, Illinois | Rockford, IL Industrial Acquired Dec-06
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	371
Buildings and Improvements	2,633
Total	3,004
Accumulated Depreciation and Amortization	938
Industrial Property | Rockford, Illinois | Rockford, IL Industrial Acquired Dec-06, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	509
Buildings and Improvements	5,921
Total	6,430
Accumulated Depreciation and Amortization	1,900
Industrial Property | Romeoville, Illinois
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	7,524
Buildings and Improvements	40,167
Total	47,691
Accumulated Depreciation and Amortization	5,118
Industrial Property | Lafayette, Indiana
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	662
Buildings and Improvements	15,578
Total	16,240
Accumulated Depreciation and Amortization	1,800
Industrial Property | Lebanon, Indiana
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,100
Buildings and Improvements	29,443
Total	31,543
Accumulated Depreciation and Amortization	3,526
Industrial Property | Whitestown, Indiana
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,954
Buildings and Improvements	16,821
Total	18,775
Accumulated Depreciation and Amortization	719
Industrial Property | New Century, Kansas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	13,330
Total	13,330
Accumulated Depreciation and Amortization	1,680
Industrial Property | Dry Ridge, Kentucky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	560
Buildings and Improvements	12,553
Total	13,113
Accumulated Depreciation and Amortization	6,325
Industrial Property | Elizabethtown, Kentucky | Elizabethtown, KY Industrial Acquired Jun-05
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	890
Buildings and Improvements	26,868
Total	27,758
Accumulated Depreciation and Amortization	13,538
Industrial Property | Elizabethtown, Kentucky | Elizabethtown, KY Industrial Acquired Jun-05, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	352
Buildings and Improvements	4,862
Total	5,214
Accumulated Depreciation and Amortization	2,450
Industrial Property | Hopkinsville, Kentucky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	631
Buildings and Improvements	16,154
Total	16,785
Accumulated Depreciation and Amortization	8,673
Industrial Property | Owensboro, Kentucky | Owensboro, KY Industrial Acquired Jun-05
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	393
Buildings and Improvements	11,956
Total	12,349
Accumulated Depreciation and Amortization	6,971
Industrial Property | Owensboro, Kentucky | Owensboro, KY Industrial Acquired Dec-06
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	819
Buildings and Improvements	2,439
Total	3,258
Accumulated Depreciation and Amortization	1,169
Industrial Property | Shreveport, Louisiana | Shreveport, LA Industrial Acquired Mar-07
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	860
Buildings and Improvements	21,840
Total	22,700
Accumulated Depreciation and Amortization	6,984
Industrial Property | Shreveport, Louisiana | Shreveport, LA Industrial Acquired Jun-12
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,078
Buildings and Improvements	10,134
Total	11,212
Accumulated Depreciation and Amortization	2,796
Industrial Property | North Berwick, Maine
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,383
Buildings and Improvements	35,659
Total	37,042
Accumulated Depreciation and Amortization	11,603
Industrial Property | Detroit, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,133
Buildings and Improvements	25,009
Total	26,142
Accumulated Depreciation and Amortization	5,204
Industrial Property | Kalamazoo, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,942
Buildings and Improvements	14,169
Total	16,111
Accumulated Depreciation and Amortization	4,175
Industrial Property | Marshall, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	143
Buildings and Improvements	4,302
Total	4,445
Accumulated Depreciation and Amortization	3,271
Industrial Property | Plymouth, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,296
Buildings and Improvements	15,772
Total	18,068
Accumulated Depreciation and Amortization	6,912
Industrial Property | Romulus, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,438
Buildings and Improvements	33,786
Total	36,224
Accumulated Depreciation and Amortization	3,842
Industrial Property | Warren, Michigan
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	25,850
Land and Land Estates	972
Buildings and Improvements	42,521
Total	43,493
Accumulated Depreciation and Amortization	3,851
Industrial Property | Minneapolis, Minnesota
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,886
Buildings and Improvements	1,922
Total	3,808
Accumulated Depreciation and Amortization	440
Industrial Property | Byhalia, Mississippi | Byhalia, MS Industrial Property Acquired May-11
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,006
Buildings and Improvements	35,795
Total	36,801
