Tier Reit (TIER) 10-K 11 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 28, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	TIER REIT INC
Entity Central Index Key	1176373
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$1.30
Entity Common Stock, Shares Outstanding		300,555,965
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Real estate
Land	$286,430	$317,632
Buildings and improvements, net	1,482,336	1,668,799
Real estate under development	0	51,144
Total real estate	1,768,766	2,037,575
Cash and cash equivalents	31,442	57,786
Restricted cash	35,324	49,719
Accounts receivable, net	83,380	97,184
Prepaid expenses and other assets	7,129	5,594
Investments in unconsolidated entities	39,885	41,762
Deferred financing fees, net	10,783	9,978
Lease intangibles, net	94,690	134,364
Other intangible assets, net	2,144	2,263
Assets associated with real estate held for sale	137,640	0
Total assets	2,211,183	2,436,225
Liabilities
Notes payable	1,194,085	1,490,367
Accounts payable	2,790	7,305
Payables to related parties	2,041	2,034
Acquired below-market leases, net	16,984	24,570
Accrued liabilities	77,375	89,767
Other liabilities	21,405	18,923
Obligations associated with real estate held for sale	108,343	0
Total liabilities	1,423,023	1,632,966
Commitments and contingencies
Series A Convertible Preferred Stock	4,626	2,700
Equity
Preferred stock, $.0001 par value per share; 17,490,000 shares authorized, 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, 299,264,100 and 299,191,861 shares issued and outstanding at December 31, 2014 and 2013, respectively	30	30
Additional paid-in capital	2,645,902	2,646,741
Cumulative distributions and net loss attributable to common stockholders	-1,862,555	-1,847,039
Accumulated other comprehensive loss	-788	0
Stockholders’ equity	782,589	799,732
Noncontrolling interests	945	827
Total equity	783,534	800,559
Total liabilities and equity	$2,211,183	$2,436,225

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred Stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	17,490,000	17,490,000
Preferred stock, shares outstanding	0	0
Convertible stock, par value (in dollars per share)	$0.00	$0.00
Convertible stock, shares authorized	1,000	1,000
Convertible stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	382,499,000	382,499,000
Common stock, shares issued	299,264,100	299,191,861
Common stock, shares outstanding	299,264,100	299,191,861

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Rental revenue	$281,142	$282,071	$289,466
Expenses
Property operating expenses	92,734	88,722	88,730
Interest expense	64,359	85,714	96,794
Real estate taxes	40,621	41,075	38,605
Property management fees	8,439	8,488	8,664
Asset management fees	0	0	6,656
Asset impairment losses	4,940	0	72,054
General and administrative	19,058	17,322	15,480
Depreciation and amortization	116,970	118,880	126,126
Total expenses	347,121	360,201	453,109
Interest and other income	517	1,234	946
Loss on early extinguishment of debt	-426	-1,605	0
Gain on troubled debt restructuring	0	0	201
Loss from continuing operations before income taxes, equity in operations of investments, and gain on sale or transfer of assets	-65,888	-78,501	-162,496
Benefit (provision) for income taxes	28	-518	-60
Equity in earnings of investments	1,836	24,547	1,725
Loss from continuing operations before gain on sale or transfer of assets	-64,024	-54,472	-160,831
Discontinued operations
Income (loss) from discontinued operations	-41,725	13,917	-19,743
Gain on sale or transfer of discontinued operations	90,221	40,436	20,130
Income from discontinued operations	48,496	54,353	387
Gain on sale or transfer of assets	0	16,102	8,083
Net income (loss)	-15,528	15,983	-152,361
Noncontrolling interests in continuing operations	108	56	222
Noncontrolling interests in discontinued operations	-96	-487	38
Accretion of Series A Convertible Preferred Stock	-1,926	0	0
Net income (loss) attributable to common stockholders	-17,442	15,552	-152,101
Basic and diluted weighted average common shares outstanding	299,255,392	299,191,861	298,372,324
Basic and diluted income (loss) per common share:
Continuing operations	($0.22)	($0.13)	($0.51)
Discontinued operations	$0.16	$0.18	$0
Basic and diluted income (loss) per common share	($0.06)	$0.05	($0.51)
Net income (loss) attributable to common stockholders:
Continuing operations	-65,842	-38,314	-152,526
Discontinued operations	48,400	53,866	425
Net income (loss) attributable to common stockholders	-17,442	15,552	-152,101
Comprehensive income (loss):
Net income (loss)	-15,528	15,983	-152,361
Other comprehensive income (loss): unrealized gain (loss) on interest rate derivatives	-789	1,679	-772
Comprehensive income (loss)	-18,243	17,662	-153,133
Comprehensive (income) loss attributable to noncontrolling interests	13	-434	261
Comprehensive income (loss) attributable to common stockholders	($18,230)	$17,228	($152,872)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (USD $)	Total	Convertible Stock	Common Stock	Additional Paid-in Capital	Cumulative Distributions and Net Loss Attributable to Common Stockholders	Accumulated Other Comprehensive Loss	Noncontrolling Interests
In Thousands, unless otherwise specified	USD ($)		USD ($)	USD ($)	USD ($)	USD ($)	USD ($)
Balance at Dec. 31, 2011	$961,991		$30	$2,639,720	($1,683,153)	($905)	$6,299
Balance (in shares) at Dec. 31, 2011		1	297,256
Increase (Decrease) in Stockholders' Equity
Net income (loss)	-152,361				-152,101		-260
Unrealized gain (loss) on interest rate derivatives	-772					-771	-1
Redemption of common stock	-4,083			-4,083
Redemption of common stock (in shares)			-880
Share-based compensation, net	0
Cancellation of convertible stock (in shares)		-1
Distributions declared					-27,337
Distributions declared							-410
Distributions declared	-27,747
Shares issued pursuant to Distribution Reinvestment Plan	13,066		0	13,066
Shares issued pursuant to Distribution Reinvestment Plan (in shares)			2,816
Cost of share issuance	-9			-9
Issuance of Series A Convertible Preferred Stock	-2,700			-2,700
Accretion of Series A Convertible Preferred Stock	0
Balance at Dec. 31, 2012	787,385		30	2,645,994	-1,862,591	-1,676	5,628
Balance (in shares) at Dec. 31, 2012		0	299,192
Increase (Decrease) in Stockholders' Equity
Net income (loss)	15,983				15,552		431
Unrealized gain (loss) on interest rate derivatives	1,679					1,676	3
Redemption of common stock (in shares)			0
Share-based compensation, net	820			747			73
Distributions declared					0
Distributions declared							-5,308
Distributions declared	-5,308
Accretion of Series A Convertible Preferred Stock	0
Balance at Dec. 31, 2013	800,559		30	2,646,741	-1,847,039	0	827
Balance (in shares) at Dec. 31, 2013		0	299,192
Increase (Decrease) in Stockholders' Equity
Net income (loss)	-15,528				-15,516		-12
Unrealized gain (loss) on interest rate derivatives	-789					-788	-1
Share-based compensation, net	1,255			1,087			168
Share-based compensation, net (in shares)	72
Distributions declared					0
Distributions declared							-37
Distributions declared	-37
Accretion of Series A Convertible Preferred Stock	-1,926			-1,926
Balance at Dec. 31, 2014	$783,534		$30	$2,645,902	($1,862,555)	($788)	$945
Balance (in shares) at Dec. 31, 2014		0	299,264

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income (loss)	($15,528)	$15,983	($152,361)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Asset impairment losses	13,165	4,879	98,050
Gain on sale or transfer of assets	0	-16,102	-8,083
Gain on sale or transfer of discontinued operations	-90,221	-40,436	-20,130
Gain on troubled debt restructuring	0	-36,856	-35,635
Loss on early extinguishment of debt	775	2,787	0
Loss on derivatives	0	251	66
Amortization of restricted shares and units	1,397	820	0
Depreciation and amortization	143,168	171,119	195,077
Amortization of lease intangibles	-376	355	757
Amortization of above/below market rent	-4,133	-9,540	-11,741
Amortization of deferred financing and mark-to-market costs	3,088	6,308	7,569
Equity in earnings of investments	-1,836	-24,547	-1,725
Ownership portion of management and financing fees from unconsolidated entities	482	923	446
Distributions from investments	1,091	0	581
Change in accounts receivable	-8,290	-7,999	-13,632
Change in prepaid expenses and other assets	618	572	-1,945
Change in lease commissions	-21,891	-15,520	-21,942
Change in other lease intangibles	-800	-961	-2,508
Change in other intangible assets	0	0	-1,445
Change in accounts payable	-746	1,847	436
Change in accrued liabilities	391	-11,793	14,880
Change in other liabilities	4,604	2,847	1,469
Change in payables to related parties	182	214	350
Cash provided by operating activities	25,140	45,151	48,534
Cash flows from investing activities
Return of investments	2,702	36,310	2,278
Investments in unconsolidated entities	-560	-1,500	-1,330
Capital expenditures for real estate	-78,567	-66,004	-67,301
Capital expenditures for real estate under development	-27,423	-39,180	-2,065
Proceeds from sale of discontinued operations	242,800	495,866	111,142
Proceeds from sale of assets	0	0	21,235
Change in restricted cash	14,395	28,954	21,022
Cash provided by investing activities	153,347	454,446	84,981
Cash flows from financing activities
Financing costs	-5,454	-2,362	-1,550
Proceeds from notes payable	334,359	55,785	34,501
Payments on notes payable	-533,528	-499,672	-147,494
Payments on capital lease obligations	-30	0	-44
Redemptions of common stock	0	0	-4,083
Transfers of common stock	141	0	0
Offering costs	0	0	-9
Distributions to common stockholders	0	0	-16,748
Distributions to noncontrolling interests	-37	-5,308	-415
Cash used in financing activities	-204,831	-451,557	-135,842
Net change in cash and cash equivalents	-26,344	48,040	-2,327
Cash and cash equivalents at beginning of period	57,786	9,746	12,073
Cash and cash equivalents at end of period	$31,442	$57,786	$9,746

