Tier Reit (TIER) 10-Q 8 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	TIER REIT INC
Entity Central Index Key	1,176,373
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		47,746,054
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Real estate
Land	$ 159,736	$ 179,989
Land held for development	45,059	45,059
Buildings and improvements, net	1,108,255	1,348,200
Real estate under development	7,725	0
Total real estate	1,320,775	1,573,248
Cash and cash equivalents	78,599	12,248
Restricted cash	10,778	10,712
Accounts receivable, net	66,328	76,228
Prepaid expenses and other assets	5,356	6,712
Investments in unconsolidated entities	77,606	88,998
Deferred financing fees, net	2,999	3,111
Lease intangibles, net	68,338	83,548
Other intangible assets, net	9,887	10,086
Total assets	1,640,666	1,864,891
Liabilities
Notes payable, net	901,295	1,071,571
Accounts payable and accrued liabilities	61,721	71,597
Payables to related parties	0	292
Acquired below-market leases, net	8,961	11,934
Distributions payable	8,601	8,596
Other liabilities	35,170	23,082
Total liabilities	1,015,748	1,187,072
Commitments and contingencies
Series A Convertible Preferred Stock	0	2,700
Equity
Preferred stock, $.0001 par value per share; 17,500,000 and 17,490,000 shares authorized at June 30, 2016, and December 31, 2015, respectively, none outstanding	0	0
Convertible stock, $.0001 par value per share; 1,000 shares authorized, none outstanding	0	0
Common stock, $.0001 par value per share; 382,499,000 shares authorized, 47,412,705 and 47,362,372 shares issued and outstanding at June 30, 2016, and December 31, 2015, respectively	5	5
Additional paid-in capital	2,604,614	2,600,193
Cumulative distributions and net loss attributable to common stockholders	(1,961,968)	(1,922,721)
Accumulated other comprehensive loss	(19,262)	(3,860)
Stockholders’ equity	623,389	673,617
Noncontrolling interests	1,529	1,502
Total equity	624,918	675,119
Total liabilities and equity	$ 1,640,666	$ 1,864,891

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (shares)	17,500,000	17,490,000
Preferred stock, shares outstanding (shares)	0	0
Convertible stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible stock, shares authorized (shares)	1,000	1,000
Convertible stock, shares outstanding (shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (shares)	382,499,000	382,499,000
Common stock, shares issued (shares)	47,412,705	47,362,372
Common stock, shares outstanding (shares)	47,412,705	47,362,372

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Rental revenue	$ 64,267	$ 70,038	$ 132,745	$ 145,857
Expenses
Property operating expenses	19,805	20,877	40,290	46,056
Interest expense	13,447	15,460	25,687	31,982
Real estate taxes	9,429	10,198	20,493	21,842
Property management fees	226	2,105	510	4,437
Asset impairment losses	0	0	4,826	132
General and administrative	5,820	19,470	12,324	25,884
Depreciation and amortization	30,797	31,081	62,841	61,103
Total expenses	79,524	99,191	166,971	191,436
Interest and other income	344	141	618	286
Loss on early extinguishment of debt	0	(21,412)	0	(21,448)
Loss from continuing operations before income taxes, equity in operations of investments, and gain on sale of assets	(14,913)	(50,424)	(33,608)	(66,741)
Provision for income taxes	(281)	(1,338)	(463)	(1,262)
Equity in operations of investments	823	69	1,238	312
Loss from continuing operations before gain on sale of assets	(14,371)	(51,693)	(32,833)	(67,691)
Discontinued operations
Income (loss) from discontinued operations	0	(121)	0	1,369
Gain on sale of discontinued operations	0	6,077	0	14,683
Discontinued operations	0	5,956	0	16,052
Gain on sale of assets	5,010	44,564	10,749	44,564
Net loss	(9,361)	(1,173)	(22,084)	(7,075)
Net loss attributable to noncontrolling interests
Noncontrolling interests in continuing operations	9	33	25	60
Noncontrolling interests in discontinued operations	0	(11)	0	(28)
Net loss attributable to common stockholders	$ (9,352)	$ (1,151)	$ (22,059)	$ (7,043)
Basic and diluted weighted average common shares outstanding (in shares)	47,405,767	49,893,330	47,397,679	49,892,390
Basic and diluted income (loss) per common share:
Continuing operations (in dollars per share)	$ (0.20)	$ (0.14)	$ (0.47)	$ (0.46)
Discontinued operations (in dollars per share)	0	0.12	0	0.32
Basic and diluted loss per common share (in dollars per share)	(0.20)	(0.02)	(0.47)	(0.14)
Distributions declared per common share (in dollars per share)	$ 0.18	$ 0.18	$ 0.36	$ 0.18
Net income (loss) attributable to common stockholders:
Continuing operations	$ (9,352)	$ (7,096)	$ (22,059)	$ (23,067)
Discontinued operations	0	5,945	0	16,024
Net loss attributable to common stockholders	(9,352)	(1,151)	(22,059)	(7,043)
Comprehensive income (loss):
Net loss	(9,361)	(1,173)	(22,084)	(7,075)
Other comprehensive income (loss): unrealized income (loss) on interest rate derivatives	(2,532)	6,146	(15,412)	1,590
Comprehensive income (loss)	(11,893)	4,973	(37,496)	(5,485)
Comprehensive loss attributable to noncontrolling interests	11	11	35	29
Comprehensive income (loss) attributable to common stockholders	$ (11,882)	$ 4,984	$ (37,461)	$ (5,456)

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Changes in Equity (unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Cumulative Distributions and Net Loss Attributable to Common Stockholders	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at Dec. 31, 2014	$ 783,534	$ 5	$ 2,645,927	$ (1,862,555)	$ (788)	$ 945
Balance (in shares) at Dec. 31, 2014		49,877
Increase (Decrease) in Equity
Net loss	(7,075)			(7,043)		(32)
Unrealized loss on interest rate derivatives	1,590				1,587	3
Share-based compensation, net (in shares)		26
Share based compensation, net	827		740			87
Redemption of common stock	(842)		(842)
Redemption of common stock (in shares)		(31)
Contributions by noncontrolling interests	1,325					1,325
Distributions declared, common stock ($0.18 per share)	(9,011)			(9,011)
Distributions declared, Series A Convertible Preferred Stock ($0.18 per share)	(2)			(2)
Distributions declared, noncontrolling interests	(15)					(15)
Balance at Jun. 30, 2015	770,331	$ 5	2,645,825	(1,878,611)	799	2,313
Balance (in shares) at Jun. 30, 2015		49,872
Balance at Dec. 31, 2014	783,534	$ 5	2,645,927	(1,862,555)	(788)	945
Balance (in shares) at Dec. 31, 2014		49,877
Increase (Decrease) in Equity
Distributions declared, common stock ($0.18 per share)	(26,126)
Distributions declared, Series A Convertible Preferred Stock ($0.18 per share)	(6)
Distributions declared, noncontrolling interests	(48)
Balance at Dec. 31, 2015	675,119	$ 5	2,600,193	(1,922,721)	(3,860)	1,502
Balance (in shares) at Dec. 31, 2015		47,362
Increase (Decrease) in Equity
Net loss	(22,084)			(22,059)		(25)
Unrealized loss on interest rate derivatives	(15,412)				(15,402)	(10)
Share-based compensation, net (in shares)		51
Share based compensation, net	1,796		1,721			75
Distributions declared, common stock ($0.18 per share)	(17,188)			(17,188)
Distributions declared, Series A Convertible Preferred Stock ($0.18 per share)	0
Distributions declared, noncontrolling interests	(13)					(13)
Cancellation of Series A Convertible Preferred Stock	2,700		2,700
Balance at Jun. 30, 2016	$ 624,918	$ 5	$ 2,604,614	$ (1,961,968)	$ (19,262)	$ 1,529
Balance (in shares) at Jun. 30, 2016		47,413

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Changes in Equity (unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Distributions declared per common share (in dollars per share)	$ 0.36	$ 0.18
Distributions declared per preferred share (in dollars per share)	$ 0	$ 0.18

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net loss	$ (22,084)	$ (7,075)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Asset impairment losses	4,826	132
Gain on sale of assets	(10,749)	(44,564)
Gain on sale of discontinued operations	0	(14,683)
Loss on early extinguishment of debt	0	546
Loss on derivatives	1,941	0
Amortization of restricted shares and units	2,049	1,099
Depreciation and amortization	62,841	61,103
Amortization of lease intangibles	(1,385)	(478)
Amortization of above- and below-market rent	(2,463)	(2,522)
Amortization of deferred financing and mark-to-market costs	1,523	1,763
Equity in operations of investments	(1,238)	(312)
Ownership portion of management and construction management fees from unconsolidated companies	276	221
Distributions from investments	300	569
Change in accounts receivable	(2,177)	(3,613)
Change in prepaid expenses and other assets	501	818
Change in lease commissions	(7,185)	(10,320)
Change in other lease intangibles	(810)	(376)
Change in accounts payable and accrued liabilities	(7,526)	(17,679)
Change in other liabilities	(1,717)	3,198
Change in payables to related parties	0	(1,092)
Cash provided by (used in) operating activities	16,923	(33,265)
Cash flows from investing activities
Escrow deposits	0	(20,000)
Return of investments	15,630	631
Purchase of ground lease	0	(7,200)
Purchases of real estate	0	(6,781)
Investments in unconsolidated entities	(3,576)	(7,818)
Capital expenditures for real estate	(20,833)	(39,477)
Capital expenditures for real estate under development	(2,909)	(2,555)
Proceeds from sale of discontinued operations	0	59,713
Proceeds from sale of assets	250,269	392,648
Change in restricted cash	(16)	5,704
Cash provided by investing activities	238,565	374,865
Cash flows from financing activities
Financing costs	(868)	(5,094)
Proceeds from notes payable	107,000	576,990
Payments on notes payable	(277,820)	(790,981)
Payments on capital lease obligations	0	(12)
Redemptions of common stock	0	(842)
Transfer of common stock	(253)	(270)
Distributions paid to common stockholders	(17,172)	0
Distributions paid to noncontrolling interests	(24)	0
Contributions from noncontrolling interests	0	325
Cash used in financing activities	(189,137)	(219,884)
Net change in cash and cash equivalents	66,351	121,716
Cash and cash equivalents at beginning of period	12,248	31,442
Cash and cash equivalents at end of period	$ 78,599	$ 153,158