Accumulated Depreciation and Amortization	7,350
Industrial Property | Byhalia, Mississippi | Byhalia, MS Industrial Property Acquired Sep-17
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,751
Buildings and Improvements	31,236
Total	32,987
Accumulated Depreciation and Amortization	4,094
Industrial Property | Canton, Mississippi
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,077
Buildings and Improvements	71,289
Total	76,366
Accumulated Depreciation and Amortization	16,402
Industrial Property | Olive Branch, Mississippi | Olive Branch, MS Industrial Acquired Apr- 18
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,500
Buildings and Improvements	42,556
Total	45,056
Accumulated Depreciation and Amortization	3,432
Industrial Property | Olive Branch, Mississippi | Olive Branch, MS Industrial Acquired Dec- 04
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	198
Buildings and Improvements	10,276
Total	10,474
Accumulated Depreciation and Amortization	7,794
Industrial Property | Olive Branch, Mississippi | Olive Branch, MS Industrial Acquired May-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,646
Buildings and Improvements	40,446
Total	43,092
Accumulated Depreciation and Amortization	1,016
Industrial Property | Olive Branch, Mississippi | Olive Branch, MS Industrial Acquired Apr- 18, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,958
Buildings and Improvements	38,702
Total	40,660
Accumulated Depreciation and Amortization	3,131
Industrial Property | Olive Branch, Mississippi | Olive Branch, MS Industrial Acquired May-19, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	851
Buildings and Improvements	15,464
Total	16,315
Accumulated Depreciation and Amortization	384
Industrial Property | Lumberton, North Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	405
Buildings and Improvements	12,049
Total	12,454
Accumulated Depreciation and Amortization	5,039
Industrial Property | Shelby, North Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,421
Buildings and Improvements	18,862
Total	20,283
Accumulated Depreciation and Amortization	6,007
Industrial Property | Statesville, North Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	891
Buildings and Improvements	16,771
Total	17,662
Accumulated Depreciation and Amortization	6,148
Industrial Property | Durham, New Hampshire
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,464
Buildings and Improvements	18,094
Total	21,558
Accumulated Depreciation and Amortization	7,563
Industrial Property | North Las Vegas, Nevada
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,244
Buildings and Improvements	21,732
Total	24,976
Accumulated Depreciation and Amortization	3,582
Industrial Property | Erwin, New York
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,648
Buildings and Improvements	12,514
Total	14,162
Accumulated Depreciation and Amortization	3,504
Industrial Property | Long Island City, New York
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	36,449
Land and Land Estates	0
Buildings and Improvements	42,759
Total	42,759
Accumulated Depreciation and Amortization	19,432
Industrial Property | Chillicothe, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	735
Buildings and Improvements	9,021
Total	9,756
Accumulated Depreciation and Amortization	3,406
Industrial Property | Cincinnati, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,049
Buildings and Improvements	8,784
Total	9,833
Accumulated Depreciation and Amortization	3,364
Industrial Property | Columbus, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,990
Buildings and Improvements	10,893
Total	12,883
Accumulated Depreciation and Amortization	4,573
Industrial Property | Glenwillow, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,228
Buildings and Improvements	24,530
Total	26,758
Accumulated Depreciation and Amortization	8,373
Industrial Property | Hebron, Ohio | Hebron, OH Industrial, Acquired Dec-97
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,063
Buildings and Improvements	4,947
Total	6,010
Accumulated Depreciation and Amortization	2,198
Industrial Property | Hebron, Ohio | Hebron, OH Industrial, Acquired Dec-01
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,681
Buildings and Improvements	8,179
Total	9,860
Accumulated Depreciation and Amortization	3,863
Industrial Property | Monroe, Ohio | Monroe, OH Industrial Acquired Sep-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	544
Buildings and Improvements	12,370
Total	12,914
Accumulated Depreciation and Amortization	177
Industrial Property | Monroe, Ohio | Monroe, OH Industrial Acquired Sep-19, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,123
Buildings and Improvements	60,702
Total	63,825
Accumulated Depreciation and Amortization	903
Industrial Property | Monroe, Ohio | Monroe, OH Industrial Acquired Sep-19, Property 3
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,950
Buildings and Improvements	88,422
Total	92,372
