InvenTrust Properties (IVT) 10-K 7 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 01, 2019	Jun. 29, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	InvenTrust Properties Corp.
Entity Central Index Key	1,307,748
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		728,558,989
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2,431,770,322

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investment properties
Land	$ 558,817	$ 628,487
Building and other improvements	1,670,678	1,887,598
Construction in progress	12,788	4,975
Total	2,242,283	2,521,060
Less accumulated depreciation	(286,330)	(348,337)
Net investment properties	1,955,953	2,172,723
Cash and cash equivalents	260,131	162,747
Restricted cash	4,722	9,131
Investment in marketable securities	0	4,758
Investment in unconsolidated entities	156,132	180,764
Intangible assets, net	108,005	115,411
Accounts and rents receivable (net of allowance of $1,703 and $1,266)	27,087	30,522
Deferred costs and other assets, net	23,976	22,548
Total assets	2,536,006	2,698,604
Liabilities
Debt, net	561,782	667,861
Accounts payable and accrued expenses	32,784	37,798
Distributions payable	13,029	13,441
Intangible liabilities, net	46,985	53,532
Other liabilities	29,112	20,250
Total liabilities	683,692	792,882
Commitments and contingencies
Stockholders' Equity
Preferred stock, $.001 par value, 40,000,000 shares authorized, none outstanding	0	0
Common stock, $.001 par value, 1,460,000,000 shares authorized, 728,558,989 shares issued and outstanding as of December 31, 2018 and 774,293,197 shares issued and outstanding as of December 31, 2017, respectively	729	773
Additional paid-in capital	5,585,758	5,681,912
Distributions in excess of accumulated net income	(3,735,810)	(3,778,908)
Accumulated comprehensive income	1,637	1,945
Total stockholders' equity	1,852,314	1,905,722
Total liabilities and stockholders' equity	$ 2,536,006	$ 2,698,604

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,703	$ 1,266
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, number of shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, number of shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,460,000,000	1,460,000,000
Common stock, number of shares issued (in shares)	728,558,989	774,293,197
Common stock, number of shares outstanding (in shares)	728,558,989	774,293,197

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income
Rental income	$ 176,640	$ 188,235	$ 181,481
Total income	242,674	251,809	242,693
Expenses
General and administrative expenses	35,267	42,661	49,107
Property operating expenses	34,822	35,656	35,364
Real estate taxes	35,205	35,566	35,703
Depreciation and amortization	100,593	95,345	83,685
Provision for asset impairment	3,510	27,754	11,208
Total expenses	209,397	236,982	215,067
Operating income	33,277	14,827	27,626
Interest and dividend income	2,044	4,249	11,849
Gain on sale and transfer of investment properties, net	95,097	24,066	117,848
Gain (loss) on extinguishment of debt, net	9,103	840	(10,498)
Other income (expense)	450	(308)	2,330
Interest expense, net	(24,943)	(30,155)	(44,135)
Equity in (losses) earnings and (impairment), net, of unconsolidated entities	(31,393)	(804)	9,299
Realized and unrealized investment gains (losses) and (impairment), net	244	46,563	5,081
Income from continuing operations before income taxes	83,879	59,278	119,400
Income tax expense	(30)	(1,324)	(201)
Net income from continuing operations	83,849	57,954	119,199
Net income from discontinued operations	0	3,839	133,523
Net income	$ 83,849	$ 61,793	$ 252,722
Weighted average number of common shares outstanding, basic and diluted (in shares)	761,139,011	773,445,341	854,638,497
Net income, per common share, from continuing operations, basic and diluted (in dollars per share)	$ 0.11	$ 0.07	$ 0.14
Net income, per common share, from discontinued operations, basic and diluted (in dollars per share)	0	0	0.15
Net income per common share, basic and diluted (in dollars per share)	$ 0.11	$ 0.07	$ 0.29
Comprehensive income
Net income	$ 83,849	$ 61,793	$ 252,722
Unrealized (loss) gain on investment securities	0	(11,734)	24,540
Unrealized gain on derivatives	923
Unrealized gain on derivatives		1,183	623
Reclassification for amounts recognized in net income	(956)	(46,563)	(3,394)
Comprehensive income	83,816	4,679	274,491
Tenant recovery income
Income
Income	57,993	57,192	53,218
Other property income
Income
Income	3,651	2,160	3,646
Other fee income
Income
Income	$ 4,390	$ 4,222	$ 4,348

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Distributions in excess of accumulated net income	Accumulated Comprehensive Income
Balance beginning of period at Dec. 31, 2015	$ 2,148,703	$ 862	$ 6,066,583	$ (3,956,032)	$ 37,290
Balance beginning of period (in shares) at Dec. 31, 2015		862,205,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	252,722			252,722
Unrealized gain (loss) on investment securities	24,540				24,540
Unrealized gain on derivatives	623				623
Reclassification for amounts recognized in net income	(3,394)				(3,394)
Distributions declared	(83,633)			(83,633)
Stock-based compensation, net	2,088		2,088
Stock-based compensation, net (in shares)		601,774
Repurchase of common stock	(241,016)	$ (89)	(240,927)
Repurchase of common stock (in shares)		(89,502,449)
Equity effect of spin-off of Highlands REIT, Inc.	(151,105)		(151,105)
Balance end of period at Dec. 31, 2016	1,949,528	$ 773	5,676,639	(3,786,943)	59,059
Balance end of period (in shares) at Dec. 31, 2016		773,304,997
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	61,793			61,793
Unrealized gain (loss) on investment securities	(11,734)				(11,734)
Unrealized gain on derivatives	1,183				1,183
Reclassification for amounts recognized in net income	(46,563)				(46,563)
Distributions declared	(53,758)			(53,758)
Stock-based compensation, net	3,344		3,344
Stock-based compensation, net (in shares)		988,200
Refund of excess funds associated with 2016 tender offer	1,929		1,929
Balance end of period at Dec. 31, 2017	1,905,722	$ 773	5,681,912	(3,778,908)	1,945
Balance end of period (in shares) at Dec. 31, 2017		774,293,197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,849			83,849
Unrealized gain (loss) on investment securities	0
Unrealized gain on derivatives	923				923
Reclassification for amounts recognized in net income	(956)				(956)
Distributions declared	(53,782)			(53,782)
Stock-based compensation, net	2,293	$ 1	2,292
Stock-based compensation, net (in shares)		825,081
Repurchase of common stock	(98,491)	$ (45)	(98,446)
Repurchase of common stock (in shares)		(46,559,289)
Balance end of period at Dec. 31, 2018	$ 1,852,314	$ 729	$ 5,585,758	$ (3,735,810)	$ 1,637
Balance end of period (in shares) at Dec. 31, 2018		728,558,989

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 83,849	$ 61,793	$ 252,722
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	100,780	96,734	116,424
Amortization of above and below-market leases, net	(5,534)	(5,510)	(4,255)
Amortization of debt premiums, discounts, and financing costs, net	1,048	1,219	5,206
Straight-line rental income	(4,262)	(2,202)	20
Provision for asset impairment	3,510	27,754	117,722
Gain on sale and transfer of investment properties, net	(95,097)	(34,181)	(354,104)
(Gain) loss on extinguishment of debt, net	(9,103)	(838)	13,324
Equity in losses (earnings) and impairment, net, of unconsolidated entities	31,393	804	(9,319)
Distributions from unconsolidated entities	8,032	2,443	5,014
Gain on sale of investment in unconsolidated entity	0	0	(1,434)
Realized and unrealized investment (gains) losses and impairment, net	(244)	(46,563)	(5,081)
Non-cash share-based compensation, net	4,330	3,355	2,178
Changes in assets and liabilities:
Accounts and rents receivable, net	(218)	(1,048)	(45)
Deferred costs and other assets	1,426	2,051	6,701
Accounts payable and accrued expenses	2,499	5,561	(8,129)
Other liabilities	2,248	6,780	(3,780)
Net cash provided by operating activities	124,657	118,152	133,164
Cash flows from investing activities:
Purchase of investment properties	(205,462)	(539,242)	(423,563)
Acquired in-place and market lease intangibles, net	(15,369)	(50,207)	(25,584)
Capital expenditures and tenant improvements	(27,233)	(15,910)	(13,721)
Investment in development and re-development projects	(3,796)	(3,630)	(53,077)
Proceeds from sale and transfer of investment properties, net	430,514	233,686	1,580,994
Proceeds from sale of marketable securities, net	4,696	171,666	12,846
Proceeds from sale of and return of capital from unconsolidated entity	0	0	6,344
Contributions to unconsolidated entities	(2,782)	(6,875)	(7,200)
Distributions from unconsolidated entities	745	1,592	10,433
Lease commissions and other leasing costs	(6,029)	(4,356)	(3,836)
Other assets	(127)	439	(2,402)
Other liabilities	257	3,749	(2,485)
Net cash provided by (used in) investing activities	175,414	(209,088)	1,078,749
Cash flows from financing activities:
Payment of tax withholdings for share-based compensation	(1,567)	(2,192)	(1,493)
Shares repurchased	(98,447)	0	(241,016)
Distributions	(54,194)	(53,358)	(98,606)
Refund received of excess funds associated with 2016 tender offer	0	1,929	0
Proceeds from debt	179,333	0	449,306
Payoffs of debt	(221,358)	(104,032)	(1,072,166)
Debt prepayment penalties and defeasance costs	(3,088)	0	(11,140)
Principal payments of mortgage debt	(1,924)	(1,390)	(10,832)
Payment of loan fees and deposits	(5,544)	(368)	(56)
Payment of capital lease liabilities	(307)	0	0
Cash contribution to Highlands REIT, Inc.	0	0	(27,109)
Net cash used in financing activities	(207,096)	(159,411)	(1,013,112)
Net increase (decrease) in cash, cash equivalents, and restricted cash	92,975	(250,347)	198,801
Cash, cash equivalents, and restricted cash at beginning of year	171,878	422,225	223,424
Cash, cash equivalents, and restricted cash at end of year	264,853	171,878	422,225
Reconciliation of cash, cash equivalents, and restricted cash to consolidated balance sheets:
Cash, cash equivalents, and restricted cash at end of year	171,878	422,225	223,424
Supplemental disclosure of cash flow information:
Cash paid for interest net of capitalized interest of $0, $0, and $1,147 for 2018, 2017, and 2016, respectively	24,096	31,196	56,980
Cash paid for income taxes, net of refunds of $1,703, $918, and $1,575 for 2018, 2017, and 2016, respectively	463	625	966
Distributions payable	13,029	13,441	13,041
Accrued lease commissions and other leasing costs	104	376	143
Accrued tenant building construction	4,690	0	0
Gross issuance of shares for share-based compensation	4,319	5,916	3,820
Net equity distributed to Highlands REIT, Inc. (net of cash and restricted cash contributed)	0	0	123,996
Purchase of investment properties:
Net investment properties	206,763	582,660	439,335
Accounts and rents receivable, lease intangibles, and deferred costs and other assets	21,631	69,617	45,029
Accounts payable and accrued expenses, lease intangibles, and other liabilities	(7,563)	(21,111)	(19,217)
Assumption of mortgage debt	0	(41,717)	(16,000)
Cash outflow for purchase of investment properties, net	220,831	589,449	449,147
Assumption of mortgage principal	0	41,000	16,000
Capitalized acquisition costs	(430)	(1,911)	(220)
Construction escrow accounts	975	1,649	0
Credits and other changes in cash outflow, net	1,224	3,238	250
Gross acquisition price of investment properties	222,600	633,425	465,177
Sale and transfer of investment properties:
Net investment properties	382,241	200,399	1,372,795
Accounts and rents receivable, lease intangibles, and deferred costs and other assets	14,692	6,658	16,451
Debt extinguished through transfer of properties	(44,331)	(3,343)	0
Debt assumed by buyer through disposition of properties	(16,395)	0	(129,051)
Settlement of derivative instrument through disposition of property	0	0	3,004
Gain on sale and transfer of investment properties, net	95,097	34,181	354,104
Gain (loss) on extinguishment of debt, net	9,157	838	(13,324)
Debt prepayment penalties and defeasance costs	3,088	0	11,140
Assumption of mortgage principal by buyer	16,600	0	131,189
Surrender of mortgage escrows for transferred properties	2,160	6,024	0
Credits and other changes in cash inflow, net	16,901	4,356	212,167
Gross disposition price of investment properties	$ 466,175	$ 244,066	$ 1,924,350

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Capitalized interest	$ 0	$ 0	$ 1,147
Refunds	$ 1,703	$ 918	$ 1,575

Organization

Organization	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	On October 4, 2004, InvenTrust Properties Corp. (the "Company","we","us","our") was incorporated as Inland American Real Estate Trust, Inc. as a Maryland corporation and has elected to be taxed, and currently qualifies, as a real estate investment trust ("REIT") for federal tax purposes. The Company changed its name to InvenTrust Properties Corp. in April of 2015. The Company was originally formed to own, manage, acquire, and develop a diversified portfolio of commercial real estate located throughout the United States and to partially own properties through joint ventures and to own investments in marketable securities and other assets. The Company is now focused on owning, managing, acquiring, and developing a multi-tenant retail platform. Unless otherwise noted, all dollar amounts are stated in thousands, except per share and per square foot data. Any reference to number of assets, square feet, tenant and occupancy data are unaudited. The accompanying consolidated financial statements include the accounts of the Company, and all wholly owned subsidiaries and any consolidated variable interest entities ("VIEs"). Subsidiaries generally consist of limited liability companies ("LLCs") and limited partnerships ("LPs"). All significant intercompany balances and transactions have been eliminated. Each retail property is owned by a separate legal entity that maintains its own books and financial records, and each separate legal entity's assets are not available to satisfy the liabilities of other affiliated entities, except as otherwise disclosed in "Note 9. Debt". As of December 31, 2018 , the Company's investment properties consisted of 58 retail properties, with a gross leasable area ("GLA") of approximately 9.5 million square feet, which includes one retail property classified as a consolidated VIE, with a gross leasable area of approximately 125,000 square feet. As of December 31, 2017, the Company's investment properties consisted of 71 retail properties, with a combined GLA of approximately 12.4 million square feet, which includes two retail properties classified as consolidated VIEs, with a GLA of approximately 501,000 square feet. As of December 31, 2016, the Company's investment properties consisted of 71 retail properties, with a GLA of approximately 12.2 million square feet, and one non-core office property, Worldgate Plaza. In addition, as of December 31, 2018, 2017, and 2016, the Company had investments in two unconsolidated real estate joint ventures, one of which owns an interest in 13 , 15 , and 15 operating retail properties, respectively, with a GLA of approximately 2.6 million , 3.0 million , and 3.0 million square feet, respectively, managed by the Company. The other joint venture owns land to be developed in Sacramento, California. Segment Reporting As disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2016, on April 26, 2016, the Company completed the spin-off of Highlands REIT, Inc. ("Highlands"), which held its remaining non-core properties, and on June 23, 2016, it completed the sale of University House Communities Group, Inc. ("University House"), its former student housing platform. Following the Highlands spin-off and sale of University House in 2016, the Company no longer has a non-core or student housing segment, respectively, as previously reported. In addition, the Company disposed of its remaining non-core office property, Worldgate Plaza, on August 30, 2017, which represented the conclusion of the Company's strategic shift away from wholly owned real estate assets not classified as multi-tenant retail. These previously reported segments were classified as discontinued operations as they represented a strategic shift that had a major effect on the Company's operations and financial results. Accordingly, the Company believes it has a single reportable segment for disclosure purposes in accordance with U.S. generally accepted accounting principles ("GAAP") as of December 31, 2018 . The operations reflected in discontinued operations on the consolidated statements of operations and comprehensive income for the year ended December 31, 2017 includes Worldgate Plaza and for the year ended December 31, 2016 also includes Highlands and University House.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Estimates, Risks, and Uncertainties The accompanying consolidated financial statements have been prepared in accordance with GAAP, which requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Significant estimates, judgments and assumptions are required in a number of areas, including, but not limited to, evaluating the impairment of long-lived assets, allocating the purchase price of acquired assets, determining the fair value of debt and evaluating the collectability of accounts receivable. The Company bases these estimates, judgments and assumptions on historical experience and various other factors that the Company believes to be reasonable under the circumstances. Actual results may differ from these estimates. Reclassifications The Company has made certain reclassifications to the consolidated statements of operations and comprehensive income for the years ended December 31, 2017 and 2016 to conform to the 2018 presentation, including a $3,706 and $4,877 reclassification, respectively, of certain payroll costs from general and administrative expenses to property operating expenses based on the determination by the Company that certain functions' activities were more directly associated with the operations of the retail properties than corporate-level activities. Upon the adoption of Accounting Standards Update ("ASU") No. 2016-18, Statement of Cash Flows , the Company has made certain reclassifications to the consolidated statements of cash flows for the years ended December 31, 2017 and 2016 to conform to the 2018 presentation. For the years ended December 31, 2017 and 2016, the adoption resulted in a net $9,194 decrease and $8,200 increase, respectively, in net cash provided by (used in) investing activities. In addition, the Company determined that the reflection of funds held in escrow for potential future property acquisitions as restricted cash most appropriately reflects the nature of the restrictions on the balances and underlying transactions; historically, the funds were recorded as deferred costs and other assets, net. This reclassification increased restricted cash on the consolidated balance sheets by $0 , $6,650 and $4,100 as of December 31, 2017, 2016 and 2015, respectively. As a result, the Company made certain reclassifications to the consolidated statements of cash flows for the years ended December 31, 2017 and 2016 to conform to the 2018 presentation, including a $6,650 decrease and $2,550 increase, respectively, in net cash provided by (used in) investing activities resulting from the reclassification of funds held in escrow for potential future property acquisitions. Consolidation The Company evaluates its investments in LLCs and LPs to determine whether each such entity may be a VIE. If the entity is a VIE, the determination of whether the Company is the primary beneficiary must be made. The primary beneficiary determination is based on a qualitative assessment as to whether the Company has (i) power to direct significant activities of the VIE and (ii) an obligation to absorb losses or the right to receive benefits that could be potentially significant to the VIE. The Company will consolidate a VIE if it is deemed to be the primary beneficiary, as defined in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 810, Consolidation . The equity method of accounting is applied to entities in which the Company is not the primary beneficiary as defined in ASC 810, or the entity is not a VIE and the Company does not have control, but can exercise influence over the entity with respect to its operations and major decisions. Investments in entities that the Company does not control and over which it does not exercise significant influence are carried at the lower of cost or estimated fair value, as appropriate. The Company’s ability to correctly assess control over an entity affects the presentation of these investments in the Company’s consolidated financial statements. From time to time, the Company may enter into purchase agreements structured as a reverse like-kind exchange under Section 1031 of the Internal Revenue Code of 1986, as amended (the "Code") ("Reverse 1031 Exchange") in order to acquire retail properties. For a Reverse 1031 Exchange in which the Company purchases a new asset that is similar in nature, character, or class prior to selling the asset to be matched in the like-kind exchange (the Company refers to a new asset being acquired in the Reverse 1031 Exchange prior to the sale of the related asset as a "Parked Asset"), legal title to the Parked Asset is held by a wholly owned subsidiary (the "EAT Subsidiary") of an Exchange Accommodation Titleholder ("EAT") engaged to execute the Reverse 1031 Exchange until the sale transaction and the Reverse 1031 Exchange is completed. The Company, through a subsidiary, enters into a master lease agreement with the EAT Subsidiary whereby the EAT Subsidiary leases the Parked Asset and all other rights in connection with the acquisition to the Company. The master lease terminates on the earlier of (i) the date that the Parked Asset is transferred to the Company, or an affiliate, (ii) the date that the EAT transfers to the Company, or an affiliate of the Company, its ownership in the EAT Subsidiary, or (iii) 180 days from the date that legal title to the Parked Asset was transferred to the EAT Subsidiary. The EAT is classified as a VIE, as it does not have sufficient equity investment at risk to finance its activities without additional subordinated financial support. The Company generally structures the purchase agreements in a manner which results in the Company being deemed the primary beneficiary as it has the ability to direct the activities of the entities that most significantly impact economic performance and has all of the risks and rewards of ownership. Accordingly, the Company consolidates properties acquired through active Reverse 1031 Exchanges. The Company may hold investment properties which consist of wholly owned multi-tenant retail space and an undivided interest in certain common elements as tenants-in-common. An undivided interest is an ownership arrangement in which two or more parties jointly own property, and title is held individually to the extent of each party’s interest. The ownership of the common elements are reviewed for control and, based upon ability to effectively participate in the decisions that most significantly impact economic performance, the Company may apply proportionate consolidation of the common elements. Real Estate The Company evaluates the inputs, processes and outputs of each asset acquired to determine if the transaction is a business combination or asset acquisition. If an acquisition qualifies as a business combination, the related transaction costs are recorded as an expense in the consolidated statements of operations and comprehensive income. If an acquisition qualifies as an asset acquisition, the related transaction costs are generally capitalized and amortized over the useful life of the acquired assets. The Company allocates the purchase price of real estate to land, building, other building improvements, tenant improvements, and intangible assets and liabilities (such as the value of above- and below-market leases, in-place leases and origination costs associated with in-place leases). The values of above- and below-market leases are recorded as intangible assets, net, and intangible liabilities, net, respectively, on the consolidated balance sheets, and are amortized as either a decrease (in the case of above-market leases) or an increase (in the case of below-market leases) to rental income over the remaining term of the associated tenant lease. The values, if any, associated with in-place leases are recorded in intangible assets, net on the consolidated balance sheets and are amortized to depreciation and amortization expense on the consolidated statements of operations and comprehensive income over the remaining lease term. The difference between the contractual rental rates and the Company’s estimate of market rental rates is measured over a period equal to the remaining non-cancelable term of the leases, including below-market renewal options, if reasonably assured. For the amortization period, the remaining term of leases with renewal options at terms below market reflect the assumed exercise of such below-market renewal options, if reasonably assured. If a tenant vacates its space prior to the contractual expiration of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible asset or liability is written off. Tenant improvements are depreciated and origination costs are amortized over the remaining term of the lease or charged against earnings if the lease is terminated prior to its contractual expiration date. The Company performs, with the assistance of a third-party valuation specialist, the following procedures for assets the Company acquires: • Estimate the value of the property "as if vacant" as of the acquisition date; • Allocate the value of the property among land, building, and other building improvements and determine the associated useful life for each; • Calculate the value and associated life of above- and below-market leases on a tenant-by-tenant basis. The difference between the contractual rental rates and the Company’s estimate of market rental rates is measured over a period equal to the remaining term of the leases (using a discount rate which reflects the risks associated with the leases acquired, including geographical location, size of leased area, tenant profile and credit risk); • Estimate the fair value of the tenant improvements, legal costs and leasing commissions incurred to obtain the leases and calculate the associated useful life for each; • Estimate the fair value of assumed debt, if any; and • Estimate the intangible value of the in-place leases based on lease execution costs of similar leases as well as lost rent payments during an assumed lease-up period and their associated useful lives on a tenant-by-tenant basis. As of January 1, 2018, the Company's derecognition of real estate and the related gains or losses on sale of investment properties are recognized when (i) the parties to the sale contract have approved the contract and are committed to perform their respective obligations; (ii) the Company can identify each party’s rights regarding the property transferred; (iii) the Company can identify the payment terms for the property transferred; (iv) the contract has commercial substance (that is, the risk, timing or amount of the entity’s future cash flows is expected to change as a result of the contract); and (v) the Company has satisfied its performance obligations by transferring control of the property. The timing of payment and satisfaction of performance obligations typically occur simultaneously on the disposition date upon transfer of the property’s ownership, at which point the Company recognizes a gain or loss equal to the difference between the amount of consideration transferred and the carrying amount of the investment property. Historically, the Company recognized gains and losses from sales of investment properties at the time of sale using the full accrual method based on the following criteria in ASC 360-20, Property, Plant and Equipment - Real Estate Sales : sales were consummated; usual risks and rewards of ownership were transferred to buyers; the Company had no substantial continuing involvement with the property; and any sales related receivables were not subject to future subordination. If these criteria were not all met, the Company deferred the gains and recognized them when the criteria were met. If the full accrual method was not followed, the Company used either the installment, deposit or cost recovery methods, as appropriate in the circumstances. Investment Properties Held for Sale In determining whether to classify an investment property as held for sale, the Company considers whether: (i) management has committed to a plan to sell the investment property; (ii) the investment property is available for immediate sale, in its present condition; (iii) the Company has initiated a program to locate a buyer; (iv) the Company believes that the sale of the investment property is probable; (v) the Company has received a significant non-refundable deposit for the purchase of the property; (vi) the Company is actively marketing the investment property for sale at a price that is reasonable in relation to its estimated fair value; and (vii) actions required for the Company to complete the plan indicate that it is unlikely that any significant changes will be made to the plan. If all of the above criteria are met, the Company classifies the investment property as held for sale. When these criteria are met, the Company suspends depreciation on the investment properties held for sale, including depreciation for tenant improvements and additions, as well as the amortization of acquired in-place and above/below-market lease intangibles. The properties held for sale and associated liabilities are classified separately on the consolidated balance sheets. Such properties are recorded at the lesser of the carrying value or estimated fair value less costs to sell. Additionally, if the sale represents a strategic shift that has (or will have) a major effect on the entity's results and operations, the operations are classified on the consolidated statements of operations and comprehensive income as discontinued operations for all periods presented. Impairment of Long Lived Assets The Company assesses the carrying values of the respective long-lived assets, whenever events or changes in circumstances indicate that the carrying amounts of these assets may not be fully recoverable, such as a reduction in the expected holding period of the asset. If it is determined that the carrying value is not recoverable because the expected undiscounted cash flows do not exceed carrying value, the Company records an impairment loss to the extent that the carrying value exceeds the estimated fair value. The valuation and possible subsequent impairment of investment properties is a significant estimate that can and does change based on the Company's continuous process of analyzing each property's economic condition at a point in time and reviewing assumptions about uncertain inherent factors, including observable inputs such as contractual revenues and unobservable inputs such as forecasted revenues and expenses, estimated net disposition proceeds, and discount rate. These unobservable inputs are based on market conditions and the Company's expected growth rates. However, assumptions and estimates about future cash flows and capitalization rates are complex and subjective. Changes in economic and operating conditions and the Company’s ultimate investment intent that occur subsequent to the impairment analyses could impact these assumptions and result in additional impairment of the investment properties. Periodically, management assesses whether there are any indicators that the carrying value of the Company’s investments in unconsolidated entities may be other than temporarily impaired. To the extent other-than-temporary impairment has occurred, the loss is measured as the excess of the carrying value of the investment over the estimated fair value of the investment. The estimated fair value of the investment is generally derived from the cash flows generated from the underlying real property investments of the investee. Real Estate Capitalization and Depreciation Real estate is reflected at cost less accumulated depreciation within investment properties on the consolidated balance sheets. Ordinary repairs and maintenance are expensed as incurred. Depreciation expense is computed using the straight-line method. Buildings within investment properties on the consolidated balance sheets are depreciated based upon an estimated useful life of 30 years and 5 - 15 years for furniture, fixtures and equipment and site improvements within building and other improvements on the consolidated balance sheets. Capital lease assets are amortized using the straight-line method over the shorter of the lease term or the useful life that would be assigned if the asset were owned. Capital lease amortization is included in depreciation and amortization on the consolidated statements of operations and comprehensive income. Tenant improvements are amortized on a straight-line basis over the lesser of the life of the tenant improvement or the lease term as a component of depreciation and amortization expense on the consolidated statements of operations and comprehensive income. Direct and indirect costs that are clearly related to the construction and improvements of investment properties are capitalized. Costs incurred for property taxes and insurance are capitalized during periods in which activities necessary to prepare the property for its intended use are in progress. Interest costs, if significant, are also capitalized during such periods. Additionally, the Company treats investments accounted for by the equity method as assets qualifying for interest capitalization, if significant, provided (i) the investee has activities in progress necessary to commence its planned principal operations and (ii) the investee’s activities include the use of such funds to acquire qualifying assets. The Company makes subjective assessments as to the useful lives of the Company’s assets. These assessments have a direct impact on the Company’s results of operations. Should the Company lengthen the expected useful life of an asset, it would be depreciated over a longer period, resulting in less annual depreciation expense and higher annual net income. Should the Company shorten the expected useful life of an asset, it would be depreciated over a shorter period resulting in more annual depreciation expense and lower annual net income. Cash and Cash Equivalents The Company considers all demand deposits, money market accounts and investments in certificates of deposit and repurchase agreements with a maturity of three months or less, at the date of purchase, to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions generally exceed the Federal Deposit Insurance Corporation ("FDIC") insurance coverage. As a result, there is what we believe to be insignificant credit risk related to amounts on deposit in excess of FDIC insurance coverage. Restricted Cash Restricted cash consists of lenders’ escrows, operating real estate (escrows for taxes, insurance, capital expenditures and payments required under certain lease agreements), and funds restricted through lender or other agreements, including funds held in escrow for future acquisitions and potential like-kind exchanges under Section 1031 of the Code. Derivative Instruments In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company’s objective in using interest rate derivatives is to manage its exposure to interest rate movements and add stability to interest expense. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. 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 agreement without exchange of the underlying notional amount. The Company has a policy of only entering into contracts with established financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from those instruments nor does it anticipate any material adverse effect on its net income or financial position in the future from the use of derivatives. The Company recognizes all derivatives on the consolidated balance sheets at fair value. Additionally, the fair value adjustments will affect either equity or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the underlying transaction is terminated or completed all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the criteria for hedge accounting is marked-to-market each period on the consolidated statements of operations and comprehensive income. The Company does not use derivatives for trading or speculative purposes. Fair Value Measurements The carrying amounts of cash and cash equivalents, restricted cash, accounts and rents receivables, other assets, accounts payable, accrued expenses and other liabilities reasonably approximate fair value, in management’s judgment, because of their short-term nature. Fair value information relating to marketable securities, derivative financial instruments, investment properties, investments in unconsolidated entities and debt is provided in "Note 10. Fair Value Measurements". Revenue Recognition The Company commences revenue recognition on its leases based on a number of factors. In most cases, revenue recognition under a lease begins when the lessee takes possession of, or controls the physical use of, the leased asset. Generally, this occurs on the lease commencement date. The determination of who is the owner, for accounting purposes, of the tenant improvements determines the nature of the leased asset and when revenue recognition under a lease begins. If the Company is the owner, for accounting purposes, of the tenant improvements, then the leased asset is the finished space and revenue recognition begins when the lessee takes possession of the finished space, typically when the improvements are substantially complete. If the Company concludes it is not the owner, for accounting purposes, of the tenant improvements (the lessee is the owner), then the leased asset is the unimproved space and any tenant improvement allowances funded under the lease are treated as lease incentives which reduce revenue recognized over the term of the lease. In these circumstances, the Company begins revenue recognition when the lessee takes possession of the unimproved space to construct their own improvements. The Company considers a number of different factors to evaluate whether it or the lessee is the owner of the tenant improvements for accounting purposes. These factors include: • whether the lease stipulates how and on what a tenant improvement allowance may be spent; • whether the tenant or landlord retains legal title to the improvements; • the uniqueness of the improvements; • the expected economic life of the tenant improvements relative to the length of the lease; and • who constructs or directs the construction of the improvements. The determination of who owns the tenant improvements, for accounting purposes, is subject to significant judgment. In making that determination, the Company considers all of the above factors. No one factor, however, is determinative. Rental income is recognized on a straight-line basis over the term of each lease. The cumulative difference between rental income earned and recognized on a straight-line basis on the consolidated statements of operations and comprehensive income and the cash rent due under the provisions of the lease agreements is recorded as deferred rent receivable and is included as a component of accounts and rents receivable in the accompanying consolidated balance sheets. Some leases provide for fixed base rent paid monthly in advance, and for the reimbursement by tenants to the Company for the tenant’s pro rata share of certain operating expenses including real estate taxes, special assessments, insurance, utilities, common area maintenance, management fees, and certain building repairs paid by the Company and recoverable under the terms of the lease. Under these leases, the Company pays all expenses and is reimbursed by the tenant for the tenant’s pro rata share of recoverable expenses paid. These expenses are included within property operating expenses and reimbursements are included in tenant recovery income on the consolidated statements of operations and comprehensive income. The Company records lease termination income when there is a signed termination agreement, all of the conditions of the termination agreement have been met, the tenant is no longer occupying the property and termination income amounts due are considered collectible. The Company defers recognition of contingent rental income (i.e. percentage/excess rent) until the specified target that triggers the contingent rental income is achieved. As a result of the adoption of ASC 606, Revenue from Contracts with Customers ("Topic 606"), the Company has changed its accounting policy from ASC 605, Revenue Recognition , ("Topic 605") for revenue recognized through other fee income on the consolidated statement of operations and comprehensive income. The Company adopted Topic 606 through the modified retrospective method on January 1, 2018. Therefore, the comparative prior period information has not been adjusted and continues to be reported under Topic 605. For the comparative prior period information reported under Topic 605, the Company recognized the fees as revenue when the related services were performed. The implementation of Topic 606 generally did not change the timing or pattern of revenue recognition for other fee income. As a result, there was no cumulative effect adjustment recognized in distributions in excess of accumulated net income on January 1, 2018 relating to other fee income. The Company has elected to apply Topic 606 to new and existing contracts that are not completed contracts as of January 1, 2018. Contract Balances The Company recognizes revenue when it satisfies a performance obligation. These rights to consideration most often result in receivables that are settled through recurring monthly customer payments for the services provided over the term of the contract. The Company generally does not receive prepayments for services or recognize revenue prior to being legally entitled to payment from the customer. As a result, the Company does not record material contract assets or contract liabilities. Property Management and Asset Management Fees The Company earns property management and asset management fees from services provided to our joint venture partnerships. Property management and asset management fees are recognized over time as services are rendered. The bundled services of the property management performance obligation and asset management performance obligation each qualify as a series of distinct services satisfied over time. The variable consideration related to each of the performance obligations is recognized in each of the periods that directly relate to the Company's efforts to provide those services. Accordingly, the Company has elected the optional exemption provided by Topic 606 and does not disclose information about remaining wholly unsatisfied performance obligations. The variability in timing of the property management and asset management fees, which generally relate to the fluctuation in cash receipts from tenants and potential changes in equity capitalization, are resolved on a monthly basis. For certain services, the Company acts as an agent on behalf of the customer to arrange for performance by a third party. Based on the Company's judgment, both the underlying asset management service activities and the underlying property management service activities are not distinct but are inputs (or fulfillment activities) to provide the combined output (either the overall asset management service or the overall property management service). Leasing Commissions and Other Fees The Company earns leasing commissions and other fees from services provided to our joint venture partnerships. Leasing commissions and other fees are recognized at a point in time consistent with the underlying service. The leasing performance obligation and other performance obligations are satisfied at the point in time which the customer is transferred control over and consumes the benefit of the service. The uncertainty of the leasing commissions and other fees are resolved upon delivery of the underlying service. Generally, the first and second installments of leasing commissions are paid upon lease executions and rent commencement, respectively. Income Taxes The Company is qualified and has elected to be taxed as a REIT under the Code for federal income tax purposes commencing with the tax year ended December 31, 2005. Since the Company qualifies for taxation as a REIT, the Company generally will not be subject to federal income tax on taxable income that is distributed to stockholders. In order to continue to qualify as a REIT, the Company is generally required to distribute at least 90% of its REIT taxable income (subject to certain adjustments) to its stockholders each year (the " 90% Distribution Requirement"). If the Company fails to qualify as a REIT in any taxable year, without the benefit of certain relief provisions, the Company will be subject to federal and state income tax on its taxable income at regular corporate tax rates. Even if the Company qualifies for taxation as a REIT, the Company may be subject to certain state and local taxes on its income, property or net worth and federal income and excise taxes on its undistributed income. The Company has elected to treat certain of its consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries ("TRSs") pursuant to the Code. Among other activities, TRSs may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to federal and state income tax at regular corporate tax rates. The Company accounts for income taxes using the asset and liability method under which deferred tax assets and liabilities are recognized for the estimated future tax consequences attributed to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. 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. Deferred tax assets are recognized only to the extent that it is more likely than not that they will be realized based on consideration of available evidence, including future reversal of existing taxable temporary differences, future projected taxable income, and tax-planning strategies. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. The Company's analysis in determining the deferred tax asset valuation allowance involves management judgment and assumptions. Share Based Compensation The Company recognizes the grant-date fair value of stock-based compensation issued to employees and directors in general and administrative expenses on the consolidated statements of operations and comprehensive income. The Company's stock-based compensation awards, which are generally equity classified, are measured at grant date fair value, and amortized on a straight-line basis over the vesting period and are not subsequently re-measured. At December 31, 2018, the Company had one share based compensation plan, which is discussed in "Note 13. Stock-Based Compensation". The compensation cost is based on awards that are scheduled to vest and adjusted for forfeitures at the time the forfeitures occur. Recently Issued Accounting Pronouncements Adopt