Business

Business	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business Organization TIER REIT, Inc. is a self-managed, Dallas-based real estate investment trust focused on delivering outsized stockholder return through stock price appreciation and dividend growth while offering unparalleled tenant service. As used herein, “TIER REIT,” the “Company,” “we,” “us,” or “our” refers to TIER REIT, Inc. and its subsidiaries unless the context otherwise requires. TIER REIT’s investment strategy is to acquire, develop, and operate a portfolio of best-in-class office properties in select U.S. markets that consistently lead the nation in both population and office-using employment growth. Within these markets, we target TIER 1 submarkets, which are primarily urban and amenity-rich locations. TIER REIT was incorporated in June 2002 as a Maryland corporation and has elected to be treated, and currently qualifies, as a real estate investment trust, or REIT, for federal income tax purposes. As of June 30, 2016 , we owned interests in 32 operating office properties, two non-operating properties, and one development property, located in 13 markets throughout the United States. Substantially all of our business is conducted through Tier Operating Partnership LP (“Tier OP”), a Texas limited partnership. Our wholly-owned subsidiary, Tier GP, Inc., a Delaware corporation, is the sole general partner of Tier OP. Our direct and indirect wholly-owned subsidiaries, Tier Business Trust, a Maryland business trust, and Tier Partners, LLC, a Delaware limited liability company, are limited partners that together with Tier GP, Inc. own all of Tier OP.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Interim Unaudited Financial Information The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2015, which was filed with the Securities and Exchange Commission (“SEC”) on February 16, 2016. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted from this report on Form 10-Q pursuant to the rules and regulations of the SEC. The results for the interim periods shown in this report are not necessarily indicative of future financial results. The accompanying condensed consolidated balance sheets as of June 30, 2016 , and December 31, 2015 , and condensed consolidated statements of operations and comprehensive income (loss), changes in equity, and cash flows for the periods ended June 30, 2016 and 2015 , have not been audited by our independent registered public accounting firm. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments necessary to present fairly our financial position as of June 30, 2016 , and December 31, 2015 , and our results of operations and our cash flows for the periods ended June 30, 2016 and 2015 . These adjustments are of a normal recurring nature. We have evaluated subsequent events for recognition or disclosure in our condensed consolidated financial statements. Reclassification Certain amounts previously reflected in the prior year condensed consolidated balance sheet and condensed consolidated statement of cash flows have been reclassified to conform to our 2016 presentation. The December 31, 2015 , condensed consolidated balance sheet reflects the single line “accounts payable and accrued liabilities” that was previously presented on two lines “accounts payable” (approximately $0.8 million ) and “accrued liabilities” (approximately $70.8 million ). In addition, the June 30, 2015, condensed consolidated statement of cash flows reflects within the operating section the single line “change in accounts payable and accrued liabilities” that was previously presented on two lines “change in accounts payable” (approximately $0.1 million ) and “change in accrued liabilities” (approximately $17.5 million ). These reclassifications had no effect on the previously reported total liabilities or cash used in operating activities. Summary of Significant Accounting Policies Described below are certain of our significant accounting policies. The disclosures regarding several of the policies have been condensed or omitted in accordance with interim reporting regulations specified by Form 10-Q. Please see our consolidated financial statements and notes thereto included in Annual Report on Form 10-K for a complete listing of all of our significant accounting policies. Principles of Consolidation and Basis of Presentation Our condensed consolidated financial statements include our accounts, the accounts of variable interest entities (“VIEs”), if any, in which we are the primary beneficiary, and the accounts of other subsidiaries over which we have control. VIEs, as defined by GAAP, are generally entities that lack sufficient equity to finance their activities without additional financial support from other parties or whose equity holders lack adequate decision making ability. Interests in entities acquired are evaluated based on applicable GAAP guidance which requires the consolidation of VIEs in which we are deemed to be the primary beneficiary. We adopted new accounting guidance on January 1, 2016, and certain of our entities were determined to be VIEs under the new guidance. While this determination under the new guidance did not impact the conclusions regarding consolidation of these entities, we have included additional disclosures relating to these entities. The determination of the primary beneficiary requires management to make significant estimates and judgments about our rights, obligations, and economic interests in such entities as well as the same of the other owners. For entities in which we have less than a controlling financial interest or entities with respect to which we are not deemed to be the primary beneficiary, the entities are accounted for using the equity method of accounting. If the interest is in an entity that is determined not to be a VIE, then the entity is evaluated for consolidation based on legal form, economic substance, and the extent to which we have control and/or substantive participating rights under the respective ownership agreement. All inter-company transactions, balances, and profits have been eliminated in consolidation. Real Estate As of June 30, 2016 , and December 31, 2015 , the cost basis and accumulated depreciation and amortization related to our consolidated depreciable real estate properties and related lease intangibles were as follows (in thousands): Lease Intangibles Assets Liabilities Acquired Above-Market Leases Acquired Below-Market Leases Buildings and Improvements Other Lease Intangibles as of June 30, 2016 Cost $ 1,643,191 $ 138,703 $ 5,052 $ (44,122 ) Less: accumulated depreciation and amortization (534,936 ) (71,501 ) (3,916 ) 35,161 Net $ 1,108,255 $ 67,202 $ 1,136 $ (8,961 ) Lease Intangibles Assets Liabilities Acquired Above-Market Leases Acquired Below-Market Leases Buildings and Improvements Other Lease Intangibles as of December 31, 2015 Cost $ 1,914,664 $ 164,636 $ 5,383 $ (52,744 ) Less: accumulated depreciation and amortization (566,464 ) (82,476 ) (3,995 ) 40,810 Net $ 1,348,200 $ 82,160 $ 1,388 $ (11,934 ) We amortize the value of in-place leases, in-place tenant improvements, and in-place leasing commissions to expense over the initial term of the respective leases. The tenant relationship values are amortized to expense over the tenants’ respective initial lease terms and any anticipated renewal periods, but in no event does the amortization period for intangible assets or liabilities exceed the remaining depreciable life of the building. Should a tenant terminate its lease, the unamortized portion of the acquired lease intangibles related to that tenant would be charged to expense. The estimated remaining average useful lives for acquired lease intangibles range from an ending date of July 2016 to an ending date of March 2024. Anticipated amortization associated with acquired lease intangibles for each of the following five years is as follows (in thousands): July 2016 - December 2016 $ 1,822 2017 $ 1,926 2018 $ 1,108 2019 $ 1,002 2020 $ 1,092 Impairment of Real Estate-Related Assets For our consolidated real estate assets, we monitor events and changes in circumstances indicating that the carrying amounts of the real estate assets may not be recoverable. When such events or changes in circumstances are present, we assess potential impairment by comparing estimated future undiscounted cash flows expected to be generated over the life of the asset including its eventual disposition, to the carrying amount of the asset. In the event that the carrying amount exceeds the estimated future undiscounted cash flows and also exceeds the fair value of the asset, we recognize an impairment loss to adjust the carrying amount of the asset to its estimated fair value. Our process to estimate the fair value of an asset involves using bona fide purchase offers or the expected sales price of an executed sales agreement, which would be considered Level 1 or Level 2 assumptions within the fair value hierarchy. To the extent that this type of third party information is unavailable, we estimate projected cash flows and a risk-adjusted rate of return that we believe would be used by a third party market participant in estimating the fair value of an asset. This is considered a Level 3 assumption within the fair value hierarchy. These projected cash flows are prepared internally by the Company’s asset management professionals and are updated quarterly to reflect in-place and projected leasing activity, market revenue and expense growth rates, market capitalization rates, discount rates, and changes in economic and other relevant conditions. The Company’s Chief Financial Officer, Chief Accounting Officer, and Managing Director - Asset Management review these projected cash flows to assure that the valuation is prepared using reasonable inputs and assumptions which are consistent with market data or with assumptions that would be used by a third party market participant and assume the highest and best use of the real estate investment. For the six months ended June 30, 2016 and 2015 , we recorded non-cash impairment charges totaling approximately $4.8 million and $0.1 million , respectively, related to the impairment of consolidated real estate assets. The impairment losses recorded in 2016 relate to an asset assessed for impairment due to a change in management’s estimate of the intended hold period. The impairment loss recorded in 2015 related to final estimated closing costs incurred in connection with the disposition of a property that was impaired in 2014. For our unconsolidated real estate assets, at each reporting date we compare the estimated fair value of our investment to the carrying amount. An impairment charge is recorded to the extent the fair value of our investment is less than the carrying amount and the decline in value is determined to be other than a temporary decline. We had no impairment charges related to our investments in unconsolidated entities for the six months ended June 30, 2016 and 2015 . In evaluating our investments for impairment, management makes several estimates and assumptions, including, but not limited to, the projected date of disposition (the intended hold period) and sales price for each property, the estimated future cash flows of each property during our estimated ownership period, and for unconsolidated investments, the estimated future distributions from the investment. A change in these estimates and assumptions could result in understating or overstating the carrying amount of our investments which could be material to our financial statements. We undergo continuous evaluations of property level performance, credit market conditions, and financing options. If our assumptions regarding the cash flows expected to result from the use and eventual disposition of our properties decrease or our expected hold periods decrease, we may incur future impairment charges on our real estate-related assets. In addition, we may incur impairment charges on assets classified as held for sale in the future if the carrying amount of the asset upon classification as held for sale exceeds the estimated fair value, less costs to sell. Accounts Receivable, net The following is a summary of our accounts receivable as of June 30, 2016 , and December 31, 2015 (in thousands): June 30, December 31, Straight-line rental revenue receivable $ 63,951 $ 73,420 Tenant receivables 4,977 5,972 Non-tenant receivables 582 1,549 Allowance for doubtful accounts (3,182 ) (4,713 ) Total $ 66,328 $ 76,228 Our allowance for doubtful accounts is an estimate based on management’s evaluation of accounts where it has determined that a tenant may not meet its financial obligations. In these situations, management uses its judgment, based on the facts and circumstances, and records a reserve for that tenant against amounts due to reduce the receivable to an amount it believes is collectible. These reserves are reevaluated and adjusted as additional information becomes available. Investments in Unconsolidated Entities Investments in unconsolidated entities consist of our noncontrolling interests in properties. We account for these investments using the equity method of accounting in accordance with GAAP. We use the equity method of accounting when we have significant influence, but not control, of the decision-making involved in the operating and financial decisions of these investments and thereby have some responsibility to create a return on our investment. The equity method of accounting requires these investments to be initially recorded at cost and subsequently increased (decreased) for our share of net income (loss), including eliminations for our share of inter-company transactions, and increased (decreased) for contributions (distributions). To the extent that we contribute assets to an unconsolidated entity, our investment in the unconsolidated entity is recorded at our cost basis in the assets that were contributed to the entity. To the extent that our cost basis is different than the basis reflected at the entity level, the basis difference is generally amortized over the life of the related asset and included in our share of equity in operations of investments. For unconsolidated investments that have properties under development, we capitalize interest expense to our investment basis using our weighted average interest rate of consolidated debt. Capitalization begins when we are engaged in the activities necessary to get the property ready for its intended use. We cease capitalization when the development is completed and ready for its intended use or if the intended use changes such that capitalization is no longer appropriate. For the six months ended June 30, 2016 , we capitalized interest expense of approximately $0.3 million for an unconsolidated entity with property under development, which is included in our investments from unconsolidated entities on our condensed consolidated balance sheet. For the six months ended June 30, 2015 , we had no capitalized interest expense associated with unconsolidated entities. Other Intangible Assets, net Other intangible assets consist of below-market ground leases on properties where a third party owns and has leased the underlying land to us. As of June 30, 2016 , and December 31, 2015 , the cost basis and accumulated amortization related to our consolidated other intangible assets were as follows (in thousands): June 30, December 31, Cost $ 11,177 $ 11,177 Less: accumulated amortization (1,290 ) (1,091 ) Net $ 9,887 $ 10,086 Revenue Recognition We recognize rental income generated from all leases of consolidated real estate assets on a straight-line basis over the terms of the respective leases, including the effect of rent holidays, if any. Each of the amounts presented below include rental revenue amounts recognized in discontinued operations. The total net increase to rental revenue due to straight-line rent adjustments for the three months ended June 30, 2016 and 2015 , was approximately $1.3 million and $4.3 million , respectively. The total net increase to rental revenue due to straight-line rent adjustments for the six months ended June 30, 2016 and 2015 , was approximately $3.8 million and $7.1 million , respectively. When a tenant exceeds its tenant improvement allowance, this amount is reimbursed to us and recorded as a deferred rent liability, which is recognized as rental revenue over the life of the lease. The total net increase to rental revenue due to this deferred rent for the three months ended June 30, 2016 and 2015 , was approximately $0.9 million and $0.6 million , respectively. The total net increase to rental revenue due to this deferred rent for the six months ended June 30, 2016 and 2015 , was approximately $1.9 million and $1.0 million , respectively. Our rental revenue also includes amortization of acquired above- and below-market leases. The total net increase to rental revenue due to the amortization of acquired above- and below-market leases for the three months ended June 30, 2016 and 2015 , was approximately $1.1 million and $1.3 million , respectively. The total net increase to rental revenue due to the amortization of acquired above- and below-market leases for the six months ended June 30, 2016 and 2015 , was approximately $2.5 million and $2.5 million , respectively. Revenues relating to lease termination fees are recognized on a straight-line basis amortized from the time that a tenant’s right to occupy the leased space is modified through the end of the revised lease term. For the three months ended June 30, 2016 and 2015 , we recognized lease termination fees of approximately $0.7 million and $0.1 million , respectively. For the six months ended June 30, 2016 and 2015 , we recognized lease termination fees of approximately $1.3 million and $0.7 million , respectively.