Accumulated Depreciation and Amortization	1,267
Industrial Property | Pataskala, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,628
Buildings and Improvements	0
Total	3,628
Accumulated Depreciation and Amortization	0
Industrial Property | Streetsboro, Ohio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,441
Buildings and Improvements	25,282
Total	27,723
Accumulated Depreciation and Amortization	10,426
Industrial Property | Wilsonville, Oregon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	6,815
Buildings and Improvements	32,424
Total	39,239
Accumulated Depreciation and Amortization	4,606
Industrial Property | Bristol, Pennsylvania
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,508
Buildings and Improvements	15,863
Total	18,371
Accumulated Depreciation and Amortization	8,248
Industrial Property | Chester, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,763
Land and Land Estates	1,629
Buildings and Improvements	8,470
Total	10,099
Accumulated Depreciation and Amortization	2,269
Industrial Property | Duncan, South Carolina | Duncan, SC Industrial Acquired Oct-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,406
Buildings and Improvements	14,272
Total	15,678
Accumulated Depreciation and Amortization	155
Industrial Property | Duncan, South Carolina | Duncan, SC Industrial Acquired Oct-19, Property 2
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,257
Buildings and Improvements	13,252
Total	14,509
Accumulated Depreciation and Amortization	144
Industrial Property | Duncan, South Carolina | Duncan, SC Industrial Acquired Apr-19
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,615
Buildings and Improvements	27,830
Total	29,445
Accumulated Depreciation and Amortization	821
Industrial Property | Duncan, South Carolina | Duncan, SC Industrial Acquired Jun-07
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	884
Buildings and Improvements	8,749
Total	9,633
Accumulated Depreciation and Amortization	2,818
Industrial Property | Greer, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	6,959
Buildings and Improvements	78,364
Total	85,323
Accumulated Depreciation and Amortization	0
Industrial Property | Laurens, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,552
Buildings and Improvements	21,908
Total	27,460
Accumulated Depreciation and Amortization	8,465
Industrial Property | Spartanburg, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,447
Buildings and Improvements	23,758
Total	25,205
Accumulated Depreciation and Amortization	1,706
Industrial Property | Cleveland, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,871
Buildings and Improvements	29,743
Total	31,614
Accumulated Depreciation and Amortization	3,461
Industrial Property | Crossville, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	545
Buildings and Improvements	6,999
Total	7,544
Accumulated Depreciation and Amortization	4,924
Industrial Property | Franklin, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	5,673
Total	5,673
Accumulated Depreciation and Amortization	3,519
Industrial Property | Jackson, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,454
Buildings and Improvements	49,026
Total	50,480
Accumulated Depreciation and Amortization	4,724
Industrial Property | Lewisburg, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	173
Buildings and Improvements	10,865
Total	11,038
Accumulated Depreciation and Amortization	1,923
Industrial Property | Millington, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	723
Buildings and Improvements	19,383
Total	20,106
Accumulated Depreciation and Amortization	13,881
Industrial Property | Smyrna, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,793
Buildings and Improvements	93,940
Total	95,733
Accumulated Depreciation and Amortization	9,277
Industrial Property | Arlington, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	589
Buildings and Improvements	7,739
Total	8,328
Accumulated Depreciation and Amortization	1,899
Industrial Property | Brookshire, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,388
Buildings and Improvements	16,614
Total	19,002
Accumulated Depreciation and Amortization	3,692
Industrial Property | Carrollton, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,228
Buildings and Improvements	15,784
Total	19,012
Accumulated Depreciation and Amortization	1,319
Industrial Property | Dallas, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,420
Buildings and Improvements	23,330
Total	25,750
Accumulated Depreciation and Amortization	657
Industrial Property | Grand Prairie, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,166
Buildings and Improvements	17,985
Total	21,151
Accumulated Depreciation and Amortization	1,950
Industrial Property | Houston, Texas | Houston, TX Industrial Acquired Mar-15
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,674
Buildings and Improvements	19,540
Total	24,214
Accumulated Depreciation and Amortization	10,153
Industrial Property | Houston, Texas | Houston, TX Industrial Acquired Mar-13