Acquired Properties

Acquired Properties	12 Months Ended
	Dec. 31, 2018
Asset Acquisition [Abstract]
Acquired Properties	Acquired Properties The following table reflects the retail properties acquired, accounted for as asset acquisitions, during the year ended December 31, 2018 : Acquisition Date Property Metropolitan Statistical Area ("MSA") Gross Acquisition Price Square Feet May 16, 2018 PGA Plaza (a) Miami-Fort Lauderdale-West Palm Beach, FL $ 88,000 120,000 May 30, 2018 Kennesaw Marketplace (a) Atlanta-Sandy Springs-Roswell, GA 64,300 117,000 September 13, 2018 Kennesaw Marketplace, Phase 3 Atlanta-Sandy Springs-Roswell, GA 7,500 13,000 December 13, 2018 Peachland Promenade, Phase 2 Cape Coral-Fort Myers, FL 18,700 95,000 December 21, 2018 Sandy Plains Centre (a) Atlanta-Sandy Springs-Roswell, GA 44,100 125,000 Total $ 222,600 470,000 (a) These acquisitions were made through three consolidated VIEs and used to facilitate Reverse 1031 Exchanges. During the last quarter of 2018, the title of PGA Plaza and Kennesaw Marketplace transferred to the Company through the completions of an exchange and expiration of the 180-day waiting period, respectively. The following table reflects the retail properties acquired, accounted for as asset acquisitions, during the year ended December 31, 2017 : Acquisition Date Property MSA Gross Acquisition Price Square Feet January 6, 2017 Campus Marketplace (a) San Diego-Carlsbad, CA $ 73,350 144,000 February 1, 2017 Paraiso Parc and Westfork Plaza Miami-Fort Lauderdale-West Palm Beach, FL 163,000 393,000 February 21, 2017 The Shops at Town Center Washington-Arlington-Alexandria, DC-VA-MD-WV 53,550 125,000 August 14, 2017 Cary Park Town Center Raleigh-Cary, NC 25,000 93,000 August 18, 2017 The Parke Austin-Round Rock, TX 112,250 364,000 August 18, 2017 The Plaza Midtown Atlanta-Sandy Springs-Roswell, GA 31,800 70,000 September 14, 2017 River Oaks (b) San Jose-Sunnyvale-Santa Clara, CA 115,000 275,000 September 21, 2017 Kyle Marketplace (b) Austin-Round Rock, TX 59,475 226,000 Total $ 633,425 1,690,000 (a) As part of this acquisition, the Company assumed mortgage debt of $41,717 as reported within non-cash financing activities on the consolidated statements of cash flows for the year ended December 31, 2017 . (b) These asset acquisitions were structured as Reverse 1031 Exchanges. During the first quarter of 2018, the title of Kyle Marketplace and River Oaks transferred to the Company through the completion of an exchange and expiration of the 180-day waiting period, respectively. The Company incurred transaction costs of $430 and $1,911 during the years ended December 31, 2018 and 2017, which were capitalized and included in building and other improvements on the Company's consolidated balance sheets. The following table summarizes the estimated fair value of the retail properties' assets acquired and liabilities assumed for the years ended December 31, 2018 and 2017: 2018 Acquisitions 2017 Acquisitions Land $ 40,435 $ 125,990 Building and other improvements 166,058 440,204 Total investment properties 206,493 566,194 Intangible assets (a) 21,584 69,306 Intangible liabilities (b) (6,215 ) (19,099 ) Net other assets and liabilities 738 17,024 Total fair value of assets acquired and liabilities assumed $ 222,600 $ 633,425 (a) Intangible assets include in-place leases and above-market leases. (b) Intangible liabilities include below-market leases.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Operating Leases The majority of revenue recognized from the Company’s retail properties consists of rents received under long-term operating leases. In addition to base rent paid monthly in advance, some leases provide for the reimbursement of the tenant’s pro rata share of certain operating expenses incurred by the landlord including real estate taxes, special assessments, insurance, utilities, common area maintenance, management fees and certain capital repairs, subject to the terms of the respective lease. Certain other tenants are subject to net leases which provide that the tenant is responsible for fixed base rent as well as all costs and expenses associated with occupancy. Under net leases where all expenses are paid directly by the tenant rather than the landlord, such expenses are not included in the consolidated statements of operations and comprehensive income. Under leases where all expenses are paid by the landlord, subject to reimbursement by the tenant, the expenses are included within property operating expenses or real estate taxes and reimbursements are included in tenant recovery income on the consolidated statements of operations and comprehensive income. The remaining lease terms range from one year to forty-one years . Minimum lease payments to be received under long-term operating leases and short-term specialty leases, excluding additional percentage rent based on tenants' sales volume and tenant reimbursements of certain operating expenses, and assuming no exercise of renewal options or early termination rights, are as follows: For the year ending December 31, Minimum Lease Payments 2019 $ 151,874 2020 139,290 2021 124,366 2022 103,204 2023 83,744 Thereafter 282,629 Total $ 885,107 Contracts with Customers During the years ended December 31, 2018, 2017 and 2016 , the Company earned other fee income of $4,390 , $4,222 , and $4,348 , respectively, which are fees derived from services provided to IAGM Retail Fund I, LLC ("IAGM"), an unconsolidated retail joint venture partnership between the Company as 55% owner and PGGM Private Real Estate Fund ("PGGM"), as disclosed in "Note 6. Investment in Consolidated and Unconsolidated Entities", and therefore deemed to be related party transactions. The property management, asset management, leasing and other services are provided over the term of the contract which has a remaining original duration through 2023. The Company had receivables of $778 , $515 and $513 as of December 31, 2018, 2017 and 2016, respectively, which are included in deferred costs and other assets, net on the consolidated balance sheets. The following table reflects the disaggregation of other fee income: Year Ended December 31, 2018 2017 2016 Property management fee $ 2,626 $ 2,794 $ 2,701 Asset management fee 1,080 1,213 1,213 Leasing commissions and other fees 684 215 434 Other fee income $ 4,390 $ 4,222 $ 4,348

Disposed Properties

Disposed Properties	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Disposed Properties	Disposed Properties Continuing operations The following retail properties were disposed of during the year ended December 31, 2018 : Date Property Square Feet Gross Disposition Price Gain (Loss) on Sale and Transfer of Investment Properties, net Gain (Loss) on Extinguishment of Debt (d) January 9, 2018 Sherman Town Center I & II 485,000 $ 63,000 $ 12,382 $ — January 25, 2018 Grafton Commons 239,000 33,500 6,564 — March 8, 2018 Lakeport Commons 283,000 31,000 (666 ) — March 21, 2018 Stonecrest Marketplace (a) 265,000 — 1,777 10,752 March 31, 2018 Northwest Marketplace (b) — — 248 — April 17, 2018 Market at Morse/Hamilton 45,000 10,000 1,592 — May 24, 2018 Siegen Plaza 156,000 29,000 3,849 (54 ) June 20, 2018 Tomball Town Center 67,000 22,750 7,184 — June 26, 2018 Bellerive Plaza (c) 76,000 — (22 ) 1,694 June 28, 2018 Parkway Centre North 143,000 23,700 5,357 (1,695 ) September 14, 2018 Tulsa Hills 473,000 70,000 13,476 — October 5, 2018 McKinney Town Center 243,000 51,000 15,430 — October 5, 2018 Riverstone Shopping Center 273,000 27,750 (320 ) (1,540 ) October 23, 2018 Hiram Pavilion 363,000 44,350 22,124 — November 19, 2018 Poplin Place 228,000 28,300 2,841 — November 20, 2018 Walden Park 34,000 5,325 5 — December 20, 2018 Streets of Cranberry 108,000 26,500 3,276 — 3,481,000 $ 466,175 $ 95,097 $ 9,157 (a) On March 21, 2018, the Company surrendered Stonecrest Marketplace, with a carrying value of $23,932 , to the lender in satisfaction of non-recourse debt with an initial maturity date of March 1, 2017 and recognized a gain on transfer of assets, net, of $1,777 . The Company is not aware of any material outstanding commitments and contingencies related to Stonecrest Marketplace. (b) The Company recognized a gain on sale of $248 related to the completion of a partial condemnation at this retail property. (c) On June 26, 2018, the Company surrendered Bellerive Plaza, with a carrying value of $4,771 , to the lender in satisfaction of non-recourse debt with an initial maturity date of June 1, 2017. The Company recognized a loss on transfer of assets, net, of $22 . The Company is not aware of any material outstanding commitments and contingencies related to Bellerive Plaza. (d) In addition to the gain or loss on extinguishment of debt recognized as a result of the disposition of retail properties, the Company extinguished an additional loan on a retail property resulting in a loss on debt extinguishment of $4 . In aggregate, the Company recognized net proceeds of $430,514 from the sales, surrender, and condemnation of these retail properties on the consolidated statement of cash flows during the year ended December 31, 2018 . The following retail properties were disposed of during the year ended December 31, 2017 : Date Property Square Feet Gross Disposition Price Gain (Loss) on Sale and Transfer of Investment Properties, net Gain (Loss) on Extinguishment of Debt January 10, 2017 Penn Park 242,000 $ 29,050 $ 1,021 $ — May 17, 2017 Intech Retail (a) — — (52 ) 882 May 19, 2017 Sparks Crossing 336,000 40,280 10,559 — June 23, 2017 Lincoln Village 164,000 30,000 2,355 — June 30, 2017 Market at Westlake (b) — — 473 — July 31, 2017 Pavilions at Hartman Heritage 223,000 21,700 (1,736 ) — July 31, 2017 Legacy Crossing 134,000 10,250 (211 ) (1 ) September 28, 2017 Heritage Plaza 132,000 21,350 9,189 (41 ) November 7, 2017 Crossroads at Chesapeake (c) — 1,250 834 — December 21, 2017 Scofield Crossing (d) — 2,936 2,247 — December 28, 2017 Dothan Plaza 327,000 33,750 (613 ) — 1,558,000 $ 190,566 $ 24,066 $ 840 (a) On May 17, 2017, the Company surrendered Intech Retail, with a carrying value of $2,338 , to the lender in satisfaction of non-recourse debt with an initial maturity date of November 1, 2016 and recognized a loss on transfer of assets, net, of $52 . The Company is not aware of any material outstanding commitments and contingencies related to Intech Retail. (b) The Company recognized a gain on sale of $473 related to the completion of a partial condemnation at this retail property. (c) The Company recognized a gain on sale of $834 from the disposal of a single-user outparcel at this retail property. (d) The Company recognized a gain on sale of $2,247 from the disposal of a single-user outparcel at this retail property. In aggregate, the Company recognized net proceeds of $233,686 from the sales, surrender, and condemnation of these retail properties and the disposition of Worldgate Plaza on the consolidated statement of cash flows during the year ended December 31, 2017. Discontinued operations On August 30, 2017, the Company sold Worldgate Plaza for a gross disposition price of $53,500 , and recognized a gain on the sale of this property of $10,115 as part of income from discontinued operations on the 2017 consolidated statements of operations and comprehensive income. Discontinued operations for the year ended December 31, 2016 also includes Highlands and University House. Year ended December 31, 2017 2016 Total income $ 3,935 $ 92,329 Depreciation and amortization expense 1,205 32,667 Other expenses 2,308 36,487 Provision for asset impairment — 106,514 Operating income (loss) from discontinued operations 422 (83,339 ) Interest expense, income taxes, and other miscellaneous income (6,696 ) (17,983 ) Equity in losses of unconsolidated entity — (19 ) Gain on sale of investment in unconsolidated entity — 1,434 Gain on sale of properties, net 10,115 236,256 Loss on extinguishment of debt (2 ) (2,826 ) Net income from discontinued operations 3,839 133,523 Net income from discontinued operations attributable to Company $ 3,839 $ 133,523 Weighted average number of common shares outstanding, basic and diluted 773,445,341 854,638,497 Net income per common share, from discontinued operations, basic and diluted $ — $ 0.15

Investment in Consolidated and

Investment in Consolidated and Unconsolidated Entities	12 Months Ended
	Dec. 31, 2018
Investment in Partially Owned Entities [Abstract]
Investment in Consolidated and Unconsolidated Entities	Investment in Consolidated and Unconsolidated Entities Consolidated Entities At December 31, 2018, Sandy Plains Centre was the Company's only VIE through an active Reverse 1031 Exchange. As of December 31, 2017, River Oaks and Kyle Marketplace were the Company's only VIEs through active Reverse 1031 Exchanges. The following were the assets and liabilities of the consolidated VIEs. The liabilities of the VIEs are not recourse to the Company, and the assets must be used first to settle obligations of the VIEs. December 31, 2018 December 31, 2017 Net investment properties $ 39,634 $ 165,875 Other assets 4,457 18,630 Total assets 44,091 184,505 Other liabilities 385 11,343 Total liabilities 385 11,343 Net assets $ 43,706 $ 173,162 During the year ended December 31, 2017, the Company acquired The Plaza Midtown (see "Note 4. Acquired Properties"), consisting of wholly owned multi-tenant retail space, and an undivided interest in certain common elements as tenants-in-common. The common elements primarily consist of a parking garage adjacent to the wholly owned multi-tenant retail space. The ownership of The Plaza Midtown's common elements was deemed to not be subject to joint control, as the other tenant-in-common lacked the ability to effectively participate in the decisions that most significantly impact economic performance of The Plaza Midtown's common elements. Accordingly, the Company has applied proportionate consolidation of the common elements. The parking garage had an estimated proportionate fair value of $10,790 , which has been recognized in land and building and other improvements of $1,963 and $8,827 , respectively, as of the acquisition date. All intercompany transactions and balances have been eliminated in consolidation. Unconsolidated Entities The entities listed below are owned by the Company and other unaffiliated parties in joint ventures. Net income, distributions and capital transactions for these entities are allocated to the Company and its joint venture partners in accordance with the respective partnership agreements. The Company analyzed the joint venture agreements and determined that the joint ventures were not VIEs. The Company also considered the joint venture partners' participating rights under the joint venture agreements and determined that the joint venture partners have the ability to participate in major decisions, which equates to shared decision making. Accordingly, the Company has significant influence but does not control the joint ventures. Therefore, these joint ventures are not consolidated by the Company and the equity method of accounting is used to account for these investments. Under the equity method of accounting, the net equity investment of the Company and the Company's share of net income or loss from the unconsolidated entity are reflected in the consolidated balance sheets and the consolidated statements of operations and comprehensive income. Carrying Value of Investment at December 31, Entity Description Ownership % 2018 2017 IAGM Retail Fund I, LLC (a) Multi-tenant retail shopping centers 55% $ 126,195 $ 123,693 Downtown Railyard Venture, LLC (b) Land development 90% 30,049 57,183 Other unconsolidated entities Various real estate investments Various (112 ) (112 ) $ 156,132 $ 180,764 (a) On April 17, 2013 , the Company entered into a joint venture, IAGM, for the purpose of acquiring, owning, managing, supervising, and disposing of properties and sharing in the profits and losses from those properties and its activities. The Company is the managing member of IAGM, responsible for the day-to-day activities and earns fees for venture management, property management, leasing and other services provided. The Company contributed 14 properties to IAGM during the year ended December 31, 2013, and treated the contribution as a partial sale under ASC 360-20, Property, Plant and Equipment - Real Estate Sales, and deferred an aggregate gain of $15,625 as a result of the property sales into the joint venture. Through December 31, 2017, the Company was amortizing the basis adjustment over 30 years , consistent with the depreciation period of the investee's underlying assets. In accordance with the provisions of ASU No. 2017-05, full gain recognition may be required for property sales in which the Company has continuing involvement, where those gains may have been deferred under prior GAAP. As of January 1, 2018, with the adoption of ASU No. 2017-05, the Company's remaining $12,756 of the aforementioned deferred gain has been recognized through beginning distributions in excess of accumulated net income. (b) On September 30, 2015 , the Company was admitted as a member to Downtown Railyard Venture, LLC ("DRV"), which is a joint venture established in order to develop and sell a land development in Sacramento, California. Simultaneously, the Company structured and closed the sale of a non-core land development to DRV, which for accounting purposes is treated as a contribution of the land development to DRV in exchange for an equity interest of $46,174 in DRV. Concurrent with the formation of the joint venture, and included in the basis of the Company's investment in DRV, the Company established an $18,088 loan to DRV at a 4.0% interest rate, compounded annually. The loan matures on June 30, 2023. The Company's ownership percentage in DRV is based upon a waterfall calculation outlined in the operating agreement. The joint venture partner is the developer and managing member of DRV, responsible for the day-to-day activities and earns fees for managing the venture. During the year ended December 31, 2018, the Company recorded an other-than-temporary impairment of $29,933 on DRV, as disclosed in "Note 10. Fair Value Measurements." During the years ended December 31, 2017 and 2016, the Company recorded no impairment on its unconsolidated entities. During the year ended December 31, 2017, the Company received a final distribution from one unconsolidated entity of $366 , which reduced the Company's investment in the unconsolidated entity to zero as of December 31, 2017. No gain or loss was recognized as part of the transaction. During the year ended December 31, 2016, a gain on the sale of a joint venture for the development of a student housing community of $1,434 was recorded and is included as part of net income from discontinued operations on the consolidated statements of operations and comprehensive income as the Company's exit from the student housing market is a strategic shift that has had a major effect on the Company's operations and financial results. During the year ended December 31, 2018, IAGM recognized a provision for asset impairment of $3,673 on three retail properties and a loss on sale of $4,135 on two retail properties. For the year ended December 31, 2018, the Company's share of IAGM's provision for asset impairment and loss on sale was $2,020 and $2,274 , respectively. Combined Financial Information The following tables present the combined financial information for the Company’s investments in unconsolidated entities. As of December 31, 2018 December 31, 2017 (unaudited) (unaudited) Assets: Real estate assets, net of accumulated depreciation $ 494,583 $ 586,671 Other assets 103,565 73,423 Total assets 598,148 660,094 Liabilities and equity: Mortgage debt, net 272,629 311,574 Other liabilities 42,569 49,032 Equity 282,950 299,488 Total liabilities and equity 598,148 660,094 Company’s share of equity 185,814 193,572 Impairment of investment in unconsolidated entity (29,933 ) — Cost of investments in excess of the Company's share of underlying net book value, net of accumulated amortization of $0 and $2,647, respectively. 251 (12,808 ) Carrying value of investments in unconsolidated entities $ 156,132 $ 180,764 Year ended December 31, 2018 2017 2016 (unaudited) (unaudited) (unaudited) Revenues $ 58,322 $ 62,367 $ 70,385 Expenses: Depreciation and amortization 21,001 26,860 27,209 Operating expenses, ground rent and general and administrative expenses 19,732 22,304 21,671 Provision for asset impairment 3,673 4,745 — Total operating expenses 44,406 53,909 48,880 Operating income 13,916 8,458 21,505 Interest expense and loan cost amortization (13,205 ) (13,419 ) (13,015 ) (Loss) gain on sale of real estate (4,123 ) 434 — Loss on debt extinguishment (20 ) — — Net (loss) income $ (3,432 ) $ (4,527 ) $ 8,490 Company's share of net (loss) income, net of excess basis depreciation of $0, $520, and $520, respectively $ (1,870 ) $ (1,930 ) $ 4,109 Distributions from unconsolidated entities in excess of the investments' carrying value 410 1,126 5,190 Impairment of investment in unconsolidated entity (29,933 ) — — Equity in (losses) earnings and (impairment), net, of unconsolidated entities $ (31,393 ) $ (804 ) $ 9,299 The following table shows the scheduled maturities of the Company's unconsolidated entities' total third party mortgage debt of $275,308 as of December 31, 2018 , for each of the next five years, and thereafter: Maturities during the year ending December 31, 2019 2020 2021 2022 2023 Thereafter Total Mortgages payable $ 31,353 $ — $ 23,150 $ — $ 180,125 $ 40,680 $ 275,308 On June 30, 2018, IAGM entered into a one year extension on a non-recourse mortgage loan with a balance of $15,103 related to one retail property. On October 5, 2018, IAGM disposed of Victory Lakes Shopping Center and used proceeds from the sale to extinguish $38,300 of mortgages payable at two retail properties maturing in 2018 and pay down $3,830 of mortgages payable at six retail properties. On November 2, 2018, IAGM entered into a senior secured term loan facility of $152,000 to refinance its mortgages payable maturing in 2018. The senior secured term loan facility matures in November 2023 and contains two twelve-month extension options that IAGM may exercise upon payment of an extension fee equal to 0.10% of the total commitment amount on the first day of the extension term and subject to certain other conditions. The senior secured term loan facility bears interest at a rate equal to the London Inter-bank Offered Rate ("LIBOR") daily floating rate plus 1.55% and requires the maintenance of certain financial covenants. As a result of the refinance, the outstanding mortgages payable increased $5,205 . As a result of this refinance, no IAGM mortgages payable are recourse to the Company. It is anticipated that the joint ventures will be able to repay, refinance or extend all of their debt on a timely basis.

Investment in Marketable Securi

Investment in Marketable Securities	12 Months Ended
	Dec. 31, 2018
Investments, All Other Investments [Abstract]
Investment in Marketable Securities	Investment in Marketable Securities The Company sold substantially all remaining marketable securities during the year ended December 31, 2018. Investment in marketable securities of $4,758 at December 31, 2017 consisted primarily of preferred and common stock investments in other REITs and certain real estate related bonds which are classified as available-for-sale securities and recorded at fair value. The cost basis, net of impairments of available-for-sale securities, was $4,482 at December 31, 2017. Prior to the adoption of ASU No. 2016-01 on January 1, 2018, changes in the fair value of the Company's marketable securities, representing unrealized holding gains and losses on available-for-sale securities, were reported as a separate component of comprehensive income until realized. As of December 31, 2017 and 2016, the Company reported net accumulated comprehensive income related to its marketable securities of $275 and $58,572 , respectively, which includes gross unrealized losses of $72 and $598 , respectively. Securities with gross unrealized losses have a related fair value of $3,276 as of December 31, 2017. During the year ended December 31, 2016, an other-than-temporary impairment to available-for-sale securities of $1,327 was recorded on one security which is included as a component of realized and unrealized investment gains and (impairment), net on the consolidated statements of operations and comprehensive income. During the year ended December 31, 2017 the Company recorded no impairment on available-for-sale securities. Dividend income is recognized when received. During the years ended December 31, 2018, 2017 and 2016 , dividend income from marketable securities of $181 , $2,857 and $10,490 , respectively, was recognized and is included as a part of continuing operations in interest and dividend income on the consolidated statements of operations and comprehensive income.