New Accounting Pronouncements

New Accounting Pronouncements	6 Months Ended
	Jun. 30, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Newly Adopted Accounting Pronouncements In June 2014, the Financial Accounting Standards Board (“FASB”) issued an update that clarifies that entities should treat performance targets that can be met after the requisite service period of a share-based payment award as performance conditions that affect vesting. The compensation expense related to such awards will be delayed until it becomes probable that the performance target will be met. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2015, with early adoption permitted, and may be applied either prospectively or retrospectively. The adoption of this guidance on January 1, 2016, did not have a material impact on our financial statements. In January 2015, the FASB issued guidance simplifying income statement presentation by eliminating the concept of extraordinary items. An entity will no longer be allowed to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations if an event or transaction is unusual in nature and occurs infrequently. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2015, with early adoption permitted and may be applied either prospectively or retrospectively. The adoption of this guidance on January 1, 2016, did not have a material impact on our financial statements. In February 2015, the FASB issued updated guidance related to accounting for consolidation of certain legal entities. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2015, with early adoption permitted. Under the updated guidance, companies are required to evaluate whether they should consolidate certain legal entities under a revised consolidation model. All legal entities are subject to reevaluation under the revised consolidation model that modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. A full or modified retrospective method of adoption is allowed. We adopted this guidance using the modified retrospective method on January 1, 2016, which did not have a material impact on our financial statements, but additional disclosures are required and have been included in these notes to condensed consolidated financial statements related to certain of our entities that were determined to be a VIE. In April 2015, the FASB issued guidance related to accounting for debt issuance costs. The guidance simplifies presentation by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability, consistent with the presentation of debt discounts or premiums. In August 2015, the FASB further clarified this guidance to state that an entity may elect to continue to present debt issuance costs related to a line-of-credit arrangement as an asset, regardless of whether or not any outstanding borrowings exist on the line-of-credit. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2015. The adoption and retrospective application of this guidance on January 1, 2016, changed the classification of certain deferred financing fees on our balance sheet, but it did not otherwise have an impact on our financial statements. As of December 31, 2015, approximately $8.9 million in net deferred financing costs were reclassified from deferred financing fees and netted against our notes payable. As of December 31, 2015, approximately $3.1 million in net deferred financing fees associated with the revolving line of credit remained as an asset on the balance sheet. New Accounting Pronouncements to be Adopted In May 2014, the FASB issued guidance to clarify the principles for recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2017, with early adoption permitted only as of annual reporting periods beginning after December 15, 2016. The guidance permits two implementation approaches, one requiring retrospective application of the new standard with restatement of prior years and one requiring prospective application of the new standard with disclosure of results under old standards. We are currently evaluating the impact this guidance will have on our financial statements when adopted. In August 2014, the FASB issued guidance regarding management’s responsibility in evaluating whether there is a substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016. We do not believe the adoption of this guidance will have a material impact on our disclosures. In February 2016, the FASB issued updated guidance which sets out revised principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The guidance requires lessees to recognize assets and liabilities for operating leases with lease terms greater than twelve months on the balance sheet. The guidance further modifies lessors’ classification criteria for leases and the accounting for sales-type and direct financing leases. New disclosures regarding the amount, timing, and uncertainty of cash flows arising from leases are also required. The guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2018, with early adoption permitted and is required to be adopted using the modified retrospective approach. We are currently evaluating the impact this guidance will have on our financial statements when adopted. In March 2016, the FASB issued guidance which will affect accounting for certain aspects of share-based payments for employees. The guidance requires income statement recognition of income tax effects of the awards when the awards vest or are settled. The guidance also changes the employers’ accounting for forfeitures as well as for an employee’s use of shares to satisfy their income tax withholding obligations. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016, with early adoption permitted. We are currently evaluating the impact this guidance will have on our financial statements when adopted. In March 2016, the FASB issued amended guidance which simplifies the accounting for equity method investments by removing the requirement that an entity retroactively adopt the equity method of accounting if an investment qualifies for use of the equity method as a result of an increase in the level of ownership or degree of influence. The amendment requires that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016, with early adoption permitted. We are currently evaluating the impact this guidance will have on our financial statements when adopted.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value, as defined by GAAP, is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the fair value hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the fair value hierarchy) has been established. Assets and Liabilities Measured at Fair Value on a Recurring Basis Derivative financial instruments We use derivative financial instruments, such as interest rate swaps, to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis of the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. We incorporate credit valuation adjustments (“CVAs”) to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the CVAs associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, we have assessed the significance of the impact of the CVAs on the overall valuation of our derivative positions and have determined that they are not significant. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Unrealized gains or losses on derivatives are recorded in accumulated other comprehensive income (loss) (“OCI”) within equity at each measurement date. Our derivative financial instruments are included in “other liabilities” on our condensed consolidated balance sheets. The following table sets forth our financial liabilities measured at fair value on a recurring basis, which equals book value, by level within the fair value hierarchy as of June 30, 2016 , and December 31, 2015 (in thousands). Basis of Fair Value Measurements Quoted Prices In Active Markets for Identical Items (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Description June 30, 2016 Derivative financial instruments: Liabilities $ (21,219 ) $ — $ (21,219 ) $ — December 31, 2015 Derivative financial instruments: Liabilities $ (3,866 ) $ — $ (3,866 ) $ — Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Impairment of Real Estate Related Assets We have recorded non-cash impairment charges related to a reduction in the fair value of certain of our assets. The inputs used to calculate the fair value of these assets included projected cash flows and a risk-adjusted rate of return that we estimated would be used by a market participant in valuing these assets or by obtaining third party broker valuation estimates, bona fide purchase offers, or the expected sales price of an executed sales agreement. During the six months ended June 30, 2016 , we recorded impairment losses of approximately $4.8 million for a property assessed for impairment due to changes in management’s estimate of the intended hold period. During the year ended December 31, 2015 , we recorded impairment losses of approximately $0.1 million for final estimated closing costs incurred in connection with the disposition of a property which was impaired at December 31, 2014, and sold in 2015. The following table summarizes those assets which were measured at fair value and impaired during 2016 and 2015 (in thousands): Basis of Fair Value Measurements Description Fair Value of Assets at Impairment Quoted Prices In Active Markets for Identical Items (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses for the six months ended June 30, 2016 Real estate $ 5,488 $ — $ — $ 5,488 $ (4,826 ) for the year ended December 31, 2015 Real estate $ 11,489 $ — $ 11,489 $ — $ (132 ) The following table sets forth quantitative information about the unobservable inputs (Level 3) of our real estate that was recorded at fair value as of the date of its impairment in 2016 (in thousands): Fair Value of Assets at Impairment Valuation Technique Unobservable Input Value Real estate on which impairment losses were recognized $ 5,488 Discounted Cash Flow Discount rate 9.0% Terminal capitalization rate 7.5% Financial Instruments not Reported at Fair Value Financial instruments held at June 30, 2016 , and December 31, 2015 , but not measured at fair value on a recurring basis include cash and cash equivalents, restricted cash, accounts receivable, notes payable, accounts payable, payables to related parties, accrued liabilities, distributions payable, and other liabilities. With the exception of notes payable, the financial statement carrying amounts of these items approximate their fair values due to their short-term nature. Estimated fair values for notes payable have been determined using recent trading activity and/or bid-ask spreads and are classified as Level 2 in the fair value hierarchy. Carrying amounts of our notes payable and the related estimated fair value as of June 30, 2016 , and December 31, 2015 , are as follows (in thousands): June 30, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Notes payable $ 909,605 $ 914,277 $ 1,080,425 $ 1,084,625 Less: unamortized debt issuance costs (8,310 ) (8,854 ) Notes payable, net $ 901,295 $ 1,071,571

Real Estate Activities

Real Estate Activities	6 Months Ended
	Jun. 30, 2016
Real Estate Activities [Abstract]
Real Estate Activities	Real Estate Activities Sales of Real Estate Reported in Continuing Operations On March 1, 2016, we sold our Lawson Commons property to an unrelated third-party for a contract sales price of approximately $68.4 million , resulting in proceeds from sale of approximately $60.9 million . Lawson Commons is located in St. Paul, Minnesota, and contains approximately 436,000 rentable square feet. On June 17, 2016, we sold our FOUR40 property to an unrelated third-party for a contract sales price of approximately $191.0 million , resulting in proceeds from sale of approximately $189.1 million . FOUR40 is located in Chicago, Illinois, and contains approximately 1.0 million rentable square feet. We are entitled to an additional payment of up to $12.5 million subject to future performance of the property. Properties sold in 2016 and 2015 and included in continuing operations contributed a loss of approximately $0.8 million and $1.4 million to our net loss for the three months ended June 30, 2016 and 2015 , respectively. Properties sold in 2016 and 2015, and included in continuing operations, contributed a loss of approximately $1.4 million and $3.1 million to our net loss for the six months ended June 30, 2016 and 2015 , respectively. Sales of Real Estate Reported in Discontinued Operations No properties sold in 2016 have been classified as discontinued operations. The table below summarizes the results of operations for properties that have been classified as discontinued operations in the accompanying condensed consolidated statements of operations and comprehensive income (loss) for the three and six month periods ended June 30, 2015 (in thousands). This includes two properties that were held for sale at December 31, 2014 and sold in 2015. Three Months Ended Six Months Ended June 30, 2015 Rental revenue $ (124 ) $ 4,566 Expenses Property operating expenses 22 1,723 Interest expense 44 720 Real estate taxes (83 ) 633 Property management fees 14 121 Total expenses (3 ) 3,197 Income (loss) from discontinued operations (121 ) 1,369 Gain on sale of discontinued operations 6,077 14,683 Discontinued operations $ 5,956 $ 16,052

Investments in Unconsolidated E

Investments in Unconsolidated Entities	6 Months Ended
	Jun. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities We participate in real estate ventures for the purpose of acquiring and developing office properties in which we may or may not have a controlling financial interest. Our investments in unconsolidated entities consist of our noncontrolling interests in certain properties that are accounted for using the equity method of accounting. The following is a summary of our investments in unconsolidated entities as of June 30, 2016 , and December 31, 2015 (dollar amounts in thousands): Ownership Interest Investment Balance Entity Name Property June 30, December 31, 2015 June 30, December 31, 1301 Chestnut Associates, L.P. (1) Wanamaker Building 60.00 % 60.00 % $ 43,726 $ 42,898 Domain Junction LLC (2) (3) Domain 2 & 7 49.84 % 49.84 % 10,937 26,588 Domain Junction 8 Venture LLC (2) (3) Domain 8 50.00 % 50.00 % 17,749 14,193 COLDC 54 Holdings, LLC (3) Colorado Building 10.00 % 10.00 % 878 949 GSTDC 72 Holdings, LLC (3) 1325 G Street 10.00 % 10.00 % 4,316 4,370 Total $ 77,606 $ 88,998 _________________ (1) All major decisions for this entity require a vote of 70% (and in some instances 75% ) of the ownership group. (2) All major decisions for this entity are made by the other owner. (3) We have evaluated our investments in unconsolidated entities in order to determine if they are VIEs. Based on our assessment, we have identified each of these entities as a VIE, but we are not the primary beneficiary, as we do not have the power to direct the activities that most significantly impact the economic performance of these entities. For these VIEs in which we are not deemed to be the primary beneficiary, we continue to account for them using the equity method. The maximum amount of exposure to loss with respect to these VIEs is the carrying amount of our investment. Additionally, we are required to fund up to $0.3 million in additional capital contributions to the Domain Junction 8 Venture LLC for the development of Domain 8. At June 30, 2016 , these VIEs have total assets of approximately $330.2 million and total liabilities of approximately $230.9 million , as outlined in the summarized balance sheets presented below. The summarized balance sheets of our unconsolidated entities as of as of June 30, 2016 , and December 31, 2015 , are as follows (in thousands): as of June 30, 2016 Total Wanamaker Other (50% or less owned entities) Real estate, net $ 396,381 $ 127,402 $ 268,979 Real estate intangibles, net 50,044 11,234 38,810 Cash, cash equivalents and restricted cash 23,815 12,350 11,465 Other assets 21,919 10,973 10,946 Total assets $ 492,159 $ 161,959 $ 330,200 Notes payable, net $ 285,851 $ 73,818 $ 212,033 Accounts payable 10,183 510 9,673 Other liabilities 14,888 5,668 9,220 Equity 181,237 81,963 99,274 Total liabilities and equity $ 492,159 $ 161,959 $ 330,200 Company’s share of equity $ 70,449 $ 49,178 $ 21,271 Basis differences (1) 7,157 (5,452 ) 12,609 Carrying value of the Company’s investment in unconsolidated entities $ 77,606 $ 43,726 $ 33,880 ____________________ (1) This amount represents the aggregate difference between our historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differences occur from impairment of investments and upon the transfer of assets that were previously owned by us into a joint venture. In addition, certain acquisition, transaction and other costs, including capitalized interest, may not be reflected in the net assets at the joint venture level. as of December 31, 2015 Total Wanamaker Other (50% or less owned entities) Real estate, net $ 379,646 $ 128,358 $ 251,288 Real estate intangibles, net 54,470 12,087 42,383 Cash, cash equivalents and restricted cash 23,814 12,819 10,995 Other assets 16,796 8,851 7,945 Total assets $ 474,726 $ 162,115 $ 312,611 Notes payable, net $ 246,500 $ 75,124 $ 171,376 Accounts payable 8,187 21 8,166 Other liabilities 19,144 6,386 12,758 Equity 200,895 80,584 120,311 Total liabilities and equity $ 474,726 $ 162,115 $ 312,611 Company’s share of equity $ 81,982 $ 48,350 $ 33,632 Basis differences (1) 7,016 (5,452 ) 12,468 Carrying value of the Company’s investment in unconsolidated entities $ 88,998 $ 42,898 $ 46,100 ________________ (1) This amount represents the aggregate difference between our historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differences occur from impairment of investments and upon the transfer of assets that were previously owned by us into a joint venture. In addition, certain acquisition, transaction and other costs, including capitalized interest, may not be reflected in the net assets at the joint venture level. Our equity in operations of investments represents our proportionate share of the combined earnings and losses of our investments for the period of our ownership. The summarized statements of operations of our unconsolidated entities for the three months ended June 30, 2016 and 2015, are as follows (in thousands): Three months ended June 30, 2016 Total Wanamaker Other Revenue $ 14,866 $ 6,842 $ 8,024 Income from continuing operations $ 1,323 $ 1,045 $ 278 Net income $ 1,323 $ 1,045 $ 278 Company’s share of net income from continuing operations $ 818 $ 627 $ 191 Basis differences and elimination of inter-entity fees 5 135 (130 ) Equity in operations of investments $ 823 $ 762 $ 61 ________________ (1) Includes combined earnings and losses for Domain 2&7, Domain 8, Colorado Building, and 1325 G Street. Three months ended June 30, 2015 Total Wanamaker Other Revenue $ 10,207 $ 6,663 $ 3,544 Income (loss) from continuing operations $ (3,779 ) $ 640 $ (4,419 ) Net income (loss) $ (3,779 ) $ 640 $ (4,419 ) Company’s share of net income (loss) from continuing operations $ (58 ) $ 384 $ (442 ) Basis differences and elimination of inter-entity fees 127 125 2 Equity in operations of investments $ 69 $ 509 $ (440 ) _______________ (1) Includes combined earnings and losses for Colorado Building, 1325 G Street, and Paces West, a property in which we owned a 10% interest during the three months ended June 30, 2015. Paces West was sold on November 30, 2015. Colorado Building and 1325 G Street were included as unconsolidated entities beginning on June 30, 2015. Our equity in operations of investments represents our proportionate share of the combined earnings and losses of our investments for the period of our ownership. The summarized statements of operations of our unconsolidated entities for the six months ended June 30, 2016 and 2015, are as follows (in thousands): Six months ended June 30, 2016 Total Wanamaker Other Revenue $ 28,459 $ 13,147 $ 15,312 Income (loss) from continuing operations $ 1,155 $ 1,879 $ (724 ) Net income (loss) $ 1,155 $ 1,879 $ (724 ) Company’s share of net income from continuing operations $ 1,244 $ 1,128 $ 116 Basis differences and elimination of inter-entity fees (6 ) 255 (261 ) Equity in operations of investments $ 1,238 $ 1,383 $ (145 ) _____________________ (1) Includes combined earnings and losses for Domain 2&7, Domain 8, Colorado Building, and 1325 G Street. Six months ended June 30, 2015 Total Wanamaker Other Revenue $ 19,689 $ 12,954 $ 6,735 Income (loss) from continuing operations $ (3,875 ) $ 911 $ (4,786 ) Net income (loss) $ (3,875 ) $ 911 $ (4,786 ) Company’s share of net income (loss) from continuing operations $ 68 $ 547 $ (479 ) Basis differences and elimination of inter-entity fees 244 241 3 Equity in operations of investments $ 312 $ 788 $ (476 ) _______________ (1) Includes combined earnings and losses for Colorado Building, 1325 G Street, and Paces West, a property in which we owned a 10% interest during the six months ended June 30, 2015. Paces West was sold on November 30, 2015. Colorado Building and 1325 G Street were included as unconsolidated entities beginning on June 30, 2015.