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	15,055
Buildings and Improvements	57,949
Total	73,004
Accumulated Depreciation and Amortization	12,174
Industrial Property | Missouri City, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	14,555
Buildings and Improvements	5,895
Total	20,450
Accumulated Depreciation and Amortization	5,895
Industrial Property | Pasadena, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,057
Buildings and Improvements	17,810
Total	21,867
Accumulated Depreciation and Amortization	1,085
Industrial Property | San Antonio, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,311
Buildings and Improvements	36,644
Total	37,955
Accumulated Depreciation and Amortization	3,940
Industrial Property | Chester, Virginia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	8,544
Buildings and Improvements	53,067
Total	61,611
Accumulated Depreciation and Amortization	2,854
Industrial Property | Winchester, Virginia | Winchester, VA Industrial Acquired Dec-17
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,988
Buildings and Improvements	32,536
Total	34,524
Accumulated Depreciation and Amortization	2,784
Industrial Property | Winchester, Virginia | Winchester, VA Industrial Acquired Jun-07
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,823
Buildings and Improvements	12,276
Total	16,099
Accumulated Depreciation and Amortization	4,615
Industrial Property | Bingen, Washington
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	18,075
Total	18,075
Accumulated Depreciation and Amortization	5,201
Industrial Property | Oak Creek, Wisconsin
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,015
Buildings and Improvements	15,300
Total	18,315
Accumulated Depreciation and Amortization	3,040
Industrial properties, Multi-tenant/vacant properties | Moody, Alabama
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	654
Buildings and Improvements	11,325
Total	11,979
Accumulated Depreciation and Amortization	7,902
Industrial properties, Multi-tenant/vacant properties | Thomson, Georgia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	909
Buildings and Improvements	7,746
Total	8,655
Accumulated Depreciation and Amortization	2,024
Industrial properties, Multi-tenant/vacant properties | Henderson, North Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,488
Buildings and Improvements	5,953
Total	7,441
Accumulated Depreciation and Amortization	2,698
Industrial properties, Multi-tenant/vacant properties | Antioch, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,847
Buildings and Improvements	12,659
Total	16,506
Accumulated Depreciation and Amortization	4,036
Office Building | Tempe, Arizona
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	13,086
Total	13,086
Accumulated Depreciation and Amortization	3,537
Office Building | Tucson, Arizona
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	681
Buildings and Improvements	4,037
Total	4,718
Accumulated Depreciation and Amortization	1,277
Office Building | Palo Alto, California
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	26,301
Land and Land Estates	12,398
Buildings and Improvements	16,977
Total	29,375
Accumulated Depreciation and Amortization	24,397
Office Building | Boca Raton, Florida
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,465
Land and Land Estates	4,290
Buildings and Improvements	17,160
Total	21,450
Accumulated Depreciation and Amortization	7,240
Office Building | Orlando, Florida
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,538
Buildings and Improvements	9,353
Total	12,891
Accumulated Depreciation and Amortization	7,007
Office Building | McDonough, Georgia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	693
Buildings and Improvements	6,405
Total	7,098
Accumulated Depreciation and Amortization	1,772
Office Building | Lenexa, Kansas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,828
Buildings and Improvements	6,075
Total	8,903
Accumulated Depreciation and Amortization	2,101
Office Building | Baton Rouge, Louisiana
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	760
Buildings and Improvements	3,838
Total	4,598
Accumulated Depreciation and Amortization	0
Office Building | Oakland, Maine
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	551
Buildings and Improvements	8,774
Total	9,325
Accumulated Depreciation and Amortization	2,642
Office Building | Kansas City, Missouri
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,525
Buildings and Improvements	10,164
Total	11,689
Accumulated Depreciation and Amortization	582
Office Building | Wall, New Jersey
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,576
Land and Land Estates	8,985
Buildings and Improvements	26,961
Total	35,946
Accumulated Depreciation and Amortization	16,773
Office Building | Whippany, New Jersey
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,572
Land and Land Estates	4,063
Buildings and Improvements	19,711