Intangible Assets, Liabilities,

Intangible Assets, Liabilities, and Deferred Leasing Costs	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, Liabilities, and Deferred Leasing Costs	Intangible Assets, Liabilities, and Deferred Leasing Costs The following table summarizes the Company’s identified intangible assets, liabilities, and deferred leasing costs as of December 31, 2018 and 2017 . As of December 31, 2018 2017 Intangible assets: Acquired in-place leases $ 156,004 $ 226,515 Acquired above-market leases 22,353 29,670 Intangible assets 178,357 256,185 Accumulated amortization: Accumulated amortization, acquired in-place leases (58,203 ) (123,043 ) Accumulated amortization, above-market leases (12,149 ) (17,731 ) Accumulated amortization (70,352 ) (140,774 ) Intangible assets, net $ 108,005 $ 115,411 Intangible liabilities: Acquired below-market leases $ 74,312 $ 80,862 Accumulated amortization, acquired below-market leases (27,327 ) (27,330 ) Intangible liabilities, net $ 46,985 $ 53,532 Deferred leasing costs: Leasing costs $ 18,236 $ 17,355 Accumulated amortization (8,018 ) (8,642 ) Deferred leasing costs, net $ 10,218 $ 8,713 The values of above-market leases are recorded as intangible assets, net, on the consolidated balance sheets, and are amortized as a decrease to rental income over the remaining term of the associated tenant lease. The values, if any, associated with in-place leases are recorded in intangible assets, net on the consolidated balance sheets, and are amortized to depreciation and amortization expense on the consolidated statements of operations and comprehensive income over the remaining term of the associated tenant lease. The values of below-market leases are recorded as intangible liabilities, net, on the consolidated balance sheets and are amortized as an increase to rental income over the remaining term of the associated tenant lease. The difference between the contractual rental rates and the Company's estimate of market rental rates is measured over a period equal to the remaining non-cancelable term of the leases, including below-market renewal options, if reasonably assured. For the amortization period, the remaining term of leases will include renewal options that are at terms below-market if it is reasonably assured the options will be exercised. The values of deferred leasing costs are recorded as deferred costs and other assets, net on the consolidated balance sheets and are amortized to depreciation and amortization expense on the consolidated statements of operations and comprehensive income over the remaining term of the associated tenant lease. The following table provides a summary of the amortization related to intangible assets, liabilities, and deferred leasing costs for the years ended December 31, 2018, 2017 and 2016 : Year ended December 31, 2018 2017 2016 Intangible assets: In-place lease intangibles (a) $ 22,523 $ 22,580 $ 18,298 Above-market leases (b) 3,036 3,053 2,581 Amortization of intangible assets $ 25,559 $ 25,633 $ 20,879 Intangible liabilities: Amortization of below-market leases (c) $ 8,570 $ 8,563 $ 6,676 Deferred leasing costs: Amortization of deferred leasing costs (a) $ 2,036 $ 1,806 $ 1,703 (a) Amounts are recorded as depreciation and amortization. (b) Amounts are recorded as a reduction to rental income. (c) Amounts are recorded as an increase to rental income. The following table provides a summary of the amortization during the next five years and thereafter related to deferred costs and intangible assets and liabilities as of December 31, 2018 : Year ending December 31, In-place leases Above market leases Deferred leasing costs Below market leases 2019 $ 19,243 $ 2,220 $ 2,475 $ 7,349 2020 16,114 1,870 1,724 6,596 2021 12,794 1,512 1,581 5,578 2022 9,742 982 1,369 4,478 2023 8,000 777 966 3,438 Thereafter 31,908 2,843 2,103 19,546 Total $ 97,801 $ 10,204 $ 10,218 $ 46,985

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt As of December 31, 2018 , the Company's total debt, net, was $561,782 , which consists of mortgages payable, net, of $212,927 and credit agreements, net, of $348,855 . The Company believes that it has the ability to repay, refinance or extend any of its debt, and that it has adequate sources of funds to meet short-term cash needs related to its mortgages payable and credit agreements. It is anticipated that the Company will use proceeds from property sales, cash on hand, and available capacity on credit agreements, if any, to repay, refinance or extend the mortgages payable maturing in the near term. Mortgages payable As of December 31, 2018 and 2017, the Company had the following mortgages payable outstanding: December 31, 2018 December 31, 2017 Mortgages payable (a) $ 213,925 $ 370,804 Premium, net of accumulated amortization 239 478 Discount, net of accumulated amortization (158 ) (195 ) Debt issuance costs, net of accumulated amortization (1,079 ) (1,611 ) Total mortgages payable, net $ 212,927 $ 369,476 (a) Mortgages payable had fixed interest rates ranging from 3.49% to 5.49% , with a weighted average interest rate of 4.33% as of December 31, 2018 , and 3.49% to 10.45% (for both conforming loans and loans in default), with a weighted average interest rate of 5.13% as of December 31, 2017 . Some of the mortgage loans require compliance with certain covenants, such as debt service coverage ratios, investment restrictions and distribution limitations. As of December 31, 2018 , the Company was in compliance with all mortgage loan requirements. As of December 31, 2017, the Company was in compliance with all mortgage loan requirements except two non-recourse loans in default and receivership, Stonecrest Marketplace and Bellerive Plaza. During the year ended December 31, 2018, these properties were surrendered to the lender in satisfaction of non-recourse debt as disclosed in "Note 5. Disposed Properties". The following table shows the scheduled maturities of the Company's mortgages payable as of December 31, 2018, for each of the next five years, and thereafter: Maturities during the year ending December 31, 2019 2020 2021 2022 2023 Thereafter Total Mortgages payable $ — $ 41,000 $ 12,557 $ 50,748 $ 41,740 $ 67,880 $ 213,925 Credit agreements Unsecured term loans On December 21, 2018, the Company entered into an amended and restated unsecured term loan credit agreement with a syndicate of lenders led by Wells Fargo Bank, National Association, as administrative agent (the "Term Loan Agreement"). The Term Loan Agreement, which amends and restates the Company’s prior term loan agreement in its entirety, provides for $400,000 in unsecured term loans. The Term Loan Agreement consists of two tranches of term loans: a $250,000 5 -year tranche maturing on December 21, 2023 and a $150,000 5.5 -year tranche maturing on June 21, 2024. Interest rates are based on the Company's total leverage ratio or, at the Company's one-time irrevocable option, upon achievement of an investment grade credit rating. Based upon the Company's total leverage ratio, as of December 31, 2018, the outstanding 5 -year tranche loans bear interest at a rate of 1-Month LIBOR plus 1.20% and the outstanding 5.5 -year tranche loans bear interest at a rate of 1-Month LIBOR plus 1.20% . An unused fee is charged on the unused portion of the term loans at a rate ranging from 0.15% to 0.25% depending on the Company’s total leverage ratio. Based on the Company's total leverage ratio, as of December 31, 2018, the unused fee was 0.15% . As of the closing date of the Term Loan Agreement, the Company borrowed $226,000 under the 5 -year tranche and $126,000 under the 5.5 -year tranche, of which $26,000 from each tranche was used to pay off a $52,000 outstanding unsecured revolving line of credit balance that was borrowed on July 12, 2018. As of December 31, 2018, the Company had $24,000 available for borrowing under the 5 -year tranche and $24,000 available for borrowing under the 5.5 -year tranche. On November 5, 2015 , the Company entered into a term loan credit agreement for a $300,000 unsecured credit facility with an accordion feature that allowed the Company to increase the size of the unsecured term loan credit facility to $600,000 , subject to certain conditions. The term loan credit facility is subject to maintenance of certain financial covenants. As of December 31, 2017, the Company was in compliance with all of the covenants and default provisions under the credit agreement. Unsecured revolving line of credit On December 21, 2018, the Company entered into a second amended and restated unsecured revolving credit agreement with a syndicate of lenders led by KeyBank National Association, as administrative agent (the "Revolving Credit Agreement"). The Revolving Credit Agreement, which amends and restates the Company’s prior revolving credit agreement in its entirety, provides for a $350,000 unsecured revolving line of credit. The Revolving Credit Agreement has a 4 -year term maturing on December 21, 2022 with two six month extension options. Interest rates are based on the Company's total leverage ratio or, at the Company's one-time irrevocable option, upon achievement of an investment grade credit rating. Based upon the Company's total leverage ratio, as of December 31, 2018, outstanding revolving loans bear interest at a rate of LIBOR plus 1.05% . A facility fee accrues on the aggregate commitments at a rate ranging from 0.15% to 0.30% depending on the Company’s total leverage ratio. Based on the Company's total leverage ratio, as of December 31, 2018, the facility fee was 0.15% . As of December 31, 2018, the Company had $350,000 available for borrowing under the Revolving Credit Agreement. On February 3, 2015 , the Company entered into an amended and restated credit agreement for a $300,000 unsecured revolving line of credit with an accordion feature that allows the Company to increase the size of its unsecured line of credit up to $600,000 , subject to certain conditions. The unsecured revolving line of credit matures on February 2, 2019 and contains one twelve -month extension option that the Company may exercise upon payment of an extension fee equal to 0.15% of the commitment amount on the maturity date and subject to certain other conditions. The unsecured revolving line of credit bears interest at a rate equal to 1-Month LIBOR plus 1.40% and requires the maintenance of certain financial covenants. On July 12, 2018, the Company drew $52,000 on the unsecured revolving line of credit to repay some of the Company's mortgages payable. As of December 31, 2018 , the Company had the following borrowings outstanding under its unsecured term loans: Principal Balance Interest Rate Maturity Date $250.0 million 5 year - swapped to fixed rate (a) $ 90,000 2.5510% December 21, 2023 $250.0 million 5 year - swapped to fixed rate (b) 60,000 2.5525% December 21, 2023 $250.0 million 5 year - variable rate (c) 50,000 3.5493% December 21, 2023 $250.0 million 5 year - variable rate (d) 26,000 3.6794% December 21, 2023 $150.0 million 5.5 year - variable rate (c) 100,000 3.5493% June 21, 2024 $150.0 million 5.5 year - variable rate (d) 26,000 3.6794% June 21, 2024 Total unsecured term loans 352,000 Issuance costs, net of accumulated amortization (e) (3,145 ) Total outstanding credit agreements, net $ 348,855 (a) The Company swapped $90,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.2% to a fixed rate of 2.5510% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $90,000 . (b) The Company swapped $60,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.2% to a fixed rate of 2.5525% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $60,000 . (c) Interest rate reflects 1-Month LIBOR plus 1.20% as of December 3, 2018. (d) Interest rate reflects 1-Month LIBOR plus 1.20% as of December 21, 2018. (e) Reflects issuance costs, net of accumulated amortization, of $1,966 related to the December 21, 2018 term loans, and $1,179 related to the November 5, 2015 term loans. In accordance with the Company's accounting policy for debt modification, the Company did not write-off the issuance costs associated with the modification of the November 5, 2015 term loans as it did not meet the criteria of a substantial modification. As of December 31, 2017, the Company had the following borrowings outstanding under its unsecured term loan: Principal Balance Interest Rate Maturity Date 5 year - swapped to fixed rate (a) $ 90,000 2.6510% January 15, 2021 5 year - swapped to fixed rate (b) 60,000 2.6525% January 15, 2021 5 year - variable rate (c) 50,000 2.6607% January 15, 2021 7 year - variable rate (d) 100,000 2.9607% November 5, 2022 Total unsecured term loans 300,000 Issuance costs, net of accumulated amortization (1,615 ) Total outstanding credit agreements, net $ 298,385 (a) The Company swapped the $90,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.3% to a fixed rate of 2.6510% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $90,000 . (b) The Company swapped $60,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.3% to a fixed rate of 2.6525% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $60,000 . (c) Interest rate reflects 1-Month LIBOR plus 1.3% as of December 31, 2017. (d) Interest rate reflects 1-Month LIBOR plus 1.6% as of December 31, 2017. For the years ending December 31, 2018 and 2017, each of the Company's interest rate swaps are in an asset position and included within deferred costs and other assets, net on the accompanying consolidated balance sheets. The Company has designated these interest rate swaps as cash flow hedges. The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements: Location and amount of gain recognized in accumulated comprehensive income Location and amount of gain (loss) reclassified from accumulated comprehensive income into net income Total interest expense presented in the consolidated statements of operations in which the effects of cash flow hedges are recorded 2018 2017 2016 2018 2017 2016 2018 2017 2016 Unrealized gain on derivatives $ 923 1,183 623 Interest expense, net $ 956 (423 ) (1,295 ) Interest expense, net $ 24,943 30,155 44,135 As the Company's interest rate swaps have a termination date of December 1, 2019 , all net deferred amounts in accumulated comprehensive income will be reclassified into earnings during the next 11 months. As of December 31, 2018 and 2017 , the Company's interest rate swap agreements had a notional value of $150,000 .

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements In accordance with ASC 820, Fair Value Measurement and Disclosures , the Company defines fair value based on the price that would be received upon sale of an asset or the exit price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company uses a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value. The fair value hierarchy consists of the three broad levels described below: • Level 1 - Quoted prices in active markets for identical assets or liabilities that the entity has the ability to access. • Level 2 - Observable inputs, other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. • Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets and liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs. The Company has estimated the fair value of its financial and non-financial instruments using available market information and valuation methodologies the Company believes to be appropriate for these purposes. Considerable judgment and a high degree of subjectivity are involved in developing these estimates and, accordingly, they are not necessarily indicative of amounts that would be realized upon disposition. Recurring Measurements For assets and liabilities measured at fair value on a recurring basis, quantitative disclosure of the fair value for each major category of assets and liabilities is presented below: Fair Value Measurements at December 31, 2018 Level 1 Level 2 Level 3 Derivative interest rate swaps $ — $ 1,637 $ — Total assets $ — $ 1,637 $ — Fair Value Measurements at December 31, 2017 Level 1 Level 2 Level 3 Available-for-sale marketable securities $ 4,431 $ — $ — Real estate related bonds — 327 — Derivative interest rate swaps — 1,670 — Total assets $ 4,431 $ 1,997 $ — Level 1 At December 31, 2018, the Company had no level one recurring fair value measurements. At December 31, 2017 the fair value of the marketable equity securities has been determined based upon quoted market prices. Level 2 To calculate the fair value of the real estate related bonds and the derivative interest rate instruments, the Company primarily uses quoted prices for similar securities and contracts. For the real estate related bonds, the Company reviews price histories for similar market transactions. For the derivative interest rate instruments, the Company uses inputs based on data that is observed in the forward yield curve that is widely observable in the marketplace. The Company also incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements which utilizes Level 3 inputs, such as estimates of current credit spreads. As of December 31, 2018 and 2017 , the Company determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company's derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Level 3 At December 31, 2018 and 2017 , the Company had no level three recurring fair value measurements. Non-Recurring measurements Investment properties, continuing operations During the year ended December 31, 2018, the Company identified three retail properties that had reductions in the expected holding periods. The Company's estimated fair value was based on executed purchase contracts. The Company recorded a provision for asset impairment of $3,510 on three retail properties on the consolidated statement of operations and comprehensive income for the year ended December 31, 2018. During the year ended December 31, 2017, the Company identified certain retail properties that had reductions in the expected holding periods and reviewed the probability of these properties' disposition. The Company's estimated fair value relating to the investment retail properties' impairment analyses were based on, as applicable to the particular retail property, purchase contracts, broker opinions of value, letters of intent and 10 -year discounted cash flow models, which include estimated inflows and outflows over a specific holding period and estimated net disposition proceeds at the end of the 10 -year period. The discounted cash flow models consist of observable inputs such as contractual revenues and unobservable inputs such as forecasted revenues and expenses and estimated net disposition proceeds at the end of the 10 -year period. These unobservable inputs are based on market conditions and the Company’s expected growth rates. Capitalization rates ranging from 7.00% to 8.00% and discount rates ranging from 8.00% to 9.00% were utilized in the 10 -year discounted cash flow model and were based upon observable rates that the Company believed to be within a reasonable range of current market rates. As a result of these analyses, the Company recorded a provision for asset impairment of $27,754 on six retail properties on the consolidated statement of operations and comprehensive income for the year ended December 31, 2017. During the year ended December 31, 2016, the Company identified certain retail properties that had reductions in the expected holding period and reviewed the probability of these properties' disposition. The Company's estimated fair value relating to the investment properties' impairment analyses were based on, as applicable to the particular retail property, purchase contracts and a 10 -year discounted cash flow model. Capitalization rates ranging from 6.00% to 7.00% and discount rates ranging from 7.00% to 8.00% were utilized in the 10 -year discounted cash flow model and were based upon observable rates that the Company believed to be within a reasonable range of current market rates. As a result of these analyses, the Company recorded a provision for asset impairment of $11,208 on three retail properties on the consolidated statement of operations and comprehensive income for the year ended December 31, 2016. Investment properties, discontinued operations In connection with the Highlands spin-off in 2016, the Company evaluated Highlands as a disposal group for impairment. The Company's estimated fair value relating to the disposal group's impairment analysis was based on 10 -year discounted cash flow models, which included contractual inflows and outflows over a specific holding period. The cash flows consisted of observable inputs such as contractual revenues and unobservable inputs forecasted revenues and expenses. These unobservable inputs were based on market conditions and the Company's expected growth rates. As of the spin-off date, capitalization rates ranging from 6.75% to 10.00% and discount rates ranging from 7.75% to 15.25% were utilized in the model and were based upon observable rates that the Company believed to be within a reasonable range of current market rates. As a result of this analysis, the Company recorded a provision for asset impairment related to Highlands of $76,583 in discontinued operations on the consolidated statement of operations and comprehensive income for the year ended December 31, 2016 as the net book value of the disposal group exceeded its estimated fair value. During the year ended December 31 , 2016, the Company identified one non-core office property with a reduced expected holding period based on a review of the probability of the property's disposition. The Company's estimated fair value relating to this property's impairment analysis was based on a ten-year undiscounted cash flow model. Capitalization rates ranging from 6.75% to 7.00% and discount rates ranging from 7.00% to 8.00% were utilized in the model and were based upon observable market rates that the Company believed to be within a reasonable range. As a result of this analysis, the Company recorded a provision for asset impairment on this non-core office property of $29,931 in discontinued operations on the consolidated statement of operations and comprehensive income for the year ended December 31, 2016, resulting in a total provision for asset impairment of $106,514 in discontinued operations on the consolidated statement of operations and comprehensive income for the year ended December 31 , 2016. Investment in unconsolidated entities During the year ended December 31, 2018, the Company evaluated its investment in DRV for potential other-than-temporary impairment due to a reduction in expected holding period. The Company obtained a third-party independent appraisal to assist in establishing a range of estimated fair values of the underlying assets as of December 31, 2018. The Company's estimated fair value relating to its investment in DRV reflects the expected future cash distributions stemming from the value of the underlying assets at a point within that established range that management believes is most probable of realization, which, if liquidated, would result in an amount due to the Company based on the joint venture partners' respective waterfall distributions, pursuant to the terms of the Second Amended and Restated Limited Liability Company Agreement of DRV, dated as of September 30, 2015. The appraisal utilized a discounted cash flow model, which included inflows and outflows over a specific holding period. The cash flows consist of unobservable inputs such as forecasted revenues and expenses. These unobservable inputs are based on market conditions and expected growth rates. Capitalization rates ranging from 5.00% to 8.00% and discount rates ranging from 10.00% to 35.00% were utilized in the model and are based upon observable rates that the Company believes to be within a reasonable range of current market rates based on the nature of the underlying investment and associated risks. The Company selected the point within the range of estimated fair values established by the third-party independent appraisal that most appropriately reflects the underlying facts and circumstances of the investment, and as a result the Company recorded an other-than-temporary impairment of $29,933 related to DRV on the consolidated statement of operations and comprehensive income for the year ended December 31, 2018. The following table summarizes activity for the Company’s assets measured at fair value on a non-recurring basis and the related impairment losses for the years ended December 31, 2018, 2017, and 2016: As of December 31, 2018 As of December 31, 2017 As of December 31, 2016 Level 3 Impairment Loss Level 3 Impairment Loss Level 3 Impairment Loss Investment properties, continuing operations $ 64,075 $ 3,510 $ 105,900 $ 27,754 $ 66,323 $ 11,208 Investment properties, discontinued operations — — — — 584,358 106,514 Investment in unconsolidated entities 30,049 29,933 — — — — Total $ 33,443 $ 27,754 $ 117,722 Financial Instruments Not Measured at Fair Value The following table represents the estimated fair value of financial instruments presented at carrying values in the consolidated financial statements as of December 31, 2018 and 2017 : December 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Mortgages payable $ 213,925 $ 212,572 $ 370,804 $ 372,962 Term loans $ 352,000 $ 352,006 n/a n/a Line of credit and term loans n/a n/a $ 300,000 $ 299,770 The Company estimated the fair value of its mortgages payable using a weighted average effective market interest rate of 4.38% as of December 31, 2018 compared to 4.20% as of December 31, 2017 . The fair value estimate of the line of credit and term loans approximates the carrying value due to limited market volatility in pricing. The assumptions reflect the terms currently available on similar borrowing terms to borrowers with credit profiles similar to the Company's. As a result, the Company used a weighted average interest rate of 3.63% as of December 31, 2018 to estimate the fair value of its term loans, and 3.48% as of December 31, 2017 to estimate the fair value of its line of credit and term loans. The Company has determined that its debt instrument valuations are classified in Level 2 of the fair value hierarchy.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company has elected and has operated so as to qualify to be taxed as a REIT under the Code commencing with the tax year ended December 31, 2005. So long as it qualifies as a REIT, the Company generally will not be subject to federal income tax on taxable income that is distributed currently to stockholders. A REIT is subject to a number of organizational and operational requirements including a requirement that it currently distribute at least 90% of its REIT taxable income (subject to certain adjustments) to its stockholders each year. If the Company fails to qualify as a REIT in any taxable year, without the benefit of certain relief provisions, the Company will be subject to federal and state income tax on its taxable income at regular corporate tax rates and would not be able to re-elect REIT during the four years following the year of the failure. Even if the Company qualifies for taxation as a REIT, the Company may be subject to certain state and local taxes on its income, property or net worth and federal income and excise taxes on its undistributed income. The Company has elected to treat certain of its consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as TRSs pursuant to the Code. Among other activities, TRSs may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to federal and state income tax at regular corporate tax rates. The components of income tax expense for the years ended December 31, 2018, 2017, and 2016 are as follows: 2018 2017 2016 Federal State Total Federal State Total Federal State Total Current $ (169 ) $ 199 $ 30 $ 781 $ 543 $ 1,324 $ 130 $ 71 $ 201 Deferred — — — — — — — — — Income tax provision from continuing operations $ (169 ) $ 199 $ 30 $ 781 $ 543 $ 1,324 $ 130 $ 71 $ 201 Income tax (benefit) provision from discontinued operations $ — $ — $ — $ (3 ) $ (5 ) $ (8 ) $ (1 ) $ 268 $ 267 Deferred tax assets and liabilities are included within deferred costs and other assets and other liabilities in the consolidated balance sheets, respectively. The components of the deferred tax assets and liabilities at December 31, 2018 and 2017 were as follows: 2018 2017 Basis difference on investment in unconsolidated entities (a) (b) $ 27,351 $ 27,916 Total deferred tax assets 27,351 27,916 Less: Valuation allowance (27,351 ) (27,916 ) Net deferred tax assets — — Deferred tax liabilities $ — $ — (a) Primarily relates to the basis difference in land of a non-core land development held by DRV. (b) As a result of recent U.S. federal income tax reform, the Company has applied a federal corporate tax rate of 21% and a California state rate of 8.84% to determine deferred tax assets and liabilities at December 31, 2018. Deferred tax assets are recognized only to the extent that it is more likely than not that they will be realized based on consideration of available evidence, including future reversal of existing taxable temporary differences, future projected taxable income, and tax-planning strategies. Management believes it is more likely than not that the Company will not realize the benefits of these deductible differences, accordingly, a valuation allowance of $27,351 has been recognized to reduce the deferred tax asset to zero at December 31, 2018 . Uncertain Tax Positions The Company had no unrecognized tax benefits as of or during the three year period ended December 31, 2018 . The Company expects no significant changes in unrecognized tax benefits due to changes in tax positions within one year of December 31, 2018 . The Company has accrued no material interest or penalties relating to income taxes recognized in the consolidated statements of operations and comprehensive income for the years ended December 31, 2018, 2017 and 2016 or in the consolidated balance sheets as of December 31, 2018 and 2017 . As of December 31, 2018 , the Company’s 2016, 2015, and 2014 tax years remain subject to examination by U.S. and various state tax jurisdictions. Distributions For federal income tax purposes, distributions may consist of ordinary income, qualifying dividends, return of capital, capital gains or a combination thereof. Distributions to the extent of the Company’s current and accumulated earnings and profits for federal income tax purposes are taxable to the recipient as ordinary dividends, qualified dividends or capital gain distributions. Distributions in excess of these earnings and profits will constitute a non-taxable return of capital and will reduce the recipient’s basis in the shares. Distributions in excess of the Company’s current and accumulated earnings and profits and in excess of the recipient’s basis in the shares will be taxable as capital gain. A summary of the taxable nature of the Company’s common distributions paid for each of the years in the three year period ended December 31, 2018 is as follows: For the year ended December 31, 2018 2017 2016 Ordinary income $ 0.028 $ — $ 0.080 Capital gain — — 0.240 Return of capital 0.043 0.069 0.150 Total distributions per share $ 0.071 $ 0.069 $ 0.470