Business

Business	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business
	Organization
	TIER REIT, Inc. is a self-managed, Dallas, Texas-based real estate investment trust focused primarily on providing quality, attractive, well-managed, commercial office properties located in strategic markets throughout the United States. 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 was incorporated in June 2002 as a Maryland corporation and has elected to be taxed, and currently qualifies, as a real estate investment trust, or REIT, for federal income tax purposes.  As of December 31, 2014, we owned interests in 37 operating properties and one recently developed non-operating property located in 14 states and the District of Columbia.
	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 owning substantially all of Tier OP.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Use of Estimates in the Preparation of Financial Statements
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  These estimates include such items as the purchase price allocation for real estate acquisitions, impairment of assets, timing of asset dispositions, duration of lease terms, depreciation and amortization, and allowance for doubtful accounts.  Actual results could differ materially from those estimates.
	Principles of Consolidation and Basis of Presentation
	Our 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.  All inter-company transactions, balances, and profits have been eliminated in consolidation.  Interests in entities acquired are evaluated based on applicable GAAP which requires the consolidation of VIEs in which we are deemed to be the primary beneficiary.  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. We had no VIEs as of December 31, 2014, 2013 or 2012.
	Real Estate
	Upon the acquisition of real estate properties, we recognize the assets acquired, the liabilities assumed, and any noncontrolling interest as of the acquisition date, measured at their fair values.  The acquisition date is the date on which we obtain control of the real estate property.  The assets acquired and liabilities assumed may consist of land, inclusive of associated rights, buildings, assumed debt, identified intangible assets and liabilities, and asset retirement obligations.  Identified intangible assets generally consist of above-market leases, in-place leases, in-place tenant improvements, in-place leasing commissions, and tenant relationships.  Identified intangible liabilities generally consist of below-market leases.  Goodwill is recognized as of the acquisition date and measured as the aggregate fair value of the consideration transferred and any noncontrolling interests in the acquiree over the fair value of the identifiable net assets acquired.  Likewise, a bargain purchase gain is recognized in current earnings when the aggregate fair value of the consideration transferred and any noncontrolling interests in the acquiree is less than the fair value of the identifiable net assets acquired.  Acquisition-related costs are expensed in the period incurred. Initial valuations are subject to change until our information is finalized, which is no later than twelve months from the acquisition date.
	The fair value of the tangible assets acquired, consisting of land and buildings, is determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land and buildings.  Land values are derived from appraisals or other relevant market information available to us, and building values are calculated as replacement cost less depreciation or management’s estimates of the fair value of these assets using discounted cash flow analyses or similar methods believed to be used by market participants.  The value of buildings is depreciated over the estimated useful life of 25 years using the straight-line method.
	We determine the fair value of assumed debt by calculating the net present value of the scheduled mortgage payments using interest rates for debt with similar terms and remaining maturities that management believes we could obtain at the date of the debt assumption.  Any difference between the fair value and stated value of the assumed debt is recorded as a discount or premium and amortized over the remaining life of the loan using the effective interest method.
	We determine the value of above-market and below-market leases for acquired properties based on the present value (using an interest rate that reflects the risks associated with the leases acquired) of the difference between (1) the contractual amounts to be paid pursuant to the in-place leases and (2) management’s estimate of current market lease rates for the corresponding in-place leases, measured over a period equal to (a) the remaining non-cancelable lease term for above-market leases, or (b) the remaining non-cancelable lease term plus any below-market fixed rate renewal options that, based on a qualitative assessment of several factors, including the financial condition of the lessee, the business conditions in the industry in which the lessee operates, the economic conditions in the area in which the property is located, and the ability of the lessee to sublease the property during the renewal term, are reasonably assured to be exercised by the lessee for below-market leases.  We record the fair value of above-market and below-market leases as intangible assets or intangible liabilities, respectively, and amortize them as an adjustment to rental income over the determined lease term.
	The total value of identified real estate intangible assets acquired is further allocated to in-place leases, in-place tenant improvements, in-place leasing commissions, and tenant relationships based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant.  The aggregate value for tenant improvements and leasing commissions is based on estimates of these costs incurred at inception of the acquired leases, amortized through the date of acquisition.  The aggregate value of in-place leases acquired and tenant relationships is determined by applying a fair value model.  The estimates of fair value of in-place leases include an estimate of carrying costs during the expected lease-up periods for the respective spaces considering current market conditions.  In estimating the carrying costs that would have otherwise been incurred had the leases not been in place, we include such items as real estate taxes, insurance, and other operating expenses, as well as lost rental revenue during the expected lease-up period based on current market conditions.  The estimates of the fair value of tenant relationships also include costs to execute similar leases including leasing commissions, legal fees, and tenant improvements, as well as an estimate of the likelihood of renewal as determined by management on a tenant-by-tenant basis.
	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 initial term 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 intangibles related to that tenant would be charged to expense.
	The estimated remaining useful lives for acquired lease intangibles range from an ending date of January 2015 to an ending date of December 2030.  Anticipated amortization associated with the acquired lease intangibles for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
	2015	$	5,777
	2016	$	3,027
	2017	$	2,265
	2018	$	1,541
	2019	$	1,695
	As of December 31, 2014 and 2013, accumulated depreciation and amortization related to our consolidated real estate properties and related lease intangibles were as follows (in thousands):
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2014
	Cost		$	2,039,765			$	215,913		$	11,785		$	(59,605	)
	Less: accumulated depreciation and amortization		(557,429		)		(123,242		)	(9,766		)	42,621
	Net		$	1,482,336			$	92,671		$	2,019		$	(16,984	)
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2013
	Cost		$	2,255,384			$	305,233		$	19,264		$	(76,750	)
	Less: accumulated depreciation and amortization		(586,585		)		(177,088		)	(13,045		)	52,180
	Net		$	1,668,799			$	128,145		$	6,219		$	(24,570	)
	Real Estate Development
	We capitalize project costs related to the development and construction of real estate (including interest and related loan fees, property taxes, insurance, and other direct costs associated with the development) as a cost of the development. Indirect costs not clearly related to development and construction are expensed as incurred. Capitalization begins when we determine that the development is probable and significant development activities are underway. 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.
	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 third-party broker valuation estimates, 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 Investment Officer, and Chief Accounting Officer 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 years ended December 31, 2014, 2013 and 2012, we recorded non-cash impairment charges of approximately $13.2 million, $4.9 million and $98.1 million, respectively, related to the impairment of consolidated real estate assets, including discontinued operations.  The impairment losses recorded were primarily related to assets assessed for impairment due to changes in management’s estimates of the intended hold period for certain of our properties.
	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 years ended December 31, 2014, 2013 or 2012.
	In evaluating our investments for impairment, management makes several estimates and assumptions, including, but not limited to, the projected date of disposition 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.
	Cash and Cash Equivalents
	We consider investments in highly-liquid money market funds or investments with original maturities of three months or less to be cash equivalents.
	Restricted Cash
	Restricted cash includes restricted money market accounts, as required by our lenders or by leases, for anticipated tenant improvements, property taxes and insurance, and certain tenant security deposits for our consolidated properties, as well as cash committed as part of a sale agreement for renovations at a disposed property.
	Accounts Receivable, net
	The following is a summary of our accounts receivable as of December 31, 2014 and 2013 (in thousands):
			December 31, 2014				31-Dec-13
	Straight-line rental revenue receivable		$	73,266			$	88,370
	Tenant receivables		10,165				9,389
	Non-tenant receivables		1,150				714
	Allowance for doubtful accounts		(1,201		)		(1,289		)
	Total		$	83,380			$	97,184
	Prepaid Expenses and Other Assets
	Prepaid expenses and other assets include prepaid insurance, prepaid real estate taxes, utility and other deposits of the properties we consolidate, as well as our deferred tax assets and prepaid directors’ and officers’ insurance.
	Investments in Unconsolidated Entities
	Investments in unconsolidated entities at December 31, 2014, consist of our noncontrolling interests in the Wanamaker Building and Paces West properties.
	We account for these investments using the equity method of accounting in accordance with GAAP.  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).  We use the equity method of accounting because the shared decision-making involved in these investments creates an opportunity for us to have some influence on the operating and financial decisions of these investments and thereby creates some responsibility by us for a return on our investment.  While we own a 60% majority of the Wanamaker Building, major decisions require at least a vote of 70% of the ownership group; therefore, this investment is presented using the equity method of accounting.
	Deferred Financing Fees, net
	Deferred financing fees are recorded at cost and are amortized to interest expense using a straight-line method that approximates the effective interest method over the anticipated life of the related debt. The following is a summary of our deferred financing fees as of December 31, 2014 and 2013 (in thousands):
		December 31, 2014				December 31,
						2013
	Cost	$	24,704			$	26,044
	Less: accumulated amortization	(13,921		)		(16,066		)
	Net	$	10,783			$	9,978
Other Intangible Assets
Other intangible assets consist of an above-market ground lease on a property where a third party owns and has leased the underlying land to us. As of December 31, 2014 and 2013, the cost basis and accumulated amortization related to our consolidated other intangibles assets were as follows (in thousands):
	December 31, 2014				31-Dec-13
Cost	$	2,978			$	2,978
Less: accumulated depreciation and amortization	(834		)		(715		)
Net	$	2,144			$	2,263
We amortize the value of other intangible assets to expense over the estimated remaining useful life which has an ending date of December 2032. Anticipated amortization associated with other intangible assets for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
2015	$	119
2016	$	119
2017	$	119
2018	$	119
2019	$	119
Real Estate Held for Sale
We classify properties as held for sale when certain criteria are met, in accordance with GAAP.  At that time, we present the assets and obligations associated with the real estate held for sale separately in our consolidated balance sheet, and we cease recording depreciation and amortization expense related to that property.  Real estate held for sale is reported at the lower of its carrying amount or its estimated fair value less estimated costs to sell.  As of December 31, 2014, we had three properties classified as real estate held for sale. We had no real estate held for sale as of December 31, 2013.
Derivative Financial Instruments
We record all derivatives on the balance sheet at fair value.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.  Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges.  For derivatives designated as fair value hedges, the changes in the fair value of both the derivative instrument and the hedged items are recorded in earnings. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.  For derivatives designated as cash flow hedges, the effective portions of changes in the fair value of the derivative are reported in accumulated other comprehensive income (loss) and are subsequently reclassified into earnings when the hedged item affects earnings.  Changes in the fair value of derivative instruments not designated as hedges and ineffective portions of hedges are recognized in earnings in the affected period.  Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge.  We may enter into derivative contracts that are intended to economically hedge certain of our risk even though hedge accounting does not apply or we elect not to apply hedge accounting.
As of December 31, 2014 and 2013, we do not have any derivatives designated as fair value hedges or hedges of net investments in foreign operations, nor are derivatives being used for trading or speculative purposes.
Valuation of Series A Convertible Preferred Stock
On September 4, 2012, we issued 10,000 shares of Series A participating, voting, convertible preferred stock (the “Series A Convertible Preferred Stock”) to Behringer Harvard Services Holdings, LLC (“Services Holdings”) as described further in Footnote 12 (Equity). The shares of Series A Convertible Preferred Stock are initially recorded at fair value and classified as temporary equity, outside the stockholders’ equity section, on our consolidated balance sheets. In estimating the fair value of these shares, management considered various potential outcomes for the conversion of the shares within the context of a probability weighted expected returns model. Subsequent to the date of issuance, the Series A Convertible Preferred Stock is adjusted to its maximum redemption value at the end of each reporting period. However, to the extent that the maximum redemption value of the Series A Convertible Preferred Stock does not exceed the fair value of the shares at the date of issuance, the shares are not adjusted below the fair value at the date of issuance.
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.  The total net increase to rental revenue due to straight-line rent adjustments for the years ended December 31, 2014, 2013 and 2012, was approximately $6.4 million, $6.4 million, and $16.1 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 years ended December 31, 2014, 2013 and 2012, was approximately $4.1 million, $9.5 million, and $11.7 million, respectively. Revenue 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.  We recognized lease termination fees of approximately $2.7 million, $2.3 million, and $1.2 million for the years ended December 31, 2014, 2013 and 2012, respectively. Each of the amounts presented above include rental revenue amounts recognized in discontinued operations.
Income Taxes
We have elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), and have qualified as a REIT since the year ended December 31, 2004.  The Company is generally not subject to federal income taxes to the extent we distribute our REIT taxable income to our stockholders currently each year and we meet certain other organizational and operational requirements.  In addition to the Company, our business is conducted through our operating partnership, Tier OP, and various subsidiaries, including limited liability companies, partnerships and corporations elected to be treated as taxable REIT subsidiaries.  The Company and its subsidiaries are subject to state and local income taxes on operations located in states, cities, and other jurisdictions that impose an income tax.  In addition, our taxable REIT subsidiaries are subject to federal, state, and local income taxes at regular corporate tax rates.
Stock Based Compensation
We have a stock-based incentive award plan for our employees, independent directors, and consultants.  Compensation cost for restricted stock and restricted stock units is measured at the grant date based on the estimated fair value of the award and will be recognized as expense over the service period based on the tiered lapse schedule and estimated forfeiture rates. Stock options are granted at the fair market value on the date of grant with fair value estimated using the Black-Scholes-Merton option valuation model that incorporates assumptions surrounding volatility, distribution yield, the risk-free interest rate, expected life, and the exercise price as compared to the underlying stock price on the grant date.  Any tax benefits associated with these share-based payments are classified as financing activities in the consolidated statements of cash flows.  For the years ended December 31, 2014 and 2013, we had approximately $1.4 million and $0.8 million, respectively, in compensation costs related to share-based payments. For the year ended December 31, 2012, we had no significant compensation cost related to share-based payments.
401(k) Plan
Since August 2012 we have had a 401(k) defined contribution plan (“401(k) Plan”) for the benefit of our eligible employees. Each employee may contribute up to 100% of their annual compensation, subject to specific limitations under the Code.  Our 401(k) Plan allows us to make discretionary contributions during each plan year. For the years ended December 31, 2014 and 2013, we expensed approximately $0.2 million and $0.3 million in employer contributions, respectively.  We expensed no employer contributions for the year ended December 31, 2012.
Concentration of Credit Risk
We have cash and cash equivalents and restricted cash deposited in certain financial institutions in excess of federally insured levels.  We have diversified our accounts with several banking institutions in an attempt to minimize exposure to any one of these institutions.  We regularly monitor the financial stability of these financial institutions and believe that we are not exposed to significant credit risk in cash and cash equivalents or restricted cash.
We have properties located in Houston, Texas; Philadelphia, Pennsylvania; and Chicago, Illinois, which subject us to the business risk associated with our geographic concentration in these markets. The percentage of our total rental revenue from these markets for the years ended December 31, 2014, 2013 and 2012, are 47%, 47%, and 44%, respectively.
Noncontrolling Interests
Noncontrolling interests consists of our third-party partners’ proportionate share of equity in certain consolidated real estate properties, limited partnership units issued to third parties, and restricted stock units issued to our independent directors.
Earnings per Share
Earnings per share is calculated based on the weighted average number of common shares outstanding during each period.  Stock options, units of limited partnership interest, Series A Convertible Preferred stock, restricted stock, and restricted stock units are excluded from the calculation of earnings per share for all periods presented in this report because the effect would be anti-dilutive.  Gain on sale of assets is included in the calculation of loss from continuing operations per share in accordance with SEC guidelines.
Reportable Segments
Our current business consists of owning, operating, acquiring, developing, investing in, and disposing of real estate assets.  All of our consolidated revenues are from our consolidated real estate properties.  Our chief operating decision maker evaluates operating performance on an individual property level and views all of our real estate assets as one industry segment. Accordingly, all of our properties are aggregated into one reportable segment.
Subsequent Events
We have evaluated subsequent events for recognition or disclosure in our consolidated financial statements.

New_Accounting_Pronouncements

New Accounting Pronouncements	12 Months Ended
	Dec. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (“FASB”) issued guidance that changes the criteria for reporting a discontinued operation. Under the new guidance, only a disposal of a component that represents a major strategic shift of an organization qualifies for discontinued operations reporting. The guidance also requires expanded disclosures about discontinued operations and new disclosures in regards to individually significant disposals that do not qualify for discontinued operations reporting. This guidance is effective for the first interim or annual period beginning on or after December 15, 2014.  Early adoption is permitted, but only for disposals that have not been reported in previously-issued financial statements. Upon our adoption of this guidance on January 1, 2015, sales of our individual operating properties will generally no longer qualify as discontinued operations.
	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, 2016. We are currently evaluating the impact this guidance will have on our financial statements when adopted.
	In June 2014, the FASB issued an update which 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. We do not believe the adoption of this guidance will have a material impact on our financial statements.
	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 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. We do not believe the adoption of this guidance will 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. We are currently evaluating the impact this guidance will have on our financial statements when adopted.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
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 an 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 hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy) has been established.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	Derivative financial instruments
	We use interest rate swaps and caps 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 and caps 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 consolidated balance sheets.
	We had no interest rate swaps or caps in place at December 31, 2013. 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 December 31, 2014 (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
	Liabilities:
	Derivative financial instruments	$	(789	)	$	—		$	(789	)	$	—
	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 2014, we recorded impairment losses of approximately $13.2 million, including losses recorded as part of our discontinued operations. During 2013, we recorded impairment losses of approximately $4.9 million for a property that was disposed. We had no impairment losses for any of our assets in continuing operations during 2013.
	The following table summarizes those assets which were measured at fair value and impaired during 2014 (in thousands):
					Basis of Fair Value Measurements
	Description	Fair Value			Quoted Prices			Significant			Significant		Total
		of Assets at Impairment			In Active			Other			Unobservable		Losses
					Markets for			Observable			Inputs
					Identical Items			Inputs			(Level 3)
					(Level 1)			(Level 2)
	Real estate	$	11,489		$	—		$	11,489		$	—	$	(4,940	)
	Real estate held for sale	$	42,000		$	—		$	—		$	42,000	$	(8,225	)
	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 during the year ended December 31, 2014 (in thousands):
		Fair Value of Assets at Impairment			Valuation Technique		Unobservable Input	Range
	Real estate on which impairment losses were recognized	$	42,000		Discounted Cash Flow		Discount rate	10%
							Terminal capitalization rate	9%
							Market rent growth rate	2%
							Expense growth rate	2% to 3%
	Financial Instruments not Reported at Fair Value
	Financial instruments held at December 31, 2014 and 2013, 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, 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 and the related estimated fair value of our notes payable and our notes payable associated with real estate held for sale as of December 31, 2014 and 2013, are as follows (in thousands):
		December 31, 2014						December 31, 2013
		Carrying Amount			Fair Value			Carrying Amount			Fair Value
	Notes payable	$	1,194,085		$	1,216,991		$	1,490,367		$	1,510,691
	Notes payable associated with real estate held for sale	$	97,257		$	95,011		$	—		$	—

Real_Estate_Activities

Real Estate Activities	12 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Real Estate Activities	Real Estate Activities
	Dispositions
	The following table provides a summary of the consolidated properties we disposed of during the years ended December 31, 2014 and 2013 (in thousands):
			Date of Disposal				Rentable Square Footage (unaudited)		Contract Sales Price		Proceeds from Sale (1)
	Property Name				Location
	2014
	City Hall Plaza		9/16/14		Manchester, NH		210		$	19,750	$	19,130
	222 South Riverside Plaza (3)		12/19/14		Chicago, IL		1,184				223,670
							1,394				$	242,800
	2013
	600 & 619 Alexander Road		2/15/13		Princeton, NJ		97		$	9,600	$	9,128
	5 & 15 Wayside		3/22/13		Burlington, MA		270		$	69,321	65,652
	Riverview Tower		5/2/13		Knoxville, TN		334		$	24,250	—
	Epic Center (2)		5/13/13		Wichita, KS		289		$	—	—
	One Brittany Place (2)		5/13/13		Wichita, KS		57		$	—	—
	Two Brittany Place (2)		5/13/13		Wichita, KS		58		$	—	—
	Tice Building (2)		8/30/13		Woodcliff Lakes, NJ		120		$	—	—
	One Edgewater Plaza (2)		8/30/13		Staten Island, NY		252		$	—	—
	Energy Centre		9/12/13		New Orleans, LA		757		$	86,500	80,720
	Ashford Perimeter (2)		9/13/13		Atlanta, GA		288		$	—	—
	10 & 120 South Riverside		11/14/13		Chicago, IL		1,411		$	361,000	340,366
							3,933				$	495,866
	____________
	-1	In 2014, proceeds from sale include approximately $217.8 million in debt paid off with the proceeds of the sale of these properties. In 2013, proceeds from sale are reduced by approximately $24.3 million in debt assumed by the purchasers and includes approximately $407.0 million in debt paid off with the proceeds of the sale of these properties.
	-2	Ownership of each of these properties was transferred to the lender pursuant to a foreclosure or deed-in-lieu of foreclosure.
	-3	The contract sales price for the 222 South Riverside Plaza property was approximately $247.0 million in cash, excluding transaction costs, credits, prorations, and adjustments; plus the conveyance of the 5950 Sherry Lane property in Dallas, Texas, as described below.
	Acquisition
	On December 19, 2014, as a portion of the consideration received in the sale of 222 South Riverside Plaza, we acquired a 197,000 rentable square feet property in Dallas, Texas (“5950 Sherry Lane”), for an estimated purchase price of approximately $62.6 million. Total consideration transferred was allocated to tangible and identifiable intangible assets acquired and liabilities assumed based on their fair values at the acquisition date as set forth below (in thousands):
	Land	$	10,002
	Building and improvements	50,876
	Lease intangibles	3,809
	Acquired below-market leases	(2,109		)
	Total	$	62,578
	Our Consolidated Statements of Operations include the operations of 5950 Sherry Lane for the period from December 19, 2014 (the date of acquisition) through December 31, 2014. The following summary presents the results of operations (in thousands) for the years ended December 31, 2014 and 2013, on an unaudited pro forma basis, as if the acquisition of 5950 Sherry Lane had occurred on January 1, 2013. This pro forma condensed consolidated financial information is presented for informational purposes only and does not purport to be indicative of what our financial results would have been if the transaction reflected herein had occurred on the date set forth above or been in effect during the periods indicated, nor should it be viewed as indicative of our financial results in the future.
		Year Ended December 31,
		2014				2013
	Rental revenue	$	287,798			$	288,903
	Loss from continuing operations	$	(62,738	)		$	(52,908	)
	Net income (loss) attributable to common stockholders	$	(16,158	)		$	17,114
	Basic and diluted weighted average common shares outstanding	299,255				299,192
	Basic and diluted income (loss) per common share	$	(0.05	)		$	0.06