Total	23,774
Accumulated Depreciation and Amortization	10,639
Office Building | Philadelphia, Pennsylvania
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	13,209
Buildings and Improvements	65,911
Total	79,120
Accumulated Depreciation and Amortization	44,298
Office Building | Florence, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	774
Buildings and Improvements	3,629
Total	4,403
Accumulated Depreciation and Amortization	833
Office Building | Fort Mill, South Carolina | Fort Mill, SC Office, Acquired Nov-04
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,798
Buildings and Improvements	26,964
Total	28,762
Accumulated Depreciation and Amortization	20,373
Office Building | Fort Mill, South Carolina | Fort Mill, SC Office, Acquired Dec-02
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,601
Buildings and Improvements	16,306
Total	19,907
Accumulated Depreciation and Amortization	6,836
Office Building | Knoxville, Tennessee
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	621
Buildings and Improvements	6,566
Total	7,187
Accumulated Depreciation and Amortization	1,861
Office Building | Arlington, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,274
Buildings and Improvements	15,359
Total	16,633
Accumulated Depreciation and Amortization	4,013
Office Building | Lake Jackson, Texa
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	183,077
Land and Land Estates	7,435
Buildings and Improvements	141,436
Total	148,871
Accumulated Depreciation and Amortization	18,027
Office Building | Mission, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,556
Buildings and Improvements	2,911
Total	5,467
Accumulated Depreciation and Amortization	1,172
Office Building | Westlake, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,361
Buildings and Improvements	27,788
Total	30,149
Accumulated Depreciation and Amortization	14,952
Office Building | Herndon, Virginia
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,127
Buildings and Improvements	25,293
Total	30,420
Accumulated Depreciation and Amortization	12,071
Office Building, Multi-tenant/vacant properties | Phoenix, Arizona
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,096
Buildings and Improvements	6,228
Total	7,324
Accumulated Depreciation and Amortization	517
Office Building, Multi-tenant/vacant properties | Overland Park, Kansas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	32,112
Land and Land Estates	2,025
Buildings and Improvements	10,976
Total	13,001
Accumulated Depreciation and Amortization	4,242
Office Building, Multi-tenant/vacant properties | Charleston, South Carolina
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,830
Land and Land Estates	1,189
Buildings and Improvements	9,419
Total	10,608
Accumulated Depreciation and Amortization	5,104
Office Building, Multi-tenant/vacant properties | Houston, Texas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,875
Buildings and Improvements	10,959
Total	12,834
Accumulated Depreciation and Amortization	8,449
Other Property | Venice, Florida
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,696
Buildings and Improvements	11,753
Total	16,449
Accumulated Depreciation and Amortization	10,517
Other Property | Baltimore, Maryland | Baltimore, MD Other Acquired Dec-06
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,605
Buildings and Improvements	0
Total	4,605
Accumulated Depreciation and Amortization	0
Other Property | Baltimore, Maryland | Baltimore, MD Other Acquired Dec-15
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,000
Buildings and Improvements	0
Total	5,000
Accumulated Depreciation and Amortization	0
Other properties, Multi-tenant/vacant properties | Honolulu, Hawaii
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	8,259
Buildings and Improvements	7,471
Total	15,730
Accumulated Depreciation and Amortization	7,402
Construction in Progress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	0
Total	1,895
Accumulated Depreciation and Amortization	$ 0

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation and Amortization - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate and Accumulated Depreciation [Line Items]
Total cost basis for federal income tax purposes	$ 3,800,000
Reconciliation of real estate owned:
Balance at the beginning of year	3,090,134	$ 3,936,459	$ 3,533,172
Additions during year	663,742	310,207	676,355
Properties sold and impaired during the year	(496,730)	(1,091,956)	(270,241)
Other reclassifications	63,428	(64,576)	(2,827)
Balance at end of year	3,320,574	3,090,134	3,936,459
Reconciliation of accumulated depreciation and amortization:
Balance at the beginning of year	722,644	890,969	844,931
Depreciation and amortization expense	118,525	136,571	139,493
Accumulated depreciation and amortization of properties sold, impaired and held for sale during year	(177,709)	(290,938)	(93,455)
Other reclassifications	12,136	(13,958)	0
Balance at end of year	$ 675,596	$ 722,644	$ 890,969