Earnings Per Share and Equity T

Earnings Per Share and Equity Transactions	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share and Equity Transactions	Earnings Per Share and Equity Transactions Basic earnings per share ("EPS") are computed using the two-class method by dividing net income by the weighted average number of common shares outstanding for the period (the "common shares"). The restricted share awards issued pursuant to the Incentive Award Plan are deemed to be participating securities. Diluted EPS is computed using the treasury method if more dilutive, by dividing net income by the common shares plus potential common shares issuable upon exercising options or other contracts. The following table reconciles the amounts used in calculating basic and diluted income per share: Year ended December 31, 2018 2017 2016 Numerator: Net income from continuing operations $ 83,849 $ 57,954 $ 119,199 Earnings allocated to unvested restricted shares (95 ) (15 ) (10 ) Net income from continuing operations attributable to common shareholders $ 83,754 $ 57,939 $ 119,189 Net income from discontinued operations attributable to common shareholders $ — $ 3,839 $ 133,523 Denominator: Weighted average number of common shares outstanding - basic 761,139,011 773,445,341 854,638,497 Effect of unvested restricted shares 926,463 1,155,138 62,258 Weighted average number of common shares outstanding - diluted 762,065,474 774,600,479 854,700,755 Basic and diluted income per common share: Net income from continuing operations per share $ 0.11 $ 0.07 $ 0.14 Net income from discontinued operations per share — — 0.15 Net income per share $ 0.11 $ 0.07 $ 0.29 On August 15, 2018, the Company announced and commenced a modified "Dutch Auction" tender offer (the "2018 Offer") to purchase for cash up to $75,000 in value of shares of the Company's common stock, par value $0.001 per share (the "Shares"), subject to its ability to increase the number of Shares accepted for payment by up to 2% of the Company's outstanding Shares. The Company exercised that option and increased the 2018 Offer by 10,706,774 shares, or $22,500 , to avoid any proration for the stockholders tendering shares. The 2018 Offer expired on September 13, 2018. As a result of the 2018 Offer, the Company accepted for purchase 46,559,289 shares of its common stock (which represented approximately 6.0% of the shares of common stock outstanding at the time) at a purchase price of $2.10 per share, for a cost of approximately $97,775 , excluding fees and expenses. Aggregate costs of $98,491 were recorded as reductions to common stock and additional paid-in capital on the consolidated statements of equity for the year ended December 31, 2018. On October 27, 2016, the Company announced and commenced a modified "Dutch Auction" tender offer (the "2016 Offer") to purchase for cash up to $200,000 in value of shares of the Company's common stock, par value $0.001 per share (the "2016 Shares"), subject to the Company's ability to increase the number of 2016 Shares accepted for payment in the 2016 Offer by up to 2% of the Company's outstanding 2016 Shares, without amending or extending the 2016 Offer in accordance with the rules promulgated by the SEC. The Company exercised that option and increased the 2016 Offer by 14,186,716 shares, or $37,700 , to avoid any proration for the stockholders tendering shares. The 2016 Offer expired on December 1, 2016. As a result of the 2016 Offer, the Company accepted for purchase 89,502,449 shares of its common stock (which represented approximately 10.4% of the shares of common stock outstanding at the time) at a purchase price of $2.66 per share, for a cost of approximately $238,077 , excluding fees and expenses. Aggregate costs of $241,016 were recorded as reductions to common stock and additional paid-in capital on the consolidated statements of equity for the year ending December 31, 2016. On April 17, 2017, the Company received $1,929 of excess funds related to the 2016 Offer.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Share Unit Plans During 2014, the Company adopted the Inland American Real Estate Trust, Inc. 2014 Share Unit Plan (the "Retail Plan"), with respect to the Company's retail business and the Inland American Communities Group, Inc. 2014 Share Unit Plan (the "Student Housing Plan"), with respect to the Company's student housing business (collectively, the "Share Unit Plans"). Each Share Unit Plan provided for the grant of "share unit" awards to eligible participants. The value of a "share unit" was estimated based on a phantom capitalization of the Company's retail/non-core business and student housing business, and does not necessarily correspond to the value of a share of common stock of the Company or Inland American Communities Group, Inc. (University House Communities Group, Inc.), as applicable. Vesting of the share units is conditioned upon the occurrence of a triggering event, such as a listing or a change in control of the applicable business, and if no triggering event occurs within five years following the applicable grant date, then the share units are forfeited. The Company does not recognize share-based compensation expense with respect to the Share Unit Plans until the occurrence of a triggering event. The closing of the student housing platform sale on June 21, 2016 was a triggering event under the Student Housing Plan. As of June 20, 2016, share unit awards granted in 2016, 2015 and 2014 with an aggregate vested value of $2,246 , $1,796 , and $833 , respectively, were outstanding under the Student Housing Plan, and were paid as part of the closing of the student housing platform sale and recorded as an offset of the gain on the student housing platform sale, which was included in discontinued operations on the consolidated statements of operations and comprehensive income for year ended December 31, 2016. Certain share unit awards vested under the Student Housing Plan during the year ended December 31, 2016, with an aggregate value of $313 , were included in continuing operations on the consolidated statements of operations and comprehensive income. As of June 19, 2015, in connection with the adoption of the Incentive Award Plan (as defined below), the Company terminated the Retail Plan. Awards outstanding as of June 19, 2015 under the Retail Plan will remain outstanding and subject to the terms of the Retail Plan and the applicable award agreement. The Company does not anticipate the Retail Plan Awards will experience a triggering event prior to its expiration on March 12, 2019. As a triggering event has not occurred with respect to the Company's retail business, the Company did not recognize stock-based compensation expense related to the Retail Plan for the years ended December 31, 2018, 2017, or 2016. Incentive Award Plan Effective as of June 19, 2015, the Company's Board adopted and approved the InvenTrust Properties Corp. 2015 Incentive Award Plan (as amended, the "Incentive Award Plan"), under which the Company may grant cash and equity incentive awards to eligible employees, directors, and consultants. The restricted share units granted under the Incentive Award Plan to employees vest equally on each of three anniversaries subsequent to the grant date, and annually for those shares granted to directors, subject to the recipients' continued service to the Company. Under the Incentive Award Plan, the Company is authorized to grant up to 30,000,000 shares of the Company's common stock pursuant to awards under the plan. As of December 31, 2018 , 23,626,050 shares were available for future issuance under the Incentive Award Plan. A summary of the Company's restricted stock unit activity during the years ended December 31, 2018 , 2017 and 2016 is as follows: Unvested Restricted Stock Units Weighted Average Grant Date Price Per Share (a) Outstanding as of January 1, 2016 951,555 $4.00 Shares granted 2,410,341 $3.14 Shares vested (1,096,480) $3.48 Shares forfeited (618,893) $3.47 Outstanding as of December 31, 2016 1,646,523 $3.29 Shares granted 2,019,078 $3.29 Shares vested (1,750,773) $3.38 Shares forfeited (379,323) $3.25 Outstanding as of December 31, 2017 1,535,505 $3.19 Shares granted 1,950,307 $3.14 Shares vested (1,349,852) $3.20 Shares forfeited (587,810) $3.19 Outstanding as of December 31, 2018 1,548,150 $3.18 (a) On an annual basis, the Company engages an independent third-party valuation advisory consulting firm to estimate the per share value of the Company's common stock. As of December 31, 2018 , there was $4,503 of total unrecognized compensation expense related to unvested stock-based compensation arrangements granted under the Incentive Award Plan related to 1,062,563 and 485,587 unvested shares vesting in 2019 and 2020, respectively. The restricted stock units outstanding as of December 31, 2018 have vesting schedules through December 2019 or 2020, as applicable. Stock-based compensation expense will be amortized on a straight-line basis over the vesting period. The Company recognized stock-based compensation expense of $4,330 , $5,782 and $3,737 related to the Incentive Award Plan for the years ended December 31, 2018 , 2017 and 2016, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Matters The Company is subject, from time to time, to various types of third-party legal claims or litigation that arise in the ordinary course of business, including, but not limited to, employee matters, property loss claims, personal injury or other damages resulting from contact with the Company’s properties. These claims and lawsuits and any resulting damages are generally covered by the Company's insurance policies. The Company accrues for legal costs associated with loss contingencies when these costs are probable and reasonably estimable. While the resolution of these matters cannot be predicted with certainty, management does not expect, based on currently available information, that the final outcome of any pending claims or legal proceedings will have a material adverse effect on the financial condition, results of operations or cash flows of the Company. Legacy Corner Apartments As previously disclosed in our Annual Report for the year ended December 31, 2017, on September 6, 2013, a former tenant at the Legacy Corner Apartments property in Midwest City, Oklahoma filed a complaint in the District Court of Oklahoma County against the Company and other named defendants alleging premises liability and negligent maintenance. In April 2017, a jury trial commenced and ultimately resulted in a verdict against the Company’s subsidiary and the other named defendants in favor of the plaintiff. In July 2017, the plaintiff asserted a demand against the Company’s subsidiary and the other named defendants to settle the lawsuit through arbitration in exchange for an amount less than the total damages awarded. Subsequent to negotiations with the Company's insurance carrier, the Company recorded a $553 legal expense to other expenses on the consolidated statements of operations and comprehensive income related to its portion of the final settlement paid by the Company during the year ended December 31, 2017. University House Communities Group, Inc., Indemnity Claims The Company received an indemnity notice from UHC Acquisition Sub LLC ("UHC") regarding certain matters under the Stock Purchase Agreement, dated January 3, 2016, for University House Communities Group, Inc., which was sold in June 2016. The notice sets forth various items for which UHC believes they are entitled to indemnification from the Company. In the normal course of property dispositions, pursuant to the purchase and sale agreements, certain indemnification claims can be made against the Company by the purchaser, in which the Company will continue to adjust the financial statements, as necessary, based on those claims. Based on the facts and circumstances of the indemnification claims made, guidance provided by third-party specialists and counsel, and management’s ongoing assessment of the UHC claims, in 2017 the Company accrued a potential loss contingency representing their best estimate of the potential loss related to these claims. However, due to the uncertain nature of this matter, the ultimate resolution could result in a loss of up to $5,000 in excess of the amount accrued. As of December 31, 2018, no material additional information has come to the attention of management that would change their best estimate of the potential loss related to these claims. These claims and any resulting damages are not expected to be covered by the Company's insurance policies. Operating and Capital Lease Commitments The Company has non-cancelable operating leases for office space used in its business. During the years ended December 31, 2018, 2017 and 2016, the Company recognized rent expense associated with these leases of $1,114 , $1,411 , and $1,415 , respectively, as a part of general and administrative expenses on the consolidated statements of operations and comprehensive income. The Company has non-cancelable contracts for property improvements which have been deemed to contain capital leases. At December 31, 2018, the Company has recognized total capital lease assets of $2,097 and accumulated amortization of $104 as a part of building and other improvements and accumulated depreciation, respectively, on the consolidated balance sheet. During the year ended December 31, 2018, the Company recognized interest expense associated with these leases of $104 as a part of interest expense, net on the consolidated statement of operations and comprehensive income. Future minimum lease obligations under these leases as of December 31, 2018, were as follows: Future Minimum Base Rent Payments Operating Leases Capital Leases 2019 $ 717 $ 532 2020 611 532 2021 494 519 2022 466 317 2023 479 40 Thereafter 1,041 — Total expected minimum lease obligations $ 3,808 1,940 Less: Amount representing interest (a) (151 ) Present value of net minimum lease payments (b) $ 1,789 (a) Interest includes the amount necessary to reduce the total expected minimum lease obligations to present value calculated at the Company's incremental borrowing rate. (b) The present value of net minimum lease payments are presented in other liabilities in the accompanying consolidated balance sheets.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In preparing its consolidated financial statements, the Company evaluated events and transactions occurring after December 31, 2018 through the date the financial statements were issued for recognition and disclosure purposes. On January 31, 2019, the Company acquired Commons at University Place, a 92,100 square foot neighborhood center located in the Raleigh-Cary, NC MSA, for a gross acquisition price of $23,300 .

Quarterly Supplemental Financia

Quarterly Supplemental Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Supplemental Financial Information [Abstract]
Quarterly Supplemental Financial Information (unaudited)	Quarterly Supplemental Financial Information (unaudited) The following table represents the results of operations, for each quarterly period, during 2018 and 2017: For the quarter ended December 31, 2018 September 30, 2018 June 30, 2018 March 31, 2018 Total income $ 56,491 $ 60,493 $ 61,774 $ 63,916 Net income 17,507 8,947 23,163 34,232 Net income per common share, basic and diluted (a) $0.03 $0.01 $0.03 $0.04 Weighted average number of common shares outstanding, basic and diluted (a) 727,904,818 768,385,770 774,391,881 774,311,254 For the quarter ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total income $ 64,521 $ 62,849 $ 62,152 $ 62,287 Net income from continuing operations 8,285 12,243 34,753 2,673 Net income from discontinued operations (4,474 ) 9,722 (833 ) (576 ) Net income 3,811 21,965 33,920 2,097 Net income per common share, basic and diluted (a) $— $0.03 $0.04 $— Weighted average number of common shares outstanding, basic and diluted (a) 773,562,942 773,517,492 773,381,165 773,316,262 (a) Quarterly net income per common share amounts may not total to the annual amounts due to rounding and the changes in the number of weighted average common shares outstanding.

Schedule III - Real Estate And

Schedule III - Real Estate And Accumulated Depreciation	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate and Accumulated Depreciation	Initial Cost (A) Gross amount at which carried at end of period PROPERTY NAME Encumbrance Land Buildings and Improvements Adjustments to Land Basis (B) Adjustments to Basis (B) Land and Improvements Buildings and Improvements Total (C) Accumulated Depreciation (D,E) Date of Completion of Construction or Date of Acquisition BEAR CREEK VILLAGE CENTER $ 13,020 $ 3,523 $ 12,384 $ — $ 245 $ 3,523 $ 12,629 $ 16,152 $ 4,580 2009 BENT TREE PLAZA — 1,983 7,093 — 1,646 1,983 8,739 10,722 2,809 2009 BOYNTON COMMONS — 11,400 17,315 — 2,213 11,400 19,528 30,928 5,827 2010 BROOKS CORNER 12,557 10,600 13,648 — 3,469 10,600 17,117 27,717 7,751 2006 BUCKHEAD CROSSING — 7,565 27,104 — 1,013 7,565 28,117 35,682 9,933 2009 CAMPUS MARKETPLACE 41,000 26,928 43,445 55 (90 ) 26,983 43,355 70,338 3,109 2017 CARY PARK TOWN CENTER — 5,555 17,280 — — 5,555 17,280 22,835 899 2017 CENTERPLACE OF GREELEY 14,087 3,904 14,715 — 655 3,904 15,370 19,274 5,717 2009 CHESAPEAKE COMMONS — 2,669 10,839 — 62 2,669 10,901 13,570 4,705 2007 CHEYENNE MEADOWS — 2,023 6,991 — 399 2,023 7,390 9,413 2,776 2009 COWETA CROSSING — 1,143 4,590 — 16 1,143 4,606 5,749 1,713 2009 CROSSROADS AT CHESAPEAKE SQUARE — 3,970 13,732 (296 ) 2,033 3,674 15,765 19,439 7,017 2007 Initial Cost (A) Gross amount at which carried at end of period PROPERTY NAME Encumbrance Land Buildings and Improvements Adjustments to Land Basis (B) Adjustments to Basis (B) Land and Improvements Buildings and Improvements Total (C) Accumulated Depreciation (D,E) Date of Completion of Construction or Date of Acquisition CUSTER CREEK VILLAGE — 4,750 12,245 — 355 4,750 12,600 17,350 5,187 2007 ELDRIDGE TOWN CENTER — 3,200 16,663 — 771 3,200 17,434 20,634 8,362 2005 GARDEN VILLAGE — 3,188 16,522 — 173 3,188 16,695 19,883 5,794 2009 GATEWAY MARKET CENTER — 13,600 4,992 — 1,082 13,600 6,074 19,674 2,257 2010 KENNESAW MARKETPLACE — 12,587 51,860 — — 12,587 51,860 64,447 1,009 2018 KYLE MARKETPLACE — 6,076 48,220 — 308 6,076 48,528 54,604 2,156 2017 MARKET AT WESTLAKE — 1,200 6,274 (64 ) 80 1,136 6,354 7,490 2,660 2007 NORTHCROSS COMMONS — 7,591 21,303 — 341 7,591 21,644 29,235 1,705 2016 NORTHWEST MARKETPLACE — 3,870 30,340 (31 ) 1,119 3,839 31,459 35,298 12,742 2007 OLD GROVE MARKETPLACE — 12,545 8,902 — 46 12,545 8,948 21,493 807 2016 PARAISO PARC AND WESTFORK PLAZA — 28,267 124,019 — 4,862 28,267 128,881 157,148 8,120 2017 PAVILION AT LAQUINTA 23,641 15,200 20,947 — 941 15,200 21,888 37,088 7,637 2009 Initial Cost (A) Gross amount at which carried at end of period PROPERTY NAME Encumbrance Land Buildings and Improvements Adjustments to Land Basis (B) Adjustments to Basis (B) Land and Improvements Buildings and Improvements Total (C) Accumulated Depreciation (D,E) Date of Completion of Construction or Date of Acquisition PEACHLAND PROMENADE — 1,742 6,502 4,158 7,754 5,900 14,256 20,156 360 2009 PGA PLAZA — 10,414 75,730 — — 10,414 75,730 86,144 1,499 2018 PLANTATION GROVE 7,300 3,705 6,300 — 568 3,705 6,868 10,573 1,217 2014 PLAZA MIDTOWN — 5,295 23,946 — 24 5,295 23,970 29,265 1,067 2017 PROMENADE FULTONDALE — 5,540 22,414 (1,022 ) 1,783 4,518 24,197 28,715 7,939 2009 QUEBEC SQUARE 23,550 9,579 40,086 — 2,432 9,579 42,518 52,097 5,898 2014 RENAISSANCE CENTER 15,155 26,713 96,141 — 3,722 26,713 99,863 126,576 10,115 2016 RIO PINOR PLAZA — 5,171 26,903 — 133 5,171 27,036 32,207 3,077 2015 RIVER OAKS SHOPPING CENTER — 24,598 88,418 — (112 ) 24,598 88,306 112,904 4,037 2017 RIVERVIEW VILLAGE — 6,000 9,649 — 777 6,000 10,426 16,426 4,343 2007 RIVERWALK MARKET — 5,931 23,922 — 1 5,931 23,923 29,854 1,897 2016 ROSE CREEK — 1,443 5,630 — 509 1,443 6,139 7,582 2,118 2009 SANDY PLAINS CENTRE — 12,366 27,270 — — 12,366 27,270 39,636 — 2018 Initial Cost (A) Gross amount at which carried at end of period PROPERTY NAME Encumbrance Land Buildings and Improvements Adjustments to Land Basis (B) Adjustments to Basis (B) Land and Improvements Buildings and Improvements Total (C) Accumulated Depreciation (D,E) Date of Completion of Construction or Date of Acquisition SARASOTA PAVILION — 12,000 25,823 — 4,221 12,000 30,044 42,044 8,711 2010 SCOFIELD CROSSING — 8,100 4,992 (576 ) 317 7,524 5,309 12,833 2,200 2007 SHOPS AT THE GALLERIA — 52,104 75,651 — 577 52,104 76,228 128,332 7,659 2016 SILVERLAKE — 2,031 6,975 — (10 ) 2,031 6,965 8,996 2,704 2009 SONTERRA VILLAGE — 5,150 15,095 — 325 5,150 15,420 20,570 1,634 2015 STEVENSON RANCH — 29,519 39,190 — 20 29,519 39,210 68,729 3,840 2016 SUNCREST VILLAGE 8,400 6,742 6,403 — 614 6,742 7,017 13,759 1,256 2014 SYCAMORE COMMONS — 12,500 31,265 — 1,782 12,500 33,047 45,547 11,717 2010 THE CENTER AT HUGH HOWELL — 2,250 11,091 — 806 2,250 11,897 14,147 5,223 2007 THE PARKE — 9,271 83,078 — 311 9,271 83,389 92,660 3,989 2017 THE POINTE AT CREEDMOOR — 7,507 5,454 — 6 7,507 5,460 12,967 551 2016 THE SHOPS AT TOWN CENTER — 19,996 29,776 — 114 19,996 29,890 49,886 1,916 2017 Initial Cost (A) Gross amount at which carried at end of period PROPERTY NAME Encumbrance Land Buildings and Improvements Adjustments to Land Basis (B) Adjustments to Basis (B) Land and Improvements Buildings and Improvements Total (C) Accumulated Depreciation (D,E) Date of Completion of Construction or Date of Acquisition THE SHOPS AT WALNUT CREEK 28,630 10,132 44,089 — 1,309 10,132 45,398 55,530 6,034 2015 THOMAS CROSSROADS — 1,622 8,322 — 1,246 1,622 9,568 11,190 3,224 2009 UNIVERSITY OAKS SHOPPING CENTER 26,585 7,250 25,326 — 8,098 7,250 33,424 40,674 10,204 2010 WEST CREEK SHOPPING CENTER — 5,151 8,659 — 37 5,151 8,696 13,847 1,700 2015 WESTPARK SHOPPING CENTER — 7,462 24,164 — (5,568 ) 7,462 18,596 26,058 2,428 2013 WHITE OAK CROSSING — 19,000 70,275 — 2,123 19,000 72,398 91,398 18,746 2011 WINDERMERE VILLAGE — 1,220 6,331 — 1,267 1,220 7,598 8,818 3,548 2005 WINDWARD COMMONS — 12,823 13,779 — 299 12,823 14,078 26,901 1,192 2016 WOODBRIDGE — — — 9,509 41,617 9,509 41,617 51,126 12,932 2013 WOODLAKE CROSSING — 3,420 14,153 — 3,508 3,420 17,661 21,081 5,858 2009 Total Corporate Assets — — — — 14,104 — 14,104 14,104 10,225 - Total $ 213,925 $ 547,084 $ 1,554,225 $ 11,733 $ 116,453 $ 558,817 $ 1,670,678 $ 2,229,495 $ 286,330 Notes: The Company had $12,788 of assets included in construction in progress at December 31, 2018, which have been omitted from the prior table. The aggregate cost of real estate owned at December 31, 2018 for federal income tax purposes was approximately $2,449,497 (unaudited). (A) The initial cost to the Company represents the original purchase price of the asset, including amounts incurred subsequent to acquisition which were contemplated at the time the property was acquired. (B) Cost capitalized subsequent to acquisition includes additional tangible costs associated with investment properties, including any earnout of tenant space. Amount also includes impairment charges recorded subsequent to acquisition to reduce basis. (C) Reconciliation of real estate owned: 2018 2017 2016 Balance at January 1, $ 2,516,085 $ 2,180,252 $ 2,259,631 Acquisitions and capital improvements 237,439 598,843 497,646 Disposals and write-offs (524,029 ) (263,010 ) (534,458 ) Properties classified as discontinued operations — — (42,567 ) Balance at December 31, $ 2,229,495 $ 2,516,085 $ 2,180,252 (D) Reconciliation of accumulated depreciation: 2018 2017 2016 Balance at January 1, $ 348,337 $ 351,389 $ 394,904 Depreciation expense, continuing operations 73,021 70,959 63,684 Depreciation expense, properties classified as discontinued operations — 974 27,397 Accumulated depreciation expense, properties classified as discontinued operations — — (2,601 ) Disposal and write-offs (135,028 ) (74,985 ) (131,995 ) Balance at December 31, $ 286,330 $ 348,337 $ 351,389 (E) Depreciation is computed based upon the following estimated lives: Buildings and improvements 30 years Tenant improvements Life of the lease Furniture, fixtures and equipment 5 - 15 years