Real Estate Under Development

Real Estate Under Development	6 Months Ended
	Jun. 30, 2016
Real Estate Under Development [Abstract]
Real Estate Under Development	Real Estate Under Development When we are engaged in activities to get a potential development ready for its intended use, we capitalize interest, property taxes, insurance, ground lease payments, and direct construction costs. For the six months ended June 30, 2016 , we capitalized a total of approximately $3.8 million , including approximately $0.1 million in interest. For the six months ended June 30, 2015 , we capitalized a total of approximately $5.2 million , including approximately $0.6 million in interest. These costs are classified as real estate under development on our condensed consolidated balance sheets until such time that the development is complete.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities We may be exposed to the risk associated with variability of interest rates that might impact our cash flows and the results of our operations. Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish this objective, we have used interest rate swaps as part of our interest rate risk management strategy. Our interest rate swaps involve the receipt of variable-rate amounts from counterparties in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Our hedging strategy of entering into interest rate swaps, therefore, is to eliminate or reduce, to the extent possible, the volatility of cash flows. The following table summarizes the notional values of our derivative financial instruments (in thousands) as of June 30, 2016 . The notional values provide an indication of the extent of our involvement in these instruments at June 30, 2016 , but do not represent exposure to credit, interest rate, or market risks. Type/Description Notional Value Index Strike Rate Effective Date Maturity Date Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.6775 % 12/31/14 10/31/19 Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.6935 % 04/30/15 10/31/19 Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.7615 % 06/30/15 05/31/22 Interest rate swap - cash flow hedge $ 150,000 one-month LIBOR 1.7695 % 06/30/15 05/31/22 The table below presents the fair value of our derivative financial instruments, included in “other liabilities” on our condensed consolidated balance sheets, as of June 30, 2016 , and December 31, 2015 (in thousands): Derivatives designated as hedging instruments: Derivative Liabilities June 30, December 31, Interest rate swaps $ (21,219 ) $ (3,866 ) The tables below present the effect of the change in fair value of derivative financial instruments in our condensed consolidated statements of operations and comprehensive income (loss) for the six months ended June 30, 2016 and 2015 (in thousands): Derivatives in Cash Flow Hedging Relationship Gain (loss) recognized in OCI on derivatives (effective portion) Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest rate swaps $ (2,532 ) $ 6,146 $ (15,412 ) $ 1,590 Amount reclassified from OCI into income (effective portion) Three Months Ended Six Months Ended Location June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest expense (1) $ 1,707 $ 809 $ 3,429 $ 1,280 ______________ (1) Increases in fair value as a result of accrued interest associated with our swap transactions are recorded in accumulated OCI and subsequently reclassified into income. Such amounts are shown net in the statements of changes in equity and offset dollar for dollar. Amount recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Three Months Ended Six Months Ended Location June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest expense (1) $ 1,941 $ — $ 1,941 $ — _____________ (1) Represents the portion of the change in fair value of our interest rate swaps attributable to the mismatch between an interest rate floor on our hedged debt and no floor on the index rate in our interest rate swaps which causes hedge ineffectiveness. Amounts reported in accumulated OCI related to derivatives will be reclassified to interest expense as interest payments and accruals are made on our variable-rate debt. During the next twelve months, we estimate that approximately $6.5 million will be reclassified as an increase to interest expense. As of June 30, 2016 , the fair value of our derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk related to these agreements, was approximately $22.1 million . As of June 30, 2016 , we have not posted any collateral related to these agreements. If we had breached any of these provisions at June 30, 2016 , we could have been required to settle our obligations under the agreements at the termination value of approximately $22.1 million . We have agreements with our derivative counterparties that contain provisions where if we default on any of our indebtedness for at least 30 days, during which time such default has not been remedied, and in all cases provided that the aggregate amount of all such default is not less than $10.0 million for recourse debt or $75.0 million for non-recourse debt, then we could also be declared in default on our derivative obligations.

Notes Payable

Notes Payable	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Notes Payable	Notes Payable Our notes payable, net were approximately $901.3 million at June 30, 2016 . Approximately $333.7 million of these notes payable, net were secured by real estate assets with a carrying value of approximately $333.0 million as of June 30, 2016 . As of June 30, 2016 , all of our outstanding debt was fixed rate debt (or effectively fixed rate debt, through the use of interest rate swaps), with the exception of approximately $50.0 million from certain borrowings under our credit facility. As of June 30, 2016 , the stated annual interest rates on our outstanding debt, excluding mezzanine financing, ranged from 1.96% to 6.09% . We had mezzanine financing on one property with a stated annual interest rate of 9.80% . As of June 30, 2016 , the effective weighted average interest rate for our consolidated debt is approximately 4.27% . For our loan that is in default and detailed below, we incur a default interest rate that is 500 basis points higher than the stated interest rate, which resulted in an overall effective weighted average interest rate of approximately 4.54% as of June 30, 2016, for our consolidated debt and an increase in interest expense for the six months ended June 30, 2016 , of approximately $1.2 million . We anticipate, although we can provide no assurance, that when the property to which such loan relates is sold, or if ownership of this property is conveyed to the lender, the default interest will be forgiven. Our loan agreements generally require us to comply with certain reporting and financial covenants. As of June 30, 2016 , we were in default on a non-recourse property loan with an outstanding balance of approximately $48.7 million secured by our Fifth Third Center property located in Columbus, Ohio, which has a carrying value of approximately $34.8 million as of June 30, 2016 . A receiver was appointed for this property in March 2016. The loan had an original maturity date of July 2016, and we are currently working with the lender to dispose of this property on their behalf. As of June 30, 2016 , other than the default discussed above, we believe we were in compliance with the covenants under each of our loan agreements, including our credit facility. Our consolidated debt has maturity dates that range from July 2016 to June 2022. The following table provides information regarding the timing of principal payments of our notes payable, net as of June 30, 2016 (in thousands): Principal payments due in: July 2016 - December 2016 $ 112,951 2017 130,021 2018 1,622 2019 301,723 2020 1,814 Thereafter 361,474 Less: unamortized debt issuance costs (1) (8,310 ) Notes payable, net $ 901,295 ________________ (1) Excludes approximately $3.0 million of unamortized debt issuance costs associated with the revolving line of credit because these costs are presented as an asset on our condensed consolidated balance sheets. Subsequent to June 30, 2016 , approximately $62.8 million of secured debt due in November 2016 was repaid. As discussed in Note 3, on January 1, 2016, we adopted the new accounting standard on deferred debt issuance costs. As of June 30, 2016 , and December 31, 2015, approximately $8.3 million and $8.9 million , respectively, of unamortized deferred debt issuance costs associated with our debt are presented on the condensed consolidated balance sheets netted against the notes payable. As of June 30, 2016 , and December 31, 2015, unamortized deferred debt issuance costs of approximately $3.0 million and $3.1 million , respectively, associated with the revolving line of credit under our credit facility, discussed below, continue to be presented as an asset on the condensed consolidated balance sheets. Deferred debt issuance costs are recorded at cost and amortized to interest expense using a straight-line method that approximates the effective interest method over the anticipated life of the related debt. Credit Facility We have a credit agreement through our operating partnership, Tier OP. In March 2016, the available borrowings under the credit facility were increased, and as a result of meeting certain financial covenants, the credit facility was converted from secured to unsecured and now provides for total borrowings of up to $860.0 million , subject to our compliance with certain financial covenants. The facility consists of a $300.0 million term loan, a $275.0 million term loan, and a $285.0 million revolving line of credit. The first term loan matures on December 18, 2019. The second term loan matures on June 30, 2022. The revolving line of credit matures on December 18, 2018, and can be extended one additional year subject to certain conditions and payment of an extension fee. The annual interest rate on the credit facility is equal to either, at our election, (1) the “base rate” (calculated as the greatest of (i) the agent’s “prime rate”; (ii) 0.5% above the Federal Funds Effective Rate; or (iii) the LIBOR Market Index Rate plus 1.0% ) plus the applicable margin or (2) LIBOR for an interest period of one , three , or six months plus the applicable margin. The applicable margin will be determined based on the ratio of total indebtedness to total asset value and ranges from 35 basis points to 250 basis points. We have entered into interest rate swap agreements to hedge interest rates on $525.0 million of these borrowings to manage our exposure to future interest rate movements. All amounts owed are guaranteed by us and certain subsidiaries of Tier OP. As of June 30, 2016 , we had approximately $575.0 million in borrowings outstanding under the term loans, and no borrowings outstanding under the revolving line of credit with the ability, subject to our most restrictive financial covenants, to borrow an additional approximately $126.4 million under the facility as a whole. As of June 30, 2016 , the weighted average effective interest rate for borrowings under the credit facility as a whole, inclusive of our interest rate swaps, was approximately 3.33% .

Equity

Equity	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Equity	Equity Series A Convertible Preferred Stock As of December 31, 2015, we had 10,000 shares of Series A participating, voting, convertible preferred stock (the “Series A Convertible Preferred Stock”) outstanding. In connection with the listing of our common stock on the NYSE on July 23, 2015, an automatic conversion of the Series A Convertible Preferred Stock was triggered with the number of shares to be issued not determinable until March 2, 2016, based on the Conversion Company Value, as defined in the Articles Supplementary. On March 2, 2016, based on the Conversion Company Value, no shares of common stock were issued, and the shares of Series A Convertible Preferred Stock were canceled. Stock Plans Our 2015 Equity Incentive Plan allows for and our 2005 Incentive Award Plan allowed for equity-based incentive awards to be granted to our employees, non-employee directors, and key persons as detailed below: Stock options. As of June 30, 2016 , we had outstanding options held by our independent directors to purchase 12,495 shares of our common stock at a weighted average exercise price of approximately $40.13 per share. These options are all fully vested and have expiration dates that range from July 2018 to June 2022. The options were anti-dilutive to earnings per share for each period presented. Restricted stock units. We have outstanding restricted stock units (“RSUs”) held by our independent directors. These units vest 13 months after the grant date. Subsequent to vesting, the restricted stock units will be converted to an equivalent number of shares of common stock upon the earlier to occur of the following events or dates: (i) separation from service for any reason other than cause; (ii) a change in control of the Company; (iii) death; or (iv) specific dates chosen by the independent directors that range from January 2017 to December 2020. Expense is measured at the grant date based on the estimated fair value of the award and is recognized over the vesting period. The following is a summary of the number of outstanding RSUs held by our independent directors as of June 30, 2016 and 2015 : June 30, 2016 June 30, 2015 Units Weighted Average Price per unit Units Weighted Average Price per unit Outstanding at the beginning of the year 28,705 $ 18.29 13,841 $ 24.69 Issued 18,275 $ 15.05 — $ — Forfeited — $ — (2 ) $ 24.82 Converted (7,725 ) $ 19.96 (2,078 ) $ 24.06 Outstanding at the end of the period (1) 39,255 $ 16.45 11,761 $ 24.80 _____________ (1) As of June 30, 2016 , 6,046 RSUs are vested. On January 26, 2016, 111,063 restricted stock units were issued to employees with a grant price of $15.26 per unit. These restricted stock units vest on December 31, 2018, at which time they will be converted into a number of shares of common stock, which could range from zero shares to 222,126 shares, based on our annualized total stockholder return (“TSR”) percentage as compared to three metrics: our TSR on a predetermined absolute basis, the TSR of the constituent companies of the NAREIT Office Index (unweighted), and the TSR of a select group of peer companies. Expense is measured at the grant date, based on the estimated fair value of the award ( $19.18 per unit) as determined by a Monte Carlo simulation based model using the following assumptions: Assumption Value Expected volatility 24% Risk-free interest rate 1.15% Expected term 35 months Expected dividend yield 4.5% Restricted stock units were anti-dilutive to earnings per share for each period presented. Restricted stock. We have outstanding restricted stock held by employees. For restricted stock issued in 2016, restrictions lapse one-third on each of December 30, 2016, 2017, and 2018. For restricted stock issued in December 2015, restrictions lapse one-third on the grant date, one-third one year after the grant date, and one-third two years after the grant date. For restricted stock issued prior to December 2015, restrictions lapse in 25% increments annually over the four -year period following the grant date. Compensation cost is measured at the grant date, based on the estimated fair value of the award and is recognized as expense over the service period based on a tiered lapse schedule and estimated forfeiture rates. The restricted stock was anti-dilutive to earnings per share for each period presented. The following is a summary of the number of shares of restricted stock outstanding as of June 30, 2016 and 2015 : June 30, 2016 June 30, 2015 Shares Weighted Average Price per share Shares Weighted Average Price per share Outstanding at the beginning of the year 281,905 $ 22.46 118,563 $ 24.73 Issued 119,523 $ 15.19 106,811 $ 26.88 Forfeiture (8,406 ) $ 19.98 (10 ) $ 25.30 Restrictions lapsed (59,673 ) $ 25.64 (33,726 ) $ 24.65 Outstanding at the end of the period 333,349 $ 19.34 191,638 $ 25.94 For the three months ended June 30, 2016 and 2015 , we recognized a total of approximately $1.1 million and $0.6 million , respectively, for compensation expense related to the amortization of all of the equity-based incentive awards outlined above. For the six months ended June 30, 2016 and 2015 , we recognized a total of approximately $2.0 million and $1.1 million , respectively, for compensation expense related to the amortization of all of the equity-based incentive awards outlined above. As of June 30, 2016 , the total remaining compensation cost on unvested awards was approximately $5.8 million , with a weighted average remaining contractual life of approximately 1.8 years. Distributions Our board of directors reinstated quarterly cash distributions in the second quarter of 2015 at $0.18 per share of common stock and has authorized cash distributions in the same amount for each quarter since that time. Distributions declared for each quarter were paid in the subsequent quarter. The following table reflects the distributions declared for our common stock, Series A Convertible Preferred Stock, and noncontrolling interests (OP units and vested restricted stock units) during the six months ended June 30, 2016 and for the year ended December 31, 2015 (in thousands). Common Stockholders Preferred Stockholders Noncontrolling Interests Total 2016 1st Quarter $ 8,600 $ 8,594 $ — $ 6 2nd Quarter 8,601 8,594 — 7 Total $ 17,201 $ 17,188 $ — $ 13 2015 1st Quarter $ — $ — $ — $ — 2nd Quarter 9,028 9,011 2 15 3rd Quarter 8,556 8,539 2 15 4th Quarter 8,596 8,576 2 18 Total $ 26,180 $ 26,126 $ 6 $ 48