Investments_in_Unconsolidated_

Investments in Unconsolidated Entities	12 Months Ended
	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities
	Investments in unconsolidated entities consists of our noncontrolling interests in certain properties.  In January 2013 we sold our previously wholly-owned Paces West property to a joint venture in which we own a 10% noncontrolling interest and the property was deconsolidated. In December 2013, 200 South Wacker, a property in which we owned a noncontrolling interest, was sold to an unaffiliated third-party. The following is a summary of our investments in unconsolidated entities as of December 31, 2014 and 2013 (in thousands):
		Ownership Interest
	Property Name	December 31, 2014	31-Dec-13	December 31, 2014		31-Dec-13
	Wanamaker Building	60.00%	60.00%	$	38,609	$	39,229
	200 South Wacker (1)	0.00%	9.87%	—		1,495
	Paces West	10.00%	10.00%	1,276		1,038
	Total			$	39,885	$	41,762
	_________________
	(1) As a result of the sale of this property in December 2013, based on the operating agreement, our economic interest was promoted to 30%.
	For the year ended December 31, 2014, we recorded approximately $1.8 million of equity in earnings and approximately $3.8 million of distributions from our investments in unconsolidated entities. For the year ended December 31, 2013, we recorded approximately $24.5 million of equity in earnings and approximately $36.3 million of distributions from our investments in unconsolidated entities, which included approximately $25.1 million from the gain on the 2013 sale of 200 South Wacker.

Real_Estate_Under_Development

Real Estate Under Development	12 Months Ended
	Dec. 31, 2014
Real Estate Under Development [Abstract]
Real Estate Under Development	Real Estate Under Development
	We capitalize interest, property taxes, insurance, and direct construction costs on our real estate under development, which includes the development of a new commercial office building located at 2050 W. Sam Houston Parkway in Houston, Texas (“Two BriarLake Plaza”). For the year ended December 31, 2014, we capitalized a total of approximately $27.0 million for the development of Two BriarLake Plaza, including approximately $2.5 million in interest. For the year ended December 31, 2013, we capitalized a total of approximately $45.2 million for the development of Two BriarLake Plaza, including approximately $1.1 million in interest. We completed the major construction activity of Two BriarLake Plaza in the third quarter of 2014, and the property was classified within “land” and “buildings and improvements, net” on our consolidated balance sheet at that time. Tenant improvements are ongoing and the building is not yet held as fully available for occupancy as of December 31, 2014. We have a construction loan that will provide up to $66.0 million in available borrowings for the development. As of December 31, 2014, approximately $45.9 million has been drawn on the construction loan.

Leasing_Activity

Leasing Activity	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leasing Activity	Leasing Activity
	As Lessor
	Future minimum base rental payments due to us under non-cancelable leases in effect as of December 31, 2014, for operating properties we consolidate, excluding real estate held for sale, are as follows (in thousands):
	Year	Amount
	2015	$	194,041
	2016	180,469
	2017	159,764
	2018	139,542
	2019	110,050
	Thereafter	297,766
	Total	$	1,081,632
	As Lessee
	We have land that is subject to long-term ground leases and we lease office space, parking space, and equipment. Total rent expense for the years ended December 31, 2014, 2013 and 2012, was approximately $2.3 million, $1.2 million and $1.1 million, respectively. Future minimum base rental payments payable by us under these non-cancelable leases are as follows (in thousands):
	Year	Amount
	2015	$	2,223
	2016	2,197
	2017	1,737
	2018	1,433
	2019	982
	Thereafter	19,884
	Total	$	28,456

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	We elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), and have qualified as a REIT since the year ended December 31, 2004.  The Company is generally not subject to federal income taxes to the extent we distribute our REIT taxable income to our stockholders currently each year and we meet certain other organizational and operational requirements.
	Substantially all of our business is conducted through our operating partnership, Tier OP, and various subsidiaries, including limited liability companies (“LLCs”), partnerships and corporations elected to be treated as taxable REIT subsidiaries. One of our subsidiaries, IPC (US), LLC, is the successor entity to IPC (US), Inc., which we acquired on December 12, 2007, and elected to treat as a separate, subsidiary REIT beginning with the tax year ended December 31, 2008. On December 31, 2013, in an effort to eliminate duplicative efforts and simplify the overall structure of our business, we converted IPC (US), Inc. into IPC (US), LLC, and in so doing, we ceased the treatment of IPC (US), Inc. as a separate, subsidiary REIT and began treating IPC (US), LLC as a single-member LLC that is disregarded for federal income tax purposes from our parent REIT. Since the conversion took place more than five years subsequent to our acquisition of IPC (US), Inc., and in a year in which the normal ten year built-in gains tax lockout period was temporarily reduced to five years, no built-in gain taxes resulted from the conversion. The conversion produced capital losses in excess of capital gains by approximately $223.1 million, which can be carried forward for up to five years and used to offset capital gains for federal income tax purposes. In addition, the conversion caused the forfeiture of approximately $55.8 million of net operating losses (“NOLs”) that were incurred by IPC (US), Inc. prior to our acquisition. As these NOLs were fully reserved prior to this forfeiture, the deferred tax asset of approximately $19.5 million and the corresponding valuation allowance were reduced to zero during the year ended December 31, 2013.
	The Company and its subsidiaries are subject to state and local income taxes on operations located in states and cities that impose an income tax. In addition, our taxable REIT subsidiaries are subject to federal, state, and local income taxes at regular corporate tax rates.
	At December 31, 2014 and 2013, our deferred tax assets and liabilities are as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Deferred tax assets:
	Net operating losses	$	2,746		$	2,598
	Depreciation and amortization	2,947			2,628
	Other	367			9
	Deferred tax assets, gross	6,060			5,235
	Valuation allowance	(3,564		)	(3,234		)
	Deferred tax assets, net	$	2,496		$	2,001
	Deferred tax liabilities:
	Deferred revenue	$	817		$	764
	Depreciation and amortization	2,077			2,505
	Other	6			5
	Deferred tax liabilities	$	2,900		$	3,274
	Our deferred tax assets and deferred tax liabilities are recorded in our consolidated balance sheet in “prepaid expenses and other assets” and in “other liabilities,” respectively.
	The following table summarizes the changes in our valuation allowance for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	3,234		$	22,315		$	22,385
	Additions charged to expense	351			451			—
	Deductions	(21		)	(19,532		)	(70		)
	Balance at end of year	$	3,564		$	3,234		$	22,315
	During the years ended December 31, 2014 and 2013, we believe we had no liability for unrecognized tax benefits. Our policy is to include any interest and penalties related to income taxes within the income tax line item in our consolidated statement of operations.  We generally remain subject to examination by tax authorities for the past three tax years.
	At December 31, 2014, TIER REIT, Inc. had net operating loss carryforwards of approximately $535.5 million for income tax purposes that expire in years 2028 to 2033, and capital loss carryforwards of approximately $195.7 million for income tax purposes that expire in 2018.
	The tax basis of our net assets and liabilities exceeds the book value by approximately $273.1 million at December 31, 2014, and approximately $207.6 million at December 31, 2013.
	The following table reconciles our net income (loss) attributable to common stockholders to our taxable loss for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Net income (loss) attributable to common stockholders	$	(17,442	)	$	15,552		$	(152,101	)
	Depreciation and amortization	66,145			51,860			57,385
	Impairment losses	13,147			4,870			73,431
	GAAP rent adjustments	(11,510		)	(14,330		)	(22,093		)
	Loss on dispositions	(62,747		)	(71,654		)	(31,538		)
	(Gain) loss on troubled debt restructuring and early extinguishment of debt	15,539			(29,388		)	(35,757		)
	Unconsolidated tax entities - primarily IPC (US), Inc.	—			(21,903		)	48,940
	Long term capital gain on exchange of stock for member interest in IPC (US), LLC	—			14,130			—
	Long term capital loss on investment allowed	—			(14,130		)	—
	Other	1,192			(1,341		)	(1,684		)
	Taxable income (loss)	$	4,324		$	(66,334	)	$	(63,417	)
	The components of the benefit (provision) for income taxes from continuing operations for the years ended December 31, 2014, 2013 and 2012 are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(65	)	$	(2	)	$	—
	State	(776		)	(944		)	(692		)
	Total current	(841		)	(946		)	(692		)
	Deferred:
	Federal	31			84			181
	State	838			344			451
	Total deferred	869			428			632
	Total income tax benefit (provision) - continuing operations	$	28		$	(518	)	$	(60	)

Derivative_Instruments_and_Hed

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2014
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 caps and swaps as part of our interest rate risk management strategy.  Our interest rate caps and swaps involve the receipt of variable-rate amounts from counterparties in exchange for us making capped-rate or fixed-rate payments over the life of the agreements without exchange of the underlying notional amount.  Our hedging strategy of entering into interest rate caps and swaps, therefore, is to eliminate or reduce, to the extent possible, the volatility of cash flows.
	We had no derivative financial instruments outstanding at December 31, 2013. The following table summarizes the notional values of our derivative financial instruments (in thousands) as of December 31, 2014. The notional values provide an indication of the extent of our involvement in these instruments at December 31, 2014, 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	%		4/30/15	10/31/19
	The table below presents the fair value of our derivative financial instruments, included in “other liabilities” on our consolidated balance sheets, as of December 31, 2014 and 2013 (in thousands):
	Derivatives designated as hedging instruments:	For the Year Ended December 31,
		2014			2013
	Interest rate swaps	$	(789	)	$	—
	Total derivatives	$	(789	)	$	—
	The tables below present the effect of the change in fair value of derivative financial instruments in our consolidated statements of operations and comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012 (in thousands):
	Derivatives in Cash Flow Hedging Relationship
		Gain (loss) recognized in OCI on derivative (effective portion)
		for the Year Ended December 31,
		2014			2013				2012
	Interest rate caps	$	—		$	251			$	34
	Interest rate swaps	(789		)	1,428				(806		)
	Total	$	(789	)	$	1,679			$	(772	)
			Amount of loss reclassified from OCI into income (effective portion)
			for the Year Ended December 31,
	Location		2014			2013				2012
	Interest expense (1)		$	5		$	1,006			$	903
	Total		$	5		$	1,006			$	903
	____________
	-1	Increases in fair value as a result of accrued interest associated with our swap and cap 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.
	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 $2.8 million will be reclassified as an increase to interest expense.
	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 $25.0 million, then we could also be declared in default on our derivative obligations.
	As of December 31, 2014, 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 $1.0 million. As of December 31, 2014, we have not posted any collateral related to these agreements. If we had breached any of these provisions at December 31, 2014, we could have been required to settle our obligations under the agreements at the termination value of approximately $1.0 million.

Notes_Payable

Notes Payable	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Notes Payable	Notes Payable
	Our notes payable were approximately $1.2 billion and $1.5 billion in principal amount at December 31, 2014 and 2013, respectively, and exclude notes payable associated with real estate held for sale. As of December 31, 2014, all of our outstanding debt was fixed rate debt (or effectively fixed rate debt, through the use of an interest rate hedge), with the exception of approximately $45.9 million of borrowings from our construction loan for Two BriarLake Plaza. At December 31, 2014, the stated annual interest rates on our outstanding notes payable ranged from 3.04% to 6.22%, excluding mezzanine financing. We had mezzanine financing on one property with a stated annual interest rate of 9.80%. As of December 31, 2014, the effective weighted average interest rate for our consolidated notes payable is approximately 5.34%.
	Our loan agreements generally require us to comply with certain reporting and financial covenants.  As of December 31, 2014, we believe we were in compliance with the debt covenants under each of our loan agreements. As of December 31, 2014, our debt has maturity dates that range from April 2015 to August 2021. In the first quarter of 2015 we paid off approximately $168.3 million in loans secured by ten of our properties that were scheduled to mature in 2015. The payoffs were funded from borrowings on our credit facility, cash on hand, and proceeds from the sale of properties.
	The following table summarizes our notes payable as of December 31, 2014, (in thousands):
	Principal payments due in:
	2015	$	291,862
	2016	555,699
	2017	130,021
	2018	1,622
	2019	126,723
	Thereafter	88,396
	Unamortized discount	(238		)
	Total (1)	$	1,194,085
	____________
	(1) Excludes approximately $97.3 million of notes payable related to real estate held for sale. These notes mature in 2016.
	Credit Facility
	On December 18, 2014, through our operating partnership, Tier OP, we entered into a secured credit agreement providing for total borrowings of up to $475.0 million. Subject to lender approval, certain conditions, and payment of certain activation fees to the agent and lenders, this may be increased up to an additional $225.0 million in the aggregate.  The facility consists of a $250.0 million term loan and a $225.0 million revolving line of credit. The term loan matures on December 18, 2019. The revolving line of credit matures on December 18, 2018, and can be extended one additional year upon payment of an extension fee. The annual interest 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 45 basis points to 230 basis points.  All amounts owed are guaranteed by us and certain subsidiaries of Tier OP.  Draws under the credit facility are secured by a perfected first priority lien and security interest in a collateral pool consisting initially of seven properties owned by certain of our subsidiaries. As of December 31, 2014, we had approximately $47.5 million of borrowings available under the facility with $125.0 million in borrowings outstanding under the term loan and no borrowings outstanding under the revolving line of credit. As of December 31, 2014, the weighted average interest rate for borrowings under the credit facility, inclusive of our interest rate swap, was approximately 3.73%.
	Troubled Debt Restructuring
	We had no troubled debt restructuring in 2014. In 2013, we sold two properties in which the proceeds were used to fully settle the related debt on each property at a discount and, pursuant to deeds-in-lieu of foreclosure, we transferred ownership of three properties to the associated lenders. These transactions were each accounted for as a full settlement of debt. In 2012, pursuant to foreclosures, we transferred ownership of two properties and our ownership interest in an investment property to the associated lenders. These transactions were each accounted for as a full settlement of debt.
	For the years ended December 31, 2013 and 2012, the above transactions resulted in gains on troubled debt restructuring of approximately $36.7 million and $35.6 million, respectively, which, for both 2013 and 2012 was equal to approximately $0.12 in earnings per common share, on both a basic and diluted income per share basis.  These totals include gains on troubled debt restructuring recorded in both continuing operations and discontinued operations.