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Reclassifications	Reclassifications The Company has made certain reclassifications to the consolidated statements of operations and comprehensive income for the years ended December 31, 2017 and 2016 to conform to the 2018 presentation, including a $3,706 and $4,877 reclassification, respectively, of certain payroll costs from general and administrative expenses to property operating expenses based on the determination by the Company that certain functions' activities were more directly associated with the operations of the retail properties than corporate-level activities.
Consolidation	Consolidation The Company evaluates its investments in LLCs and LPs to determine whether each such entity may be a VIE. If the entity is a VIE, the determination of whether the Company is the primary beneficiary must be made. The primary beneficiary determination is based on a qualitative assessment as to whether the Company has (i) power to direct significant activities of the VIE and (ii) an obligation to absorb losses or the right to receive benefits that could be potentially significant to the VIE. The Company will consolidate a VIE if it is deemed to be the primary beneficiary, as defined in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 810, Consolidation . The equity method of accounting is applied to entities in which the Company is not the primary beneficiary as defined in ASC 810, or the entity is not a VIE and the Company does not have control, but can exercise influence over the entity with respect to its operations and major decisions. Investments in entities that the Company does not control and over which it does not exercise significant influence are carried at the lower of cost or estimated fair value, as appropriate. The Company’s ability to correctly assess control over an entity affects the presentation of these investments in the Company’s consolidated financial statements. From time to time, the Company may enter into purchase agreements structured as a reverse like-kind exchange under Section 1031 of the Internal Revenue Code of 1986, as amended (the "Code") ("Reverse 1031 Exchange") in order to acquire retail properties. For a Reverse 1031 Exchange in which the Company purchases a new asset that is similar in nature, character, or class prior to selling the asset to be matched in the like-kind exchange (the Company refers to a new asset being acquired in the Reverse 1031 Exchange prior to the sale of the related asset as a "Parked Asset"), legal title to the Parked Asset is held by a wholly owned subsidiary (the "EAT Subsidiary") of an Exchange Accommodation Titleholder ("EAT") engaged to execute the Reverse 1031 Exchange until the sale transaction and the Reverse 1031 Exchange is completed. The Company, through a subsidiary, enters into a master lease agreement with the EAT Subsidiary whereby the EAT Subsidiary leases the Parked Asset and all other rights in connection with the acquisition to the Company. The master lease terminates on the earlier of (i) the date that the Parked Asset is transferred to the Company, or an affiliate, (ii) the date that the EAT transfers to the Company, or an affiliate of the Company, its ownership in the EAT Subsidiary, or (iii) 180 days from the date that legal title to the Parked Asset was transferred to the EAT Subsidiary. The EAT is classified as a VIE, as it does not have sufficient equity investment at risk to finance its activities without additional subordinated financial support. The Company generally structures the purchase agreements in a manner which results in the Company being deemed the primary beneficiary as it has the ability to direct the activities of the entities that most significantly impact economic performance and has all of the risks and rewards of ownership. Accordingly, the Company consolidates properties acquired through active Reverse 1031 Exchanges. The Company may hold investment properties which consist of wholly owned multi-tenant retail space and an undivided interest in certain common elements as tenants-in-common. An undivided interest is an ownership arrangement in which two or more parties jointly own property, and title is held individually to the extent of each party’s interest. The ownership of the common elements are reviewed for control and, based upon ability to effectively participate in the decisions that most significantly impact economic performance, the Company may apply proportionate consolidation of the common elements.
Real Estate	Real Estate The Company evaluates the inputs, processes and outputs of each asset acquired to determine if the transaction is a business combination or asset acquisition. If an acquisition qualifies as a business combination, the related transaction costs are recorded as an expense in the consolidated statements of operations and comprehensive income. If an acquisition qualifies as an asset acquisition, the related transaction costs are generally capitalized and amortized over the useful life of the acquired assets. The Company allocates the purchase price of real estate to land, building, other building improvements, tenant improvements, and intangible assets and liabilities (such as the value of above- and below-market leases, in-place leases and origination costs associated with in-place leases). The values of above- and below-market leases are recorded as intangible assets, net, and intangible liabilities, net, respectively, on the consolidated balance sheets, and are amortized as either a decrease (in the case of above-market leases) or an increase (in the case of below-market leases) to rental income over the remaining term of the associated tenant lease. The values, if any, associated with in-place leases are recorded in intangible assets, net on the consolidated balance sheets and are amortized to depreciation and amortization expense on the consolidated statements of operations and comprehensive income over the remaining lease term. The difference between the contractual rental rates and the Company’s estimate of market rental rates is measured over a period equal to the remaining non-cancelable term of the leases, including below-market renewal options, if reasonably assured. For the amortization period, the remaining term of leases with renewal options at terms below market reflect the assumed exercise of such below-market renewal options, if reasonably assured. If a tenant vacates its space prior to the contractual expiration of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible asset or liability is written off. Tenant improvements are depreciated and origination costs are amortized over the remaining term of the lease or charged against earnings if the lease is terminated prior to its contractual expiration date. The Company performs, with the assistance of a third-party valuation specialist, the following procedures for assets the Company acquires: • Estimate the value of the property "as if vacant" as of the acquisition date; • Allocate the value of the property among land, building, and other building improvements and determine the associated useful life for each; • Calculate the value and associated life of above- and below-market leases on a tenant-by-tenant basis. The difference between the contractual rental rates and the Company’s estimate of market rental rates is measured over a period equal to the remaining term of the leases (using a discount rate which reflects the risks associated with the leases acquired, including geographical location, size of leased area, tenant profile and credit risk); • Estimate the fair value of the tenant improvements, legal costs and leasing commissions incurred to obtain the leases and calculate the associated useful life for each; • Estimate the fair value of assumed debt, if any; and • Estimate the intangible value of the in-place leases based on lease execution costs of similar leases as well as lost rent payments during an assumed lease-up period and their associated useful lives on a tenant-by-tenant basis. As of January 1, 2018, the Company's derecognition of real estate and the related gains or losses on sale of investment properties are recognized when (i) the parties to the sale contract have approved the contract and are committed to perform their respective obligations; (ii) the Company can identify each party’s rights regarding the property transferred; (iii) the Company can identify the payment terms for the property transferred; (iv) the contract has commercial substance (that is, the risk, timing or amount of the entity’s future cash flows is expected to change as a result of the contract); and (v) the Company has satisfied its performance obligations by transferring control of the property. The timing of payment and satisfaction of performance obligations typically occur simultaneously on the disposition date upon transfer of the property’s ownership, at which point the Company recognizes a gain or loss equal to the difference between the amount of consideration transferred and the carrying amount of the investment property. Historically, the Company recognized gains and losses from sales of investment properties at the time of sale using the full accrual method based on the following criteria in ASC 360-20, Property, Plant and Equipment - Real Estate Sales : sales were consummated; usual risks and rewards of ownership were transferred to buyers; the Company had no substantial continuing involvement with the property; and any sales related receivables were not subject to future subordination. If these criteria were not all met, the Company deferred the gains and recognized them when the criteria were met. If the full accrual method was not followed, the Company used either the installment, deposit or cost recovery methods, as appropriate in the circumstances.
Investment Properties Held for Sale	Investment Properties Held for Sale In determining whether to classify an investment property as held for sale, the Company considers whether: (i) management has committed to a plan to sell the investment property; (ii) the investment property is available for immediate sale, in its present condition; (iii) the Company has initiated a program to locate a buyer; (iv) the Company believes that the sale of the investment property is probable; (v) the Company has received a significant non-refundable deposit for the purchase of the property; (vi) the Company is actively marketing the investment property for sale at a price that is reasonable in relation to its estimated fair value; and (vii) actions required for the Company to complete the plan indicate that it is unlikely that any significant changes will be made to the plan. If all of the above criteria are met, the Company classifies the investment property as held for sale. When these criteria are met, the Company suspends depreciation on the investment properties held for sale, including depreciation for tenant improvements and additions, as well as the amortization of acquired in-place and above/below-market lease intangibles. The properties held for sale and associated liabilities are classified separately on the consolidated balance sheets. Such properties are recorded at the lesser of the carrying value or estimated fair value less costs to sell. Additionally, if the sale represents a strategic shift that has (or will have) a major effect on the entity's results and operations, the operations are classified on the consolidated statements of operations and comprehensive income as discontinued operations for all periods presented.
Impairment of Long Lived Assets	Impairment of Long Lived Assets The Company assesses the carrying values of the respective long-lived assets, whenever events or changes in circumstances indicate that the carrying amounts of these assets may not be fully recoverable, such as a reduction in the expected holding period of the asset. If it is determined that the carrying value is not recoverable because the expected undiscounted cash flows do not exceed carrying value, the Company records an impairment loss to the extent that the carrying value exceeds the estimated fair value. The valuation and possible subsequent impairment of investment properties is a significant estimate that can and does change based on the Company's continuous process of analyzing each property's economic condition at a point in time and reviewing assumptions about uncertain inherent factors, including observable inputs such as contractual revenues and unobservable inputs such as forecasted revenues and expenses, estimated net disposition proceeds, and discount rate. These unobservable inputs are based on market conditions and the Company's expected growth rates. However, assumptions and estimates about future cash flows and capitalization rates are complex and subjective. Changes in economic and operating conditions and the Company’s ultimate investment intent that occur subsequent to the impairment analyses could impact these assumptions and result in additional impairment of the investment properties. Periodically, management assesses whether there are any indicators that the carrying value of the Company’s investments in unconsolidated entities may be other than temporarily impaired. To the extent other-than-temporary impairment has occurred, the loss is measured as the excess of the carrying value of the investment over the estimated fair value of the investment. The estimated fair value of the investment is generally derived from the cash flows generated from the underlying real property investments of the investee.
Real Estate Capitalization and Depreciation	Real Estate Capitalization and Depreciation Real estate is reflected at cost less accumulated depreciation within investment properties on the consolidated balance sheets. Ordinary repairs and maintenance are expensed as incurred. Depreciation expense is computed using the straight-line method. Buildings within investment properties on the consolidated balance sheets are depreciated based upon an estimated useful life of 30 years and 5 - 15 years for furniture, fixtures and equipment and site improvements within building and other improvements on the consolidated balance sheets. Capital lease assets are amortized using the straight-line method over the shorter of the lease term or the useful life that would be assigned if the asset were owned. Capital lease amortization is included in depreciation and amortization on the consolidated statements of operations and comprehensive income. Tenant improvements are amortized on a straight-line basis over the lesser of the life of the tenant improvement or the lease term as a component of depreciation and amortization expense on the consolidated statements of operations and comprehensive income. Direct and indirect costs that are clearly related to the construction and improvements of investment properties are capitalized. Costs incurred for property taxes and insurance are capitalized during periods in which activities necessary to prepare the property for its intended use are in progress. Interest costs, if significant, are also capitalized during such periods. Additionally, the Company treats investments accounted for by the equity method as assets qualifying for interest capitalization, if significant, provided (i) the investee has activities in progress necessary to commence its planned principal operations and (ii) the investee’s activities include the use of such funds to acquire qualifying assets. The Company makes subjective assessments as to the useful lives of the Company’s assets. These assessments have a direct impact on the Company’s results of operations. Should the Company lengthen the expected useful life of an asset, it would be depreciated over a longer period, resulting in less annual depreciation expense and higher annual net income. Should the Company shorten the expected useful life of an asset, it would be depreciated over a shorter period resulting in more annual depreciation expense and lower annual net income.
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents The Company considers all demand deposits, money market accounts and investments in certificates of deposit and repurchase agreements with a maturity of three months or less, at the date of purchase, to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions generally exceed the Federal Deposit Insurance Corporation ("FDIC") insurance coverage. As a result, there is what we believe to be insignificant credit risk related to amounts on deposit in excess of FDIC insurance coverage. Restricted Cash Restricted cash consists of lenders’ escrows, operating real estate (escrows for taxes, insurance, capital expenditures and payments required under certain lease agreements), and funds restricted through lender or other agreements, including funds held in escrow for future acquisitions and potential like-kind exchanges under Section 1031 of the Code.
Derivative Instruments	Derivative Instruments In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company’s objective in using interest rate derivatives is to manage its exposure to interest rate movements and add stability to interest expense. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. 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 agreement without exchange of the underlying notional amount. The Company has a policy of only entering into contracts with established financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from those instruments nor does it anticipate any material adverse effect on its net income or financial position in the future from the use of derivatives. The Company recognizes all derivatives on the consolidated balance sheets at fair value. Additionally, the fair value adjustments will affect either equity or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the underlying transaction is terminated or completed all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the criteria for hedge accounting is marked-to-market each period on the consolidated statements of operations and comprehensive income. The Company does not use derivatives for trading or speculative purposes.
Fair Value Measurements	Fair Value Measurements The carrying amounts of cash and cash equivalents, restricted cash, accounts and rents receivables, other assets, accounts payable, accrued expenses and other liabilities reasonably approximate fair value, in management’s judgment, because of their short-term nature. Fair value information relating to marketable securities, derivative financial instruments, investment properties, investments in unconsolidated entities and debt is provided in "Note 10. Fair Value Measurements".
Revenue Recognition	Revenue Recognition The Company commences revenue recognition on its leases based on a number of factors. In most cases, revenue recognition under a lease begins when the lessee takes possession of, or controls the physical use of, the leased asset. Generally, this occurs on the lease commencement date. The determination of who is the owner, for accounting purposes, of the tenant improvements determines the nature of the leased asset and when revenue recognition under a lease begins. If the Company is the owner, for accounting purposes, of the tenant improvements, then the leased asset is the finished space and revenue recognition begins when the lessee takes possession of the finished space, typically when the improvements are substantially complete. If the Company concludes it is not the owner, for accounting purposes, of the tenant improvements (the lessee is the owner), then the leased asset is the unimproved space and any tenant improvement allowances funded under the lease are treated as lease incentives which reduce revenue recognized over the term of the lease. In these circumstances, the Company begins revenue recognition when the lessee takes possession of the unimproved space to construct their own improvements. The Company considers a number of different factors to evaluate whether it or the lessee is the owner of the tenant improvements for accounting purposes. These factors include: • whether the lease stipulates how and on what a tenant improvement allowance may be spent; • whether the tenant or landlord retains legal title to the improvements; • the uniqueness of the improvements; • the expected economic life of the tenant improvements relative to the length of the lease; and • who constructs or directs the construction of the improvements. The determination of who owns the tenant improvements, for accounting purposes, is subject to significant judgment. In making that determination, the Company considers all of the above factors. No one factor, however, is determinative. Rental income is recognized on a straight-line basis over the term of each lease. The cumulative difference between rental income earned and recognized on a straight-line basis on the consolidated statements of operations and comprehensive income and the cash rent due under the provisions of the lease agreements is recorded as deferred rent receivable and is included as a component of accounts and rents receivable in the accompanying consolidated balance sheets. Some leases provide for fixed base rent paid monthly in advance, and for the reimbursement by tenants to the Company for the tenant’s pro rata share of certain operating expenses including real estate taxes, special assessments, insurance, utilities, common area maintenance, management fees, and certain building repairs paid by the Company and recoverable under the terms of the lease. Under these leases, the Company pays all expenses and is reimbursed by the tenant for the tenant’s pro rata share of recoverable expenses paid. These expenses are included within property operating expenses and reimbursements are included in tenant recovery income on the consolidated statements of operations and comprehensive income. The Company records lease termination income when there is a signed termination agreement, all of the conditions of the termination agreement have been met, the tenant is no longer occupying the property and termination income amounts due are considered collectible. The Company defers recognition of contingent rental income (i.e. percentage/excess rent) until the specified target that triggers the contingent rental income is achieved. As a result of the adoption of ASC 606, Revenue from Contracts with Customers ("Topic 606"), the Company has changed its accounting policy from ASC 605, Revenue Recognition , ("Topic 605") for revenue recognized through other fee income on the consolidated statement of operations and comprehensive income. The Company adopted Topic 606 through the modified retrospective method on January 1, 2018. Therefore, the comparative prior period information has not been adjusted and continues to be reported under Topic 605. For the comparative prior period information reported under Topic 605, the Company recognized the fees as revenue when the related services were performed. The implementation of Topic 606 generally did not change the timing or pattern of revenue recognition for other fee income. As a result, there was no cumulative effect adjustment recognized in distributions in excess of accumulated net income on January 1, 2018 relating to other fee income. The Company has elected to apply Topic 606 to new and existing contracts that are not completed contracts as of January 1, 2018. Contract Balances The Company recognizes revenue when it satisfies a performance obligation. These rights to consideration most often result in receivables that are settled through recurring monthly customer payments for the services provided over the term of the contract. The Company generally does not receive prepayments for services or recognize revenue prior to being legally entitled to payment from the customer. As a result, the Company does not record material contract assets or contract liabilities. Property Management and Asset Management Fees The Company earns property management and asset management fees from services provided to our joint venture partnerships. Property management and asset management fees are recognized over time as services are rendered. The bundled services of the property management performance obligation and asset management performance obligation each qualify as a series of distinct services satisfied over time. The variable consideration related to each of the performance obligations is recognized in each of the periods that directly relate to the Company's efforts to provide those services. Accordingly, the Company has elected the optional exemption provided by Topic 606 and does not disclose information about remaining wholly unsatisfied performance obligations. The variability in timing of the property management and asset management fees, which generally relate to the fluctuation in cash receipts from tenants and potential changes in equity capitalization, are resolved on a monthly basis. For certain services, the Company acts as an agent on behalf of the customer to arrange for performance by a third party. Based on the Company's judgment, both the underlying asset management service activities and the underlying property management service activities are not distinct but are inputs (or fulfillment activities) to provide the combined output (either the overall asset management service or the overall property management service). Leasing Commissions and Other Fees The Company earns leasing commissions and other fees from services provided to our joint venture partnerships. Leasing commissions and other fees are recognized at a point in time consistent with the underlying service. The leasing performance obligation and other performance obligations are satisfied at the point in time which the customer is transferred control over and consumes the benefit of the service. The uncertainty of the leasing commissions and other fees are resolved upon delivery of the underlying service. Generally, the first and second installments of leasing commissions are paid upon lease executions and rent commencement, respectively.
Income Taxes	Income Taxes The Company is qualified and has elected to be taxed as a REIT under the Code for federal income tax purposes commencing with the tax year ended December 31, 2005. Since the Company qualifies for taxation as a REIT, the Company generally will not be subject to federal income tax on taxable income that is distributed to stockholders. In order to continue to qualify as a REIT, the Company is generally required to distribute at least 90% of its REIT taxable income (subject to certain adjustments) to its stockholders each year (the " 90% Distribution Requirement"). If the Company fails to qualify as a REIT in any taxable year, without the benefit of certain relief provisions, the Company will be subject to federal and state income tax on its taxable income at regular corporate tax rates. Even if the Company qualifies for taxation as a REIT, the Company may be subject to certain state and local taxes on its income, property or net worth and federal income and excise taxes on its undistributed income. The Company has elected to treat certain of its consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries ("TRSs") pursuant to the Code. Among other activities, TRSs may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to federal and state income tax at regular corporate tax rates. The Company accounts for income taxes using the asset and liability method under which deferred tax assets and liabilities are recognized for the estimated future tax consequences attributed to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. 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. Deferred tax assets are recognized only to the extent that it is more likely than not that they will be realized based on consideration of available evidence, including future reversal of existing taxable temporary differences, future projected taxable income, and tax-planning strategies. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. The Company's analysis in determining the deferred tax asset valuation allowance involves management judgment and assumptions.
Share Based Compensation	Share Based Compensation The Company recognizes the grant-date fair value of stock-based compensation issued to employees and directors in general and administrative expenses on the consolidated statements of operations and comprehensive income. The Company's stock-based compensation awards, which are generally equity classified, are measured at grant date fair value, and amortized on a straight-line basis over the vesting period and are not subsequently re-measured. At December 31, 2018, the Company had one share based compensation plan, which is discussed in "Note 13. Stock-Based Compensation". The compensation cost is based on awards that are scheduled to vest and adjusted for forfeitures at the time the forfeitures occur.
Recently Issued Accounting Pronouncements Adopted and Not Yet Adopted	Recently Issued Accounting Pronouncements Adopted Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) and related updates Under ASU No. 2014-09, an entity is required to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those promised goods or services. The standard allows either a full or modified retrospective method of adoption. January 2018 The Company adopted ASU No. 2014-09 and the related subsequent updates on a modified retrospective basis. The Company has included "Note 3. Revenue Recognition" to address the incremental disclosures pertaining to the new standard which enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities Under ASU No. 2016-01, investments in equity securities are generally required to be measured at fair value with changes in fair value recognized in net income. Historically, changes in fair value were reported as a separate component of comprehensive income until realized. January 2018 The Company adopted ASU No. 2016-01 on a modified retrospective basis. The Company adopted ASU No. 2016-01 on January 1, 2018, resulting in a net unrealized gain of $275 on available-for-sale equity securities as an adjustment to accumulated comprehensive income with a corresponding adjustment to the opening balance of distributions in excess of accumulated net income. Recently Issued Accounting Pronouncements Adopted, continued Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2016-15, Statement of Cash Flows ASU No. 2016-15 reduces existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows, including payment of debt extinguishment costs, settlement of zero-coupon bonds, insurance claim proceeds, and distributions from equity method investees. January 2018 The Company adopted ASU No. 2016-15 on a retrospective basis. The Company determined that this standard did not have a significant impact on the consolidated financial statements. ASU No. 2016-18, Statement of Cash Flows ASU No. 2016-18 requires an entity to explain the changes in the combined total of restricted and unrestricted cash in the statement of cash flows. January 2018 Upon the Company’s retrospective method adoption, the Company includes amounts generally described as restricted cash with cash and cash equivalents. For the years ended December 31, 2017 and 2016, the adoption resulted in a net $9,194 decrease and $8,200 increase, respectively, in net cash provided by (used in) investing activities. ASU No. 2017-05, Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20) ASU No. 2017-05, which adds guidance for partial sales of nonfinancial assets and clarifies the scope of Subtopic 610-20, Gains and Losses from the Derecognition of Nonfinancial Assets, applies to the derecognition of all nonfinancial assets (including real estate) for which the counterparty is not a customer. The new guidance requires an entity to derecognize a nonfinancial asset in a partial sale transaction when it ceases to have a controlling financial interest in the asset and has transferred control of the asset and generally requires full gain be recognition. January 2018 For property sales where the Company has no continuing involvement, there should be no change to the Company's timing of gain or loss recognition. The Company adopted ASU No. 2017-05 in conjunction with the new revenue standard on January 1, 2018, resulting in deferred gains of $12,756 recognized through beginning distributions in excess of accumulated net income, as discussed in "Note 6. Investment in Consolidated and Unconsolidated Entities". ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities ASU No. 2017-12 is intended to better align the results of cash flow and fair value hedge accounting with risk-management activities through changes to both the designation and measurement guidance for qualifying hedging relationships in the financial statements. October 2018 The Company early adopted ASU No. 2017-12 on a modified retrospective basis. The Company determined that this standard did not have a significant impact on the consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement ASU No. 2018-13 is intended to improve the effectiveness of the disclosures required by Topic 820, Fair Value Measurement by eliminating, amending, or adding certain disclosures. Certain amendments require a prospective transition method, while others require a retrospective transition method. The guidance is effective for all entities for fiscal years beginning after December 15, 2019, and early adoption is permitted. January 2020 The Company is continuing to evaluate this guidance, but expects the standard to only impact fair value measurement disclosures and therefore should have no impact on the Company's financial position, results of operations, or cash flows. Recently Issued Accounting Pronouncements Not Yet Adopted, continued Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2016-02, Leases, (Topic 842) and related updates ASU No. 2016-02 amends the existing guidance for lease accounting for both parties to a lease contract (i.e. lessees and lessors). ASU No. 2016-02 will be effective for annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The new standard requires a modified retrospective transition method for all leases existing at the date of initial application, with an option to use certain practical expedients available. Lessee Accounting: Lessor Accounting Topic 842 requires lessors to classify leases as a sales-type, direct financing, or operating lease. A lease is a sales-type lease if any one of five criteria are met, each of which indicate that the lease, in effect, transfers control of the underlying asset to the lessee. If none of those five criteria are met, but two additional criteria are both met, indicating that the lessor has transferred substantially all the risks and benefits of the underlying asset to the lessee and a third party, the lease is a direct financing lease. All leases that are not sales-type or direct financing leases are operating leases. January 2019 The Company will adopt the new standard and related updates on a modified retrospective basis on January 1, 2019 and will apply the effective date method in which the elected practical expedients will be applied consistently to all leases commenced before the effective date of January 1, 2019. The Company's comparative periods will not be restated. Any other recently issued accounting standards or pronouncements not disclosed above have been excluded as they are either not relevant to the Company, or are not expected to have a material effect on the consolidated financial statements of the Company.

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Recently Issued Accounting Pronouncements Adopted/Not Yet Adopted	Recently Issued Accounting Pronouncements Adopted Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) and related updates Under ASU No. 2014-09, an entity is required to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those promised goods or services. The standard allows either a full or modified retrospective method of adoption. January 2018 The Company adopted ASU No. 2014-09 and the related subsequent updates on a modified retrospective basis. The Company has included "Note 3. Revenue Recognition" to address the incremental disclosures pertaining to the new standard which enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities Under ASU No. 2016-01, investments in equity securities are generally required to be measured at fair value with changes in fair value recognized in net income. Historically, changes in fair value were reported as a separate component of comprehensive income until realized. January 2018 The Company adopted ASU No. 2016-01 on a modified retrospective basis. The Company adopted ASU No. 2016-01 on January 1, 2018, resulting in a net unrealized gain of $275 on available-for-sale equity securities as an adjustment to accumulated comprehensive income with a corresponding adjustment to the opening balance of distributions in excess of accumulated net income. Recently Issued Accounting Pronouncements Adopted, continued Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2016-15, Statement of Cash Flows ASU No. 2016-15 reduces existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows, including payment of debt extinguishment costs, settlement of zero-coupon bonds, insurance claim proceeds, and distributions from equity method investees. January 2018 The Company adopted ASU No. 2016-15 on a retrospective basis. The Company determined that this standard did not have a significant impact on the consolidated financial statements. ASU No. 2016-18, Statement of Cash Flows ASU No. 2016-18 requires an entity to explain the changes in the combined total of restricted and unrestricted cash in the statement of cash flows. January 2018 Upon the Company’s retrospective method adoption, the Company includes amounts generally described as restricted cash with cash and cash equivalents. For the years ended December 31, 2017 and 2016, the adoption resulted in a net $9,194 decrease and $8,200 increase, respectively, in net cash provided by (used in) investing activities. ASU No. 2017-05, Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20) ASU No. 2017-05, which adds guidance for partial sales of nonfinancial assets and clarifies the scope of Subtopic 610-20, Gains and Losses from the Derecognition of Nonfinancial Assets, applies to the derecognition of all nonfinancial assets (including real estate) for which the counterparty is not a customer. The new guidance requires an entity to derecognize a nonfinancial asset in a partial sale transaction when it ceases to have a controlling financial interest in the asset and has transferred control of the asset and generally requires full gain be recognition. January 2018 For property sales where the Company has no continuing involvement, there should be no change to the Company's timing of gain or loss recognition. The Company adopted ASU No. 2017-05 in conjunction with the new revenue standard on January 1, 2018, resulting in deferred gains of $12,756 recognized through beginning distributions in excess of accumulated net income, as discussed in "Note 6. Investment in Consolidated and Unconsolidated Entities". ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities ASU No. 2017-12 is intended to better align the results of cash flow and fair value hedge accounting with risk-management activities through changes to both the designation and measurement guidance for qualifying hedging relationships in the financial statements. October 2018 The Company early adopted ASU No. 2017-12 on a modified retrospective basis. The Company determined that this standard did not have a significant impact on the consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement ASU No. 2018-13 is intended to improve the effectiveness of the disclosures required by Topic 820, Fair Value Measurement by eliminating, amending, or adding certain disclosures. Certain amendments require a prospective transition method, while others require a retrospective transition method. The guidance is effective for all entities for fiscal years beginning after December 15, 2019, and early adoption is permitted. January 2020 The Company is continuing to evaluate this guidance, but expects the standard to only impact fair value measurement disclosures and therefore should have no impact on the Company's financial position, results of operations, or cash flows. Recently Issued Accounting Pronouncements Not Yet Adopted, continued Standard Description Date of adoption Effect on the financial statements or other significant matters ASU No. 2016-02, Leases, (Topic 842) and related updates ASU No. 2016-02 amends the existing guidance for lease accounting for both parties to a lease contract (i.e. lessees and lessors). ASU No. 2016-02 will be effective for annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The new standard requires a modified retrospective transition method for all leases existing at the date of initial application, with an option to use certain practical expedients available. Lessee Accounting: Lessor Accounting Topic 842 requires lessors to classify leases as a sales-type, direct financing, or operating lease. A lease is a sales-type lease if any one of five criteria are met, each of which indicate that the lease, in effect, transfers control of the underlying asset to the lessee. If none of those five criteria are met, but two additional criteria are both met, indicating that the lessor has transferred substantially all the risks and benefits of the underlying asset to the lessee and a third party, the lease is a direct financing lease. All leases that are not sales-type or direct financing leases are operating leases. January 2019 The Company will adopt the new standard and related updates on a modified retrospective basis on January 1, 2019 and will apply the effective date method in which the elected practical expedients will be applied consistently to all leases commenced before the effective date of January 1, 2019. The Company's comparative periods will not be restated.

Acquired Properties (Tables)

Acquired Properties (Tables)	12 Months Ended
	Dec. 31, 2018
Asset Acquisition [Abstract]
Schedule of acquisitions	The following table reflects the retail properties acquired, accounted for as asset acquisitions, during the year ended December 31, 2018 : Acquisition Date Property Metropolitan Statistical Area ("MSA") Gross Acquisition Price Square Feet May 16, 2018 PGA Plaza (a) Miami-Fort Lauderdale-West Palm Beach, FL $ 88,000 120,000 May 30, 2018 Kennesaw Marketplace (a) Atlanta-Sandy Springs-Roswell, GA 64,300 117,000 September 13, 2018 Kennesaw Marketplace, Phase 3 Atlanta-Sandy Springs-Roswell, GA 7,500 13,000 December 13, 2018 Peachland Promenade, Phase 2 Cape Coral-Fort Myers, FL 18,700 95,000 December 21, 2018 Sandy Plains Centre (a) Atlanta-Sandy Springs-Roswell, GA 44,100 125,000 Total $ 222,600 470,000 (a) These acquisitions were made through three consolidated VIEs and used to facilitate Reverse 1031 Exchanges. During the last quarter of 2018, the title of PGA Plaza and Kennesaw Marketplace transferred to the Company through the completions of an exchange and expiration of the 180-day waiting period, respectively. The following table reflects the retail properties acquired, accounted for as asset acquisitions, during the year ended December 31, 2017 : Acquisition Date Property MSA Gross Acquisition Price Square Feet January 6, 2017 Campus Marketplace (a) San Diego-Carlsbad, CA $ 73,350 144,000 February 1, 2017 Paraiso Parc and Westfork Plaza Miami-Fort Lauderdale-West Palm Beach, FL 163,000 393,000 February 21, 2017 The Shops at Town Center Washington-Arlington-Alexandria, DC-VA-MD-WV 53,550 125,000 August 14, 2017 Cary Park Town Center Raleigh-Cary, NC 25,000 93,000 August 18, 2017 The Parke Austin-Round Rock, TX 112,250 364,000 August 18, 2017 The Plaza Midtown Atlanta-Sandy Springs-Roswell, GA 31,800 70,000 September 14, 2017 River Oaks (b) San Jose-Sunnyvale-Santa Clara, CA 115,000 275,000 September 21, 2017 Kyle Marketplace (b) Austin-Round Rock, TX 59,475 226,000 Total $ 633,425 1,690,000 (a) As part of this acquisition, the Company assumed mortgage debt of $41,717 as reported within non-cash financing activities on the consolidated statements of cash flows for the year ended December 31, 2017 . (b) These asset acquisitions were structured as Reverse 1031 Exchanges. During the first quarter of 2018, the title of Kyle Marketplace and River Oaks transferred to the Company through the completion of an exchange and expiration of the 180-day waiting period, respectively.
Schedule of recognized identified assets acquired and liabilities assumed	The following table summarizes the estimated fair value of the retail properties' assets acquired and liabilities assumed for the years ended December 31, 2018 and 2017: 2018 Acquisitions 2017 Acquisitions Land $ 40,435 $ 125,990 Building and other improvements 166,058 440,204 Total investment properties 206,493 566,194 Intangible assets (a) 21,584 69,306 Intangible liabilities (b) (6,215 ) (19,099 ) Net other assets and liabilities 738 17,024 Total fair value of assets acquired and liabilities assumed $ 222,600 $ 633,425 (a) Intangible assets include in-place leases and above-market leases. (b) Intangible liabilities include below-market leases.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of minimum lease payments under operating leases	Minimum lease payments to be received under long-term operating leases and short-term specialty leases, excluding additional percentage rent based on tenants' sales volume and tenant reimbursements of certain operating expenses, and assuming no exercise of renewal options or early termination rights, are as follows: For the year ending December 31, Minimum Lease Payments 2019 $ 151,874 2020 139,290 2021 124,366 2022 103,204 2023 83,744 Thereafter 282,629 Total $ 885,107 Future minimum lease obligations under these leases as of December 31, 2018, were as follows: Future Minimum Base Rent Payments Operating Leases Capital Leases 2019 $ 717 $ 532 2020 611 532 2021 494 519 2022 466 317 2023 479 40 Thereafter 1,041 — Total expected minimum lease obligations $ 3,808 1,940 Less: Amount representing interest (a) (151 ) Present value of net minimum lease payments (b) $ 1,789 (a) Interest includes the amount necessary to reduce the total expected minimum lease obligations to present value calculated at the Company's incremental borrowing rate. (b) The present value of net minimum lease payments are presented in other liabilities in the accompanying consolidated balance sheets.
Disaggregation of Other Fee Income	The following table reflects the disaggregation of other fee income: Year Ended December 31, 2018 2017 2016 Property management fee $ 2,626 $ 2,794 $ 2,701 Asset management fee 1,080 1,213 1,213 Leasing commissions and other fees 684 215 434 Other fee income $ 4,390 $ 4,222 $ 4,348

Disposed Properties (Tables)

Disposed Properties (Tables)	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Not Discontinued Operations, Disposal Activity	The following retail properties were disposed of during the year ended December 31, 2018 : Date Property Square Feet Gross Disposition Price Gain (Loss) on Sale and Transfer of Investment Properties, net Gain (Loss) on Extinguishment of Debt (d) January 9, 2018 Sherman Town Center I & II 485,000 $ 63,000 $ 12,382 $ — January 25, 2018 Grafton Commons 239,000 33,500 6,564 — March 8, 2018 Lakeport Commons 283,000 31,000 (666 ) — March 21, 2018 Stonecrest Marketplace (a) 265,000 — 1,777 10,752 March 31, 2018 Northwest Marketplace (b) — — 248 — April 17, 2018 Market at Morse/Hamilton 45,000 10,000 1,592 — May 24, 2018 Siegen Plaza 156,000 29,000 3,849 (54 ) June 20, 2018 Tomball Town Center 67,000 22,750 7,184 — June 26, 2018 Bellerive Plaza (c) 76,000 — (22 ) 1,694 June 28, 2018 Parkway Centre North 143,000 23,700 5,357 (1,695 ) September 14, 2018 Tulsa Hills 473,000 70,000 13,476 — October 5, 2018 McKinney Town Center 243,000 51,000 15,430 — October 5, 2018 Riverstone Shopping Center 273,000 27,750 (320 ) (1,540 ) October 23, 2018 Hiram Pavilion 363,000 44,350 22,124 — November 19, 2018 Poplin Place 228,000 28,300 2,841 — November 20, 2018 Walden Park 34,000 5,325 5 — December 20, 2018 Streets of Cranberry 108,000 26,500 3,276 — 3,481,000 $ 466,175 $ 95,097 $ 9,157 (a) On March 21, 2018, the Company surrendered Stonecrest Marketplace, with a carrying value of $23,932 , to the lender in satisfaction of non-recourse debt with an initial maturity date of March 1, 2017 and recognized a gain on transfer of assets, net, of $1,777 . The Company is not aware of any material outstanding commitments and contingencies related to Stonecrest Marketplace. (b) The Company recognized a gain on sale of $248 related to the completion of a partial condemnation at this retail property. (c) On June 26, 2018, the Company surrendered Bellerive Plaza, with a carrying value of $4,771 , to the lender in satisfaction of non-recourse debt with an initial maturity date of June 1, 2017. The Company recognized a loss on transfer of assets, net, of $22 . The Company is not aware of any material outstanding commitments and contingencies related to Bellerive Plaza. (d) In addition to the gain or loss on extinguishment of debt recognized as a result of the disposition of retail properties, the Company extinguished an additional loan on a retail property resulting in a loss on debt extinguishment of $4 . In aggregate, the Company recognized net proceeds of $430,514 from the sales, surrender, and condemnation of these retail properties on the consolidated statement of cash flows during the year ended December 31, 2018 . The following retail properties were disposed of during the year ended December 31, 2017 : Date Property Square Feet Gross Disposition Price Gain (Loss) on Sale and Transfer of Investment Properties, net Gain (Loss) on Extinguishment of Debt January 10, 2017 Penn Park 242,000 $ 29,050 $ 1,021 $ — May 17, 2017 Intech Retail (a) — — (52 ) 882 May 19, 2017 Sparks Crossing 336,000 40,280 10,559 — June 23, 2017 Lincoln Village 164,000 30,000 2,355 — June 30, 2017 Market at Westlake (b) — — 473 — July 31, 2017 Pavilions at Hartman Heritage 223,000 21,700 (1,736 ) — July 31, 2017 Legacy Crossing 134,000 10,250 (211 ) (1 ) September 28, 2017 Heritage Plaza 132,000 21,350 9,189 (41 ) November 7, 2017 Crossroads at Chesapeake (c) — 1,250 834 — December 21, 2017 Scofield Crossing (d) — 2,936 2,247 — December 28, 2017 Dothan Plaza 327,000 33,750 (613 ) — 1,558,000 $ 190,566 $ 24,066 $ 840 (a) On May 17, 2017, the Company surrendered Intech Retail, with a carrying value of $2,338 , to the lender in satisfaction of non-recourse debt with an initial maturity date of November 1, 2016 and recognized a loss on transfer of assets, net, of $52 . The Company is not aware of any material outstanding commitments and contingencies related to Intech Retail. (b) The Company recognized a gain on sale of $473 related to the completion of a partial condemnation at this retail property. (c) The Company recognized a gain on sale of $834 from the disposal of a single-user outparcel at this retail property. (d) The Company recognized a gain on sale of $2,247 from the disposal of a single-user outparcel at this retail property.
Summary of Components of Discontinued Operations	Discontinued operations for the year ended December 31, 2016 also includes Highlands and University House. Year ended December 31, 2017 2016 Total income $ 3,935 $ 92,329 Depreciation and amortization expense 1,205 32,667 Other expenses 2,308 36,487 Provision for asset impairment — 106,514 Operating income (loss) from discontinued operations 422 (83,339 ) Interest expense, income taxes, and other miscellaneous income (6,696 ) (17,983 ) Equity in losses of unconsolidated entity — (19 ) Gain on sale of investment in unconsolidated entity — 1,434 Gain on sale of properties, net 10,115 236,256 Loss on extinguishment of debt (2 ) (2,826 ) Net income from discontinued operations 3,839 133,523 Net income from discontinued operations attributable to Company $ 3,839 $ 133,523 Weighted average number of common shares outstanding, basic and diluted 773,445,341 854,638,497 Net income per common share, from discontinued operations, basic and diluted $ — $ 0.15

Investment in Consolidated an_2

Investment in Consolidated and Unconsolidated Entities (Tables)	12 Months Ended
	Dec. 31, 2018
Investment in Partially Owned Entities [Abstract]
Schedule of Variable Interest Entities	December 31, 2018 December 31, 2017 Net investment properties $ 39,634 $ 165,875 Other assets 4,457 18,630 Total assets 44,091 184,505 Other liabilities 385 11,343 Total liabilities 385 11,343 Net assets $ 43,706 $ 173,162
Schedule of net equity investment and share of net income or loss	Carrying Value of Investment at December 31, Entity Description Ownership % 2018 2017 IAGM Retail Fund I, LLC (a) Multi-tenant retail shopping centers 55% $ 126,195 $ 123,693 Downtown Railyard Venture, LLC (b) Land development 90% 30,049 57,183 Other unconsolidated entities Various real estate investments Various (112 ) (112 ) $ 156,132 $ 180,764 (a) On April 17, 2013 , the Company entered into a joint venture, IAGM, for the purpose of acquiring, owning, managing, supervising, and disposing of properties and sharing in the profits and losses from those properties and its activities. The Company is the managing member of IAGM, responsible for the day-to-day activities and earns fees for venture management, property management, leasing and other services provided. The Company contributed 14 properties to IAGM during the year ended December 31, 2013, and treated the contribution as a partial sale under ASC 360-20, Property, Plant and Equipment - Real Estate Sales, and deferred an aggregate gain of $15,625 as a result of the property sales into the joint venture. Through December 31, 2017, the Company was amortizing the basis adjustment over 30 years , consistent with the depreciation period of the investee's underlying assets. In accordance with the provisions of ASU No. 2017-05, full gain recognition may be required for property sales in which the Company has continuing involvement, where those gains may have been deferred under prior GAAP. As of January 1, 2018, with the adoption of ASU No. 2017-05, the Company's remaining $12,756 of the aforementioned deferred gain has been recognized through beginning distributions in excess of accumulated net income. (b) On September 30, 2015 , the Company was admitted as a member to Downtown Railyard Venture, LLC ("DRV"), which is a joint venture established in order to develop and sell a land development in Sacramento, California. Simultaneously, the Company structured and closed the sale of a non-core land development to DRV, which for accounting purposes is treated as a contribution of the land development to DRV in exchange for an equity interest of $46,174 in DRV. Concurrent with the formation of the joint venture, and included in the basis of the Company's investment in DRV, the Company established an $18,088 loan to DRV at a 4.0% interest rate, compounded annually. The loan matures on June 30, 2023. The Company's ownership percentage in DRV is based upon a waterfall calculation outlined in the operating agreement. The joint venture partner is the developer and managing member of DRV, responsible for the day-to-day activities and earns fees for managing the venture.
Schedule of Combined Financial Information of Investment in Unconsolidated Entities	The following tables present the combined financial information for the Company’s investments in unconsolidated entities. As of December 31, 2018 December 31, 2017 (unaudited) (unaudited) Assets: Real estate assets, net of accumulated depreciation $ 494,583 $ 586,671 Other assets 103,565 73,423 Total assets 598,148 660,094 Liabilities and equity: Mortgage debt, net 272,629 311,574 Other liabilities 42,569 49,032 Equity 282,950 299,488 Total liabilities and equity 598,148 660,094 Company’s share of equity 185,814 193,572 Impairment of investment in unconsolidated entity (29,933 ) — Cost of investments in excess of the Company's share of underlying net book value, net of accumulated amortization of $0 and $2,647, respectively. 251 (12,808 ) Carrying value of investments in unconsolidated entities $ 156,132 $ 180,764 Year ended December 31, 2018 2017 2016 (unaudited) (unaudited) (unaudited) Revenues $ 58,322 $ 62,367 $ 70,385 Expenses: Depreciation and amortization 21,001 26,860 27,209 Operating expenses, ground rent and general and administrative expenses 19,732 22,304 21,671 Provision for asset impairment 3,673 4,745 — Total operating expenses 44,406 53,909 48,880 Operating income 13,916 8,458 21,505 Interest expense and loan cost amortization (13,205 ) (13,419 ) (13,015 ) (Loss) gain on sale of real estate (4,123 ) 434 — Loss on debt extinguishment (20 ) — — Net (loss) income $ (3,432 ) $ (4,527 ) $ 8,490 Company's share of net (loss) income, net of excess basis depreciation of $0, $520, and $520, respectively $ (1,870 ) $ (1,930 ) $ 4,109 Distributions from unconsolidated entities in excess of the investments' carrying value 410 1,126 5,190 Impairment of investment in unconsolidated entity (29,933 ) — — Equity in (losses) earnings and (impairment), net, of unconsolidated entities $ (31,393 ) $ (804 ) $ 9,299
Schedule of Maturities of Long-term Debt	The following table shows the scheduled maturities of the Company's unconsolidated entities' total third party mortgage debt of $275,308 as of December 31, 2018 , for each of the next five years, and thereafter: Maturities during the year ending December 31, 2019 2020 2021 2022 2023 Thereafter Total Mortgages payable $ 31,353 $ — $ 23,150 $ — $ 180,125 $ 40,680 $ 275,308