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies As of June 30, 2016 , we had commitments of approximately $31.7 million for future tenant improvements and leasing commissions. We have employment agreements with five of our executive officers. The term of each employment agreement ends on July 15, 2018, provided that the term will automatically continue for an additional one -year period unless either party provides 60 days written notice of non-renewal prior to the expiration of the initial term. The agreements provide for lump sum payments and an immediate lapse of restrictions on compensation received under the long-term incentive plan upon termination of employment without cause. As a result, in the event we terminated all of these agreements without cause as of June 30, 2016 , we would have recognized approximately $13.6 million in related compensation expense.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Supplemental cash flow information is summarized below for the six months ended June 30, 2016 and 2015 (in thousands): Six Months Ended June 30, 2016 June 30, 2015 Interest paid, net of amounts capitalized $ 19,742 $ 31,668 Income taxes paid $ 1,964 $ 936 Non-cash investing activities: Property and equipment additions in accounts payable and accrued liabilities $ 12,016 $ 13,295 Amortization of deferred financing fees in building and improvements, net $ — $ 165 Non-cash financing activities: Cancellation of Series A Convertible Preferred Stock $ 2,700 $ — Mortgage notes assumed by purchaser $ — $ 47,074 Financing costs in accounts payable and accrued liabilities $ — $ 55 Unrealized gain on interest rate derivatives $ — $ 1,590 Unrealized loss on interest rate derivatives $ 15,412 $ — Accrual for distributions declared $ 8,602 $ 9,028 Contributions from noncontrolling interests $ — $ 1,000

Basis of Presentation and Sig20

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Reclassification	Reclassification Certain amounts previously reflected in the prior year condensed consolidated balance sheet and condensed consolidated statement of cash flows have been reclassified to conform to our 2016 presentation.
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation Our condensed consolidated financial statements include our accounts, the accounts of variable interest entities (“VIEs”), if any, in which we are the primary beneficiary, and the accounts of other subsidiaries over which we have control. VIEs, as defined by GAAP, are generally entities that lack sufficient equity to finance their activities without additional financial support from other parties or whose equity holders lack adequate decision making ability. Interests in entities acquired are evaluated based on applicable GAAP guidance which requires the consolidation of VIEs in which we are deemed to be the primary beneficiary. We adopted new accounting guidance on January 1, 2016, and certain of our entities were determined to be VIEs under the new guidance. While this determination under the new guidance did not impact the conclusions regarding consolidation of these entities, we have included additional disclosures relating to these entities. The determination of the primary beneficiary requires management to make significant estimates and judgments about our rights, obligations, and economic interests in such entities as well as the same of the other owners. For entities in which we have less than a controlling financial interest or entities with respect to which we are not deemed to be the primary beneficiary, the entities are accounted for using the equity method of accounting. If the interest is in an entity that is determined not to be a VIE, then the entity is evaluated for consolidation based on legal form, economic substance, and the extent to which we have control and/or substantive participating rights under the respective ownership agreement. All inter-company transactions, balances, and profits have been eliminated in consolidation.
Real Estate	We amortize the value of in-place leases, in-place tenant improvements, and in-place leasing commissions to expense over the initial term of the respective leases. The tenant relationship values are amortized to expense over the tenants’ respective initial lease terms and any anticipated renewal periods, but in no event does the amortization period for intangible assets or liabilities exceed the remaining depreciable life of the building. Should a tenant terminate its lease, the unamortized portion of the acquired lease intangibles related to that tenant would be charged to expense. The estimated remaining average useful lives for acquired lease intangibles range from an ending date of July 2016 to an ending date of March 2024.
Impairment of Real Estate Related Assets	Impairment of Real Estate-Related Assets For our consolidated real estate assets, we monitor events and changes in circumstances indicating that the carrying amounts of the real estate assets may not be recoverable. When such events or changes in circumstances are present, we assess potential impairment by comparing estimated future undiscounted cash flows expected to be generated over the life of the asset including its eventual disposition, to the carrying amount of the asset. In the event that the carrying amount exceeds the estimated future undiscounted cash flows and also exceeds the fair value of the asset, we recognize an impairment loss to adjust the carrying amount of the asset to its estimated fair value. Our process to estimate the fair value of an asset involves using bona fide purchase offers or the expected sales price of an executed sales agreement, which would be considered Level 1 or Level 2 assumptions within the fair value hierarchy. To the extent that this type of third party information is unavailable, we estimate projected cash flows and a risk-adjusted rate of return that we believe would be used by a third party market participant in estimating the fair value of an asset. This is considered a Level 3 assumption within the fair value hierarchy. These projected cash flows are prepared internally by the Company’s asset management professionals and are updated quarterly to reflect in-place and projected leasing activity, market revenue and expense growth rates, market capitalization rates, discount rates, and changes in economic and other relevant conditions. The Company’s Chief Financial Officer, Chief Accounting Officer, and Managing Director - Asset Management review these projected cash flows to assure that the valuation is prepared using reasonable inputs and assumptions which are consistent with market data or with assumptions that would be used by a third party market participant and assume the highest and best use of the real estate investment. For the six months ended June 30, 2016 and 2015 , we recorded non-cash impairment charges totaling approximately $4.8 million and $0.1 million , respectively, related to the impairment of consolidated real estate assets. The impairment losses recorded in 2016 relate to an asset assessed for impairment due to a change in management’s estimate of the intended hold period. The impairment loss recorded in 2015 related to final estimated closing costs incurred in connection with the disposition of a property that was impaired in 2014. For our unconsolidated real estate assets, at each reporting date we compare the estimated fair value of our investment to the carrying amount. An impairment charge is recorded to the extent the fair value of our investment is less than the carrying amount and the decline in value is determined to be other than a temporary decline. We had no impairment charges related to our investments in unconsolidated entities for the six months ended June 30, 2016 and 2015 . In evaluating our investments for impairment, management makes several estimates and assumptions, including, but not limited to, the projected date of disposition (the intended hold period) and sales price for each property, the estimated future cash flows of each property during our estimated ownership period, and for unconsolidated investments, the estimated future distributions from the investment. A change in these estimates and assumptions could result in understating or overstating the carrying amount of our investments which could be material to our financial statements. We undergo continuous evaluations of property level performance, credit market conditions, and financing options. If our assumptions regarding the cash flows expected to result from the use and eventual disposition of our properties decrease or our expected hold periods decrease, we may incur future impairment charges on our real estate-related assets. In addition, we may incur impairment charges on assets classified as held for sale in the future if the carrying amount of the asset upon classification as held for sale exceeds the estimated fair value, less costs to sell.
Accounts Receivable, net	Our allowance for doubtful accounts is an estimate based on management’s evaluation of accounts where it has determined that a tenant may not meet its financial obligations. In these situations, management uses its judgment, based on the facts and circumstances, and records a reserve for that tenant against amounts due to reduce the receivable to an amount it believes is collectible. These reserves are reevaluated and adjusted as additional information becomes available.
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities Investments in unconsolidated entities consist of our noncontrolling interests in properties. We account for these investments using the equity method of accounting in accordance with GAAP. We use the equity method of accounting when we have significant influence, but not control, of the decision-making involved in the operating and financial decisions of these investments and thereby have some responsibility to create a return on our investment. The equity method of accounting requires these investments to be initially recorded at cost and subsequently increased (decreased) for our share of net income (loss), including eliminations for our share of inter-company transactions, and increased (decreased) for contributions (distributions). To the extent that we contribute assets to an unconsolidated entity, our investment in the unconsolidated entity is recorded at our cost basis in the assets that were contributed to the entity. To the extent that our cost basis is different than the basis reflected at the entity level, the basis difference is generally amortized over the life of the related asset and included in our share of equity in operations of investments. For unconsolidated investments that have properties under development, we capitalize interest expense to our investment basis using our weighted average interest rate of consolidated debt. Capitalization begins when we are engaged in the activities necessary to get the property ready for its intended use. We cease capitalization when the development is completed and ready for its intended use or if the intended use changes such that capitalization is no longer appropriate.
Other Intangible Assets, net	Other Intangible Assets, net Other intangible assets consist of below-market ground leases on properties where a third party owns and has leased the underlying land to us.
Revenue Recognition	Revenue Recognition We recognize rental income generated from all leases of consolidated real estate assets on a straight-line basis over the terms of the respective leases, including the effect of rent holidays, if any. Each of the amounts presented below include rental revenue amounts recognized in discontinued operations. The total net increase to rental revenue due to straight-line rent adjustments for the three months ended June 30, 2016 and 2015 , was approximately $1.3 million and $4.3 million , respectively. The total net increase to rental revenue due to straight-line rent adjustments for the six months ended June 30, 2016 and 2015 , was approximately $3.8 million and $7.1 million , respectively. When a tenant exceeds its tenant improvement allowance, this amount is reimbursed to us and recorded as a deferred rent liability, which is recognized as rental revenue over the life of the lease. The total net increase to rental revenue due to this deferred rent for the three months ended June 30, 2016 and 2015 , was approximately $0.9 million and $0.6 million , respectively. The total net increase to rental revenue due to this deferred rent for the six months ended June 30, 2016 and 2015 , was approximately $1.9 million and $1.0 million , respectively. Our rental revenue also includes amortization of acquired above- and below-market leases. The total net increase to rental revenue due to the amortization of acquired above- and below-market leases for the three months ended June 30, 2016 and 2015 , was approximately $1.1 million and $1.3 million , respectively. The total net increase to rental revenue due to the amortization of acquired above- and below-market leases for the six months ended June 30, 2016 and 2015 , was approximately $2.5 million and $2.5 million , respectively. Revenues relating to lease termination fees are recognized on a straight-line basis amortized from the time that a tenant’s right to occupy the leased space is modified through the end of the revised lease term. For the three months ended June 30, 2016 and 2015 , we recognized lease termination fees of approximately $0.7 million and $0.1 million , respectively. For the six months ended June 30, 2016 and 2015 , we recognized lease termination fees of approximately $1.3 million and $0.7 million , respectively.