Equity

Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Equity	Equity
	Limited Partnership Units
	At December 31, 2014, Tier OP had 432,586 units of limited partnership interest held by third parties.  These units of limited partnership interest are convertible into an equal number of shares of our common stock.
	Series A Convertible Preferred Stock
	On September 4, 2012, we issued 10,000 shares of the Series A Convertible Preferred Stock to Services Holdings. Management estimated the fair value of the shares to be approximately $2.7 million at the date of issuance.  Due to the increase in our estimated stock value, the redemption value of the Series A Convertible Preferred Stock at December 31, 2014, is greater than the estimated fair value of these shares at the date of issuance and the value of these shares has been increased to approximately $4.6 million. The increase in value is recorded to temporary equity with an equivalent reduction in additional paid-in capital and is recorded as an increase to net loss attributable to common stockholders.
	Stock Plans
	Our 2005 Incentive Award Plan allows for equity-based incentive awards to be granted to our Employees and Key Personnel (as defined in the plan) as detailed below:
	Stock options. As of December 31, 2014 and 2013, we had outstanding options held by our independent directors to purchase 75,000 shares of our common stock at a weighted average exercise price of $6.69 per share. These options have a maximum term of ten years and were exercisable one year after the date of grant.  The options were anti-dilutive to earnings per share for the each period presented.
	Restricted stock units. As of December 31, 2014, we had 83,043 restricted stock units outstanding, 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 June 2015 to June 2019. Expense is measured at the grant date based on the estimated fair value of the award and is recognized over the vesting period. The restricted stock units were anti-dilutive to earnings per share for each period presented. The following is a summary of the number of restricted stock units outstanding as of December 31, 2014 and 2013:
		December 31, 2014		December 31, 2013
	Outstanding at the beginning of the year	37,407		—
	Issued (1)	45,636		37,407
	Outstanding at the end of the period	83,043		37,407
	_____________
	(1) Units issued in 2014 had a grant price of $4.20 per unit. Units issued in 2013 had a grant price of $4.01 per unit. As of December 31, 2014, 37,407 units are vested.
	Restricted stock. As of December 31, 2014, we had 711,376 shares of restricted stock outstanding, held by employees. Restrictions on these shares 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 December 31, 2014 and 2013:
		December 31, 2014		31-Dec-13
	Outstanding at the beginning of the year	423,325		—
	Issued (1)	450,065		429,560
	Forfeiture	(56,183	)	(6,235	)
	Restrictions lapsed (2)	(105,831	)	—
	Outstanding at the end of the period	711,376		423,325
	_____________
	(1) Shares issued in 2014 had a grant price of $4.20 per share. Shares issued in 2013 had a grant price of $4.01 per share.
	(2) 33,592 of these shares were surrendered to pay withholding tax.
	Distributions
	In December 2012, our board of directors approved the suspension of common stock distribution payments. As noted in previous filings, distributions are authorized at the discretion of our board of directors based on its analysis of numerous factors, including but not limited to our forthcoming cash needs, and there is no assurance we will pay distributions in the future or at any particular rate. In 2012, the declared distribution rate was equal to a monthly amount of $0.0083 per share of common stock, which is equivalent to an annual distribution rate of 1.0% based on a purchase price of $10.00 per share. No distributions for common stock were declared in the years ended December 31, 2013 or 2014.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	We purchase certain administrative services from BHT Advisors, LLC (“BHT Advisors”), such as human resources, shareholder services, and information technology. We also pay BHT Advisors acquisition fees related to the development of Two BriarLake Plaza. HPT Management Services, LLC (“HPT Management”) provides property management services for our properties. Current board members, Messrs. Robert S. Aisner and M. Jason Mattox, serve as officers and are partial owners of the ultimate parent entity of BHT Advisors and HPT Management.
	We may terminate the administrative services agreement with BHT Advisors on or after June 30, 2015, by delivering notice to BHT Advisors of our intent to terminate no less than 90 days prior to the effective date. Upon termination, we would be required to pay BHT Advisors an amount, in cash, equal to 0.75 times the gross amount of all service charges payable with respect to such terminated services for the trailing 12-month period ending with the last full month prior to the delivery of notice of termination. We intend to terminate the administrative services agreement effective June 30, 2015.
	Our property management agreement with HPT Management includes a buyout option pursuant to which (1) we would acquire and assume certain assets and certain liabilities of HPT Management and (2) HPT Management would be deemed to have irrevocably waived the non-solicitation and non-hire provisions of the management agreement with respect to certain persons, including employees of HPT Management providing property management functions on our behalf. We may exercise this buyout option on or after June 30, 2015, by delivering notice to HPT Management of our intent to exercise this option no less than 90 days prior to the proposed closing date. Upon closing of the buyout, we would be required to pay HPT Management an amount, in cash, equal to 0.8 times the gross amount of all management and oversight fees earned by HPT Management under the management agreement for the trailing 12-month period ending with the last full month prior to delivery of the notice. We intend to exercise the property management buyout option effective June 30, 2015.
	In August 2012, we paid BHT Advisors approximately $1.5 million in consideration for certain assets located at our corporate offices and used in our business, such as IT equipment and office furniture; for the license under the license agreement regarding our use of the “Behringer Harvard” name and logo; and for the other agreements, covenants, and obligations in connection with the transaction. Approximately $1.4 million of this amount was reflected in our other intangible assets and approximately $0.1 million was expensed. In June 2013, we changed our name to TIER REIT, Inc. and no longer use the Behringer Harvard name or logo, and the intangible asset was fully amortized.
	The following is a summary of the related party fees and costs we incurred with these entities during the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014		2013		2012
	BHT Advisors, acquisition fees	$	704	$	934	$	106
	BHT Advisors, debt financing fees	—		—		660
	BHT Advisors, asset management fee	—		—		10,484
	BHT Advisors, other fees and reimbursement for services provided	2,328		2,426		3,766
	HPT Management, property and construction management fees	11,369		13,191		13,931
	HPT Management, reimbursement of costs and expenses	18,557		21,022		23,537
	Total	$	32,958	$	37,573	$	52,484
	Expensed	$	30,909	$	35,356	$	50,668
	Capitalized to deferred financing fees	—		—		660
	Capitalized to real estate under development	487		934		106
	Capitalized to buildings and improvements, net	1,562		1,283		1,050
	Total	$	32,958	$	37,573	$	52,484
	At both December 31, 2014 and 2013, we had payables to related parties of approximately $2.0 million, consisting primarily of expense reimbursements payable to BHT Advisors and property management fees payable to HPT Management.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	As of December 31, 2014, we had commitments of approximately $45.4 million for future tenant improvements, leasing commissions, and completing renovations at a disposed property.
	We have Employment Agreements (collectively, the “Employment Agreements”) with each of the following executive
	officers: Scott W. Fordham, our Chief Executive Officer and President; Dallas E. Lucas, our Chief Financial Officer; William J.
	Reister, our Chief Investment Officer and Executive Vice President; Telisa Webb Schelin, our Senior Vice President - Legal, General Counsel and Secretary; and James E. Sharp, our Chief Accounting Officer. The term of each of these Employment Agreements ends on May 31, 2017, 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 the Company terminated all of these agreements without cause as of December 31, 2014, we would have recognized approximately $9.6 million in compensation expense.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information
	Supplemental cash flow information is summarized below for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		2014		2013		2012
	Interest paid, net of amounts capitalized	$	82,819	$	106,946	$	118,530
	Income taxes paid	$	1,054	$	1,440	$	1,232
	Non-cash investing activities:
	Property and equipment additions in accounts payable and accrued liabilities	$	26,193	$	25,666	$	25,751
	Amortization of deferred financing fees in building and improvements, net	$	913	$	—	$	—
	Transfer of real estate and lease intangibles through cancellation of debt	$	—	$	52,361	$	32,700
	Transfer of investment through cancellation of debt	$	—	$	—	$	4,259
	Sale of real estate and lease intangibles to unconsolidated joint venture	$	—	$	60,660	$	—
	Acquisition of real estate through exchange of real estate	$	62,578	$	—	$	—
	Non-cash financing activities:
	Common stock issued in distribution reinvestment plan	$	—	$	—	$	13,066
	Assumption of debt by unconsolidated joint venture	$	—	$	82,291	$	—
	Mortgage notes assumed by purchaser	$	—	$	24,250	$	73,119
	Cancellation of debt through transfer of real estate	$	—	$	57,934	$	59,251
	Cancellation of debt through discounted payoff	$	—	$	9,530	$	—
	Accretion of Series A Convertible Preferred Stock	$	1,926	$	—	$	—
	Issuance of Series A Convertible Preferred Stock	$	—	$	—	$	2,700
	Financing costs in accrued liabilities	$	11	$	65	$	—

Discontinued_Operations_and_Re

Discontinued Operations and Real Estate Held for Sale	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Real Estate Held for Sale	Discontinued Operations and Real Estate Held for Sale
	During 2014, 2013, and 2012, we disposed of two, eleven, and five consolidated properties, respectively. As of December 31, 2014, we also had three properties classified as real estate held for sale. The results of operations of the disposed and held for sale properties have been reclassified as discontinued operations in the accompanying consolidated statements of operations and comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012, as summarized in the following table (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Rental revenue	$	59,118		$	125,471		$	166,168
	Expenses
	Property operating expenses	19,285			36,910			50,718
	Interest expense	20,023			28,402			40,730
	Real estate taxes	10,225			20,889			26,682
	Property and asset management fees	1,738			3,553			8,468
	Asset impairment losses	8,225			4,879			25,996
	Depreciation and amortization	26,198			52,239			68,951
	Total expenses	85,694			146,872			221,545
	Provision for income taxes	—			(1		)	(7		)
	Loss on early extinguishment of debt (1)	(15,136		)	(1,416		)	—
	Gain on troubled debt restructuring	—			36,726			35,421
	Interest and other income (expense)	(13		)	9			220
	Income (loss) from discontinued operations	$	(41,725	)	$	13,917		$	(19,743	)
	_____________
	(1) The loss on early extinguishment of debt was comprised of write-off of deferred financing fees and early termination fees associated with the sale of certain properties and the payoff of related debt.
	As of December 31, 2014, we had three properties classified as real estate held for sale. We had no real estate held for sale as of December 31, 2013. The major classes of assets and obligations associated with real estate held for sale are as follows (in thousands):
			31-Dec-14
	Land		$	10,977
	Buildings and improvements, net of approximately $38.0 million in accumulated depreciation		108,891
	Accounts receivable and other assets, net of approximately $0.1 million in allowance for doubtful accounts		7,290
	Lease intangibles, net of approximately $15.5 million in accumulated amortization		10,482
	Assets associated with real estate held for sale		$	137,640
	Notes payable		$	97,257
	Acquired below-market leases, net of approximately $3.2 million in accumulated amortization		1,513
	Other liabilities		9,573
	Obligations associated with real estate held for sale		$	108,343

Quarterly_Results_Unaudited

Quarterly Results (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results (Unaudited)	Quarterly Results (Unaudited)
	Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2014 and 2013 (in thousands, except per share data):
	2014 Quarters Ended	March 31			June 30			September 30			December 31
	Rental revenue	$	68,298		$	69,518		$	70,456		$	72,870
	Loss from continuing operations	$	(16,666	)	$	(13,597	)	$	(13,693	)	$	(20,068	)
	Income (loss) from discontinued operations	(12,991		)	(3,703		)	(2,687		)	67,877
	Net income (loss)	$	(29,657	)	$	(17,300	)	$	(16,380	)	$	47,809
	Net income (loss) attributable to common stockholders	$	(29,614	)	$	(17,279	)	$	(16,355	)	$	45,806
	Basic and diluted weighted average common shares outstanding	299,229			299,264			299,264			299,264
	Basic and diluted income (loss) per common share	$	(0.10	)	$	(0.06	)	$	(0.05	)	$	0.15
	2013 Quarters Ended	March 31			June 30			September 30			December 31
	Rental revenue	$	70,605		$	71,233		$	71,230		$	69,003
	Income (loss) from continuing operations before gain on sale of assets	$	(18,941	)	$	(18,906	)	$	(19,668	)	$	3,043
	Income (loss) from discontinued operations	6,817			(1,262		)	26,816			21,982
	Gain on sale of assets	16,102			—			—			—
	Net income (loss)	$	3,978		$	(20,168	)	$	7,148		$	25,025
	Net income (loss) attributable to common stockholders	$	3,966		$	(20,137	)	$	6,719		$	25,004
	Basic and diluted weighted average common shares outstanding	299,192			299,192			299,192			299,192
	Basic and diluted income (loss) per common share	$	0.01		$	(0.07	)	$	0.02		$	0.08

Subsequent_Event_Subsequent_Ev

Subsequent Event Subsequent Event	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Event	On March 6, 2015, we sold our One & Two Chestnut Place property located in Worcester, Massachusetts, to an unaffiliated third-party for a contract purchase price of approximately $14.0 million.