Intangible Assets, Liabilitie_2

Intangible Assets, Liabilities, and Deferred Leasing Costs (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill	The following table summarizes the Company’s identified intangible assets, liabilities, and deferred leasing costs as of December 31, 2018 and 2017 . As of December 31, 2018 2017 Intangible assets: Acquired in-place leases $ 156,004 $ 226,515 Acquired above-market leases 22,353 29,670 Intangible assets 178,357 256,185 Accumulated amortization: Accumulated amortization, acquired in-place leases (58,203 ) (123,043 ) Accumulated amortization, above-market leases (12,149 ) (17,731 ) Accumulated amortization (70,352 ) (140,774 ) Intangible assets, net $ 108,005 $ 115,411 Intangible liabilities: Acquired below-market leases $ 74,312 $ 80,862 Accumulated amortization, acquired below-market leases (27,327 ) (27,330 ) Intangible liabilities, net $ 46,985 $ 53,532 Deferred leasing costs: Leasing costs $ 18,236 $ 17,355 Accumulated amortization (8,018 ) (8,642 ) Deferred leasing costs, net $ 10,218 $ 8,713
Schedule of Identified Intangible Assets and Liabilities	The following table provides a summary of the amortization related to intangible assets, liabilities, and deferred leasing costs for the years ended December 31, 2018, 2017 and 2016 : Year ended December 31, 2018 2017 2016 Intangible assets: In-place lease intangibles (a) $ 22,523 $ 22,580 $ 18,298 Above-market leases (b) 3,036 3,053 2,581 Amortization of intangible assets $ 25,559 $ 25,633 $ 20,879 Intangible liabilities: Amortization of below-market leases (c) $ 8,570 $ 8,563 $ 6,676 Deferred leasing costs: Amortization of deferred leasing costs (a) $ 2,036 $ 1,806 $ 1,703 (a) Amounts are recorded as depreciation and amortization. (b) Amounts are recorded as a reduction to rental income. (c) Amounts are recorded as an increase to rental income.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The following table provides a summary of the amortization during the next five years and thereafter related to deferred costs and intangible assets and liabilities as of December 31, 2018 : Year ending December 31, In-place leases Above market leases Deferred leasing costs Below market leases 2019 $ 19,243 $ 2,220 $ 2,475 $ 7,349 2020 16,114 1,870 1,724 6,596 2021 12,794 1,512 1,581 5,578 2022 9,742 982 1,369 4,478 2023 8,000 777 966 3,438 Thereafter 31,908 2,843 2,103 19,546 Total $ 97,801 $ 10,204 $ 10,218 $ 46,985

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Debt	As of December 31, 2018 , the Company had the following borrowings outstanding under its unsecured term loans: Principal Balance Interest Rate Maturity Date $250.0 million 5 year - swapped to fixed rate (a) $ 90,000 2.5510% December 21, 2023 $250.0 million 5 year - swapped to fixed rate (b) 60,000 2.5525% December 21, 2023 $250.0 million 5 year - variable rate (c) 50,000 3.5493% December 21, 2023 $250.0 million 5 year - variable rate (d) 26,000 3.6794% December 21, 2023 $150.0 million 5.5 year - variable rate (c) 100,000 3.5493% June 21, 2024 $150.0 million 5.5 year - variable rate (d) 26,000 3.6794% June 21, 2024 Total unsecured term loans 352,000 Issuance costs, net of accumulated amortization (e) (3,145 ) Total outstanding credit agreements, net $ 348,855 (a) The Company swapped $90,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.2% to a fixed rate of 2.5510% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $90,000 . (b) The Company swapped $60,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.2% to a fixed rate of 2.5525% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $60,000 . (c) Interest rate reflects 1-Month LIBOR plus 1.20% as of December 3, 2018. (d) Interest rate reflects 1-Month LIBOR plus 1.20% as of December 21, 2018. (e) Reflects issuance costs, net of accumulated amortization, of $1,966 related to the December 21, 2018 term loans, and $1,179 related to the November 5, 2015 term loans. In accordance with the Company's accounting policy for debt modification, the Company did not write-off the issuance costs associated with the modification of the November 5, 2015 term loans as it did not meet the criteria of a substantial modification. As of December 31, 2017, the Company had the following borrowings outstanding under its unsecured term loan: Principal Balance Interest Rate Maturity Date 5 year - swapped to fixed rate (a) $ 90,000 2.6510% January 15, 2021 5 year - swapped to fixed rate (b) 60,000 2.6525% January 15, 2021 5 year - variable rate (c) 50,000 2.6607% January 15, 2021 7 year - variable rate (d) 100,000 2.9607% November 5, 2022 Total unsecured term loans 300,000 Issuance costs, net of accumulated amortization (1,615 ) Total outstanding credit agreements, net $ 298,385 (a) The Company swapped the $90,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.3% to a fixed rate of 2.6510% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $90,000 . (b) The Company swapped $60,000 of variable rate debt at an interest rate of 1-Month LIBOR plus 1.3% to a fixed rate of 2.6525% . The swap has an effective date of December 10, 2015 , a termination date of December 1, 2019 , and a notional amount of $60,000 . (c) Interest rate reflects 1-Month LIBOR plus 1.3% as of December 31, 2017. (d) Interest rate reflects 1-Month LIBOR plus 1.6% as of December 31, 2017. As of December 31, 2018 and 2017, the Company had the following mortgages payable outstanding: December 31, 2018 December 31, 2017 Mortgages payable (a) $ 213,925 $ 370,804 Premium, net of accumulated amortization 239 478 Discount, net of accumulated amortization (158 ) (195 ) Debt issuance costs, net of accumulated amortization (1,079 ) (1,611 ) Total mortgages payable, net $ 212,927 $ 369,476 (a) Mortgages payable had fixed interest rates ranging from 3.49% to 5.49% , with a weighted average interest rate of 4.33% as of December 31, 2018 , and 3.49% to 10.45% (for both conforming loans and loans in default), with a weighted average interest rate of 5.13% as of December 31, 2017 .
Schedule Of Maturities For Outstanding Mortgage Indebtedness	The following table shows the scheduled maturities of the Company's mortgages payable as of December 31, 2018, for each of the next five years, and thereafter: Maturities during the year ending December 31, 2019 2020 2021 2022 2023 Thereafter Total Mortgages payable $ — $ 41,000 $ 12,557 $ 50,748 $ 41,740 $ 67,880 $ 213,925
Schedule of Effect of Derivative Financial Instruments Included in AOCI	The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements: Location and amount of gain recognized in accumulated comprehensive income Location and amount of gain (loss) reclassified from accumulated comprehensive income into net income Total interest expense presented in the consolidated statements of operations in which the effects of cash flow hedges are recorded 2018 2017 2016 2018 2017 2016 2018 2017 2016 Unrealized gain on derivatives $ 923 1,183 623 Interest expense, net $ 956 (423 ) (1,295 ) Interest expense, net $ 24,943 30,155 44,135
Schedule of Location of Derivative Financial Instruments on Consolidated Financial Statements	The following table represents the effect of the derivative financial instruments on the accompanying consolidated financial statements: Location and amount of gain recognized in accumulated comprehensive income Location and amount of gain (loss) reclassified from accumulated comprehensive income into net income Total interest expense presented in the consolidated statements of operations in which the effects of cash flow hedges are recorded 2018 2017 2016 2018 2017 2016 2018 2017 2016 Unrealized gain on derivatives $ 923 1,183 623 Interest expense, net $ 956 (423 ) (1,295 ) Interest expense, net $ 24,943 30,155 44,135

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Quantitative Disclosure of The Fair Value For Each Major Category Of Assets And Liabilities	For assets and liabilities measured at fair value on a recurring basis, quantitative disclosure of the fair value for each major category of assets and liabilities is presented below: Fair Value Measurements at December 31, 2018 Level 1 Level 2 Level 3 Derivative interest rate swaps $ — $ 1,637 $ — Total assets $ — $ 1,637 $ — Fair Value Measurements at December 31, 2017 Level 1 Level 2 Level 3 Available-for-sale marketable securities $ 4,431 $ — $ — Real estate related bonds — 327 — Derivative interest rate swaps — 1,670 — Total assets $ 4,431 $ 1,997 $ —
Assets Measured at Fair Value on Non-Recurring Basis	The following table summarizes activity for the Company’s assets measured at fair value on a non-recurring basis and the related impairment losses for the years ended December 31, 2018, 2017, and 2016: As of December 31, 2018 As of December 31, 2017 As of December 31, 2016 Level 3 Impairment Loss Level 3 Impairment Loss Level 3 Impairment Loss Investment properties, continuing operations $ 64,075 $ 3,510 $ 105,900 $ 27,754 $ 66,323 $ 11,208 Investment properties, discontinued operations — — — — 584,358 106,514 Investment in unconsolidated entities 30,049 29,933 — — — — Total $ 33,443 $ 27,754 $ 117,722
Fair Value of Financial Instruments Presented at Carrying Values	The following table represents the estimated fair value of financial instruments presented at carrying values in the consolidated financial statements as of December 31, 2018 and 2017 : December 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Mortgages payable $ 213,925 $ 212,572 $ 370,804 $ 372,962 Term loans $ 352,000 $ 352,006 n/a n/a Line of credit and term loans n/a n/a $ 300,000 $ 299,770

Income Taxes Income Taxes (Tabl

Income Taxes Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense for the years ended December 31, 2018, 2017, and 2016 are as follows: 2018 2017 2016 Federal State Total Federal State Total Federal State Total Current $ (169 ) $ 199 $ 30 $ 781 $ 543 $ 1,324 $ 130 $ 71 $ 201 Deferred — — — — — — — — — Income tax provision from continuing operations $ (169 ) $ 199 $ 30 $ 781 $ 543 $ 1,324 $ 130 $ 71 $ 201 Income tax (benefit) provision from discontinued operations $ — $ — $ — $ (3 ) $ (5 ) $ (8 ) $ (1 ) $ 268 $ 267
Schedule of Deferred Tax Assets and Liabilities	The components of the deferred tax assets and liabilities at December 31, 2018 and 2017 were as follows: 2018 2017 Basis difference on investment in unconsolidated entities (a) (b) $ 27,351 $ 27,916 Total deferred tax assets 27,351 27,916 Less: Valuation allowance (27,351 ) (27,916 ) Net deferred tax assets — — Deferred tax liabilities $ — $ — (a) Primarily relates to the basis difference in land of a non-core land development held by DRV. (b) As a result of recent U.S. federal income tax reform, the Company has applied a federal corporate tax rate of 21% and a California state rate of 8.84% to determine deferred tax assets and liabilities at December 31, 2018.
Nature of Common Distributions Paid	A summary of the taxable nature of the Company’s common distributions paid for each of the years in the three year period ended December 31, 2018 is as follows: For the year ended December 31, 2018 2017 2016 Ordinary income $ 0.028 $ — $ 0.080 Capital gain — — 0.240 Return of capital 0.043 0.069 0.150 Total distributions per share $ 0.071 $ 0.069 $ 0.470

Earnings Per Share and Equity_2

Earnings Per Share and Equity Transactions (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles the amounts used in calculating basic and diluted income per share: Year ended December 31, 2018 2017 2016 Numerator: Net income from continuing operations $ 83,849 $ 57,954 $ 119,199 Earnings allocated to unvested restricted shares (95 ) (15 ) (10 ) Net income from continuing operations attributable to common shareholders $ 83,754 $ 57,939 $ 119,189 Net income from discontinued operations attributable to common shareholders $ — $ 3,839 $ 133,523 Denominator: Weighted average number of common shares outstanding - basic 761,139,011 773,445,341 854,638,497 Effect of unvested restricted shares 926,463 1,155,138 62,258 Weighted average number of common shares outstanding - diluted 762,065,474 774,600,479 854,700,755 Basic and diluted income per common share: Net income from continuing operations per share $ 0.11 $ 0.07 $ 0.14 Net income from discontinued operations per share — — 0.15 Net income per share $ 0.11 $ 0.07 $ 0.29

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Restricted Stock Unit Activity	A summary of the Company's restricted stock unit activity during the years ended December 31, 2018 , 2017 and 2016 is as follows: Unvested Restricted Stock Units Weighted Average Grant Date Price Per Share (a) Outstanding as of January 1, 2016 951,555 $4.00 Shares granted 2,410,341 $3.14 Shares vested (1,096,480) $3.48 Shares forfeited (618,893) $3.47 Outstanding as of December 31, 2016 1,646,523 $3.29 Shares granted 2,019,078 $3.29 Shares vested (1,750,773) $3.38 Shares forfeited (379,323) $3.25 Outstanding as of December 31, 2017 1,535,505 $3.19 Shares granted 1,950,307 $3.14 Shares vested (1,349,852) $3.20 Shares forfeited (587,810) $3.19 Outstanding as of December 31, 2018 1,548,150 $3.18 (a) On an annual basis, the Company engages an independent third-party valuation advisory consulting firm to estimate the per share value of the Company's common stock.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of minimum lease obligations under non-cancelable ground leases	Minimum lease payments to be received under long-term operating leases and short-term specialty leases, excluding additional percentage rent based on tenants' sales volume and tenant reimbursements of certain operating expenses, and assuming no exercise of renewal options or early termination rights, are as follows: For the year ending December 31, Minimum Lease Payments 2019 $ 151,874 2020 139,290 2021 124,366 2022 103,204 2023 83,744 Thereafter 282,629 Total $ 885,107 Future minimum lease obligations under these leases as of December 31, 2018, were as follows: Future Minimum Base Rent Payments Operating Leases Capital Leases 2019 $ 717 $ 532 2020 611 532 2021 494 519 2022 466 317 2023 479 40 Thereafter 1,041 — Total expected minimum lease obligations $ 3,808 1,940 Less: Amount representing interest (a) (151 ) Present value of net minimum lease payments (b) $ 1,789 (a) Interest includes the amount necessary to reduce the total expected minimum lease obligations to present value calculated at the Company's incremental borrowing rate. (b) The present value of net minimum lease payments are presented in other liabilities in the accompanying consolidated balance sheets.
Schedule of minimum capital lease obligations under non-cancelable ground leases	Future minimum lease obligations under these leases as of December 31, 2018, were as follows: Future Minimum Base Rent Payments Operating Leases Capital Leases 2019 $ 717 $ 532 2020 611 532 2021 494 519 2022 466 317 2023 479 40 Thereafter 1,041 — Total expected minimum lease obligations $ 3,808 1,940 Less: Amount representing interest (a) (151 ) Present value of net minimum lease payments (b) $ 1,789 (a) Interest includes the amount necessary to reduce the total expected minimum lease obligations to present value calculated at the Company's incremental borrowing rate. (b) The present value of net minimum lease payments are presented in other liabilities in the accompanying consolidated balance sheets.

Quarterly Supplemental Financ_2

Quarterly Supplemental Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Supplemental Financial Information [Abstract]
Schedule of quarterly financial information	The following table represents the results of operations, for each quarterly period, during 2018 and 2017: For the quarter ended December 31, 2018 September 30, 2018 June 30, 2018 March 31, 2018 Total income $ 56,491 $ 60,493 $ 61,774 $ 63,916 Net income 17,507 8,947 23,163 34,232 Net income per common share, basic and diluted (a) $0.03 $0.01 $0.03 $0.04 Weighted average number of common shares outstanding, basic and diluted (a) 727,904,818 768,385,770 774,391,881 774,311,254 For the quarter ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total income $ 64,521 $ 62,849 $ 62,152 $ 62,287 Net income from continuing operations 8,285 12,243 34,753 2,673 Net income from discontinued operations (4,474 ) 9,722 (833 ) (576 ) Net income 3,811 21,965 33,920 2,097 Net income per common share, basic and diluted (a) $— $0.03 $0.04 $— Weighted average number of common shares outstanding, basic and diluted (a) 773,562,942 773,517,492 773,381,165 773,316,262 (a) Quarterly net income per common share amounts may not total to the annual amounts due to rounding and the changes in the number of weighted average common shares outstanding

Organization - Narrative (Detai

Organization - Narrative (Details) ft² in Thousands	12 Months Ended
	Dec. 31, 2018ft²joint_ventureproperty	Dec. 31, 2017ft²joint_ventureproperty	Dec. 31, 2016ft²joint_ventureproperty
Organization [Line Items]
Number of retail properties | property			71
Number of joint ventures | joint_venture	2	2	2
Corporate Joint Venture
Organization [Line Items]
Area of real estate property | ft²	2,600	3,000	3,000
Number of managed retail properties | property	13	15	15
Retail
Organization [Line Items]
Number of retail properties | property	1	2
Area of real estate property | ft²	9,500	12,400	12,200
Square Feet | ft²	470	1,690
Retail | CARY PARK TOWN CENTER Cary, NC
Organization [Line Items]
Square Feet | ft²		501
Retail
Organization [Line Items]
Number of retail properties | property	58	71

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net change in net cash used in investing activities	$ 175,414	$ (209,088)	$ 1,078,749
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net change in net cash used in investing activities		(9,194)	8,200
Restricted Cash		0	6,650	$ 4,100
Restatement Adjustment | Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net change in net cash used in investing activities		(6,650)	(2,550)
Restatement Adjustment | General and Administrative Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of non-recoverable payroll		$ (3,706)	$ (4,877)

Basis of Presentation and Sum_5

Basis of Presentation and Summary of Significant Accounting Policies - Real Estate Capitalization and Depreciation (Details)	12 Months Ended
	Dec. 31, 2018
Building and other improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years

Basis of Presentation and Sum_6

Basis of Presentation and Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements Adopted (Details) $ in Thousands	Jan. 01, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Real estate investment trust required distribution (percent)		90.00%
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by (used in) investing activities		$ 175,414	$ (209,088)	$ 1,078,749
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net unrealized gain on available-for-sale equity securities	$ 275
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by (used in) investing activities			(9,194)	$ 8,200
Accounting Standard Update 2017-05
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of ASU			$ 12,756
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset		3,000
Lease liability		$ 3,000
Accounting Standards Update 2016-02 | Measurement Input, Discount Rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Measurement input for finance leased asset		0.044

Acquired Properties - Schedule

Acquired Properties - Schedule of Retail Properties Acquired (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)ft²	Dec. 31, 2016USD ($)	Sep. 30, 2018VIE
Business Acquisition [Line Items]
Loans assumed	$ 0	$ 41,717	$ 16,000
Retail
Business Acquisition [Line Items]
Gross Acquisition Price	$ 222,600	$ 633,425
Square Feet | ft²	470	1,690
Number of VIEs used to facilitate acquisition | VIE				3
Retail | PGA Plaza, Miami-Fort Lauderdale-West Palm Beach, FL
Business Acquisition [Line Items]
Gross Acquisition Price	$ 88,000
Square Feet | ft²	120
Retail | Kennesaw Marketplace, Atlanta-Sandy Springs-Roswell, GA
Business Acquisition [Line Items]
Gross Acquisition Price	$ 64,300
Square Feet | ft²	117
Retail | Kennesaw Marketplace, Phase 3, Atlanta-Sandy Springs-Roswell, GA
Business Acquisition [Line Items]
Gross Acquisition Price	$ 7,500
Square Feet | ft²	13
Retail | Peachland Promenade, Phase 2, Cape Coral-Fort Myers, FL
Business Acquisition [Line Items]
Gross Acquisition Price	$ 18,700
Square Feet | ft²	95
Retail | Sandy Plains Centre, Atlanta-Sandy Springs-Roswell, GA
Business Acquisition [Line Items]
Gross Acquisition Price	$ 44,100
Square Feet | ft²	125
Retail | Campus Marketplace, San Diego-Carlsbad, CA
Business Acquisition [Line Items]
Gross Acquisition Price		$ 73,350
Square Feet | ft²		144
Loans assumed		$ 41,717
Retail | Paraiso Parc and Westfork Plaza, Miami-Fort Lauderdale-West Palm Beach, FL
Business Acquisition [Line Items]
Gross Acquisition Price		$ 163,000
Square Feet | ft²		393
Retail | The Shops at Town Center, Washington-Arlington-Alexandria, DC-VA-MD-WV
Business Acquisition [Line Items]
Gross Acquisition Price		$ 53,550
Square Feet | ft²		125
Retail | Cary Park Town Center, Raleigh-Cary, NC
Business Acquisition [Line Items]
Gross Acquisition Price		$ 25,000
Square Feet | ft²		93
Retail | The Parke, Austin-Round Rock, TX
Business Acquisition [Line Items]
Gross Acquisition Price		$ 112,250
Square Feet | ft²		364
Retail | The Plaza Midtown, Atlanta-Sandy Springs-Roswell, GA
Business Acquisition [Line Items]
Gross Acquisition Price		$ 31,800
Square Feet | ft²		70
Retail | River Oaks, San Jose-Sunnyvale-Santa Clara, CA
Business Acquisition [Line Items]
Gross Acquisition Price		$ 115,000
Square Feet | ft²		275
Retail | Kyle Marketplace, Austin-Round Rock, TX
Business Acquisition [Line Items]
Gross Acquisition Price		$ 59,475
Square Feet | ft²		226

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,019	$ 151,874
2,020	139,290
2,021	124,366
2,022	103,204
2,023	83,744
Thereafter	282,629
Total	885,107
Disaggregation of Revenue [Line Items]
Receivables	$ 778	$ 515	$ 513
Affiliated Entity
Disaggregation of Revenue [Line Items]
Unconsolidated entity, ownership percentage	55.00%
Property management fee
Disaggregation of Revenue [Line Items]
Income	$ 2,626	2,794	2,701
Asset management fee
Disaggregation of Revenue [Line Items]
Income	1,080	1,213	1,213
Leasing commissions and other fees
Disaggregation of Revenue [Line Items]
Income	684	215	434
Other fee income
Disaggregation of Revenue [Line Items]
Income	$ 4,390	$ 4,222	$ 4,348
Minimum
Disaggregation of Revenue [Line Items]
Remaining lease term	1 year
Maximum
Disaggregation of Revenue [Line Items]
Remaining lease term	41 years

Acquired Properties - Narrative

Acquired Properties - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Asset Acquisition [Abstract]
Transaction costs capitalized	$ 430	$ 1,911	$ 220

Acquired Properties - Retail Pr

Acquired Properties - Retail Properties Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
2018 Acquisitions
Schedule of Asset Acquisition [Line Items]
Investment properties	$ 206,493
Intangible assets	21,584
Intangible liabilities	(6,215)
Net other assets and liabilities	738
Total fair value of assets acquired and liabilities assumed	222,600
2018 Acquisitions | Land
Schedule of Asset Acquisition [Line Items]
Investment properties	40,435
2018 Acquisitions | Building and other improvements
Schedule of Asset Acquisition [Line Items]
Investment properties	$ 166,058
2017 Acquisitions
Schedule of Asset Acquisition [Line Items]
Investment properties		$ 566,194
Intangible assets		69,306
Intangible liabilities		(19,099)
Net other assets and liabilities		17,024
Total fair value of assets acquired and liabilities assumed		633,425
2017 Acquisitions | Land
Schedule of Asset Acquisition [Line Items]
Investment properties		125,990
2017 Acquisitions | Building and other improvements
Schedule of Asset Acquisition [Line Items]
Investment properties		$ 440,204

Disposed Properties - Schedule

Disposed Properties - Schedule of Disposal Groups (Details) $ in Thousands	Jun. 26, 2018USD ($)	Mar. 21, 2018USD ($)	May 17, 2017USD ($)	Dec. 31, 2018USD ($)ft²	Dec. 31, 2017USD ($)ft²	Dec. 31, 2016USD ($)ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Disposition Price				$ 466,175	$ 244,066	$ 1,924,350
Gain (Loss) on Extinguishment of Debt				$ 9,103	$ 840	$ (10,498)
Retail
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				9,500,000	12,400,000	12,200,000
Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				3,481,000	1,558,000
Gross Disposition Price				$ 466,175	$ 190,566
Gain (Loss) on Sale and Transfer of Investment Properties, net				95,097	24,066
Gain (Loss) on Extinguishment of Debt				$ 9,157	$ 840
Sherman Town Center I & II | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				485,000
Gross Disposition Price				$ 63,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				12,382
Gain (Loss) on Extinguishment of Debt				$ 0
Grafton Commons | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				239,000
Gross Disposition Price				$ 33,500
Gain (Loss) on Sale and Transfer of Investment Properties, net				6,564
Gain (Loss) on Extinguishment of Debt				$ 0
Lakeport Commons | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				283,000
Gross Disposition Price				$ 31,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				(666)
Gain (Loss) on Extinguishment of Debt				$ 0
Stonecrest Marketplace | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Exchange
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				265,000
Gross Disposition Price				$ 0
Gain (Loss) on Sale and Transfer of Investment Properties, net		$ 1,777		1,777
Gain (Loss) on Extinguishment of Debt				$ 10,752
Carrying value, surrendered properties		$ 23,932
Northwest Marketplace | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Condemnation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				0
Gross Disposition Price				$ 0
Gain (Loss) on Sale and Transfer of Investment Properties, net				248
Gain (Loss) on Extinguishment of Debt				$ 0
Market at Morse/Hamilton | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				45,000
Gross Disposition Price				$ 10,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				1,592
Gain (Loss) on Extinguishment of Debt				$ 0
Siegen Plaza | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				156,000
Gross Disposition Price				$ 29,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				3,849
Gain (Loss) on Extinguishment of Debt				$ (54)
Tomball Town Center | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				67,000
Gross Disposition Price				$ 22,750
Gain (Loss) on Sale and Transfer of Investment Properties, net				7,184
Gain (Loss) on Extinguishment of Debt				$ 0
Bellerive Plaza | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Exchange
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				76,000
Gross Disposition Price				$ 0
Gain (Loss) on Sale and Transfer of Investment Properties, net	$ (22)			(22)
Gain (Loss) on Extinguishment of Debt				$ 1,694
Carrying value, surrendered properties	$ 4,771
Parkway Centre North | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				143,000
Gross Disposition Price				$ 23,700
Gain (Loss) on Sale and Transfer of Investment Properties, net				5,357
Gain (Loss) on Extinguishment of Debt				$ (1,695)
Tulsa Hills | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				473,000
Gross Disposition Price				$ 70,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				13,476
Gain (Loss) on Extinguishment of Debt				$ 0
McKinney Town Center | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				243,000
Gross Disposition Price				$ 51,000
Gain (Loss) on Sale and Transfer of Investment Properties, net				15,430
Gain (Loss) on Extinguishment of Debt				$ 0
Riverstone Shopping Center | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				273,000
Gross Disposition Price				$ 27,750
Gain (Loss) on Sale and Transfer of Investment Properties, net				(320)
Gain (Loss) on Extinguishment of Debt				$ (1,540)
Hiram Pavilion | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				363,000
Gross Disposition Price				$ 44,350
Gain (Loss) on Sale and Transfer of Investment Properties, net				22,124
Gain (Loss) on Extinguishment of Debt				$ 0
Poplin Place | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				228,000
Gross Disposition Price				$ 28,300
Gain (Loss) on Sale and Transfer of Investment Properties, net				2,841
Gain (Loss) on Extinguishment of Debt				$ 0
Walden Park | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				34,000
Gross Disposition Price				$ 5,325
Gain (Loss) on Sale and Transfer of Investment Properties, net				5
Gain (Loss) on Extinguishment of Debt				$ 0
Streets of Cranberry | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²				108,000
Gross Disposition Price				$ 26,500
Gain (Loss) on Sale and Transfer of Investment Properties, net				3,276
Gain (Loss) on Extinguishment of Debt				0
Additional Loan | Retail
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Extinguishment of Debt				$ (4)
Penn Park | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					242,000
Gross Disposition Price					$ 29,050
Gain (Loss) on Sale and Transfer of Investment Properties, net					1,021
Gain (Loss) on Extinguishment of Debt					$ 0
Intech Retail | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Exchange
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					0
Gross Disposition Price					$ 0
Gain (Loss) on Sale and Transfer of Investment Properties, net			$ (52)		(52)
Gain (Loss) on Extinguishment of Debt					$ 882
Carrying value, surrendered properties			$ 2,338
Sparks Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					336,000
Gross Disposition Price					$ 40,280
Gain (Loss) on Sale and Transfer of Investment Properties, net					10,559
Gain (Loss) on Extinguishment of Debt					$ 0
Lincoln Village | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					164,000
Gross Disposition Price					$ 30,000
Gain (Loss) on Sale and Transfer of Investment Properties, net					2,355
Gain (Loss) on Extinguishment of Debt					$ 0
Market at Westlake | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Condemnation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					0
Gross Disposition Price					$ 0
Gain (Loss) on Sale and Transfer of Investment Properties, net					473
Gain (Loss) on Extinguishment of Debt					$ 0
Pavilions at Hartman Heritage | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					223,000
Gross Disposition Price					$ 21,700
Gain (Loss) on Sale and Transfer of Investment Properties, net					(1,736)
Gain (Loss) on Extinguishment of Debt					$ 0
Legacy Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					134,000
Gross Disposition Price					$ 10,250
Gain (Loss) on Sale and Transfer of Investment Properties, net					(211)
Gain (Loss) on Extinguishment of Debt					$ (1)
Heritage Plaza | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					132,000
Gross Disposition Price					$ 21,350
Gain (Loss) on Sale and Transfer of Investment Properties, net					9,189
Gain (Loss) on Extinguishment of Debt					$ (41)
Crossroads at Chesapeake | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					0
Gross Disposition Price					$ 1,250
Gain (Loss) on Sale and Transfer of Investment Properties, net					834
Gain (Loss) on Extinguishment of Debt					$ 0
Scofield Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					0
Gross Disposition Price					$ 2,936
Gain (Loss) on Sale and Transfer of Investment Properties, net					2,247
Gain (Loss) on Extinguishment of Debt					$ 0
Dothan Plaza | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Square Feet | ft²					327,000
Gross Disposition Price					$ 33,750
Gain (Loss) on Sale and Transfer of Investment Properties, net					(613)
Gain (Loss) on Extinguishment of Debt					$ 0