Basis of Presentation and Sig21

Basis of Presentation and Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2016
Real Estate [Abstract]
Schedule of cost basis, accumulated depreciation and amortization related to entity's consolidated real estate properties and related lease intangibles	As of June 30, 2016 , and December 31, 2015 , the cost basis and accumulated depreciation and amortization related to our consolidated depreciable real estate properties and related lease intangibles were as follows (in thousands): Lease Intangibles Assets Liabilities Acquired Above-Market Leases Acquired Below-Market Leases Buildings and Improvements Other Lease Intangibles as of June 30, 2016 Cost $ 1,643,191 $ 138,703 $ 5,052 $ (44,122 ) Less: accumulated depreciation and amortization (534,936 ) (71,501 ) (3,916 ) 35,161 Net $ 1,108,255 $ 67,202 $ 1,136 $ (8,961 ) Lease Intangibles Assets Liabilities Acquired Above-Market Leases Acquired Below-Market Leases Buildings and Improvements Other Lease Intangibles as of December 31, 2015 Cost $ 1,914,664 $ 164,636 $ 5,383 $ (52,744 ) Less: accumulated depreciation and amortization (566,464 ) (82,476 ) (3,995 ) 40,810 Net $ 1,348,200 $ 82,160 $ 1,388 $ (11,934 )
Anticipated amortization associated with the acquired lease intangibles for each of the five years	Anticipated amortization associated with acquired lease intangibles for each of the following five years is as follows (in thousands): July 2016 - December 2016 $ 1,822 2017 $ 1,926 2018 $ 1,108 2019 $ 1,002 2020 $ 1,092
Accounts Receivable [Abstract]
Summary of net accounts receivable	The following is a summary of our accounts receivable as of June 30, 2016 , and December 31, 2015 (in thousands): June 30, December 31, Straight-line rental revenue receivable $ 63,951 $ 73,420 Tenant receivables 4,977 5,972 Non-tenant receivables 582 1,549 Allowance for doubtful accounts (3,182 ) (4,713 ) Total $ 66,328 $ 76,228
Other Intangible Assets, Net [Abstract]
Schedule of other intangible assets	As of June 30, 2016 , and December 31, 2015 , the cost basis and accumulated amortization related to our consolidated other intangible assets were as follows (in thousands): June 30, December 31, Cost $ 11,177 $ 11,177 Less: accumulated amortization (1,290 ) (1,091 ) Net $ 9,887 $ 10,086

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities measured at fair value on a recurring basis	The following table sets forth our financial liabilities measured at fair value on a recurring basis, which equals book value, by level within the fair value hierarchy as of June 30, 2016 , and December 31, 2015 (in thousands). Basis of Fair Value Measurements Quoted Prices In Active Markets for Identical Items (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Description June 30, 2016 Derivative financial instruments: Liabilities $ (21,219 ) $ — $ (21,219 ) $ — December 31, 2015 Derivative financial instruments: Liabilities $ (3,866 ) $ — $ (3,866 ) $ —
Schedule of assets measured at fair value and impaired during the periods presented	The following table summarizes those assets which were measured at fair value and impaired during 2016 and 2015 (in thousands): Basis of Fair Value Measurements Description Fair Value of Assets at Impairment Quoted Prices In Active Markets for Identical Items (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses for the six months ended June 30, 2016 Real estate $ 5,488 $ — $ — $ 5,488 $ (4,826 ) for the year ended December 31, 2015 Real estate $ 11,489 $ — $ 11,489 $ — $ (132 )
Summary of quantitative information about the unobservable inputs of Level 3 real estate recorded at fair value	The following table sets forth quantitative information about the unobservable inputs (Level 3) of our real estate that was recorded at fair value as of the date of its impairment in 2016 (in thousands): Fair Value of Assets at Impairment Valuation Technique Unobservable Input Value Real estate on which impairment losses were recognized $ 5,488 Discounted Cash Flow Discount rate 9.0% Terminal capitalization rate 7.5%
Schedule of carrying amounts and related estimated fair value of notes payable	Carrying amounts of our notes payable and the related estimated fair value as of June 30, 2016 , and December 31, 2015 , are as follows (in thousands): June 30, 2016 December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value Notes payable $ 909,605 $ 914,277 $ 1,080,425 $ 1,084,625 Less: unamortized debt issuance costs (8,310 ) (8,854 ) Notes payable, net $ 901,295 $ 1,071,571

Real Estate Activities (Tables)

Real Estate Activities (Tables)	6 Months Ended
	Jun. 30, 2016
Real Estate Activities [Abstract]
Summary of Results of Operations for Properties that have been Classified as Discontinued Operations	The table below summarizes the results of operations for properties that have been classified as discontinued operations in the accompanying condensed consolidated statements of operations and comprehensive income (loss) for the three and six month periods ended June 30, 2015 (in thousands). This includes two properties that were held for sale at December 31, 2014 and sold in 2015. Three Months Ended Six Months Ended June 30, 2015 Rental revenue $ (124 ) $ 4,566 Expenses Property operating expenses 22 1,723 Interest expense 44 720 Real estate taxes (83 ) 633 Property management fees 14 121 Total expenses (3 ) 3,197 Income (loss) from discontinued operations (121 ) 1,369 Gain on sale of discontinued operations 6,077 14,683 Discontinued operations $ 5,956 $ 16,052

Investments in Unconsolidated24

Investments in Unconsolidated Entities (Tables)	6 Months Ended
	Jun. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Summary of the entity's investments in unconsolidated entities	The following is a summary of our investments in unconsolidated entities as of June 30, 2016 , and December 31, 2015 (dollar amounts in thousands): Ownership Interest Investment Balance Entity Name Property June 30, December 31, 2015 June 30, December 31, 1301 Chestnut Associates, L.P. (1) Wanamaker Building 60.00 % 60.00 % $ 43,726 $ 42,898 Domain Junction LLC (2) (3) Domain 2 & 7 49.84 % 49.84 % 10,937 26,588 Domain Junction 8 Venture LLC (2) (3) Domain 8 50.00 % 50.00 % 17,749 14,193 COLDC 54 Holdings, LLC (3) Colorado Building 10.00 % 10.00 % 878 949 GSTDC 72 Holdings, LLC (3) 1325 G Street 10.00 % 10.00 % 4,316 4,370 Total $ 77,606 $ 88,998 _________________ (1) All major decisions for this entity require a vote of 70% (and in some instances 75% ) of the ownership group. (2) All major decisions for this entity are made by the other owner. (3) We have evaluated our investments in unconsolidated entities in order to determine if they are VIEs. Based on our assessment, we have identified each of these entities as a VIE, but we are not the primary beneficiary, as we do not have the power to direct the activities that most significantly impact the economic performance of these entities. For these VIEs in which we are not deemed to be the primary beneficiary, we continue to account for them using the equity method. The maximum amount of exposure to loss with respect to these VIEs is the carrying amount of our investment. Additionally, we are required to fund up to $0.3 million in additional capital contributions to the Domain Junction 8 Venture LLC for the development of Domain 8. At June 30, 2016 , these VIEs have total assets of approximately $330.2 million and total liabilities of approximately $230.9 million , as outlined in the summarized balance sheets presented below. The summarized balance sheets of our unconsolidated entities as of as of June 30, 2016 , and December 31, 2015 , are as follows (in thousands): as of June 30, 2016 Total Wanamaker Other (50% or less owned entities) Real estate, net $ 396,381 $ 127,402 $ 268,979 Real estate intangibles, net 50,044 11,234 38,810 Cash, cash equivalents and restricted cash 23,815 12,350 11,465 Other assets 21,919 10,973 10,946 Total assets $ 492,159 $ 161,959 $ 330,200 Notes payable, net $ 285,851 $ 73,818 $ 212,033 Accounts payable 10,183 510 9,673 Other liabilities 14,888 5,668 9,220 Equity 181,237 81,963 99,274 Total liabilities and equity $ 492,159 $ 161,959 $ 330,200 Company’s share of equity $ 70,449 $ 49,178 $ 21,271 Basis differences (1) 7,157 (5,452 ) 12,609 Carrying value of the Company’s investment in unconsolidated entities $ 77,606 $ 43,726 $ 33,880 ____________________ (1) This amount represents the aggregate difference between our historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differences occur from impairment of investments and upon the transfer of assets that were previously owned by us into a joint venture. In addition, certain acquisition, transaction and other costs, including capitalized interest, may not be reflected in the net assets at the joint venture level. as of December 31, 2015 Total Wanamaker Other (50% or less owned entities) Real estate, net $ 379,646 $ 128,358 $ 251,288 Real estate intangibles, net 54,470 12,087 42,383 Cash, cash equivalents and restricted cash 23,814 12,819 10,995 Other assets 16,796 8,851 7,945 Total assets $ 474,726 $ 162,115 $ 312,611 Notes payable, net $ 246,500 $ 75,124 $ 171,376 Accounts payable 8,187 21 8,166 Other liabilities 19,144 6,386 12,758 Equity 200,895 80,584 120,311 Total liabilities and equity $ 474,726 $ 162,115 $ 312,611 Company’s share of equity $ 81,982 $ 48,350 $ 33,632 Basis differences (1) 7,016 (5,452 ) 12,468 Carrying value of the Company’s investment in unconsolidated entities $ 88,998 $ 42,898 $ 46,100 ________________ (1) This amount represents the aggregate difference between our historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differences occur from impairment of investments and upon the transfer of assets that were previously owned by us into a joint venture. In addition, certain acquisition, transaction and other costs, including capitalized interest, may not be reflected in the net assets at the joint venture level. Our equity in operations of investments represents our proportionate share of the combined earnings and losses of our investments for the period of our ownership. The summarized statements of operations of our unconsolidated entities for the three months ended June 30, 2016 and 2015, are as follows (in thousands): Three months ended June 30, 2016 Total Wanamaker Other Revenue $ 14,866 $ 6,842 $ 8,024 Income from continuing operations $ 1,323 $ 1,045 $ 278 Net income $ 1,323 $ 1,045 $ 278 Company’s share of net income from continuing operations $ 818 $ 627 $ 191 Basis differences and elimination of inter-entity fees 5 135 (130 ) Equity in operations of investments $ 823 $ 762 $ 61 ________________ (1) Includes combined earnings and losses for Domain 2&7, Domain 8, Colorado Building, and 1325 G Street. Three months ended June 30, 2015 Total Wanamaker Other Revenue $ 10,207 $ 6,663 $ 3,544 Income (loss) from continuing operations $ (3,779 ) $ 640 $ (4,419 ) Net income (loss) $ (3,779 ) $ 640 $ (4,419 ) Company’s share of net income (loss) from continuing operations $ (58 ) $ 384 $ (442 ) Basis differences and elimination of inter-entity fees 127 125 2 Equity in operations of investments $ 69 $ 509 $ (440 ) _______________ (1) Includes combined earnings and losses for Colorado Building, 1325 G Street, and Paces West, a property in which we owned a 10% interest during the three months ended June 30, 2015. Paces West was sold on November 30, 2015. Colorado Building and 1325 G Street were included as unconsolidated entities beginning on June 30, 2015. Our equity in operations of investments represents our proportionate share of the combined earnings and losses of our investments for the period of our ownership. The summarized statements of operations of our unconsolidated entities for the six months ended June 30, 2016 and 2015, are as follows (in thousands): Six months ended June 30, 2016 Total Wanamaker Other Revenue $ 28,459 $ 13,147 $ 15,312 Income (loss) from continuing operations $ 1,155 $ 1,879 $ (724 ) Net income (loss) $ 1,155 $ 1,879 $ (724 ) Company’s share of net income from continuing operations $ 1,244 $ 1,128 $ 116 Basis differences and elimination of inter-entity fees (6 ) 255 (261 ) Equity in operations of investments $ 1,238 $ 1,383 $ (145 ) _____________________ (1) Includes combined earnings and losses for Domain 2&7, Domain 8, Colorado Building, and 1325 G Street. Six months ended June 30, 2015 Total Wanamaker Other Revenue $ 19,689 $ 12,954 $ 6,735 Income (loss) from continuing operations $ (3,875 ) $ 911 $ (4,786 ) Net income (loss) $ (3,875 ) $ 911 $ (4,786 ) Company’s share of net income (loss) from continuing operations $ 68 $ 547 $ (479 ) Basis differences and elimination of inter-entity fees 244 241 3 Equity in operations of investments $ 312 $ 788 $ (476 ) _______________ (1) Includes combined earnings and losses for Colorado Building, 1325 G Street, and Paces West, a property in which we owned a 10% interest during the six months ended June 30, 2015. Paces West was sold on November 30, 2015. Colorado Building and 1325 G Street were included as unconsolidated entities beginning on June 30, 2015.

Derivative Instruments and He25

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table summarizes the notional values of our derivative financial instruments (in thousands) as of June 30, 2016 . The notional values provide an indication of the extent of our involvement in these instruments at June 30, 2016 , but do not represent exposure to credit, interest rate, or market risks. Type/Description Notional Value Index Strike Rate Effective Date Maturity Date Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.6775 % 12/31/14 10/31/19 Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.6935 % 04/30/15 10/31/19 Interest rate swap - cash flow hedge $ 125,000 one-month LIBOR 1.7615 % 06/30/15 05/31/22 Interest rate swap - cash flow hedge $ 150,000 one-month LIBOR 1.7695 % 06/30/15 05/31/22
Schedule of fair value of derivative financial instruments included in other liabilities	The table below presents the fair value of our derivative financial instruments, included in “other liabilities” on our condensed consolidated balance sheets, as of June 30, 2016 , and December 31, 2015 (in thousands): Derivatives designated as hedging instruments: Derivative Liabilities June 30, December 31, Interest rate swaps $ (21,219 ) $ (3,866 )
Schedule of effect of the change in fair value of derivative financial instruments in statement of operations and comprehensive income (loss)	The tables below present the effect of the change in fair value of derivative financial instruments in our condensed consolidated statements of operations and comprehensive income (loss) for the six months ended June 30, 2016 and 2015 (in thousands): Derivatives in Cash Flow Hedging Relationship Gain (loss) recognized in OCI on derivatives (effective portion) Three Months Ended Six Months Ended June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest rate swaps $ (2,532 ) $ 6,146 $ (15,412 ) $ 1,590 Amount reclassified from OCI into income (effective portion) Three Months Ended Six Months Ended Location June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest expense (1) $ 1,707 $ 809 $ 3,429 $ 1,280 ______________ (1) Increases in fair value as a result of accrued interest associated with our swap transactions are recorded in accumulated OCI and subsequently reclassified into income. Such amounts are shown net in the statements of changes in equity and offset dollar for dollar. Amount recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Three Months Ended Six Months Ended Location June 30, 2016 June 30, 2015 June 30, 2016 June 30, 2015 Interest expense (1) $ 1,941 $ — $ 1,941 $ — _____________ (1) Represents the portion of the change in fair value of our interest rate swaps attributable to the mismatch between an interest rate floor on our hedged debt and no floor on the index rate in our interest rate swaps which causes hedge ineffectiveness.

Notes Payable (Tables)

Notes Payable (Tables)	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-Term Debt Maturities	The following table provides information regarding the timing of principal payments of our notes payable, net as of June 30, 2016 (in thousands): Principal payments due in: July 2016 - December 2016 $ 112,951 2017 130,021 2018 1,622 2019 301,723 2020 1,814 Thereafter 361,474 Less: unamortized debt issuance costs (1) (8,310 ) Notes payable, net $ 901,295 ________________ (1) Excludes approximately $3.0 million of unamortized debt issuance costs associated with the revolving line of credit because these costs are presented as an asset on our condensed consolidated balance sheets.