Schedule_II

Schedule II	12 Months Ended
	Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	TIER REIT, Inc.
	Valuation and Qualifying Accounts
	Schedule II
	December 31, 2014
	(in thousands)
	Allowance for Doubtful Accounts	Balance at		Charged to		Charged to			Write-Offs, Net			Balance at End
		Beginning		Costs and		Other			of Recoveries			of Year
		of Year		Expenses		Accounts
	Year to date December 31, 2014	$	1,289	$	725	$	(45	)	$	(768	)	$	1,201
	Year to date December 31, 2013	$	1,263	$	418	$	—		$	(392	)	$	1,289
	Year to date December 31, 2012	$	1,459	$	467	$	—		$	(663	)	$	1,263

Schedule_III

Schedule III	12 Months Ended
	Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Real Estate and Accumulated Depreciation
	TIER REIT, Inc.
	Real Estate and Accumulated Depreciation
	Schedule III
	December 31, 2014
	(in thousands)
																		Gross amount
											Initial cost				Costs capitalized			at which
													Building and		subsequent			carried at		Accumulated		Year of	Date
	Property Name		Location		Encumbrances						Land		Improvements		to acquisition (1)			close of period (2)		depreciation		construction	acquired
	Lawson Commons		St. Paul, MN		$	53,793					$	2,021	$	75,881	$	8,012		$	85,914	$	30,191	1999	Jun-05
	Buena Vista Plaza		Burbank, CA		20,630						3,806		28,368		534			32,708		10,772		1991	Jul-05
	1325 G Street		Washington, D.C.		100,000						71,313		60,681		12,956			144,950		24,734		1969	Nov-05
	Woodcrest Corporate Center		Cherry Hill, NJ		47,460						5,927		49,977		5,033			60,937		20,637		1960	Jan-06
	Burnett Plaza		Ft. Worth, TX		101,864						6,239		157,171		20,623			184,033		61,204		1983	Feb-06
	The Terrace Office Park		Austin, TX		125,781						17,330		124,551		14,192			156,073		46,304		1997-2002	Jun-06
	Bank of America Plaza		Charlotte, NC		150,000						26,656		185,215		21,521			233,392		65,025		1974	Oct-06
	Three Parkway		Philadelphia, PA		64,331						7,905		69,033		13,960			90,898		25,962		1970	Oct-06
	One & Two Eldridge Place		Houston, TX		72,022						6,605		89,506		16,716			112,827		34,238		1984-1986	Dec-06
	Centreport Office Center		Ft. Worth, TX		125,000			(3	)		3,175		12,917		(6,233		)	9,859		2,704		1999	Jun-07
	FOUR40		Chicago, IL		—			(3	)		23,285		265,099		(86,910		)	201,474		24,140		1984	Nov-07
	111 Woodcrest		Cherry Hill, NJ		—			(3	)		1,000		5,417		(853		)	5,564		1,422		1964	Nov-07
	1650 Arch Street		Philadelphia, PA		—			(3	)		24,000		60,825		(19,899		)	64,926		14,685		1974	12/2007-03/2011
	United Plaza		Philadelphia, PA		—						23,736		90,001		12,568			126,305		28,447		1975	Dec-07
	One Oxmoor Place		Louisville, KY		66,692			(4	)		2,851		17,614		2,129			22,594		5,765		1989	Dec-07
	Hurstbourne Place		Louisville, KY		—			(4	)		4,587		30,203		(12,638		)	22,152		6,484		1982	Dec-07
	Hurstbourne Park		Louisville, KY		—			(4	)		2,297		12,728		(3,014		)	12,011		3,348		1971	Dec-07
	Hurstbourne Plaza (5)		Louisville, KY		—			(4	)		4,000		10,054		(384		)	13,670		9,417		1971	Dec-07
	Forum Office Park		Louisville, KY		—			(4	)		6,811		32,548		9,721			49,080		11,282		1984	Dec-07
	Lakeview		Louisville, KY		—			(4	)		1,468		8,574		(2,936		)	7,106		979		1989	Dec-07
	Steeplechase Place		Louisville, KY		—			(4	)		1,766		7,424		1,581			10,771		2,386		1989	Dec-07
	Hunnington		Louisville, KY		—			(4	)		978		5,507		(404		)	6,081		1,483		1986	Dec-07
	One & Two Chestnut Place		Worcester, MA		—			(4	)		2,903		15,715		(10,070		)	8,548		39		1990	Dec-07
	5104 Eisenhower Boulevard		Tampa, FL		—			(3	)		2,602		25,054		6,121			33,777		8,826		1998	Dec-07
	Plaza at MetroCenter		Nashville, TN		23,622						3,341		35,333		(2,996		)	35,678		4,954		1985	Dec-07
	Loop Central		Houston, TX		42,486						11,653		86,587		15,958			114,198		30,541		1980-1982	Dec-07
	801 Thompson		Rockville, MD		—						3,200		10,578		108			13,886		3,028		1963	Dec-07
	500 E. Pratt		Baltimore, MD		58,800						—		66,390		2,023			68,413		19,607		2004	Dec-07
	One BriarLake Plaza		Houston, TX		95,947						9,602		119,660		9,876			139,138		33,171		2000	Sep-08
	Two BriarLake Plaza		Houston, TX		45,895						2,446		75,687		—			78,133		127		2014	12/2009-9/2014
	Colorado Building		Washington, D.C.		—			(3	)		13,328		28,109		2,851			44,288		9,217		1903	08/2004-12/2008
	Three Eldridge Place		Houston ,TX		—			(3	)		3,090		62,181		10,659			75,930		16,310		2009	12/2006-11/2009
	5950 Sherry Lane		Dallas, TX		—						10,002		50,876		3			60,881		—		1999	Dec-14
	unamortized discount				(238		)				—		—		—			—		—
	Totals (6)				$	1,194,085					$	309,923	$	1,975,464	$	40,808		$	2,326,195	$	557,429
	____________
	Generally, each of our properties has a depreciable life of 25 years.
	(1)  Includes adjustments to basis, such as impairment losses.
	(2)  The aggregate cost for federal income tax purposes is approximately $2.5 billion.
	(3) Centreport Office Center, FOUR40, 111 Woodcrest, 5104 Eisenhower Blvd., the Colorado Building, Three Eldridge Place, and 1650 Arch Street are each held as collateral for this notes payable.
	(4)  One Oxmoor Place, Hurstborne Place, Hurstborne Park, Hurstborne Plaza, Forum Office Park, Lakeview, Steeplechase Place, Hunnington, and One & Two Chestnut Place are each held as collateral for this note payable.
	(5)  Hurstborne Plaza is a retail shopping center.  All of our other properties are office buildings.
	(6) Excludes balances related to real estate held for sale at December 31, 2014.
	A summary of activity for real estate and accumulated depreciation for the years ended December 31, 2014, 2013 and 2012, is as follows (in thousands):
		Year Ended December 31, 2014				Year Ended December 31, 2013				Year Ended December 31, 2012
	Real Estate:
	Balance at beginning of year	$	2,624,160			$	3,222,358			$	3,597,339
	Acquisitions/improvements	160,435				98,519				76,304
	Assets disposed/written-off	(458,400		)		(696,717		)		(451,285		)
	Balance at end of the year	$	2,326,195			$	2,624,160			$	3,222,358
	Accumulated depreciation:
	Balance at beginning of year	$	586,585			$	593,389			$	617,402
	Depreciation expense	112,394				128,599				141,046
	Assets disposed/written-off	(141,550		)		(135,403		)		(165,059		)
Balance at end of the year	$	557,429			$	586,585			$	593,389
*****

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  These estimates include such items as the purchase price allocation for real estate acquisitions, impairment of assets, timing of asset dispositions, duration of lease terms, depreciation and amortization, and allowance for doubtful accounts.  Actual results could differ materially from those estimates.
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation
	Our 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.  All inter-company transactions, balances, and profits have been eliminated in consolidation.  Interests in entities acquired are evaluated based on applicable GAAP which requires the consolidation of VIEs in which we are deemed to be the primary beneficiary.  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. We had no VIEs as of December 31, 2014, 2013 or 2012.
Real Estate	Real Estate
	Upon the acquisition of real estate properties, we recognize the assets acquired, the liabilities assumed, and any noncontrolling interest as of the acquisition date, measured at their fair values.  The acquisition date is the date on which we obtain control of the real estate property.  The assets acquired and liabilities assumed may consist of land, inclusive of associated rights, buildings, assumed debt, identified intangible assets and liabilities, and asset retirement obligations.  Identified intangible assets generally consist of above-market leases, in-place leases, in-place tenant improvements, in-place leasing commissions, and tenant relationships.  Identified intangible liabilities generally consist of below-market leases.  Goodwill is recognized as of the acquisition date and measured as the aggregate fair value of the consideration transferred and any noncontrolling interests in the acquiree over the fair value of the identifiable net assets acquired.  Likewise, a bargain purchase gain is recognized in current earnings when the aggregate fair value of the consideration transferred and any noncontrolling interests in the acquiree is less than the fair value of the identifiable net assets acquired.  Acquisition-related costs are expensed in the period incurred. Initial valuations are subject to change until our information is finalized, which is no later than twelve months from the acquisition date.
	The fair value of the tangible assets acquired, consisting of land and buildings, is determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land and buildings.  Land values are derived from appraisals or other relevant market information available to us, and building values are calculated as replacement cost less depreciation or management’s estimates of the fair value of these assets using discounted cash flow analyses or similar methods believed to be used by market participants.  The value of buildings is depreciated over the estimated useful life of 25 years using the straight-line method.
	We determine the fair value of assumed debt by calculating the net present value of the scheduled mortgage payments using interest rates for debt with similar terms and remaining maturities that management believes we could obtain at the date of the debt assumption.  Any difference between the fair value and stated value of the assumed debt is recorded as a discount or premium and amortized over the remaining life of the loan using the effective interest method.
	We determine the value of above-market and below-market leases for acquired properties based on the present value (using an interest rate that reflects the risks associated with the leases acquired) of the difference between (1) the contractual amounts to be paid pursuant to the in-place leases and (2) management’s estimate of current market lease rates for the corresponding in-place leases, measured over a period equal to (a) the remaining non-cancelable lease term for above-market leases, or (b) the remaining non-cancelable lease term plus any below-market fixed rate renewal options that, based on a qualitative assessment of several factors, including the financial condition of the lessee, the business conditions in the industry in which the lessee operates, the economic conditions in the area in which the property is located, and the ability of the lessee to sublease the property during the renewal term, are reasonably assured to be exercised by the lessee for below-market leases.  We record the fair value of above-market and below-market leases as intangible assets or intangible liabilities, respectively, and amortize them as an adjustment to rental income over the determined lease term.
	The total value of identified real estate intangible assets acquired is further allocated to in-place leases, in-place tenant improvements, in-place leasing commissions, and tenant relationships based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant.  The aggregate value for tenant improvements and leasing commissions is based on estimates of these costs incurred at inception of the acquired leases, amortized through the date of acquisition.  The aggregate value of in-place leases acquired and tenant relationships is determined by applying a fair value model.  The estimates of fair value of in-place leases include an estimate of carrying costs during the expected lease-up periods for the respective spaces considering current market conditions.  In estimating the carrying costs that would have otherwise been incurred had the leases not been in place, we include such items as real estate taxes, insurance, and other operating expenses, as well as lost rental revenue during the expected lease-up period based on current market conditions.  The estimates of the fair value of tenant relationships also include costs to execute similar leases including leasing commissions, legal fees, and tenant improvements, as well as an estimate of the likelihood of renewal as determined by management on a tenant-by-tenant basis.
	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 initial term 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 intangibles related to that tenant would be charged to expense.
	The estimated remaining useful lives for acquired lease intangibles range from an ending date of January 2015 to an ending date of December 2030.  Anticipated amortization associated with the acquired lease intangibles for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
	2015	$	5,777
	2016	$	3,027
	2017	$	2,265
	2018	$	1,541
	2019	$	1,695
	As of December 31, 2014 and 2013, accumulated depreciation and amortization related to our consolidated real estate properties and related lease intangibles were as follows (in thousands):
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2014
	Cost		$	2,039,765			$	215,913		$	11,785		$	(59,605	)
	Less: accumulated depreciation and amortization		(557,429		)		(123,242		)	(9,766		)	42,621
	Net		$	1,482,336			$	92,671		$	2,019		$	(16,984	)
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2013
	Cost		$	2,255,384			$	305,233		$	19,264		$	(76,750	)
	Less: accumulated depreciation and amortization		(586,585		)		(177,088		)	(13,045		)	52,180
	Net		$	1,668,799			$	128,145		$	6,219		$	(24,570	)
Real Estate Development	Real Estate Development
	We capitalize project costs related to the development and construction of real estate (including interest and related loan fees, property taxes, insurance, and other direct costs associated with the development) as a cost of the development. Indirect costs not clearly related to development and construction are expensed as incurred. Capitalization begins when we determine that the development is probable and significant development activities are underway. 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.
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 third-party broker valuation estimates, 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 Investment Officer, and Chief Accounting Officer 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 years ended December 31, 2014, 2013 and 2012, we recorded non-cash impairment charges of approximately $13.2 million, $4.9 million and $98.1 million, respectively, related to the impairment of consolidated real estate assets, including discontinued operations.  The impairment losses recorded were primarily related to assets assessed for impairment due to changes in management’s estimates of the intended hold period for certain of our properties.
	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 years ended December 31, 2014, 2013 or 2012.
	In evaluating our investments for impairment, management makes several estimates and assumptions, including, but not limited to, the projected date of disposition 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.
Cash and Cash Equivalents	Cash and Cash Equivalents
	We consider investments in highly-liquid money market funds or investments with original maturities of three months or less to be cash equivalents.
Restricted Cash	Restricted Cash
	Restricted cash includes restricted money market accounts, as required by our lenders or by leases, for anticipated tenant improvements, property taxes and insurance, and certain tenant security deposits for our consolidated properties, as well as cash committed as part of a sale agreement for renovations at a disposed property.
Accounts Receivable, net	Accounts Receivable, net
	The following is a summary of our accounts receivable as of December 31, 2014 and 2013 (in thousands):
			December 31, 2014				31-Dec-13
	Straight-line rental revenue receivable		$	73,266			$	88,370
	Tenant receivables		10,165				9,389
	Non-tenant receivables		1,150				714
	Allowance for doubtful accounts		(1,201		)		(1,289		)
	Total		$	83,380			$	97,184
Prepaid Expenses and Other Assets	Prepaid Expenses and Other Assets
	Prepaid expenses and other assets include prepaid insurance, prepaid real estate taxes, utility and other deposits of the properties we consolidate, as well as our deferred tax assets and prepaid directors’ and officers’ insurance.
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities
	Investments in unconsolidated entities at December 31, 2014, consist of our noncontrolling interests in the Wanamaker Building and Paces West properties.
	We account for these investments using the equity method of accounting in accordance with GAAP.  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).  We use the equity method of accounting because the shared decision-making involved in these investments creates an opportunity for us to have some influence on the operating and financial decisions of these investments and thereby creates some responsibility by us for a return on our investment.  While we own a 60% majority of the Wanamaker Building, major decisions require at least a vote of 70% of the ownership group; therefore, this investment is presented using the equity method of accounting.
Deferred Financing Fees, net	Deferred Financing Fees, net
	Deferred financing fees are recorded at cost and are amortized to interest expense using a straight-line method that approximates the effective interest method over the anticipated life of the related debt. The following is a summary of our deferred financing fees as of December 31, 2014 and 2013 (in thousands):
		December 31, 2014				December 31,
						2013
	Cost	$	24,704			$	26,044
	Less: accumulated amortization	(13,921		)		(16,066		)
	Net	$	10,783			$	9,978
Other Intangible Assets	Other Intangible Assets
	Other intangible assets consist of an above-market ground lease on a property where a third party owns and has leased the underlying land to us. As of December 31, 2014 and 2013, the cost basis and accumulated amortization related to our consolidated other intangibles assets were as follows (in thousands):
		December 31, 2014				31-Dec-13
	Cost	$	2,978			$	2,978
	Less: accumulated depreciation and amortization	(834		)		(715		)
	Net	$	2,144			$	2,263
	We amortize the value of other intangible assets to expense over the estimated remaining useful life which has an ending date of December 2032. Anticipated amortization associated with other intangible assets for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
	2015	$	119
	2016	$	119
	2017	$	119
	2018	$	119
	2019	$	119
Real Estate Held for Sale	Real Estate Held for Sale
	We classify properties as held for sale when certain criteria are met, in accordance with GAAP.  At that time, we present the assets and obligations associated with the real estate held for sale separately in our consolidated balance sheet, and we cease recording depreciation and amortization expense related to that property.  Real estate held for sale is reported at the lower of its carrying amount or its estimated fair value less estimated costs to sell.  As of December 31, 2014, we had three properties classified as real estate held for sale. We had no real estate held for sale as of December 31, 2013.
Derivative Financial Instruments	Derivative Financial Instruments
	We record all derivatives on the balance sheet at fair value.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.  Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges.  For derivatives designated as fair value hedges, the changes in the fair value of both the derivative instrument and the hedged items are recorded in earnings. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.  For derivatives designated as cash flow hedges, the effective portions of changes in the fair value of the derivative are reported in accumulated other comprehensive income (loss) and are subsequently reclassified into earnings when the hedged item affects earnings.  Changes in the fair value of derivative instruments not designated as hedges and ineffective portions of hedges are recognized in earnings in the affected period.  Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge.  We may enter into derivative contracts that are intended to economically hedge certain of our risk even though hedge accounting does not apply or we elect not to apply hedge accounting.
	As of December 31, 2014 and 2013, we do not have any derivatives designated as fair value hedges or hedges of net investments in foreign operations, nor are derivatives being used for trading or speculative purposes.
Valuation of Series A Convertible Preferred Stock	Valuation of Series A Convertible Preferred Stock
	On September 4, 2012, we issued 10,000 shares of Series A participating, voting, convertible preferred stock (the “Series A Convertible Preferred Stock”) to Behringer Harvard Services Holdings, LLC (“Services Holdings”) as described further in Footnote 12 (Equity). The shares of Series A Convertible Preferred Stock are initially recorded at fair value and classified as temporary equity, outside the stockholders’ equity section, on our consolidated balance sheets. In estimating the fair value of these shares, management considered various potential outcomes for the conversion of the shares within the context of a probability weighted expected returns model. Subsequent to the date of issuance, the Series A Convertible Preferred Stock is adjusted to its maximum redemption value at the end of each reporting period. However, to the extent that the maximum redemption value of the Series A Convertible Preferred Stock does not exceed the fair value of the shares at the date of issuance, the shares are not adjusted below the fair value at the date of issuance.
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.  The total net increase to rental revenue due to straight-line rent adjustments for the years ended December 31, 2014, 2013 and 2012, was approximately $6.4 million, $6.4 million, and $16.1 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 years ended December 31, 2014, 2013 and 2012, was approximately $4.1 million, $9.5 million, and $11.7 million, respectively. Revenue 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.  We recognized lease termination fees of approximately $2.7 million, $2.3 million, and $1.2 million for the years ended December 31, 2014, 2013 and 2012, respectively. Each of the amounts presented above include rental revenue amounts recognized in discontinued operations.
Income Taxes	Income Taxes
	We have elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), and have qualified as a REIT since the year ended December 31, 2004.  The Company is generally not subject to federal income taxes to the extent we distribute our REIT taxable income to our stockholders currently each year and we meet certain other organizational and operational requirements.  In addition to the Company, our business is conducted through our operating partnership, Tier OP, and various subsidiaries, including limited liability companies, partnerships and corporations elected to be treated as taxable REIT subsidiaries.  The Company and its subsidiaries are subject to state and local income taxes on operations located in states, cities, and other jurisdictions that impose an income tax.  In addition, our taxable REIT subsidiaries are subject to federal, state, and local income taxes at regular corporate tax rates.
Stock based Compensation	Stock Based Compensation
	We have a stock-based incentive award plan for our employees, independent directors, and consultants.  Compensation cost for restricted stock and restricted stock units is measured at the grant date based on the estimated fair value of the award and will be recognized as expense over the service period based on the tiered lapse schedule and estimated forfeiture rates. Stock options are granted at the fair market value on the date of grant with fair value estimated using the Black-Scholes-Merton option valuation model that incorporates assumptions surrounding volatility, distribution yield, the risk-free interest rate, expected life, and the exercise price as compared to the underlying stock price on the grant date.  Any tax benefits associated with these share-based payments are classified as financing activities in the consolidated statements of cash flows.  For the years ended December 31, 2014 and 2013, we had approximately $1.4 million and $0.8 million, respectively, in compensation costs related to share-based payments. For the year ended December 31, 2012, we had no significant compensation cost related to share-based payments.
401(k) Plan	401(k) Plan
	Since August 2012 we have had a 401(k) defined contribution plan (“401(k) Plan”) for the benefit of our eligible employees. Each employee may contribute up to 100% of their annual compensation, subject to specific limitations under the Code.  Our 401(k) Plan allows us to make discretionary contributions during each plan year. For the years ended December 31, 2014 and 2013, we expensed approximately $0.2 million and $0.3 million in employer contributions, respectively.  We expensed no employer contributions for the year ended December 31, 2012.
Concentration of Credit Risk	Concentration of Credit Risk
	We have cash and cash equivalents and restricted cash deposited in certain financial institutions in excess of federally insured levels.  We have diversified our accounts with several banking institutions in an attempt to minimize exposure to any one of these institutions.  We regularly monitor the financial stability of these financial institutions and believe that we are not exposed to significant credit risk in cash and cash equivalents or restricted cash.
	We have properties located in Houston, Texas; Philadelphia, Pennsylvania; and Chicago, Illinois, which subject us to the business risk associated with our geographic concentration in these markets. The percentage of our total rental revenue from these markets for the years ended December 31, 2014, 2013 and 2012, are 47%, 47%, and 44%, respectively.
Noncontrolling interests	Noncontrolling Interests
	Noncontrolling interests consists of our third-party partners’ proportionate share of equity in certain consolidated real estate properties, limited partnership units issued to third parties, and restricted stock units issued to our independent directors.
Earnings Per Share	Earnings per Share
	Earnings per share is calculated based on the weighted average number of common shares outstanding during each period.  Stock options, units of limited partnership interest, Series A Convertible Preferred stock, restricted stock, and restricted stock units are excluded from the calculation of earnings per share for all periods presented in this report because the effect would be anti-dilutive.  Gain on sale of assets is included in the calculation of loss from continuing operations per share in accordance with SEC guidelines.
Reportable Segments	Reportable Segments
	Our current business consists of owning, operating, acquiring, developing, investing in, and disposing of real estate assets.  All of our consolidated revenues are from our consolidated real estate properties.  Our chief operating decision maker evaluates operating performance on an individual property level and views all of our real estate assets as one industry segment. Accordingly, all of our properties are aggregated into one reportable segment.
Subsequent Events	Subsequent Events
	We have evaluated subsequent events for recognition or disclosure in our consolidated financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Anticipated amortization associated with the intangibles for each of the five years	Anticipated amortization associated with the acquired lease intangibles for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
	2015	$	5,777
	2016	$	3,027
	2017	$	2,265
	2018	$	1,541
	2019	$	1,695
Schedule of cost basis, accumulated depreciation and amortization related to entity's consolidated real estate properties and related lease intangibles	As of December 31, 2014 and 2013, accumulated depreciation and amortization related to our consolidated real estate properties and related lease intangibles were as follows (in thousands):
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2014
	Cost		$	2,039,765			$	215,913		$	11,785		$	(59,605	)
	Less: accumulated depreciation and amortization		(557,429		)		(123,242		)	(9,766		)	42,621
	Net		$	1,482,336			$	92,671		$	2,019		$	(16,984	)
							Lease Intangibles
							Assets						Liabilities
			Buildings and Improvements				Other Lease Intangibles			Acquired Above-Market Leases			Acquired Below-Market Leases
	as of December 31, 2013
	Cost		$	2,255,384			$	305,233		$	19,264		$	(76,750	)
	Less: accumulated depreciation and amortization		(586,585		)		(177,088		)	(13,045		)	52,180
	Net		$	1,668,799			$	128,145		$	6,219		$	(24,570	)
Accounts Receivable, net
Summary of net accounts receivable	The following is a summary of our accounts receivable as of December 31, 2014 and 2013 (in thousands):
			December 31, 2014				31-Dec-13
	Straight-line rental revenue receivable		$	73,266			$	88,370
	Tenant receivables		10,165				9,389
	Non-tenant receivables		1,150				714
	Allowance for doubtful accounts		(1,201		)		(1,289		)
	Total		$	83,380			$	97,184
Deferred Financing Fees, Net [Abstract]
Schedule of deferred financing fees	The following is a summary of our deferred financing fees as of December 31, 2014 and 2013 (in thousands):
		December 31, 2014				December 31,
						2013
	Cost	$	24,704			$	26,044
	Less: accumulated amortization	(13,921		)		(16,066		)
	Net	$	10,783			$	9,978
Other Intangible Assets
Schedule of other intangible assets	As of December 31, 2014 and 2013, the cost basis and accumulated amortization related to our consolidated other intangibles assets were as follows (in thousands):
		December 31, 2014				31-Dec-13
	Cost	$	2,978			$	2,978
	Less: accumulated depreciation and amortization	(834		)		(715		)
	Net	$	2,144			$	2,263
Anticipated amortization associated with other intangible assets for each of the five years [Table Text Block]	Anticipated amortization associated with other intangible assets for each of the years ending December 31, 2015, through December 31, 2019, is as follows (in thousands):
	2015	$	119
	2016	$	119
	2017	$	119
	2018	$	119
	2019	$	119