Disposed Properties - Narrative

Disposed Properties - Narrative (Details) - USD ($)	Aug. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale and transfer of investment properties, net		$ 430,514,000	$ 233,686,000	$ 1,580,994,000
Gross Disposition Price		$ 466,175,000	244,066,000	1,924,350,000
Gain on sale of properties, net			$ 10,115,000	$ 236,256,000
Discontinued Operations, Disposed of by Sale | Worldgate Plaza
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Disposition Price	$ 53,500,000

Disposed Properties - Schedul_2

Disposed Properties - Schedule of Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Total income						$ 3,935	$ 92,329
Depreciation and amortization expense						1,205	32,667
Other expenses						2,308	36,487
Provision for asset impairment						0	106,514
Operating income (loss) from discontinued operations						422	(83,339)
Interest expense, income taxes, and other miscellaneous income						(6,696)	(17,983)
Equity in losses of unconsolidated entity						0	(19)
Gain on sale of investment in unconsolidated entity						0	1,434
Gain on sale of properties, net						10,115	236,256
Loss on extinguishment of debt						(2)	(2,826)
Net income from discontinued operations						3,839	133,523
Net income from discontinued operations	$ (4,474)	$ 9,722	$ (833)	$ (576)	$ 0	$ 3,839	$ 133,523
Weighted average number of common shares outstanding, basic and diluted (in shares)					761,139,011	773,445,341	854,638,497
Net income, per common share, from discontinued operations, basic and diluted (in dollars per share)					$ 0	$ 0	$ 0.15

Investment in Consolidated an_3

Investment in Consolidated and Unconsolidated Entities - Schedule of Consolidated Variable Interest Entities (Details) - River Oaks And Kyle Marketplace - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Total assets	$ 44,091	$ 184,505
Total liabilities	385	11,343
Net assets	43,706	173,162
Net investment properties
Variable Interest Entity [Line Items]
Total assets	39,634	165,875
Other assets
Variable Interest Entity [Line Items]
Total assets	4,457	18,630
Other liabilities
Variable Interest Entity [Line Items]
Total liabilities	$ 385	$ 11,343

Investment in Consolidated an_4

Investment in Consolidated and Unconsolidated Entities - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)property	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2015USD ($)
Variable Interest Entity [Line Items]
Investment in unconsolidated entities, impairment loss	$ 29,933,000	$ 0	$ 0
Investment in unconsolidated entities	$ 156,132,000	180,764,000
Realized gain (loss) on disposal			1,434,000
Number of retail properties impaired | property	3
Proceeds from sale and transfer of investment properties, net	$ 430,514,000	233,686,000	1,580,994,000
Provision for asset impairment	3,510,000	27,754,000	117,722,000
Unconsolidated Entity 1
Variable Interest Entity [Line Items]
Proceeds from equity method investment, dividends or distributions, return of capital		366,000
Investment in unconsolidated entities		0
Realized gain (loss) on disposal		0
IAGM Retail Fund I, LLC | Bryant Square
Variable Interest Entity [Line Items]
Proceeds from sale and transfer of investment properties, net	2,274,000
Provision for asset impairment	$ 2,020,000
IAGM Retail Fund I, LLC | Bryant Square | Retail
Variable Interest Entity [Line Items]
Number of retail properties impaired | property	2
Proceeds from sale and transfer of investment properties, net	$ 4,135,000
Unconsolidated Entities
Variable Interest Entity [Line Items]
Investment in unconsolidated entities, impairment loss	29,933,000	0	$ 0
Investment in unconsolidated entities	156,132,000	180,764,000
Unconsolidated Entities | Downtown Railyard Venture, LLC
Variable Interest Entity [Line Items]
Investment in unconsolidated entities, impairment loss	29,933,000
Investment in unconsolidated entities	30,049,000	57,183,000		$ 46,174,000
Unconsolidated Entities | IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Investment in unconsolidated entities, impairment loss	3,673,000
Investment in unconsolidated entities	$ 126,195,000	123,693,000
Number of retail properties impaired | property	3
PLAZA MIDTOWN Atlanta, GL
Variable Interest Entity [Line Items]
Acquisition date fair value		10,790,000
Land		1,963,000
Building and other improvements		$ 8,827,000

Investment in Consolidated an_5

Investment in Consolidated and Unconsolidated Entities - Schedule of Joint Ventures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2013USD ($)property	Dec. 31, 2018USD ($)	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2015USD ($)
Schedule of net equity investment and share of net income or loss
Investment in unconsolidated entities		$ 156,132		$ 180,764
Unconsolidated Entities
Schedule of net equity investment and share of net income or loss
Investment in unconsolidated entities		$ 156,132		180,764
Unconsolidated Entities | IAGM Retail Fund I, LLC
Schedule of net equity investment and share of net income or loss
Ownership %		55.00%
Investment in unconsolidated entities		$ 126,195		123,693
Number of contributed properties | property	14
Aggregate deferred gain	$ 15,625
Amortization period	30 years
Unconsolidated Entities | IAGM Retail Fund I, LLC | Accounting Standard Update 2017-05
Schedule of net equity investment and share of net income or loss
Aggregate deferred gain			$ 12,756
Unconsolidated Entities | Downtown Railyard Venture, LLC
Schedule of net equity investment and share of net income or loss
Ownership %		90.00%
Investment in unconsolidated entities		$ 30,049		57,183	$ 46,174
Debt instrument, face amount					$ 18,088
Stated interest rate (percent)					4.00%
Unconsolidated Entities | Other unconsolidated entities
Schedule of net equity investment and share of net income or loss
Investment in unconsolidated entities		$ (112)		$ (112)

Investment in Consolidated an_6

Investment in Consolidated and Unconsolidated Entities - Combined Financial Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Liabilities and equity:
Impairment of investment in unconsolidated entities	$ (29,933,000)	$ 0	$ 0
Carrying value of investments in unconsolidated entities	156,132,000	180,764,000
Statements of Operations:
Revenues	58,322,000	62,367,000	70,385,000
Expenses
Depreciation and amortization	21,001,000	26,860,000	27,209,000
Operating expenses, ground rent and general and administrative expenses	19,732,000	22,304,000	21,671,000
Provision for asset impairment	3,673,000	4,745,000	0
Total operating expenses	44,406,000	53,909,000	48,880,000
Operating income	13,916,000	8,458,000	21,505,000
Interest expense and loan cost amortization	(13,205,000)	(13,419,000)	(13,015,000)
(Loss) gain on sale of real estate	(4,123,000)	434,000	0
Loss on debt extinguishment	(20,000)	0	0
Net (loss) income	(3,432,000)	(4,527,000)	8,490,000
Company's share of:
Company's share of net (loss) income, net of excess basis depreciation of $0, $520, and $520, respectively	(1,870,000)	(1,930,000)	4,109,000
Distributions from unconsolidated entities in excess of the investments' carrying value	410,000	1,126,000	5,190,000
Impairment of investment in unconsolidated entities	(29,933,000)	0	0
Equity in (losses) earnings and (impairment), net, of unconsolidated entities	(31,393,000)	(804,000)	9,299,000
Unconsolidated Entities
Assets
Real estate assets, net of accumulated depreciation	494,583,000	586,671,000
Other assets	103,565,000	73,423,000
Total assets	598,148,000	660,094,000
Liabilities and equity:
Mortgage debt, net	272,629,000	311,574,000
Other liabilities	42,569,000	49,032,000
Equity	282,950,000	299,488,000
Total liabilities and equity	598,148,000	660,094,000
Company’s share of equity	185,814,000	193,572,000
Impairment of investment in unconsolidated entities	(29,933,000)	0	0
Cost of investments in excess of the Company's share of underlying net book value, net of accumulated amortization of $0 and $2,647, respectively.	251,000	(12,808,000)
Carrying value of investments in unconsolidated entities	156,132,000	180,764,000
Accumulated depreciation	0	2,647,000
Company's share of:
Impairment of investment in unconsolidated entities	(29,933,000)	0	0
Excess basis depreciation	$ 0	$ 520,000	$ 520,000

Investment in Consolidated an_7

Investment in Consolidated and Unconsolidated Entities - Maturity 3rd Party Mortgage Debt (Details) - IAGM Retail Fund I, LLC $ in Thousands	Nov. 02, 2018USD ($)	Oct. 05, 2018USD ($)property	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Schedule of Equity Method Investments [Line Items]
Unconsolidated entities third party mortgage debt				$ 275,308
Schedule of Debt Maturities of the Unconsolidated Entities
2,019				31,353
2,020				0
2,021				23,150
2,022				0
2,023				180,125
Thereafter				40,680
Total				$ 275,308
Mortgages
Schedule of Debt Maturities of the Unconsolidated Entities
Extension term on non-recourse mortgage loan			1 year
Loans payable			$ 15,103
Debt extinguished		$ 38,300
Repayments of mortgage payable		$ 3,830
Number of retail properties | property		6
Debt instrument, face amount	$ 5,205
Senior Secured Term Loan
Schedule of Debt Maturities of the Unconsolidated Entities
Debt instrument, face amount	$ 152,000
Debt instrument, extension fee	0.10%
Senior Secured Term Loan | London Interbank Offered Rate (LIBOR)
Schedule of Debt Maturities of the Unconsolidated Entities
Stated interest rate (percent)	1.55%

Investment in Marketable Secu_2

Investment in Marketable Securities - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment in Marketable Securities (Textual) [Abstract]
Investment in marketable securities	$ 0	$ 4,758
Impairment on securities included as a component of realized gain (loss)		4,482
Net accumulated other comprehensive income		275	$ 58,572
Gross unrealized losses		72	598
Gross unrealized losses on investments held for less than twelve months, fair value		3,276
Impairment charges on available for sale securities		0	1,327
Dividend income recognized	$ 181	$ 2,857	$ 10,490

Intangible Assets, Liabilitie_3

Intangible Assets, Liabilities, and Deferred Leasing Costs - Summary of Intangible Assets and Intangible Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Acquired in-place leases	$ 156,004	$ 226,515
Acquired above-market leases	22,353	29,670
Intangible assets	178,357	256,185
Accumulated amortization	(70,352)	(140,774)
Intangible assets, net	108,005	115,411
Accumulated amortization, acquired below-market leases	74,312	80,862
Accumulated amortization, acquired below-market leases	(27,327)	(27,330)
Intangible liabilities, net	46,985	53,532
Leasing costs	18,236	17,355
Accumulated amortization	(8,018)	(8,642)
Deferred leasing costs, net	10,218	8,713
Accumulated amortization, acquired in-place leases
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	(58,203)	(123,043)
Accumulated amortization, above-market leases
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (12,149)	$ (17,731)

Intangible Assets, Liabilitie_4

Intangible Assets, Liabilities, and Deferred Leasing Costs - Summary of Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 25,559	$ 25,633	$ 20,879
Amortization of deferred leasing costs (a)	2,036	1,806	1,703
Accumulated amortization, acquired in-place leases
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	22,523	22,580	18,298
Accumulated amortization, above-market leases
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	3,036	3,053	2,581
Below Market Leases Acquired
Finite-Lived Intangible Assets [Line Items]
Amortization of below-market leases	$ 8,570	$ 8,563	$ 6,676

Intangible Assets, Liabilitie_5

Intangible Assets, Liabilities, and Deferred Leasing Costs - Summary of Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amortization Income
2,019	$ 7,349
2,020	6,596
2,021	5,578
2,022	4,478
2,023	3,438
Thereafter	19,546
Intangible liabilities, net	46,985	$ 53,532
Accumulated amortization, acquired in-place leases
Amortization Expense
2,019	19,243
2,020	16,114
2,021	12,794
2,022	9,742
2,023	8,000
Thereafter	31,908
Total future amortization expense	97,801
Accumulated amortization, above-market leases
Amortization Expense
2,019	2,220
2,020	1,870
2,021	1,512
2,022	982
2,023	777
Thereafter	2,843
Total future amortization expense	10,204
Deferred leasing costs
Amortization Expense
2,019	2,475
2,020	1,724
2,021	1,581
2,022	1,369
2,023	966
Thereafter	2,103
Total future amortization expense	$ 10,218

Debt - Narrative (Details)

Debt - Narrative (Details)	Dec. 21, 2018USD ($)trancheoption	Jul. 12, 2018USD ($)	Feb. 03, 2015USD ($)option	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Nov. 05, 2015USD ($)
Mortgages Payable [Line Items]
Debt, net				$ 561,782,000	$ 667,861,000
Wells Fargo, Merrill Lynch, Pierce Fenner Smith, PNC Capital Markets Credit Facility
Mortgages Payable [Line Items]
Maximum borrowing capacity						$ 300,000,000
Maximum borrowing capacity with accordion feature						$ 600,000,000
Interest Rate Swap | Level 2
Mortgages Payable [Line Items]
Notional amount				150,000,000
Mortgages
Mortgages Payable [Line Items]
Long-term debt, net				$ 212,927,000	$ 369,476,000
Mortgages | Minimum
Mortgages Payable [Line Items]
Stated interest rate (percent)				3.49%	3.49%
Mortgages | Maximum
Mortgages Payable [Line Items]
Stated interest rate (percent)				5.49%	10.45%
Line of Credit | Term Loan
Mortgages Payable [Line Items]
Long-term debt, net				$ 348,855,000
Unsecured Debt | Term Loan
Mortgages Payable [Line Items]
Debt instrument, face amount	$ 400,000,000
Number of Tranches | tranche	2
Leverage ratio, fee percentage				0.15%
Unsecured Debt | Term Loan | Minimum
Mortgages Payable [Line Items]
Leverage ratio, fee percentage	0.15%
Unsecured Debt | Term Loan | Maximum
Mortgages Payable [Line Items]
Leverage ratio, fee percentage	0.25%
Unsecured Debt | Term Loan, Tranche One
Mortgages Payable [Line Items]
Debt instrument, face amount	$ 250,000,000
Debt instrument, term	5 years			5 years
Proceeds from borrowings	$ 226,000,000
Additional amount drawn	$ 26,000,000
Remaining borrowing capacity				$ 24,000,000
Unsecured Debt | Term Loan, Tranche One | London Interbank Offered Rate (LIBOR)
Mortgages Payable [Line Items]
Basis spread on variable rate	1.20%
Unsecured Debt | Term Loan, Tranche Two
Mortgages Payable [Line Items]
Debt instrument, face amount	$ 150,000,000
Debt instrument, term	5 years 6 months			5 years 6 months
Proceeds from borrowings	$ 126,000,000
Additional amount drawn	$ 26,000
Remaining borrowing capacity				$ 24,000,000
Unsecured Debt | Term Loan, Tranche Two | London Interbank Offered Rate (LIBOR)
Mortgages Payable [Line Items]
Basis spread on variable rate	1.20%
Revolving Credit Facility
Mortgages Payable [Line Items]
Additional amount drawn		$ 52,000
Pay off of outstanding unsecured revolving line of credit	$ 52,000,000
Revolving Credit Facility | KeyBanc Capital Markets and J.P. Morgan Securities LLC Amended and Restated
Mortgages Payable [Line Items]
Basis spread on variable rate			1.40%
Maximum borrowing capacity			$ 300,000,000
Maximum borrowing capacity with accordion feature			$ 600,000,000
Number of extension options | option			1
Extension option, period			12 months
Commitment fee percentage			0.15%
Revolving Credit Facility | Revolving Credit Facility, Amended and Restated
Mortgages Payable [Line Items]
Debt instrument, term	4 years
Leverage ratio, fee percentage				0.15%
Maximum borrowing capacity	$ 350,000,000
Remaining borrowing capacity				$ 350,000,000
Number of extension options | option	2
Extension option, period	6 months
Revolving Credit Facility | Revolving Credit Facility, Amended and Restated | London Interbank Offered Rate (LIBOR)
Mortgages Payable [Line Items]
Basis spread on variable rate				1.05%
Revolving Credit Facility | Revolving Credit Facility, Amended and Restated | Minimum
Mortgages Payable [Line Items]
Commitment fee percentage				0.15%
Revolving Credit Facility | Revolving Credit Facility, Amended and Restated | Maximum
Mortgages Payable [Line Items]
Commitment fee percentage				0.30%

Debt - Mortgages Payable (Detai

Debt - Mortgages Payable (Details) - Mortgages - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total	$ 213,925	$ 370,804
Premium, net of accumulated amortization	239	478
Discount, net of accumulated amortization	(158)	(195)
Debt issuance costs, net of accumulated amortization	(1,079)	(1,611)
Total debt, net	$ 212,927	$ 369,476
Weighted average interest rate (percent)	4.33%	5.13%
Minimum
Debt Instrument [Line Items]
Stated interest rate (percent)	3.49%	3.49%
Maximum
Debt Instrument [Line Items]
Stated interest rate (percent)	5.49%	10.45%

Debt - Mortgage Maturities (Det

Debt - Mortgage Maturities (Details) - Mortgages - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
2,019	$ 0
2,020	41,000
2,021	12,557
2,022	50,748
2,023	41,740
Thereafter	67,880
Total	$ 213,925	$ 370,804

Debt - Unsecured Term Loans (De

Debt - Unsecured Term Loans (Details) - USD ($)	Dec. 31, 2018	Dec. 21, 2018	Dec. 03, 2018	Nov. 05, 2015
Wells Fargo, Merrill Lynch, Pierce Fenner Smith, PNC Capital Markets Credit Facility
Debt Instrument [Line Items]
Issuance costs, net of accumulated amortization				$ (1,179,000)
$250.0 million 5 year - variable rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 250,000,000
Unsecured term loans	$ 50,000,000
Stated interest rate (percent)	3.5493%
$250.0 million 5 year - variable rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 250,000,000
Unsecured term loans	$ 26,000,000
Stated interest rate (percent)	3.6794%
$150.0 million 5.5 year - variable rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 150,000,000
Unsecured term loans	$ 100,000,000
Stated interest rate (percent)	3.5493%
$150.0 million 5.5 year - variable rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 150,000,000
Unsecured term loans	$ 26,000,000
Stated interest rate (percent)	3.6794%
Term Loan | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount		$ 400,000,000
Unsecured term loans	$ 352,000,000
Issuance costs, net of accumulated amortization	(3,145,000)	$ (1,966,000)
Term Loan | Line of Credit
Debt Instrument [Line Items]
Total debt, net	348,855,000
Interest Rate Swap One | $250.0 million 5 year - swapped to fixed rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	250,000,000
Unsecured term loans	$ 90,000,000
Stated interest rate (percent)	2.551%
Interest Rate Swap One | $250.0 million 5 year - variable rate | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, derivative			1.20%
Interest Rate Swap One | $250.0 million 5 year - variable rate | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, derivative		1.20%
Interest Rate Swap One | Term Loan | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, derivative	1.20%
Interest Rate Swap Two | $250.0 million 5 year - swapped to fixed rate | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 250,000,000
Unsecured term loans	$ 60,000,000
Stated interest rate (percent)	2.5525%
Interest Rate Swap Two | Term Loan | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, derivative	1.20%

Debt - Line of Credit (Details)

Debt - Line of Credit (Details) - Revolving Credit Facility - Wells Fargo, Merrill Lynch, Pierce Fenner Smith, PNC Capital Markets Credit Facility - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Line of Credit Facility [Line Items]
Long-term line of credit	$ 300,000,000
Issuance costs, net of accumulated amortization	(1,615,000)
Long-term Line of Credit, Net	298,385,000
5 Year - swapped to fixed rate | Interest Rate Swap One
Line of Credit Facility [Line Items]
Long-term line of credit	$ 90,000,000
Stated interest rate (percent)	2.651%
Notional amount		$ 90,000,000
5 Year - swapped to fixed rate | London Interbank Offered Rate (LIBOR) | Interest Rate Swap One
Line of Credit Facility [Line Items]
Basis spread on variable rate, derivative	1.30%
5 year - swapped to fixed rate | Interest Rate Swap Two
Line of Credit Facility [Line Items]
Long-term line of credit	$ 60,000,000
Stated interest rate (percent)	2.6525%
Notional amount		$ 60,000,000
5 year - swapped to fixed rate | London Interbank Offered Rate (LIBOR) | Interest Rate Swap Two
Line of Credit Facility [Line Items]
Basis spread on variable rate, derivative	1.30%
5 Year - variable rate
Line of Credit Facility [Line Items]
Long-term line of credit	$ 50,000,000
Stated interest rate (percent)	2.6607%
5 Year - variable rate | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate, debt instrument	1.30%
7 Year - variable rate
Line of Credit Facility [Line Items]
Long-term line of credit	$ 100,000,000
Stated interest rate (percent)	2.9607%
7 Year - variable rate | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate, debt instrument	1.60%

Debt - Effect of Derivative Fin

Debt - Effect of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain recognized in accumulated comprehensive income		$ 1,183	$ 623
Cash Flow Hedging | Interest expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated comprehensive income into net income		(423)	(1,295)
Effects of cash flow hedges		$ 30,155	$ 44,135
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain recognized in accumulated comprehensive income	$ 923
Interest Rate Swap | Interest expense, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated comprehensive income into net income	956
Effects of cash flow hedges	$ 24,943

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)property	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)property
Fair Value Measurements (Additional Textual) [Abstract]
Number of retail properties impaired | property	3
Provision for asset impairment	$ 3,510,000	$ 27,754,000	$ 11,208,000
Provision for asset impairment	3,510,000	27,754,000	117,722,000
Provision for asset impairment		0	106,514,000
Impairment of investment in unconsolidated entities	29,933,000	0	0
Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Impairment of investment in unconsolidated entities	29,933,000	0	0
Downtown Railyard Venture, LLC | Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Impairment of investment in unconsolidated entities	$ 29,933,000
Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment			29,931,000
Retail
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment		$ 27,754,000	$ 11,208,000
Minimum | Discontinued Operations
Fair Value Measurements (Additional Textual) [Abstract]
Fair value inputs, capitalization rate			6.75%
Minimum | Measurement Input, Discount Rate | Discontinued Operations
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0775
Maximum | Discontinued Operations
Fair Value Measurements (Additional Textual) [Abstract]
Fair value inputs, capitalization rate			10.00%
Maximum | Measurement Input, Discount Rate | Discontinued Operations
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.1525
Mortgages | Weighted Average Effective Market rate
Fair Value Measurements (Additional Textual) [Abstract]
Measurement input, debt	0.0438	0.0420
Line of Credit and Term Loan | Weighted Average Effective Market rate
Fair Value Measurements (Additional Textual) [Abstract]
Measurement input, debt	0.0363	0.0348
Fair Value, Measurements, Recurring | Level 3
Fair Value Measurements (Additional Textual) [Abstract]
Recurring fair value measurements	$ 0	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment	3,510,000	27,754,000	$ 11,208,000
Investment properties, discontinued operations, total impairment loss	0	0	106,514,000
Impairment of investment in unconsolidated entities	$ 29,933,000	$ 0	0
Fair Value, Measurements, Nonrecurring | Spin-Off of Highlands REIT Inc.
Fair Value Measurements (Additional Textual) [Abstract]
Investment properties, discontinued operations, total impairment loss			$ 76,583,000
Fair Value, Measurements, Nonrecurring | Minimum | Capitalization Rate | Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0675
Fair Value, Measurements, Nonrecurring | Minimum | Capitalization Rate | Real Estate | Downtown Railyard Venture, LLC | Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0500
Fair Value, Measurements, Nonrecurring | Minimum | Measurement Input, Discount Rate | Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0700
Fair Value, Measurements, Nonrecurring | Minimum | Measurement Input, Discount Rate | Real Estate | Downtown Railyard Venture, LLC | Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.1000
Fair Value, Measurements, Nonrecurring | Maximum | Capitalization Rate | Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0700
Fair Value, Measurements, Nonrecurring | Maximum | Capitalization Rate | Real Estate | Downtown Railyard Venture, LLC | Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0800
Fair Value, Measurements, Nonrecurring | Maximum | Measurement Input, Discount Rate | Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.0800
Fair Value, Measurements, Nonrecurring | Maximum | Measurement Input, Discount Rate | Real Estate | Downtown Railyard Venture, LLC | Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input			0.3500
Fair Value, Measurements, Nonrecurring | Real Estate
Fair Value Measurements (Additional Textual) [Abstract]
Discounted cash flow method, term		10 years	10 years
Fair Value, Measurements, Nonrecurring | Real Estate | Retail
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment, properties affected | property		6	3
Fair Value, Measurements, Nonrecurring | Real Estate | Minimum | Capitalization Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input		0.0700	0.0600
Fair Value, Measurements, Nonrecurring | Real Estate | Minimum | Measurement Input, Discount Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input		0.0800	0.0700
Fair Value, Measurements, Nonrecurring | Real Estate | Maximum | Capitalization Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input		0.0800	0.0700
Fair Value, Measurements, Nonrecurring | Real Estate | Maximum | Measurement Input, Discount Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment Property, Measurement Input		0.0900	0.0800

Fair Value Measurements - Recur

Fair Value Measurements - Recurring Measurements (Details) - Fair Value, Measurements, Recurring - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Level 1
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		$ 4,431,000
Real estate related bonds		0
Derivative interest rate swaps	$ 0	0
Total assets	0	4,431,000
Level 2
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Real estate related bonds		327,000
Derivative interest rate swaps	1,637,000	1,670,000
Total assets	1,637,000	1,997,000
Level 3
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Real estate related bonds		0
Derivative interest rate swaps	0	0
Total assets	$ 0	$ 0

Fair Value Measurements - Non-R

Fair Value Measurements - Non-Recurring Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value
Investment in unconsolidated entities	$ 156,132	$ 180,764
Impairment Loss
Investment properties, continuing operations, total impairment loss	3,510	27,754	$ 11,208
Investment in unconsolidated entities, impairment loss	29,933	0	0
Fair Value, Measurements, Nonrecurring
Impairment Loss
Investment properties, continuing operations, total impairment loss	3,510	27,754	11,208
Investment properties, discontinued operations, total impairment loss	0	0	106,514
Investment in unconsolidated entities, impairment loss	29,933	0	0
Total Impairment Losses (Gain)	33,443	27,754	117,722
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value
Investment properties, continuing operations	64,075	105,900	66,323
Investment properties, discontinued operations	0	0	584,358
Investment in unconsolidated entities	$ 30,049	$ 0	$ 0

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Not Measure at Fair Value (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit and term loan, estimated fair value		$ 300,000
Carrying Value | Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, fair value disclosure	$ 352,000
Carrying Value | Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, fair value disclosure	213,925	370,804
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of credit and term loan, estimated fair value		299,770
Estimated Fair Value | Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, fair value disclosure		352,006
Estimated Fair Value | Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, fair value disclosure	$ 212,572	$ 372,962

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Income Tax Expense (Benefit) [Abstract]
Current Federal	$ (169)	$ 781	$ 130
Current State	199	543	71
Current Total	30	1,324	201
Deferred Income Tax Expense (Benefit) [Abstract]
Deferred Federal	0	0	0
Deferred State	0	0	0
Deferred Total	0	0	0
Total federal income tax expense (benefit), continuing operations	(169)	781	130
Total state and local income tax expense (benefit), continuing operations	199	543	71
Total income tax provision from continuing operations	30	1,324	201
Federal income tax expense (benefit), discontinued operations	0	(3)	(1)
State and local income tax expense (benefit), discontinued operations	0	(5)	268
Total income tax provision from discontinued operations	$ 0	$ (8)	$ 267

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Gross [Abstract]
Basis difference on investment in unconsolidated entities	$ 27,351	$ 27,916
Total deferred tax assets	27,351	27,916
Less: Valuation allowance	(27,351)	(27,916)
Net deferred tax assets	0	0
Deferred tax liabilities	$ 0	$ 0

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Real estate investment trust required distribution (percent)	90.00%
Valuation allowance	$ 27,351,000	$ 27,916,000
Deferred tax assets	0
Unrecognized tax benefits	$ 0

Income Taxes - Common Distribut

Income Taxes - Common Distributions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common Distributions Paid [Abstract]
Ordinary income	$ 0.028	$ 0	$ 0.080
Capital gain	0	0	0.240
Return of capital	0.043	0.069	0.150
Total distributions per share	$ 0.071	$ 0.069	$ 0.470