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Schedule of Restricted Stock Units	The following is a summary of the number of outstanding RSUs held by our independent directors as of June 30, 2016 and 2015 : June 30, 2016 June 30, 2015 Units Weighted Average Price per unit Units Weighted Average Price per unit Outstanding at the beginning of the year 28,705 $ 18.29 13,841 $ 24.69 Issued 18,275 $ 15.05 — $ — Forfeited — $ — (2 ) $ 24.82 Converted (7,725 ) $ 19.96 (2,078 ) $ 24.06 Outstanding at the end of the period (1) 39,255 $ 16.45 11,761 $ 24.80 _____________ (1) As of June 30, 2016 , 6,046 RSUs are vested.
Summary of Restricted Stock Valuation Assumptions	Expense is measured at the grant date, based on the estimated fair value of the award ( $19.18 per unit) as determined by a Monte Carlo simulation based model using the following assumptions: Assumption Value Expected volatility 24% Risk-free interest rate 1.15% Expected term 35 months Expected dividend yield 4.5%
Summary of the Number of Shares of Restricted Stock Outstanding	The following is a summary of the number of shares of restricted stock outstanding as of June 30, 2016 and 2015 : June 30, 2016 June 30, 2015 Shares Weighted Average Price per share Shares Weighted Average Price per share Outstanding at the beginning of the year 281,905 $ 22.46 118,563 $ 24.73 Issued 119,523 $ 15.19 106,811 $ 26.88 Forfeiture (8,406 ) $ 19.98 (10 ) $ 25.30 Restrictions lapsed (59,673 ) $ 25.64 (33,726 ) $ 24.65 Outstanding at the end of the period 333,349 $ 19.34 191,638 $ 25.94
Schedule of Distributions Declared	The following table reflects the distributions declared for our common stock, Series A Convertible Preferred Stock, and noncontrolling interests (OP units and vested restricted stock units) during the six months ended June 30, 2016 and for the year ended December 31, 2015 (in thousands). Common Stockholders Preferred Stockholders Noncontrolling Interests Total 2016 1st Quarter $ 8,600 $ 8,594 $ — $ 6 2nd Quarter 8,601 8,594 — 7 Total $ 17,201 $ 17,188 $ — $ 13 2015 1st Quarter $ — $ — $ — $ — 2nd Quarter 9,028 9,011 2 15 3rd Quarter 8,556 8,539 2 15 4th Quarter 8,596 8,576 2 18 Total $ 26,180 $ 26,126 $ 6 $ 48

Supplemental Cash Flow Inform28

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2016
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental cash flow information	Supplemental cash flow information is summarized below for the six months ended June 30, 2016 and 2015 (in thousands): Six Months Ended June 30, 2016 June 30, 2015 Interest paid, net of amounts capitalized $ 19,742 $ 31,668 Income taxes paid $ 1,964 $ 936 Non-cash investing activities: Property and equipment additions in accounts payable and accrued liabilities $ 12,016 $ 13,295 Amortization of deferred financing fees in building and improvements, net $ — $ 165 Non-cash financing activities: Cancellation of Series A Convertible Preferred Stock $ 2,700 $ — Mortgage notes assumed by purchaser $ — $ 47,074 Financing costs in accounts payable and accrued liabilities $ — $ 55 Unrealized gain on interest rate derivatives $ — $ 1,590 Unrealized loss on interest rate derivatives $ 15,412 $ — Accrual for distributions declared $ 8,602 $ 9,028 Contributions from noncontrolling interests $ — $ 1,000

Business (Details)

Business (Details)	Jun. 30, 2016propertymarket
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating office properties	32
Number of non-operating properties	2
Number of development properties	1
Number of markets in which the entity owns interests in properties | market	13

Basis of Presentation and Sig30

Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies (Reclassification) (Details) - Scenario, Previously Reported $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts payable	$ 0.8
Accrued liabilities	70.8
Change in accounts payable	(0.1)
Change in accrued liabilities	$ (17.5)

Basis of Presentation and Sig31

Basis of Presentation and Significant Accounting Policies (Real Estate) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Real estate properties
Net	$ 1,108,255	$ 1,348,200
Intangible assets
Net	68,338	83,548
Intangible liabilities
Net	(8,961)	(11,934)
Other Lease Intangibles
Intangible assets
Cost	138,703	164,636
Less: accumulated depreciation and amortization	(71,501)	(82,476)
Net	67,202	82,160
Acquired Above-Market Leases
Intangible assets
Cost	5,052	5,383
Less: accumulated depreciation and amortization	(3,916)	(3,995)
Net	1,136	1,388
Acquired Below-Market Leases
Intangible liabilities
Cost	(44,122)	(52,744)
Less: accumulated depreciation and amortization	35,161	40,810
Net	(8,961)	(11,934)
Anticipated Amortization Associated with Acquired Lease Intangibles
Anticipated Amortization Associated with the Acquired Lease Intangibles for Each of the Following Five Years
July 2016 - December 2016	1,822
2,017	1,926
2,018	1,108
2,019	1,002
2,020	1,092
Buildings and Improvements
Real estate properties
Cost	1,643,191	1,914,664
Less: accumulated depreciation and amortization	(534,936)	(566,464)
Net	$ 1,108,255	$ 1,348,200

Basis of Presentation and Sig32

Basis of Presentation and Significant Accounting Policies (Impairment of Real Estate Related Assets) (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charges	$ 4,826,000	$ 132,000	$ 100,000
Unconsolidated entities
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charges	$ 0	$ 0

Basis of Presentation and Sig33

Basis of Presentation and Significant Accounting Policies (Accounts Receivable, net) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts Receivable, Net [Abstract]
Straight-line rental revenue receivable	$ 63,951	$ 73,420
Tenant receivables	4,977	5,972
Non-tenant receivables	582	1,549
Allowance for doubtful accounts	(3,182)	(4,713)
Total	$ 66,328	$ 76,228

Basis of Presentation and Sig34

Basis of Presentation and Significant Accounts Policies (Investments in Unconsolidated Entities) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Investments in Unconsolidated Entities [Line Items]
Interest costs capitalized	$ 100,000	$ 600,000
Unconsolidated Entity
Investments in Unconsolidated Entities [Line Items]
Interest costs capitalized	$ 300,000	$ 0

Basis of Presentation and Sig35

Basis of Presentation and Significant Accounting Policies (Other Intangible Assets, net) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Intangible Assets, Net [Abstract]
Cost	$ 11,177	$ 11,177
Less: accumulated amortization	(1,290)	(1,091)
Net	$ 9,887	$ 10,086

Basis of Presentation and Sig36

Basis of Presentation and Significant Accounting Policies (Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue Recognition [Abstract]
Net increase in rental revenues due to straight-line rent adjustments	$ 1,300	$ 4,300	$ 3,800	$ 7,100
Deferred Revenue, Revenue Recognized	900	600	1,900	1,000
Net increase in rental revenue due to amortization of above- and below-market leases	1,100	1,300	2,463	2,522
Lease termination fee revenue	$ 700	$ 100	$ 1,300	$ 700

New Accounting Pronouncements (

New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Net deferred financing fees	$ 8,310	$ 8,854
Deferred financing fees, net	$ 2,999	3,111
Revolving Credit Facility
Debt Instrument [Line Items]
Deferred financing fees, net		3,100
Deferred Financing Fees, Net | Accounting Standard Update 2015-03
Debt Instrument [Line Items]
Net deferred financing fees		(8,900)
Notes Payable | Accounting Standard Update 2015-03
Debt Instrument [Line Items]
Net deferred financing fees		$ 8,900

Fair Value Measurements (Financ

Fair Value Measurements (Financial Liabilites Measured at Fair Value on a Recurring Basis) (Details) - Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Quoted Prices In Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	(21,219)	(3,866)
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	0	0
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$ (21,219)	$ (3,866)

Fair Value Measurements (Assets

Fair Value Measurements (Assets Measured at Fair Value and Impaired) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value Measurements
Asset impairment gains (losses)	$ (4,826)	$ (132)	$ (100)
Real estate
Fair Value Measurements
Impairment of Real Estate	(4,826)		(132)
Real estate | Fair Value
Fair Value Measurements
Assets, Fair Value Disclosure, Nonrecurring	5,488		11,489
Real estate | Quoted Prices In Active Markets for Identical Items (Level 1) | Fair Value
Fair Value Measurements
Assets, Fair Value Disclosure, Nonrecurring	0		0
Real estate | Significant Other Observable Inputs (Level 2) | Fair Value
Fair Value Measurements
Assets, Fair Value Disclosure, Nonrecurring	0		11,489
Real estate | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Fair Value Measurements
Fair Value of Assets at Impairment	5,488
Real estate | Significant Unobservable Inputs (Level 3) | Fair Value
Fair Value Measurements
Assets, Fair Value Disclosure, Nonrecurring	$ 5,488		$ 0
Discounted Cash Flow Technique | Real estate | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Fair Value Measurements
Discount rate	9.00%
Terminal capitalization rate	7.50%

Fair Value Measurement (Financi

Fair Value Measurement (Financial Instruments not Reported at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Less: unamortized debt issuance costs	$ (8,310)	$ (8,854)
Notes payable, net	901,295	1,071,571
Carrying Amount | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	909,605	1,080,425
Fair Value | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	$ 914,277	$ 1,084,625

Real Estate Activities (Sales o

Real Estate Activities (Sales of Real Estate Reported in Continuing Operations) (Details) ft² in Thousands	Jun. 17, 2016USD ($)ft²	Mar. 01, 2016USD ($)ft²	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale					$ 250,269,000	$ 392,648,000
Not Discontinued Operations | FOUR40
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract sale price	$ 191,000,000
Proceeds from sale	$ 189,100,000
Rentable square feet (in square feet) | ft²	1,000
Not Discontinued Operations | Lawson Commons
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contract sale price		$ 68,400,000
Proceeds from sale		$ 60,900,000
Rentable square feet (in square feet) | ft²		436
Contribution to net income (loss)			$ (800,000)	$ (1,400,000)	$ (1,400,000)	$ (3,100,000)
Maximum | Not Discontinued Operations | FOUR40
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration based upon future performance of the property	$ 12,500,000

Real Estate Activities (Sales42

Real Estate Activities (Sales of Real Estate Reported in Discontinued Operations (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)property	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)property	Jun. 30, 2015USD ($)property	Dec. 31, 2014property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | property	32		32
Income (loss) from discontinued operations	$ 0	$ (121)	$ 0	$ 1,369
Gain on sale of discontinued operations	0	6,077	0	14,683
Discontinued operations	$ 0	5,956	$ 0	$ 16,052
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | property					2
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold and classified as discontinued operations | property			0	2
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental revenue		(124)		$ 4,566
Property operating expenses		22		1,723
Interest expense		44		720
Real estate taxes		(83)		633
Property management fees		14		121
Total expenses		(3)		3,197
Income (loss) from discontinued operations		(121)		1,369
Gain on sale of discontinued operations		6,077		14,683
Discontinued operations		$ 5,956		$ 16,052

Investments in Unconsolidated43

Investments in Unconsolidated Entities (Summary of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments in Unconsolidated Entities [Line Items]
Amount of investment	$ 77,606	$ 88,998
Total assets	$ 492,159	$ 474,726
Wanamaker Building
Investments in Unconsolidated Entities [Line Items]
Ownership interest	60.00%	60.00%
Amount of investment	$ 43,726	$ 42,898
Total assets	$ 161,959	$ 162,115
Domain 2 & 7
Investments in Unconsolidated Entities [Line Items]
Ownership interest	49.84%	49.84%
Amount of investment	$ 10,937	$ 26,588
Domain 8
Investments in Unconsolidated Entities [Line Items]
Ownership interest	50.00%	50.00%
Amount of investment	$ 17,749	$ 14,193
Colorado Building
Investments in Unconsolidated Entities [Line Items]
Ownership interest	10.00%	10.00%
Amount of investment	$ 878	$ 949
1325 G Street
Investments in Unconsolidated Entities [Line Items]
Ownership interest	10.00%	10.00%
Amount of investment	$ 4,316	$ 4,370
Minimum
Investments in Unconsolidated Entities [Line Items]
Percentage of ownership vote needed for major decision	70.00%
Maximum
Investments in Unconsolidated Entities [Line Items]
Percentage of ownership vote needed for major decision	75.00%
Variable Interest Entity, Not Primary Beneficiary
Investments in Unconsolidated Entities [Line Items]
Maximum amount due for development of Domain 8	$ 300
Total assets	330,200
Total liabilities	$ 230,900