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
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 December 31, 2014 (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
	Liabilities:
	Derivative financial instruments	$	(789	)	$	—		$	(789	)	$	—
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 2014 (in thousands):
					Basis of Fair Value Measurements
	Description	Fair Value			Quoted Prices			Significant			Significant		Total
		of Assets at Impairment			In Active			Other			Unobservable		Losses
					Markets for			Observable			Inputs
					Identical Items			Inputs			(Level 3)
					(Level 1)			(Level 2)
	Real estate	$	11,489		$	—		$	11,489		$	—	$	(4,940	)
	Real estate held for sale	$	42,000		$	—		$	—		$	42,000	$	(8,225	)
Schedule 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 during the year ended December 31, 2014 (in thousands):
		Fair Value of Assets at Impairment			Valuation Technique		Unobservable Input	Range
	Real estate on which impairment losses were recognized	$	42,000		Discounted Cash Flow		Discount rate	10%
							Terminal capitalization rate	9%
							Market rent growth rate	2%
							Expense growth rate	2% to 3%
Schedule of carrying amounts and related estimated fair value of notes payable	Carrying amounts and the related estimated fair value of our notes payable and our notes payable associated with real estate held for sale as of December 31, 2014 and 2013, are as follows (in thousands):
		December 31, 2014						December 31, 2013
		Carrying Amount			Fair Value			Carrying Amount			Fair Value
	Notes payable	$	1,194,085		$	1,216,991		$	1,490,367		$	1,510,691
	Notes payable associated with real estate held for sale	$	97,257		$	95,011		$	—		$	—

Real_Estate_Activities_Tables

Real Estate Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Summary of disposed consolidated properties	The following table provides a summary of the consolidated properties we disposed of during the years ended December 31, 2014 and 2013 (in thousands):
			Date of Disposal				Rentable Square Footage (unaudited)		Contract Sales Price		Proceeds from Sale (1)
	Property Name				Location
	2014
	City Hall Plaza		9/16/14		Manchester, NH		210		$	19,750	$	19,130
	222 South Riverside Plaza (3)		12/19/14		Chicago, IL		1,184				223,670
							1,394				$	242,800
	2013
	600 & 619 Alexander Road		2/15/13		Princeton, NJ		97		$	9,600	$	9,128
	5 & 15 Wayside		3/22/13		Burlington, MA		270		$	69,321	65,652
	Riverview Tower		5/2/13		Knoxville, TN		334		$	24,250	—
	Epic Center (2)		5/13/13		Wichita, KS		289		$	—	—
	One Brittany Place (2)		5/13/13		Wichita, KS		57		$	—	—
	Two Brittany Place (2)		5/13/13		Wichita, KS		58		$	—	—
	Tice Building (2)		8/30/13		Woodcliff Lakes, NJ		120		$	—	—
	One Edgewater Plaza (2)		8/30/13		Staten Island, NY		252		$	—	—
	Energy Centre		9/12/13		New Orleans, LA		757		$	86,500	80,720
	Ashford Perimeter (2)		9/13/13		Atlanta, GA		288		$	—	—
	10 & 120 South Riverside		11/14/13		Chicago, IL		1,411		$	361,000	340,366
							3,933				$	495,866
	____________
	-1	In 2014, proceeds from sale include approximately $217.8 million in debt paid off with the proceeds of the sale of these properties. In 2013, proceeds from sale are reduced by approximately $24.3 million in debt assumed by the purchasers and includes approximately $407.0 million in debt paid off with the proceeds of the sale of these properties.
	-2	Ownership of each of these properties was transferred to the lender pursuant to a foreclosure or deed-in-lieu of foreclosure.
	-3	The contract sales price for the 222 South Riverside Plaza property was approximately $247.0 million in cash, excluding transaction costs, credits, prorations, and adjustments; plus the conveyance of the 5950 Sherry Lane property in Dallas, Texas, as described below.
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Total consideration transferred was allocated to tangible and identifiable intangible assets acquired and liabilities assumed based on their fair values at the acquisition date as set forth below (in thousands):
	Land	$	10,002
	Building and improvements	50,876
	Lease intangibles	3,809
	Acquired below-market leases	(2,109		)
	Total	$	62,578
Business Acquisition, Pro Forma Information [Table Text Block]	The following summary presents the results of operations (in thousands) for the years ended December 31, 2014 and 2013, on an unaudited pro forma basis, as if the acquisition of 5950 Sherry Lane had occurred on January 1, 2013. This pro forma condensed consolidated financial information is presented for informational purposes only and does not purport to be indicative of what our financial results would have been if the transaction reflected herein had occurred on the date set forth above or been in effect during the periods indicated, nor should it be viewed as indicative of our financial results in the future.
		Year Ended December 31,
		2014				2013
	Rental revenue	$	287,798			$	288,903
	Loss from continuing operations	$	(62,738	)		$	(52,908	)
	Net income (loss) attributable to common stockholders	$	(16,158	)		$	17,114
	Basic and diluted weighted average common shares outstanding	299,255				299,192
	Basic and diluted income (loss) per common share	$	(0.05	)		$	0.06

Investments_in_Unconsolidated_1

Investments in Unconsolidated Entities (Tables)	12 Months Ended
	Dec. 31, 2014
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 December 31, 2014 and 2013 (in thousands):
		Ownership Interest
	Property Name	December 31, 2014	31-Dec-13	December 31, 2014		31-Dec-13
	Wanamaker Building	60.00%	60.00%	$	38,609	$	39,229
	200 South Wacker (1)	0.00%	9.87%	—		1,495
	Paces West	10.00%	10.00%	1,276		1,038
	Total			$	39,885	$	41,762
	_________________
	(1) As a result of the sale of this property in December 2013, based on the operating agreement, our economic interest was promoted to 30%.