Earnings Per Share and Equity_3

Earnings Per Share and Equity Transactions - Reconciliation of Amounts Used in Calculating Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Income (Loss) Attributable to Parent [Abstract]
Net income from continuing operations					$ 8,285	$ 12,243	$ 34,753	$ 2,673	$ 83,849	$ 57,954	$ 119,199
Earnings allocated to unvested restricted shares									(95)	(15)	(10)
Net income from continuing operations attributable to common shareholders									83,754	57,939	119,189
Net income from discontinued operations					$ (4,474)	$ 9,722	$ (833)	$ (576)	$ 0	$ 3,839	$ 133,523
Denominator:
Weighted average number of common shares outstanding, basic and diluted (in shares)									761,139,011	773,445,341	854,638,497
Effect of unvested restricted shares (in shares)									926,463	1,155,138	62,258
Weighted average number of common shares outstanding - diluted (in shares)									762,065,474	774,600,479	854,700,755
Basic and diluted income per common share:
Net income from continuing operations allocated to common shareholders per share (in usd per share):									$ 0.11	$ 0.07	$ 0.14
Net income from discontinued operations allocated to common shareholders per share (in usd per share):									0	0	0.15
Net income per common share, basic and diluted (in dollars per share)	$ 0.03	$ 0.01	$ 0.03	$ 0.04	$ 0	$ 0.03	$ 0.04	$ 0	$ 0.11	$ 0.07	$ 0.29

Earnings Per Share and Equity_4

Earnings Per Share and Equity Transactions - Narrative (Details) - USD ($)	Aug. 15, 2018	Dec. 01, 2016	Dec. 01, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 27, 2016
Tender Offer Event [Line Items]
Common stock, par value (usd per share)				$ 0.001	$ 0.001
Cost of stock repurchased	$ 97,775,000
Repurchase of common stock	98,491,000			$ 98,491,000		$ 241,016,000
Refund received of excess funds associated with 2016 tender offer				$ 0	$ 1,929,000	$ 0
Common Stock
Tender Offer Event [Line Items]
Repurchase of common stock (shares)				46,559,289		89,502,449
Repurchase of common stock				$ 45,000		$ 89,000
Tender Offer Event, Shares
Tender Offer Event [Line Items]
Common stock, par value (usd per share)							$ 0.001
Repurchase of common stock (shares)		89,502,449
Percentage of outstanding stock		10.40%
Tender offer purchase price			$ 200,000,000
Allowed percentage of additional shares accepted for repurchase without amendment of offer (percent)			2.00%
Increase tender offer (shares)			14,186,716
Refund received of excess funds associated with 2016 tender offer			$ 37,700,000
Share price (usd per share)		$ 2.66	$ 2.66
Tender offer purchase price, excluding fees and expenses		$ 238,077,000
Dutch Auction
Tender Offer Event [Line Items]
Authorized repurchase amount	$ 75,000,000
Common stock, par value (usd per share)	$ 0.001
Outstanding shares, percent	2.00%
Increase in shares authorized to be repurchased (in shares)	10,706,774
Increase in authorized amount	$ 22,500,000
Purchase price (usd per share)	$ 2.10
Dutch Auction | Common Stock
Tender Offer Event [Line Items]
Repurchase of common stock (shares)	46,559,289
Percentage of outstanding stock	6.00%

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 4,503
Allocated share-based compensation expense	$ 4,330	$ 5,782	$ 3,737
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested restricted stock (shares)	1,548,150	1,535,505	1,646,523	951,555
2014 Student Housing Plan | During the year ended December 31, 2014 | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized			$ 2,246	$ 1,796	$ 833
2014 Student Housing Plan | Plan approved during 2014 | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized			$ 313
2015 Incentive Award Plan | 2015 Incentive Award Plan approved on June 19, 2015 | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)	30,000,000
Number of shares available for grant (shares)	23,626,050
Shares Vesting in 2017 | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested restricted stock (shares)	1,062,563
Shares Vesting in 2018 | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested restricted stock (shares)	485,587

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock Units (RSUs) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding unvested restricted stock units at beginning of year (shares)	1,535,505	1,646,523	951,555
Restricted stock units granted (shares)	1,950,307	2,019,078	2,410,341
Restricted stock units vested (shares)	(1,349,852)	(1,750,773)	(1,096,480)
Restricted stock units forfeited (shares)	(587,810)	(379,323)	(618,893)
Outstanding unvested restricted stock units at end of year (shares)	1,548,150	1,535,505	1,646,523
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date, beginning of year (in dollars per share)	$ 3.19	$ 3.29	$ 4
Weighted average price at grant date, restricted stock units granted (in dollars per share)	3.14	3.29	3.14
Weighted average price at grant date, restricted stock units vested (in dollars per share)	3.20	3.38	3.48
Weighted average price at grant date, restricted stock units forfeited (in dollars per share)	3.19	3.25	3.47
Weighted average grant date, end of year (in dollars per share)	$ 3.18	$ 3.19	$ 3.29

Commitments and Contingencies -

Commitments and Contingencies - Legacy Corner Apartments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Legacy Corner Apartments Litigation
Loss Contingencies [Line Items]
Loss contingency accrual, payments	$ 553

Commitments and Contingencies_2

Commitments and Contingencies - University House Communities Group, Inc., Indemnity Claims (Details)	Dec. 31, 2018USD ($)
University House Communities Group, Inc
Loss Contingencies [Line Items]
Loss contingency, range of possible loss, portion not accrued	$ 5,000,000

Commitments and Contingencies_3

Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Non-cancelable operating lease, rent expense	$ 1,114,000	$ 1,411,000	$ 1,415,000
Capital lease assets	2,097,000
Capital lease assets, accumulated amortization	104
Interest expense associated with leases	104,000
Operating Leases
2,019	717,000
2,020	611,000
2,021	494,000
2,022	466,000
2,023	479,000
Thereafter	1,041,000
Total	3,808,000
Capital Leases
2,019	532,000
2,020	532,000
2,021	519,000
2,022	317,000
2,023	40,000
Thereafter	0
Total	1,940,000
Less: Amount representing interest	(151,000)
Present value of net minimum lease payments	$ 1,789,000

Subsequent Events - Narrative (

Subsequent Events - Narrative (Details) - Subsequent Event - Commons at University Place Raleigh-Cary, NC MSA $ in Thousands	Jan. 31, 2019USD ($)ft²
Subsequent Event [Line Items]
Square Feet | ft²	92,100
Gross Acquisition Price | $	$ 23,300

Quarterly Supplemental Financ_3

Quarterly Supplemental Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Supplemental Financial Information [Abstract]
Total income	$ 56,491	$ 60,493	$ 61,774	$ 63,916	$ 64,521	$ 62,849	$ 62,152	$ 62,287	$ 242,674	$ 251,809	$ 242,693
Net income from continuing operations					8,285	12,243	34,753	2,673	83,849	57,954	119,199
Net income from discontinued operations					(4,474)	9,722	(833)	(576)	0	3,839	133,523
Net income	$ 17,507	$ 8,947	$ 23,163	$ 34,232	$ 3,811	$ 21,965	$ 33,920	$ 2,097	$ 83,849	$ 61,793	$ 252,722
Net income (loss), per common share, basic and diluted (in dollars per share)	$ 0.03	$ 0.01	$ 0.03	$ 0.04	$ 0	$ 0.03	$ 0.04	$ 0	$ 0.11	$ 0.07	$ 0.29
Weighted average number of common shares outstanding, basic and diluted (in shares)	727,904,818	768,385,770	774,391,881	774,311,254	773,562,942	773,517,492	773,381,165	773,316,262

Schedule III - Real Estate An_2

Schedule III - Real Estate And Accumulated Depreciation Property - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Real Estate and Accumulated Depreciation [Line Items]
Total gross amount	$ 2,229,495	$ 2,516,085	$ 2,180,252	$ 2,259,631
Accumulated depreciation	286,330	$ 348,337	$ 351,389	$ 394,904
Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	213,925
Initial cost of land	547,084
Initial cost of buildings and improvements	1,554,225
Adjustments to land basis	11,733
Adjustment to basis	116,453
Gross amount of land and improvements	558,817
Gross amount of buildings and improvements	1,670,678
Total gross amount	2,229,495
Accumulated depreciation	286,330
Retail | BEAR CREEK VILLAGE CENTER Wildomar, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	13,020
Initial cost of land	3,523
Initial cost of buildings and improvements	12,384
Adjustments to land basis	0
Adjustment to basis	245
Gross amount of land and improvements	3,523
Gross amount of buildings and improvements	12,629
Total gross amount	16,152
Accumulated depreciation	4,580
Retail | BENT TREE PLAZA Raleigh, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,983
Initial cost of buildings and improvements	7,093
Adjustments to land basis	0
Adjustment to basis	1,646
Gross amount of land and improvements	1,983
Gross amount of buildings and improvements	8,739
Total gross amount	10,722
Accumulated depreciation	2,809
Retail | BOYNTON COMMONS Miami, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	11,400
Initial cost of buildings and improvements	17,315
Adjustments to land basis	0
Adjustment to basis	2,213
Gross amount of land and improvements	11,400
Gross amount of buildings and improvements	19,528
Total gross amount	30,928
Accumulated depreciation	5,827
Retail | BROOKS CORNER San Antonio, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	12,557
Initial cost of land	10,600
Initial cost of buildings and improvements	13,648
Adjustments to land basis	0
Adjustment to basis	3,469
Gross amount of land and improvements	10,600
Gross amount of buildings and improvements	17,117
Total gross amount	27,717
Accumulated depreciation	7,751
Retail | BUCKHEAD CROSSING Atlanta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,565
Initial cost of buildings and improvements	27,104
Adjustments to land basis	0
Adjustment to basis	1,013
Gross amount of land and improvements	7,565
Gross amount of buildings and improvements	28,117
Total gross amount	35,682
Accumulated depreciation	9,933
Retail | CAMPUS MARKETPLACE San Marcos, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	41,000
Initial cost of land	26,928
Initial cost of buildings and improvements	43,445
Adjustments to land basis	55
Adjustment to basis	(90)
Gross amount of land and improvements	26,983
Gross amount of buildings and improvements	43,355
Total gross amount	70,338
Accumulated depreciation	3,109
Retail | CARY PARK TOWN CENTER Cary, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,555
Initial cost of buildings and improvements	17,280
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	5,555
Gross amount of buildings and improvements	17,280
Total gross amount	22,835
Accumulated depreciation	899
Retail | CENTERPLACE OF GREELEY Greeley, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	14,087
Initial cost of land	3,904
Initial cost of buildings and improvements	14,715
Adjustments to land basis	0
Adjustment to basis	655
Gross amount of land and improvements	3,904
Gross amount of buildings and improvements	15,370
Total gross amount	19,274
Accumulated depreciation	5,717
Retail | CHESAPEAKE COMMONS Chesapeake, VA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,669
Initial cost of buildings and improvements	10,839
Adjustments to land basis	0
Adjustment to basis	62
Gross amount of land and improvements	2,669
Gross amount of buildings and improvements	10,901
Total gross amount	13,570
Accumulated depreciation	4,705
Retail | CHEYENNE MEADOWS Colorado Springs, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,023
Initial cost of buildings and improvements	6,991
Adjustments to land basis	0
Adjustment to basis	399
Gross amount of land and improvements	2,023
Gross amount of buildings and improvements	7,390
Total gross amount	9,413
Accumulated depreciation	2,776
Retail | COWETA CROSSING Newnan, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,143
Initial cost of buildings and improvements	4,590
Adjustments to land basis	0
Adjustment to basis	16
Gross amount of land and improvements	1,143
Gross amount of buildings and improvements	4,606
Total gross amount	5,749
Accumulated depreciation	1,713
Retail | CROSSROADS AT CHESAPEAKE SQUARE Chesapeake, VA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,970
Initial cost of buildings and improvements	13,732
Adjustments to land basis	(296)
Adjustment to basis	2,033
Gross amount of land and improvements	3,674
Gross amount of buildings and improvements	15,765
Total gross amount	19,439
Accumulated depreciation	7,017
Retail | CUSTER CREEK VILLAGE Richardson, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	4,750
Initial cost of buildings and improvements	12,245
Adjustments to land basis	0
Adjustment to basis	355
Gross amount of land and improvements	4,750
Gross amount of buildings and improvements	12,600
Total gross amount	17,350
Accumulated depreciation	5,187
Retail | ELDRIDGE TOWN CENTER Houston, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,200
Initial cost of buildings and improvements	16,663
Adjustments to land basis	0
Adjustment to basis	771
Gross amount of land and improvements	3,200
Gross amount of buildings and improvements	17,434
Total gross amount	20,634
Accumulated depreciation	8,362
Retail | GARDEN VILLAGE San Pedro, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,188
Initial cost of buildings and improvements	16,522
Adjustments to land basis	0
Adjustment to basis	173
Gross amount of land and improvements	3,188
Gross amount of buildings and improvements	16,695
Total gross amount	19,883
Accumulated depreciation	5,794
Retail | GATEWAY MARKET CENTER Tampa, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	13,600
Initial cost of buildings and improvements	4,992
Adjustments to land basis	0
Adjustment to basis	1,082
Gross amount of land and improvements	13,600
Gross amount of buildings and improvements	6,074
Total gross amount	19,674
Accumulated depreciation	2,257
Retail | KENNESAW MARKETPLACE Kennesaw, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,587
Initial cost of buildings and improvements	51,860
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	12,587
Gross amount of buildings and improvements	51,860
Total gross amount	64,447
Accumulated depreciation	1,009
Retail | KYLE MARKETPLACE Kyle, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,076
Initial cost of buildings and improvements	48,220
Adjustments to land basis	0
Adjustment to basis	308
Gross amount of land and improvements	6,076
Gross amount of buildings and improvements	48,528
Total gross amount	54,604
Accumulated depreciation	2,156
Retail | MARKET AT WESTLAKE Westlake Hills, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,200
Initial cost of buildings and improvements	6,274
Adjustments to land basis	(64)
Adjustment to basis	80
Gross amount of land and improvements	1,136
Gross amount of buildings and improvements	6,354
Total gross amount	7,490
Accumulated depreciation	2,660
Retail | NORTHCROSS COMMONS Charlotte, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,591
Initial cost of buildings and improvements	21,303
Adjustments to land basis	0
Adjustment to basis	341
Gross amount of land and improvements	7,591
Gross amount of buildings and improvements	21,644
Total gross amount	29,235
Accumulated depreciation	1,705
Retail | NORTHWEST MARKETPLACE Houston, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,870
Initial cost of buildings and improvements	30,340
Adjustments to land basis	(31)
Adjustment to basis	1,119
Gross amount of land and improvements	3,839
Gross amount of buildings and improvements	31,459
Total gross amount	35,298
Accumulated depreciation	12,742
Retail | OLD GROVE MARKETPLACE Oceanside, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,545
Initial cost of buildings and improvements	8,902
Adjustments to land basis	0
Adjustment to basis	46
Gross amount of land and improvements	12,545
Gross amount of buildings and improvements	8,948
Total gross amount	21,493
Accumulated depreciation	807
Retail | PARAISO PARC AND WESTFORK PLAZA Pembroke Pines, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	28,267
Initial cost of buildings and improvements	124,019
Adjustments to land basis	0
Adjustment to basis	4,862
Gross amount of land and improvements	28,267
Gross amount of buildings and improvements	128,881
Total gross amount	157,148
Accumulated depreciation	8,120
Retail | PAVILION AT LAQUINTA LaQuinta, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	23,641
Initial cost of land	15,200
Initial cost of buildings and improvements	20,947
Adjustments to land basis	0
Adjustment to basis	941
Gross amount of land and improvements	15,200
Gross amount of buildings and improvements	21,888
Total gross amount	37,088
Accumulated depreciation	7,637
Retail | PEACHLAND PROMENADE Port Charlotte, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,742
Initial cost of buildings and improvements	6,502
Adjustments to land basis	4,158
Adjustment to basis	7,754
Gross amount of land and improvements	5,900
Gross amount of buildings and improvements	14,256
Total gross amount	20,156
Accumulated depreciation	360
Retail | PGA PLAZA Palm Beach Gardens, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	10,414
Initial cost of buildings and improvements	75,730
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	10,414
Gross amount of buildings and improvements	75,730
Total gross amount	86,144
Accumulated depreciation	1,499
Retail | PLANTATION GROVE Ocoee, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	7,300
Initial cost of land	3,705
Initial cost of buildings and improvements	6,300
Adjustments to land basis	0
Adjustment to basis	568
Gross amount of land and improvements	3,705
Gross amount of buildings and improvements	6,868
Total gross amount	10,573
Accumulated depreciation	1,217
Retail | PLAZA MIDTOWN Atlanta, GL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,295
Initial cost of buildings and improvements	23,946
Adjustments to land basis	0
Adjustment to basis	24
Gross amount of land and improvements	5,295
Gross amount of buildings and improvements	23,970
Total gross amount	29,265
Accumulated depreciation	1,067
Retail | PROMENADE FULTONDALE Fultondale, AL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,540
Initial cost of buildings and improvements	22,414
Adjustments to land basis	(1,022)
Adjustment to basis	1,783
Gross amount of land and improvements	4,518
Gross amount of buildings and improvements	24,197
Total gross amount	28,715
Accumulated depreciation	7,939
Retail | QUEBEC SQUARE Denver, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	23,550
Initial cost of land	9,579
Initial cost of buildings and improvements	40,086
Adjustments to land basis	0
Adjustment to basis	2,432
Gross amount of land and improvements	9,579
Gross amount of buildings and improvements	42,518
Total gross amount	52,097
Accumulated depreciation	5,898
Retail | RENAISSANCE CENTER Durham, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	15,155
Initial cost of land	26,713
Initial cost of buildings and improvements	96,141
Adjustments to land basis	0
Adjustment to basis	3,722
Gross amount of land and improvements	26,713
Gross amount of buildings and improvements	99,863
Total gross amount	126,576
Accumulated depreciation	10,115
Retail | RIO PINOR PLAZA Orlando, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,171
Initial cost of buildings and improvements	26,903
Adjustments to land basis	0
Adjustment to basis	133
Gross amount of land and improvements	5,171
Gross amount of buildings and improvements	27,036
Total gross amount	32,207
Accumulated depreciation	3,077
Retail | RIVER OAKS SHOPPING CENTER Valencia, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	24,598
Initial cost of buildings and improvements	88,418
Adjustments to land basis	0
Adjustment to basis	(112)
Gross amount of land and improvements	24,598
Gross amount of buildings and improvements	88,306
Total gross amount	112,904
Accumulated depreciation	4,037
Retail | RIVERVIEW VILLAGE Arlington, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	6,000
Initial cost of buildings and improvements	9,649
Adjustments to land basis	0
Adjustment to basis	777
Gross amount of land and improvements	6,000
Gross amount of buildings and improvements	10,426
Total gross amount	16,426
Accumulated depreciation	4,343
Retail | RIVERWALK MARKET Flower Mound, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,931
Initial cost of buildings and improvements	23,922
Adjustments to land basis	0
Adjustment to basis	1
Gross amount of land and improvements	5,931
Gross amount of buildings and improvements	23,923
Total gross amount	29,854
Accumulated depreciation	1,897
Retail | ROSE CREEK Woodstock, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,443
Initial cost of buildings and improvements	5,630
Adjustments to land basis	0
Adjustment to basis	509
Gross amount of land and improvements	1,443
Gross amount of buildings and improvements	6,139
Total gross amount	7,582
Accumulated depreciation	2,118
Retail | SANDY PLAINS CENTRE Marietta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,366
Initial cost of buildings and improvements	27,270
Adjustments to land basis	0
Adjustment to basis	0
Gross amount of land and improvements	12,366
Gross amount of buildings and improvements	27,270
Total gross amount	39,636
Accumulated depreciation	0
Retail | SARASOTA PAVILION Sarasota, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,000
Initial cost of buildings and improvements	25,823
Adjustments to land basis	0
Adjustment to basis	4,221
Gross amount of land and improvements	12,000
Gross amount of buildings and improvements	30,044
Total gross amount	42,044
Accumulated depreciation	8,711
Retail | SCOFIELD CROSSING Austin, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	8,100
Initial cost of buildings and improvements	4,992
Adjustments to land basis	(576)
Adjustment to basis	317
Gross amount of land and improvements	7,524
Gross amount of buildings and improvements	5,309
Total gross amount	12,833
Accumulated depreciation	2,200
Retail | SHOPS AT THE GALLERIA Austin, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	52,104
Initial cost of buildings and improvements	75,651
Adjustments to land basis	0
Adjustment to basis	577
Gross amount of land and improvements	52,104
Gross amount of buildings and improvements	76,228
Total gross amount	128,332
Accumulated depreciation	7,659
Retail | SILVERLAKE Erlanger, KY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,031
Initial cost of buildings and improvements	6,975
Adjustments to land basis	0
Adjustment to basis	(10)
Gross amount of land and improvements	2,031
Gross amount of buildings and improvements	6,965
Total gross amount	8,996
Accumulated depreciation	2,704
Retail | SONTERRA VILLAGE San Antonio, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,150
Initial cost of buildings and improvements	15,095
Adjustments to land basis	0
Adjustment to basis	325
Gross amount of land and improvements	5,150
Gross amount of buildings and improvements	15,420
Total gross amount	20,570
Accumulated depreciation	1,634
Retail | STEVENSON RANCH Stevenson Ranch, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	29,519
Initial cost of buildings and improvements	39,190
Adjustments to land basis	0
Adjustment to basis	20
Gross amount of land and improvements	29,519
Gross amount of buildings and improvements	39,210
Total gross amount	68,729
Accumulated depreciation	3,840
Retail | SUNCREST VILLAGE Orlando, FL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	8,400
Initial cost of land	6,742
Initial cost of buildings and improvements	6,403
Adjustments to land basis	0
Adjustment to basis	614
Gross amount of land and improvements	6,742
Gross amount of buildings and improvements	7,017
Total gross amount	13,759
Accumulated depreciation	1,256
Retail | SYCAMORE COMMONS Matthews, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,500
Initial cost of buildings and improvements	31,265
Adjustments to land basis	0
Adjustment to basis	1,782
Gross amount of land and improvements	12,500
Gross amount of buildings and improvements	33,047
Total gross amount	45,547
Accumulated depreciation	11,717
Retail | THE CENTER AT HUGH HOWELL Tucker, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	2,250
Initial cost of buildings and improvements	11,091
Adjustments to land basis	0
Adjustment to basis	806
Gross amount of land and improvements	2,250
Gross amount of buildings and improvements	11,897
Total gross amount	14,147
Accumulated depreciation	5,223
Retail | THE PARKE Cedar Park, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	9,271
Initial cost of buildings and improvements	83,078
Adjustments to land basis	0
Adjustment to basis	311
Gross amount of land and improvements	9,271
Gross amount of buildings and improvements	83,389
Total gross amount	92,660
Accumulated depreciation	3,989
Retail | THE POINTE AT CREEDMOOR Raleigh, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,507
Initial cost of buildings and improvements	5,454
Adjustments to land basis	0
Adjustment to basis	6
Gross amount of land and improvements	7,507
Gross amount of buildings and improvements	5,460
Total gross amount	12,967
Accumulated depreciation	551
Retail | THE SHOPS AT TOWN CENTER Germantown, MD
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	19,996
Initial cost of buildings and improvements	29,776
Adjustments to land basis	0
Adjustment to basis	114
Gross amount of land and improvements	19,996
Gross amount of buildings and improvements	29,890
Total gross amount	49,886
Accumulated depreciation	1,916
Retail | THE SHOPS AT WALNUT CREEK Westminster, CO
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	28,630
Initial cost of land	10,132
Initial cost of buildings and improvements	44,089
Adjustments to land basis	0
Adjustment to basis	1,309
Gross amount of land and improvements	10,132
Gross amount of buildings and improvements	45,398
Total gross amount	55,530
Accumulated depreciation	6,034
Retail | THOMAS CROSSROADS Newnan, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,622
Initial cost of buildings and improvements	8,322
Adjustments to land basis	0
Adjustment to basis	1,246
Gross amount of land and improvements	1,622
Gross amount of buildings and improvements	9,568
Total gross amount	11,190
Accumulated depreciation	3,224
Retail | UNIVERSITY OAKS SHOPPING CENTER Round Rock, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	26,585
Initial cost of land	7,250
Initial cost of buildings and improvements	25,326
Adjustments to land basis	0
Adjustment to basis	8,098
Gross amount of land and improvements	7,250
Gross amount of buildings and improvements	33,424
Total gross amount	40,674
Accumulated depreciation	10,204
Retail | WEST CREEK SHOPPING CENTER Austin, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	5,151
Initial cost of buildings and improvements	8,659
Adjustments to land basis	0
Adjustment to basis	37
Gross amount of land and improvements	5,151
Gross amount of buildings and improvements	8,696
Total gross amount	13,847
Accumulated depreciation	1,700
Retail | WESTPARK SHOPPING CENTER Glen Allen, VA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	7,462
Initial cost of buildings and improvements	24,164
Adjustments to land basis	0
Adjustment to basis	(5,568)
Gross amount of land and improvements	7,462
Gross amount of buildings and improvements	18,596
Total gross amount	26,058
Accumulated depreciation	2,428
Retail | WHITE OAK CROSSING Garner, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	19,000
Initial cost of buildings and improvements	70,275
Adjustments to land basis	0
Adjustment to basis	2,123
Gross amount of land and improvements	19,000
Gross amount of buildings and improvements	72,398
Total gross amount	91,398
Accumulated depreciation	18,746
Retail | WINDERMERE VILLAGE Houston, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	1,220
Initial cost of buildings and improvements	6,331
Adjustments to land basis	0
Adjustment to basis	1,267
Gross amount of land and improvements	1,220
Gross amount of buildings and improvements	7,598
Total gross amount	8,818
Accumulated depreciation	3,548
Retail | WINDWARD COMMONS Alpharetta, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	12,823
Initial cost of buildings and improvements	13,779
Adjustments to land basis	0
Adjustment to basis	299
Gross amount of land and improvements	12,823
Gross amount of buildings and improvements	14,078
Total gross amount	26,901
Accumulated depreciation	1,192
Retail | WOODBRIDGE Wylie, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	0
Adjustments to land basis	9,509
Adjustment to basis	41,617
Gross amount of land and improvements	9,509
Gross amount of buildings and improvements	41,617
Total gross amount	51,126
Accumulated depreciation	12,932
Retail | WOODLAKE CROSSING San Antonio, TX
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	3,420
Initial cost of buildings and improvements	14,153
Adjustments to land basis	0
Adjustment to basis	3,508
Gross amount of land and improvements	3,420
Gross amount of buildings and improvements	17,661
Total gross amount	21,081
Accumulated depreciation	5,858
Retail | Total Corporate Assets
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	0
Initial cost of land	0
Initial cost of buildings and improvements	0
Adjustments to land basis	0
Adjustment to basis	14,104
Gross amount of land and improvements	0
Gross amount of buildings and improvements	14,104
Total gross amount	14,104
Accumulated depreciation	$ 10,225

Schedule III - Real Estate An_3

Schedule III - Real Estate And Accumulated Depreciation Property - Real Estate and Accumulated Depreciation Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Construction in progress	$ 12,788	$ 4,975
Aggregate cost of real estate owned	2,449,497
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of period	2,516,085	2,180,252	$ 2,259,631
Acquisitions and capital improvements	237,439	598,843	497,646
Disposals and write-offs	(524,029)	(263,010)	(534,458)
Properties classified as discontinued operations	0	0	(42,567)
Balance at end of period	2,229,495	2,516,085	2,180,252
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of period	348,337	351,389	394,904
Depreciation expense, continuing operations	73,021	70,959	63,684
Depreciation expense, properties classified as discontinued operations	0	974	27,397
Accumulated depreciation expense, properties classified as discontinued operations	0	0	(2,601)
Disposal and write-offs	(135,028)	(74,985)	(131,995)
Balance at end of period	$ 286,330	$ 348,337	$ 351,389
Building and other improvements
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Estimated lives used to compute depreciation	30 years
Furniture, fixtures and equipment | Minimum
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Estimated lives used to compute depreciation	5 years
Furniture, fixtures and equipment | Maximum
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Estimated lives used to compute depreciation	15 years

Uncategorized Items - ivtp-2018

Label	Element	Value
Recognition of Partially Deferred Gains on Property Sales	ivtp_RecognitionofPartiallyDeferredGainsonPropertySales	$ 0
Recognition of Partially Deferred Gains on Property Sales	ivtp_RecognitionofPartiallyDeferredGainsonPropertySales	0
Recognition of Partially Deferred Gains on Property Sales	ivtp_RecognitionofPartiallyDeferredGainsonPropertySales	12,756,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1,918,478,000
Business Combination, Contingent Consideration, Liability	us-gaap_BusinessCombinationContingentConsiderationLiability	1,322,000
Business Combination, Contingent Consideration, Liability	us-gaap_BusinessCombinationContingentConsiderationLiability	1,593,000
Business Combination, Contingent Consideration, Liability	us-gaap_BusinessCombinationContingentConsiderationLiability	1,679,000
Disposition, Accounts Payable, Acquired Lease Intangibles, and Other Liabilities	ivtp_DispositionAccountsPayableAcquiredLeaseIntangiblesandOtherLiabilities	(34,125,000)
Disposition, Accounts Payable, Acquired Lease Intangibles, and Other Liabilities	ivtp_DispositionAccountsPayableAcquiredLeaseIntangiblesandOtherLiabilities	(5,047,000)
Disposition, Accounts Payable, Acquired Lease Intangibles, and Other Liabilities	ivtp_DispositionAccountsPayableAcquiredLeaseIntangiblesandOtherLiabilities	(13,035,000)
Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 773,000
Shares, Issued	us-gaap_SharesIssued	774,293,197
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 5,681,912,000
Accumulated Distributions in Excess of Net Income [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	(3,765,877,000)
AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1,670,000
Accounting Standards Update 2016-01 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	275,000	[1]
Accounting Standards Update 2016-01 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(275,000)	[1]
Accounting Standards Update 2017-05 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	12,756,000	[1]
Accounting Standards Update 2017-05 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 12,756,000	[1]
[1]	See Note 2. Basis of Presentation and Summary of Significant Accounting Policies.