Investments in Unconsolidated44

Investments in Unconsolidated Entities (Summarized Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets
Real estate, net	$ 396,381	$ 379,646
Real estate intangibles, net	50,044	54,470
Cash, cash equivalents and restricted cash	23,815	23,814
Other assets	21,919	16,796
Total assets	492,159	474,726
Liabilities and Equity
Notes payable, net	285,851	246,500
Accounts payable	10,183	8,187
Other liabilities	14,888	19,144
Equity	181,237	200,895
Total liabilities and equity	492,159	474,726
Company’s share of equity	70,449	81,982
Basis differences	7,157	7,016
Carrying value of the Company’s investment in unconsolidated entities	77,606	88,998
Wanamaker Building
Assets
Real estate, net	127,402	128,358
Real estate intangibles, net	11,234	12,087
Cash, cash equivalents and restricted cash	12,350	12,819
Other assets	10,973	8,851
Total assets	161,959	162,115
Liabilities and Equity
Notes payable, net	73,818	75,124
Accounts payable	510	21
Other liabilities	5,668	6,386
Equity	81,963	80,584
Total liabilities and equity	161,959	162,115
Company’s share of equity	49,178	48,350
Basis differences	(5,452)	(5,452)
Carrying value of the Company’s investment in unconsolidated entities	43,726	42,898
Other (50% or less owned entities)
Assets
Real estate, net	268,979	251,288
Real estate intangibles, net	38,810	42,383
Cash, cash equivalents and restricted cash	11,465	10,995
Other assets	10,946	7,945
Total assets	330,200	312,611
Liabilities and Equity
Notes payable, net	212,033	171,376
Accounts payable	9,673	8,166
Other liabilities	9,220	12,758
Equity	99,274	120,311
Total liabilities and equity	330,200	312,611
Company’s share of equity	21,271	33,632
Basis differences	12,609	12,468
Carrying value of the Company’s investment in unconsolidated entities	$ 33,880	$ 46,100

Investments in Unconsolidated45

Investments in Unconsolidated Entities (Summarized Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenue	$ 14,866	$ 10,207	$ 28,459	$ 19,689
Income from continuing operations	1,323	(3,779)	1,155	(3,875)
Net income	1,323	(3,779)	1,155	(3,875)
Company’s share of net income (loss) from continuing operations	818	(58)	1,244	68
Basis differences and elimination of inter-entity fees	5	127	(6)	244
Equity in operations of investments	823	69	1,238	312
Wanamaker Building
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenue	6,842	6,663	13,147	12,954
Income from continuing operations	1,045	640	1,879	911
Net income	1,045	640	1,879	911
Company’s share of net income (loss) from continuing operations	627	384	1,128	547
Basis differences and elimination of inter-entity fees	135	125	255	241
Equity in operations of investments	$ 762	509	$ 1,383	788
Ownership interest	60.00%		60.00%		60.00%
Other (50% or less owned entities)
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenue	$ 8,024	3,544	$ 15,312	6,735
Income from continuing operations	278	(4,419)	(724)	(4,786)
Net income	278	(4,419)	(724)	(4,786)
Company’s share of net income (loss) from continuing operations	191	(442)	116	(479)
Basis differences and elimination of inter-entity fees	(130)	2	(261)	3
Equity in operations of investments	$ 61	$ (440)	$ (145)	$ (476)
Paces West Atlanta Ga
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Ownership interest		10.00%		10.00%

Real Estate Under Development (

Real Estate Under Development (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Real Estate Under Development [Abstract]
Development costs capitalized	$ 3.8	$ 5.2
Interest costs capitalized	$ 0.1	$ 0.6

Derivative Instruments and He47

Derivative Instruments and Hedging Activities (Notional Values of Derivative Financial Instruments) (Details)	Jun. 30, 2016USD ($)
Derivative [Line Items]
Notional Value	$ 525,000,000
Swap Number One
Derivative [Line Items]
Notional Value	$ 125,000,000
Strike Rate	1.6775%
Swap Number Two
Derivative [Line Items]
Notional Value	$ 125,000,000
Strike Rate	1.6935%
Swap Number Three
Derivative [Line Items]
Notional Value	$ 125,000,000
Strike Rate	1.7615%
Swap Number Four
Derivative [Line Items]
Notional Value	$ 150,000,000
Strike Rate	1.7695%

Derivative Instruments and He48

Derivative Instruments and Hedging Activities (Fair Value of Derivative Financial Instruments Included in Other Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Derivative Liabilities	$ (21,219)	$ (3,866)

Derivative Instruments and He49

Derivative Instruments and Hedging Activities (Derivatives in Cash Flow Hedging Relationship) (Details) - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in OCI on derivative (effective portion)	$ (2,532)	$ 6,146	$ (15,412)	$ 1,590
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from OCI into income (effective portion)	1,707	809	3,429	1,280
Amount recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	$ 1,941	$ 0	$ 1,941	$ 0

Derivative Instruments and He50

Derivative Instruments and Hedging Activities (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016USD ($)
Debt Instrument, by Type [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 6.5
Derivative, Net Liability Position, Aggregate Fair Value	22.1
Derivative, Termination value	$ 22.1
Period Over Which Default Must be Remedied	30 days
Recourse Debt
Debt Instrument, by Type [Line Items]
Minimum amount of debt default that could cause derivative obligations to also be in default	$ 10
Non-Recourse Debt
Debt Instrument, by Type [Line Items]
Minimum amount of debt default that could cause derivative obligations to also be in default	$ 75

Notes Payable (Narrative) (Deta

Notes Payable (Narrative) (Details)	1 Months Ended	6 Months Ended
	Aug. 08, 2016USD ($)	Jun. 30, 2016USD ($)property	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Notes payable, net		$ 901,295,000		$ 1,071,571,000
Notes payable, net secured by real estate assets		333,700,000
Carrying value of real estate securing notes payable		$ 333,000,000
Number of properties with mezzanine financing | property		1
Default interest rate		5.00%
Increase in interest expense for loans that are in default		$ 1,200,000
Net deferred financing fees		8,310,000		8,854,000
Deferred financing fees, net		$ 2,999,000		3,111,000
Line of credit, maximum borrowing capacity			$ 860,000,000
Revolving loan extension period		1 year
LIBOR interest index Period One		1 month
LIBOR interest index Period Two		3 months
LIBOR Interest Index Period Three		6 months
Amount of borrowings with risk managed by hedged interest rates		$ 525,000,000
Available additional borrowings		$ 126,400,000
Weighted average interest rate for borrowings under the credit facility		3.33%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Deferred financing fees, net		$ 3,000,000		3,100,000
Minimum
Line of Credit Facility [Line Items]
Line of credit, applicable margin		0.35%
Maximum
Line of Credit Facility [Line Items]
Line of credit, applicable margin		2.50%
Mezzanine Loan
Line of Credit Facility [Line Items]
Stated annual interest rate		9.80%
Notes payable
Line of Credit Facility [Line Items]
Notes payable, net		$ 901,295,000
Debt bearing interest at variable rates		$ 50,000,000
Weighted average interest rate for consolidated debt		4.27%
Effective average interest rate overall after effect of default interest		4.54%
Net deferred financing fees		$ 8,310,000		$ 8,900,000
Notes payable | Minimum
Line of Credit Facility [Line Items]
Stated annual interest rate		1.96%
Notes payable | Maximum
Line of Credit Facility [Line Items]
Stated annual interest rate		6.09%
Fifth Third Center - Columbus Oh
Line of Credit Facility [Line Items]
Carrying value of real estate securing notes payable		$ 34,800,000
Outstanding balance of non-recourse property loan in default		48,700,000
Term Loan Facility
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		300,000,000
Second Term Loan Facility
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		275,000,000
Term Loan Facility and Second Term Loan Facility
Line of Credit Facility [Line Items]
Borrowings outstanding		575,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		285,000,000
Borrowings outstanding		$ 0
Federal Funds Effective Rate | Line of Credit
Line of Credit Facility [Line Items]
Applicable margin (as a percent)		0.50%
Debt Instrument Variable Rate Base Libor | Line of Credit
Line of Credit Facility [Line Items]
Applicable margin (as a percent)		1.00%
Subsequent Event
Line of Credit Facility [Line Items]
Repayment of secured debt	$ 62,800,000

Notes Payable (Schedule of Long

Notes Payable (Schedule of Long-Term Debt Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Principal payments due in:
Less: unamortized debt issuance costs	$ (8,310)	$ (8,854)
Notes payable, net	901,295	1,071,571
Deferred financing fees, net	2,999	3,111
Notes payable
Principal payments due in:
July 2016 - December 2016	112,951
2,017	130,021
2,018	1,622
2,019	301,723
2,020	1,814
Thereafter	361,474
Less: unamortized debt issuance costs	(8,310)	(8,900)
Notes payable, net	901,295
Revolving Credit Facility
Principal payments due in:
Deferred financing fees, net	$ 3,000	$ 3,100

Equity (Series A Convertible Pr

Equity (Series A Convertible Preferred Stock) (Details) - shares	Mar. 02, 2016	Dec. 31, 2015
Subsidiary or Equity Method Investee [Line Items]
Common stock issued (in shares)	0
Behringer Harvard Reit I Services Holdings Llc
Subsidiary or Equity Method Investee [Line Items]
Series A participating, voting, and convertible preferred stock outstanding shares (in shares)		10,000

Equity (Stock Options) (Detail

Equity (Stock Options) (Details) - Independent Directors - Equity Option	Jun. 30, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options (in shares) | shares	12,495
Weighted average exercise price (in dollars per share) | $ / shares	$ 40.13

Equity (Restricted Stock Units)

Equity (Restricted Stock Units) (Details)	Jan. 26, 2016Metric$ / sharesshares	Jun. 30, 2016$ / sharesshares	Jun. 30, 2015$ / sharesshares
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Restricted stock units, vested (in units)		6,046
Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units, vesting period		13 months
Directors | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at the beginning of the year (in units)		28,705	13,841
Issued (in units)		18,275	0
Forfeited (in units)		0	(2)
Converted (in units)		(7,725)	(2,078)
Outstanding at the end of the year (in units)		39,255	11,761
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average price per unit, outstanding at the beginning of the year (in dollars per unit) | $ / shares		$ 18.29	$ 24.69
Weighted average price per unit, issued (in dollars per unit) | $ / shares		15.05	0
Weighted average price per unit, forfeited (in dollars per unit) | $ / shares		0	24.82
Weighted average price per unit, converted (in dollars per unit) | $ / shares		19.96	24.06
Weighted average price per unit, outstanding at the end of the year (in dollars per unit) | $ / shares		$ 16.45	$ 24.80
Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Issued (in units)	111,063
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average price per unit, issued (in dollars per unit) | $ / shares	$ 15.26
Number of metrics used to compare annualized total stockholder return to | Metric	3
Estimated fair value of award determined by Monte Carlo model (in dollars per unit) | $ / shares	$ 19.18
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	24.00%
Risk-free interest rate	1.15%
Expected term	35 months
Expected dividend yield	4.50%
Minimum | Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Number of common stock shares that restricted stock units can be converted to (in shares)		0
Maximum | Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Number of common stock shares that restricted stock units can be converted to (in shares)		222,126

Equity (Restricted Stock) (Deta

Equity (Restricted Stock) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of restrictions that lapse			25.00%
Number of years over which restrictions lapse			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Compensation expense related to the amortization of all equity-based incentive awards	$ 1.1	$ 0.6	$ 2	$ 1.1
Total remaining compensation cost on unvested awards	$ 5.8		$ 5.8
Compensation cost not yet recognized, unvested awards, period for recognition			1 year 9 months 6 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at the beginning of the year (in units)			281,905	118,563
Issued (in units)			119,523	106,811
Forfeiture (in shares)			(8,406)	(10)
Restrictions lapsed (in units)			(59,673)	(33,726)
Outstanding at the end of the year (in units)	333,349	191,638	333,349	191,638
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average price per unit, outstanding at the beginning of the year (in dollars per unit)			$ 22.46	$ 24.73
Weighted average price per unit, issues (in dollars per unit)			15.19	26.88
Weighted average price per unit, forfeited (in dollars per unit)			19.98	25.30
Weighted average price per unit, restrictions lapsed (in dollars per unit)			25.64	24.65
Weighted average price per unit, outstanding at the end of the year (in dollars per unit)	$ 19.34	$ 25.94	$ 19.34	$ 25.94
Tranche One | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage, restricted stock			33.33%
Tranche Two | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage, restricted stock			33.33%
Tranche Three | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage, restricted stock			33.33%

Equity (Distributions) (Details

Equity (Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended		12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity [Abstract]
Distributions declared per common share (in dollars per share)	$ 0.18				$ 0.18		$ 0.36	$ 0.18
Total	$ 8,601	$ 8,600	$ 8,596	$ 8,556	$ 9,028	$ 0	$ 17,201		$ 26,180
Distributions declared, common stockholders	8,594	8,594	8,576	8,539	9,011	0	17,188	$ 9,011	26,126
Distributions declared, preferred stockholders	0	0	2	2	2	0	0	2	6
Distributions declared, noncontrolling interests	$ 7	$ 6	$ 18	$ 15	$ 15	$ 0	$ 13	$ 15	$ 48

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016USD ($)executive
Commitments and contingencies
Number of executives | executive	5
Period of automatic continuation of term of employment	1 year
Notice period for non-renewal of term prior to the expiration of the initial term	60 days
Commitments for future tenant improvements and leasing commissions
Commitments and contingencies
Future tenant improvements and leasing commissions	$ 31.7
Employment Agreements
Commitments and contingencies
Compensation expense if termination of employment without cause	$ 13.6

Supplemental Cash Flow Inform59

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Interest paid, net of amounts capitalized	$ 19,742	$ 31,668
Income taxes paid	1,964	936
Non-cash investing activities:
Property and equipment additions in accounts payable and accrued liabilities	12,016	13,295
Amortization of deferred financing fees in building and improvements, net	0	165
Non-cash financing activities:
Cancellation of Series A Convertible Preferred Stock	2,700	0
Mortgage notes assumed by purchaser	0	47,074
Financing costs in accounts payable and accrued liabilities	0	55
Unrealized gain on interest rate derivatives	0	1,590
Unrealized loss on interest rate derivatives	15,412	0
Accrual for distributions declared	8,602	9,028
Contributions from noncontrolling interests	$ 0	$ 1,000