Leasing_Activity_Tables

Leasing Activity (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leases of Lessor Disclosure	As Lessor
	Future minimum base rental payments due to us under non-cancelable leases in effect as of December 31, 2014, for operating properties we consolidate, excluding real estate held for sale, are as follows (in thousands):
	Year	Amount
	2015	$	194,041
	2016	180,469
	2017	159,764
	2018	139,542
	2019	110,050
	Thereafter	297,766
	Total	$	1,081,632
Schedule of Future Minimum Rental Payments for Operating Leases	As Lessee
	We have land that is subject to long-term ground leases and we lease office space, parking space, and equipment. Total rent expense for the years ended December 31, 2014, 2013 and 2012, was approximately $2.3 million, $1.2 million and $1.1 million, respectively. Future minimum base rental payments payable by us under these non-cancelable leases are as follows (in thousands):
	Year	Amount
	2015	$	2,223
	2016	2,197
	2017	1,737
	2018	1,433
	2019	982
	Thereafter	19,884
	Total	$	28,456

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Deferred Tax Assets and Liabilities	At December 31, 2014 and 2013, our deferred tax assets and liabilities are as follows (in thousands):
		Year Ended December 31,
		2014			2013
	Deferred tax assets:
	Net operating losses	$	2,746		$	2,598
	Depreciation and amortization	2,947			2,628
	Other	367			9
	Deferred tax assets, gross	6,060			5,235
	Valuation allowance	(3,564		)	(3,234		)
	Deferred tax assets, net	$	2,496		$	2,001
	Deferred tax liabilities:
	Deferred revenue	$	817		$	764
	Depreciation and amortization	2,077			2,505
	Other	6			5
	Deferred tax liabilities	$	2,900		$	3,274
Summary of Valuation Allowance	The following table summarizes the changes in our valuation allowance for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	3,234		$	22,315		$	22,385
	Additions charged to expense	351			451			—
	Deductions	(21		)	(19,532		)	(70		)
	Balance at end of year	$	3,564		$	3,234		$	22,315
Net Loss Attributable to Common Stockholders	The following table reconciles our net income (loss) attributable to common stockholders to our taxable loss for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Net income (loss) attributable to common stockholders	$	(17,442	)	$	15,552		$	(152,101	)
	Depreciation and amortization	66,145			51,860			57,385
	Impairment losses	13,147			4,870			73,431
	GAAP rent adjustments	(11,510		)	(14,330		)	(22,093		)
	Loss on dispositions	(62,747		)	(71,654		)	(31,538		)
	(Gain) loss on troubled debt restructuring and early extinguishment of debt	15,539			(29,388		)	(35,757		)
	Unconsolidated tax entities - primarily IPC (US), Inc.	—			(21,903		)	48,940
	Long term capital gain on exchange of stock for member interest in IPC (US), LLC	—			14,130			—
	Long term capital loss on investment allowed	—			(14,130		)	—
	Other	1,192			(1,341		)	(1,684		)
	Taxable income (loss)	$	4,324		$	(66,334	)	$	(63,417	)
Schedule of Components of Income Tax Expense (Benefit)	The components of the benefit (provision) for income taxes from continuing operations for the years ended December 31, 2014, 2013 and 2012 are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(65	)	$	(2	)	$	—
	State	(776		)	(944		)	(692		)
	Total current	(841		)	(946		)	(692		)
	Deferred:
	Federal	31			84			181
	State	838			344			451
	Total deferred	869			428			632
	Total income tax benefit (provision) - continuing operations	$	28		$	(518	)	$	(60	)

Derivative_Instruments_and_Hed1

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments [Table Text Block]	The following table summarizes the notional values of our derivative financial instruments (in thousands) as of December 31, 2014. The notional values provide an indication of the extent of our involvement in these instruments at December 31, 2014, 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	%		4/30/15	10/31/19
Schedule of fair value of derivative financial instruments, included in prepaid expenses and other assets and other liabilities on consolidated balance sheet	The table below presents the fair value of our derivative financial instruments, included in “other liabilities” on our consolidated balance sheets, as of December 31, 2014 and 2013 (in thousands):
	Derivatives designated as hedging instruments:	For the Year Ended December 31,
		2014			2013
	Interest rate swaps	$	(789	)	$	—
	Total derivatives	$	(789	)	$	—
Schedule of effect of the change in fair value of derivative financial instruments in consolidated statements of operations and comprehensive loss	The tables below present the effect of the change in fair value of derivative financial instruments in our consolidated statements of operations and comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012 (in thousands):
	Derivatives in Cash Flow Hedging Relationship
		Gain (loss) recognized in OCI on derivative (effective portion)
		for the Year Ended December 31,
		2014			2013				2012
	Interest rate caps	$	—		$	251			$	34
	Interest rate swaps	(789		)	1,428				(806		)
	Total	$	(789	)	$	1,679			$	(772	)
			Amount of loss reclassified from OCI into income (effective portion)
			for the Year Ended December 31,
	Location		2014			2013				2012
	Interest expense (1)		$	5		$	1,006			$	903
	Total		$	5		$	1,006			$	903
	____________
	-1	Increases in fair value as a result of accrued interest associated with our swap and cap 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.

Notes_Payable_Tables

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Summary of principal payments of notes payable	The following table summarizes our notes payable as of December 31, 2014, (in thousands):
	Principal payments due in:
	2015	$	291,862
	2016	555,699
	2017	130,021
	2018	1,622
	2019	126,723
	Thereafter	88,396
	Unamortized discount	(238		)
	Total (1)	$	1,194,085
	____________
	(1) Excludes approximately $97.3 million of notes payable related to real estate held for sale. These notes mature in 2016.

Equity_Tables

Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	The following is a summary of the number of restricted stock units outstanding as of December 31, 2014 and 2013:
		December 31, 2014		December 31, 2013
	Outstanding at the beginning of the year	37,407		—
	Issued (1)	45,636		37,407
	Outstanding at the end of the period	83,043		37,407
	_____________
	(1) Units issued in 2014 had a grant price of $4.20 per unit. Units issued in 2013 had a grant price of $4.01 per unit. As of December 31, 2014, 37,407 units are vested.
Schedule of Share-based Compensation, Activity [Table Text Block]	The following is a summary of the number of shares of restricted stock outstanding as of December 31, 2014 and 2013:
		December 31, 2014		31-Dec-13
	Outstanding at the beginning of the year	423,325		—
	Issued (1)	450,065		429,560
	Forfeiture	(56,183	)	(6,235	)
	Restrictions lapsed (2)	(105,831	)	—
	Outstanding at the end of the period	711,376		423,325
	_____________
	(1) Shares issued in 2014 had a grant price of $4.20 per share. Shares issued in 2013 had a grant price of $4.01 per share.
	(2) 33,592 of these shares were surrendered to pay withholding tax.

Related_Party_Transactions_Sch

Related Party Transactions Schedule of Related Party Transaction (Tables)	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	The following is a summary of the related party fees and costs we incurred with these entities during the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014		2013		2012
	BHT Advisors, acquisition fees	$	704	$	934	$	106
	BHT Advisors, debt financing fees	—		—		660
	BHT Advisors, asset management fee	—		—		10,484
	BHT Advisors, other fees and reimbursement for services provided	2,328		2,426		3,766
	HPT Management, property and construction management fees	11,369		13,191		13,931
	HPT Management, reimbursement of costs and expenses	18,557		21,022		23,537
	Total	$	32,958	$	37,573	$	52,484
	Expensed	$	30,909	$	35,356	$	50,668
	Capitalized to deferred financing fees	—		—		660
	Capitalized to real estate under development	487		934		106
	Capitalized to buildings and improvements, net	1,562		1,283		1,050
	Total	$	32,958	$	37,573	$	52,484

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental cash flow information	Supplemental cash flow information is summarized below for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		2014		2013		2012
	Interest paid, net of amounts capitalized	$	82,819	$	106,946	$	118,530
	Income taxes paid	$	1,054	$	1,440	$	1,232
	Non-cash investing activities:
	Property and equipment additions in accounts payable and accrued liabilities	$	26,193	$	25,666	$	25,751
	Amortization of deferred financing fees in building and improvements, net	$	913	$	—	$	—
	Transfer of real estate and lease intangibles through cancellation of debt	$	—	$	52,361	$	32,700
	Transfer of investment through cancellation of debt	$	—	$	—	$	4,259
	Sale of real estate and lease intangibles to unconsolidated joint venture	$	—	$	60,660	$	—
	Acquisition of real estate through exchange of real estate	$	62,578	$	—	$	—
	Non-cash financing activities:
	Common stock issued in distribution reinvestment plan	$	—	$	—	$	13,066
	Assumption of debt by unconsolidated joint venture	$	—	$	82,291	$	—
	Mortgage notes assumed by purchaser	$	—	$	24,250	$	73,119
	Cancellation of debt through transfer of real estate	$	—	$	57,934	$	59,251
	Cancellation of debt through discounted payoff	$	—	$	9,530	$	—
	Accretion of Series A Convertible Preferred Stock	$	1,926	$	—	$	—
	Issuance of Series A Convertible Preferred Stock	$	—	$	—	$	2,700
	Financing costs in accrued liabilities	$	11	$	65	$	—

Discontinued_Operations_and_Re1

Discontinued Operations and Real Estate Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule of results of operations for real estate properties reclassified as discontinued operations	The results of operations of the disposed and held for sale properties have been reclassified as discontinued operations in the accompanying consolidated statements of operations and comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012, as summarized in the following table (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Rental revenue	$	59,118		$	125,471		$	166,168
	Expenses
	Property operating expenses	19,285			36,910			50,718
	Interest expense	20,023			28,402			40,730
	Real estate taxes	10,225			20,889			26,682
	Property and asset management fees	1,738			3,553			8,468
	Asset impairment losses	8,225			4,879			25,996
	Depreciation and amortization	26,198			52,239			68,951
	Total expenses	85,694			146,872			221,545
	Provision for income taxes	—			(1		)	(7		)
	Loss on early extinguishment of debt (1)	(15,136		)	(1,416		)	—
	Gain on troubled debt restructuring	—			36,726			35,421
	Interest and other income (expense)	(13		)	9			220
	Income (loss) from discontinued operations	$	(41,725	)	$	13,917		$	(19,743	)
	_____________
	(1) The loss on early extinguishment of debt was comprised of write-off of deferred financing fees and early termination fees associated with the sale of certain properties and the payoff of related debt.
Schedule of major classes of real estate and related assets and obligations held for sale	The major classes of assets and obligations associated with real estate held for sale are as follows (in thousands):
			31-Dec-14
	Land		$	10,977
	Buildings and improvements, net of approximately $38.0 million in accumulated depreciation		108,891
	Accounts receivable and other assets, net of approximately $0.1 million in allowance for doubtful accounts		7,290
	Lease intangibles, net of approximately $15.5 million in accumulated amortization		10,482
	Assets associated with real estate held for sale		$	137,640
	Notes payable		$	97,257
	Acquired below-market leases, net of approximately $3.2 million in accumulated amortization		1,513
	Other liabilities		9,573
	Obligations associated with real estate held for sale		$	108,343

Quarterly_Results_Unaudited_Qu

Quarterly Results (Unaudited) Quarterly Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2014 and 2013 (in thousands, except per share data):
	2014 Quarters Ended	March 31			June 30			September 30			December 31
	Rental revenue	$	68,298		$	69,518		$	70,456		$	72,870
	Loss from continuing operations	$	(16,666	)	$	(13,597	)	$	(13,693	)	$	(20,068	)
	Income (loss) from discontinued operations	(12,991		)	(3,703		)	(2,687		)	67,877
	Net income (loss)	$	(29,657	)	$	(17,300	)	$	(16,380	)	$	47,809
	Net income (loss) attributable to common stockholders	$	(29,614	)	$	(17,279	)	$	(16,355	)	$	45,806
	Basic and diluted weighted average common shares outstanding	299,229			299,264			299,264			299,264
	Basic and diluted income (loss) per common share	$	(0.10	)	$	(0.06	)	$	(0.05	)	$	0.15
	2013 Quarters Ended	March 31			June 30			September 30			December 31
	Rental revenue	$	70,605		$	71,233		$	71,230		$	69,003
	Income (loss) from continuing operations before gain on sale of assets	$	(18,941	)	$	(18,906	)	$	(19,668	)	$	3,043
	Income (loss) from discontinued operations	6,817			(1,262		)	26,816			21,982
	Gain on sale of assets	16,102			—			—			—
	Net income (loss)	$	3,978		$	(20,168	)	$	7,148		$	25,025
	Net income (loss) attributable to common stockholders	$	3,966		$	(20,137	)	$	6,719		$	25,004
	Basic and diluted weighted average common shares outstanding	299,192			299,192			299,192			299,192
	Basic and diluted income (loss) per common share	$	0.01		$	(0.07	)	$	0.02		$	0.08

Business_Details

Business (Details)	Dec. 31, 2014
	state
	property
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of properties in which ownership interest is held by the entity	37
Number of recently developed non-operating properties	1
Number of states in which the entity owned interests in properties	14

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Real Estate) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accumulated depreciation and amortization related to real estate properties and related lease intangibles
Period For Change In Initial Valuation From Acquisition Date	12 months
Useful life	25 years
Real estate properties
Buildings and improvements, net	$1,482,336	$1,668,799
Intangible assets
Lease intangibles, net	94,690	134,364
Intangible liabilities
Net	16,984	24,570
Other Lease Intangibles
Intangible assets
Cost	215,913	305,233
Less: accumulated depreciation and amortization	-123,242	-177,088
Lease intangibles, net	92,671	128,145
Acquired Above-Market Leases
Intangible assets
Cost	11,785	19,264
Less: accumulated depreciation and amortization	-9,766	-13,045
Lease intangibles, net	2,019	6,219
Acquired Below-Market Leases
Intangible liabilities
Cost	-59,605	-76,750
Less: accumulated depreciation and amortization	42,621	52,180
Net	-16,984	-24,570
Leases, Acquired-in-Place, Amortization [Member]
Anticipated amortization associated with the acquired lease intangibles for each of the following five years
2015	5,777
2016	3,027
2017	2,265
2018	1,541
2019	1,695
Building and Building Improvements [Member]
Real estate properties
Cost	2,039,765	2,255,384
Less: accumulated depreciation and amortization	-557,429	-586,585
Buildings and improvements, net	$1,482,336	$1,668,799

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Details 2) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 04, 2012
	property	property
Schedule of Real Estate Properties and Related Lease Intangibles [Line Items]
Asset impairment losses	$13,165,000	$4,879,000	$98,050,000
Accounts Receivable, net
Straight-line rental revenue receivable	73,266,000	88,370,000
Tenant receivables	10,165,000	9,389,000
Non-tenant receivables	1,150,000	714,000
Allowance for doubtful accounts	-1,201,000	-1,289,000
Total accounts receivable	83,380,000	97,184,000
Deferred Financing Fees, Net [Abstract]
Deferred Finance Costs, Gross	24,704,000	26,044,000
Accumulated amortization of deferred financing fees	-13,921,000	-16,066,000
Deferred financing fees, net of accumulated amortization	10,783,000	9,978,000
Other Intangible Assets
Intangible Assets, Gross (Including Goodwill)	2,978,000	2,978,000
Intangible Assets, Accumulated Amortization	-834,000	-715,000
Intangible Assets, Net (Including Goodwill)	2,144,000	2,263,000
Anticipated amortization associated with other intangible assets for each of the following five years
2015	119,000
2016	119,000
2017	119,000
2018	119,000
2019	119,000
Real Estate Held for Sale
Disposal Group Number of Properties Held for Sale	3	0
Revenue Recognition
Net increase in rental revenues due to straight-line rent adjustments	6,400,000	6,400,000	16,100,000
Amortization of above and below market leases	4,133,000	9,540,000	11,741,000
Lease termination fee revenue	2,700,000	2,300,000	1,200,000
Consolidated Entities
Schedule of Real Estate Properties and Related Lease Intangibles [Line Items]
Asset impairment losses	13,200,000	4,900,000	98,100,000
Unconsolidated Entities [Member]
Schedule of Real Estate Properties and Related Lease Intangibles [Line Items]
Asset impairment losses	$0	$0	$0
Behringer Harvard Reit I Services Holdings Llc [Member]
Valuation of Series A Convertible Preferred Stock
Stock issued during period in exchange of surrender of non-participating and non-voting convertible stock				10,000
Wanamaker Building [Member]
Equity Method Investments and Joint Ventures [Abstract]
Ownership Interest (as a percent)	60.00%	60.00%
Percentage of ownership vote needed for major decision	70.00%

Summary_of_Significant_Account5

Summary of Significant Accounting Policies (Income Tax - 401K) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Amortization of restricted shares and units	$1,397,000	$820,000	$0
401 (k) Plan
Maximum annual contribution per employee, percent	100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$200,000	$300,000	$0
Geographic Concentration of Credit Risk [Abstract]
Concentration Risk, Percentage	47.00%	47.00%	44.00%

Summary_of_Significant_Account6

Summary of Significant Accounting Policies (EPS and Segments) (Details)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Number of Reportable Segments	1

Fair_Value_Measurements_Detail

Fair Value Measurements (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value Measurements
Real Estate Investment Property, Net	$1,768,766,000	$2,037,575,000
Asset Impairment Charges Including Discontinued Operations	13,165,000	4,879,000	98,050,000
Discontinued Operation Asset Impairment Losses		4,900,000
Impairment of Real Estate	4,940,000	0
Assets associated with real estate held for sale	137,640,000	0
Disposal Group Including Discontinued Operation Asset Impairment Losses	-8,225,000	-4,879,000	-25,996,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements
Derivative Liability	789,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements
Derivative Liability	0
Fair Value, Measurements, Recurring [Member] | Level 2
Fair Value Measurements
Derivative Liability	789,000
Fair Value, Measurements, Recurring [Member] | Level 3
Fair Value Measurements
Derivative Liability	0
Nonrecurring basis | Estimate of Fair Value Measurement [Member]
Fair Value Measurements
Real Estate Investment Property, Net	11,489,000
Assets associated with real estate held for sale	42,000,000
Nonrecurring basis | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements
Real Estate Investment Property, Net	0
Assets associated with real estate held for sale	0
Nonrecurring basis | Level 2
Fair Value Measurements
Real Estate Investment Property, Net	11,489,000
Assets associated with real estate held for sale	0
Nonrecurring basis | Level 3
Fair Value Measurements
Real Estate Investment Property, Net	0
Nonrecurring basis | Level 3 | Real estate on which impairment losses were recognized
Fair Value Measurements
Fair value of assets at impairment	$42,000,000
Nonrecurring basis | Level 3 | Real estate on which impairment losses were recognized | Discounted Cash Flow
Fair Value Measurements
Discount rate (as a percent)	10.00%
Terminal capitalization rate (as a percent)	9.00%
Market rent growth rate (as a percent)	2.00%
Nonrecurring basis | Level 3 | Real estate on which impairment losses were recognized | Discounted Cash Flow | Minimum
Fair Value Measurements
Expense growth rate (as a percent)	2.00%
Nonrecurring basis | Level 3 | Real estate on which impairment losses were recognized | Discounted Cash Flow | Maximum
Fair Value Measurements
Expense growth rate (as a percent)	3.00%

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 3) (Level 2, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value
Financial Instruments not Reported at Fair Value
Notes Payable	$1,216,991	$1,510,691
Notes Payable held for sale, Fair Value Disclosure	95,011	0
Carrying Amount
Financial Instruments not Reported at Fair Value
Notes Payable	1,194,085	1,490,367
Notes Payable held for sale, Fair Value Disclosure	$97,257	$0

Real_Estate_Activities_Details

Real Estate Activities (Details) (USD $)

3 Months Ended

12 Months Ended

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Sep. 16, 2014

Dec. 19, 2014

Feb. 15, 2013

Mar. 22, 2013

2-May-13

13-May-13

Sep. 12, 2013

Aug. 30, 2013

Sep. 13, 2013

Nov. 14, 2013

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

Disposal of real estate properties

Business Acquisition, Pro Forma Revenue

$287,798,000

$288,903,000

Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax

-62,738,000

-52,908,000

Land

286,430,000

317,632,000

286,430,000

317,632,000

Buildings and improvements, net

1,482,336,000

1,668,799,000

1,482,336,000

1,668,799,000

Lease intangibles, net

94,690,000

134,364,000

94,690,000

134,364,000

Acquired below-market leases, net

-16,984,000

-24,570,000

-16,984,000

-24,570,000

Proceeds from sale of discontinued operations

242,800,000

495,866,000

111,142,000

Mortgage notes assumed by purchaser

0

24,250,000

73,119,000

Repayments of debt

217,800,000

407,000,000

Business Acquisition, Pro Forma Net Income (Loss)

-16,158,000

17,114,000

Basic and diluted weighted average common shares outstanding

299,264,000

299,264,000

299,264,000

299,229,000

299,192,000

299,192,000

299,192,000

299,192,000

299,255,392

299,191,861

298,372,324

Business Acquisition, Pro Forma Earnings Per Share, Basic

($0.05)

$0.06

City Hall Plaza Manchester Nh [Member]

Disposal of real estate properties

Rentable square footage

210,000

Contract sale price

19,750,000

Proceeds from sale of discontinued operations

19,130,000

222 South Riverside Plaza Chicago Illinois [Member]

Disposal of real estate properties

Rentable square footage

1,184,000

Contract sale price

247,000,000

Proceeds from sale of discontinued operations

223,670,000

600 & 619 Alexander Road [Member]

Disposal of real estate properties

Rentable square footage

97,000

Contract sale price

9,600,000

Proceeds from sale of discontinued operations

9,128,000

5 & 15 Wayside Burlington Ma [Member]

Disposal of real estate properties

Rentable square footage

270,000

Contract sale price

69,321,000

Proceeds from sale of discontinued operations

65,652,000

Riverview Tower Knoxville Tn [Member]

Disposal of real estate properties

Rentable square footage

334,000

Contract sale price

24,250,000

Proceeds from sale of discontinued operations

0

Epic Center [Member]

Disposal of real estate properties

Rentable square footage

289,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

One Brittany Place [Member]

Disposal of real estate properties

Rentable square footage

57,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

Two Brittany Place [Member]

Disposal of real estate properties

Rentable square footage

58,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

Energy Centre New Orleans La [Member]

Disposal of real estate properties

Rentable square footage

757,000

Contract sale price

86,500,000

Proceeds from sale of discontinued operations

80,720,000

Tice Building Woodcliff Lake Nj [Member]

Disposal of real estate properties

Rentable square footage

120,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

One Edgewater Plaza [Member]

Disposal of real estate properties

Rentable square footage

252,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

Ashford Perimeter Atlanta Ga [Member]

Disposal of real estate properties

Rentable square footage

288,000

[1]

Contract sale price

0

[1]

Proceeds from sale of discontinued operations

0

[1]

10 & 120 South Riverside Chicago Il

Disposal of real estate properties

Rentable square footage

1,411,000

Contract sale price

361,000,000

Proceeds from sale of discontinued operations

340,366,000

Disposed Properties [Member]

Disposal of real estate properties

Rentable square footage

1,394,000

3,933,000

1,394,000

3,933,000

Proceeds from sale of discontinued operations

242,800,000

[2]

495,866,000

[2]

5950 Sherry Lane Dallas Tx [Member]

Disposal of real estate properties

Land

10,002,000

Buildings and improvements, net

50,876,000

Lease intangibles, net

3,809,000

Acquired below-market leases, net

-2,109,000

Rentable square footage

197,000

Contract Purchase Price

$62,578,000

[1]

Ownership of each of these properties was transferred to the lender pursuant to a foreclosure or deed-in-lieu of foreclosure.

[2]

In 2014, proceeds from sale include approximately $217.8 million in debt paid off with the proceeds of the sale of these properties. In 2013, proceeds from sale are reduced by approximately $24.3 million in debt assumed by the purchasers and includes approximately $407.0 million in debt paid off with the proceeds of the sale of these properties.

Investments_in_Unconsolidated_2

Investments in Unconsolidated Entities (Details) (USD $)	3 Months Ended					12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Investments in unconsolidated entities
Economic interest (as a percent)	30.00%						30.00%
Amount of investment	$41,762,000					$39,885,000	$41,762,000
Notes payable	1,490,367,000					1,194,085,000	1,490,367,000
Equity in earnings of investments						1,836,000	24,547,000		1,725,000
Distributions from investments						3,800,000	36,300,000
Gain (Loss) on Sale of Investments							25,100,000
Additional investments in unconsolidated entities						560,000	1,500,000		1,330,000
Assumption of debt by unconsolidated joint venture						0	82,291,000		0
Proceeds from sale of property						242,800,000	495,866,000		111,142,000
Gain on sale or transfer of assets	0		0	0	16,102,000	0	16,102,000		8,083,000
Return of investments						2,702,000	36,310,000		2,278,000
Wanamaker Building
Investments in unconsolidated entities
Ownership Interest (as a percent)	60.00%					60.00%	60.00%
Amount of investment	39,229,000					38,609,000	39,229,000
200 South Wacker
Investments in unconsolidated entities
Ownership Interest (as a percent)	9.87%	[1]				0.00%	9.87%	[1]
Amount of investment	1,495,000					0	1,495,000
Paces West
Investments in unconsolidated entities
Ownership Interest (as a percent)	10.00%					10.00%	10.00%
Amount of investment	$1,038,000					$1,276,000	$1,038,000
[1]	As a result of the sale of this property in December 2013, based on the operating agreement, our economic interest was promoted to 30%.

Real_Estate_Under_Development_

Real Estate Under Development (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Real Estate Under Development [Abstract]
Development costs capitalized	$27,000,000	$45,200,000
Interest costs capitalized	2,500,000	1,100,000
Real estate under development	0	51,144,000
Available borrowings under construction loan	66,000,000
Draws on construction loan	$45,900,000

Leasing_Activity_Details

Leasing Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leases, Future Minimum Payments Receivable [Abstract]
2015	$194,041,000
2016	180,469,000
2017	159,764,000
2018	139,542,000
2019	110,050,000
Thereafter	297,766,000
Total	1,081,632,000
Operating Leases, Rent Expense, Net [Abstract]
Rent expense	2,300,000	1,200,000	1,100,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	2,223,000
2016	2,197,000
2017	1,737,000
2018	1,433,000
2019	982,000
Thereafter	19,884,000
Total	$28,456,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Minimum period of time since conversion took place	5 years
Maximum Capital Loss Carryforward Period	5 years
Normal Built-in Gains Tax Lockout Period	10 years
Temporarily Revised Built-in Gains Tax Lockout Period	5 years
built-in gain taxes		$0
Operating loss carryforwards	535,500,000
Deferred tax assets on net operating loss carryforwards	2,746,000	2,598,000
Deferred Tax Assets, Gross	6,060,000	5,235,000
Deferred Tax Assets, Valuation Allowance	3,564,000	3,234,000
IPC (US), Inc
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		55,800,000
Deferred Tax Assets, Gross		0	19,500,000
Deferred Tax Assets, Valuation Allowance		0
Valuation Allowance of Deferred Tax Assets
Operating Loss Carryforwards [Line Items]
Valuation Allowances and Reserves, Balance	3,564,000	3,234,000	22,315,000	22,385,000
Valuation Allowance of Deferred Tax Assets | IPC (US), Inc
Operating Loss Carryforwards [Line Items]
Valuation Allowances and Reserves, Balance		$0

Income_Taxes_Details_Deferred_

Income Taxes (Details - Deferred Tax Assets and Liabilities) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Capital Loss Carryforwards	$195,700,000	$223,100,000
Components of Deferred Tax Assets and Liabilities [Abstract]
Net operating losses	2,746,000	2,598,000
Depreciation and amortization	2,947,000	2,628,000
Other	367,000	9,000
Deferred tax assets, gross	6,060,000	5,235,000
Valuation allowance	-3,564,000	-3,234,000
Deferred tax assets, net	2,496,000	2,001,000
Deferred revenue	817,000	764,000
Depreciation and amortization	2,077,000	2,505,000
Other	6,000	5,000
Deferred tax liabilities	$2,900,000	$3,274,000

Income_Taxes_Details_Valuation

Income Taxes (Details - Valuation Allowance) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Operating loss carryforwards	$535,500,000
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	3,234,000	22,315,000	22,385,000
Additions charged to expense	351,000	451,000	0
Deductions	-21,000	-19,532,000	-70,000
Balance at end of year	$3,564,000	$3,234,000	$22,315,000

Income_Taxes_Income_Taxes_Deta

Income Taxes Income Taxes (Details - Net income (loss) reconciled to taxable loss) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Unrecognized tax benefit liability	$0				$0				$0	$0
Deferred Tax Assets, Capital Loss Carryforwards	195,700,000				223,100,000				195,700,000	223,100,000
Amount of net assets and liabilities at tax basis exceed book value	273,100,000				207,600,000				273,100,000	207,600,000
Effective Income Tax Reconcilation of Net Income (Loss) from Book Basis to Tax Basis [Line Items]
Income Tax Examination, Period subject to examination									3 years
Net income (loss) attributable to common stockholders	45,806,000	-16,355,000	-17,279,000	-29,614,000	25,004,000	6,719,000	-20,137,000	3,966,000	-17,442,000	15,552,000	-152,101,000
Depreciation and amortization									66,145,000	51,860,000	57,385,000
Impairment losses									13,147,000	4,870,000	73,431,000
GAAP rent adjustments									-11,510,000	-14,330,000	-22,093,000
Loss on dispositions									-62,747,000	-71,654,000	-31,538,000
(Gain) loss on troubled debt restructuring and early extinguishment of debt									15,539,000	-29,388,000	-35,757,000
Unconsolidated tax entities - primarily IPC (US), Inc.									0	-21,903,000	48,940,000
Effective Income Tax Reconciliation, Long-term capital gain									0	14,130,000	0
Effective Income Tax Reconciliation, Long-term capital loss									0	-14,130,000	0
Other									1,192,000	-1,341,000	-1,684,000
Taxable income (loss)									4,324,000	-66,334,000	-63,417,000
Deferred Tax Assets, Gross	6,060,000				5,235,000				6,060,000	5,235,000
IPC (US), Inc
Effective Income Tax Reconcilation of Net Income (Loss) from Book Basis to Tax Basis [Line Items]
Deferred Tax Assets, Gross					0					0	19,500,000
Valuation Allowance of Deferred Tax Assets
Income Tax Disclosure [Abstract]
Valuation Allowances and Reserves, Balance	3,564,000				3,234,000				3,564,000	3,234,000	22,315,000	22,385,000
Valuation Allowance of Deferred Tax Assets | IPC (US), Inc
Income Tax Disclosure [Abstract]
Valuation Allowances and Reserves, Balance					$0					$0

Income_Taxes_Details_Benefit_P

Income Taxes (Details - Benefit (Provision) Components) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	($65)	($2)	$0
State	-776	-944	-692
Total current	-841	-946	-692
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	31	84	181
State	838	344	451
Total deferred	869	428	632
Total income tax benefit (provision) - continuing operations	$28	($518)	($60)

Derivative_Instruments_and_Hed2

Derivative Instruments and Hedging Activities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative Instruments and Hedging Activities
Derivative, Number of Instruments Held		0
Derivatives designated as hedging instruments
Derivative Liabilities
Derivative financial instruments	($789)	$0
Interest Rate Swap [Member] | Derivatives designated as hedging instruments
Derivative Liabilities
Derivative financial instruments	($789)	$0

Derivative_Instruments_and_Hed3

Derivative Instruments and Hedging Activities (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Derivative Instruments and Hedging Activities
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$2,800,000
Period Over Which Default Must be Remedied	30 days
Minimum amount of debt default that could cause derivative obligations to also be in default	25,000,000
Derivative, Net Liability Position, Aggregate Fair Value	1,000,000
Swap Number One [Member]
Derivative Instruments and Hedging Activities
Derivative, Notional Amount	125,000,000
Derivative, Fixed Interest Rate	1.68%
Swap Number Two [Member]
Derivative Instruments and Hedging Activities
Derivative, Notional Amount	125,000,000
Derivative, Fixed Interest Rate	1.69%
Cash Flow Hedging
Derivative Instruments and Hedging Activities
Gain (loss) recognized in OCI on derivative (effective portion)	-789,000		1,679,000		-772,000
Amount reclassified from OCI into income (effective portion)	5,000		1,006,000		903,000
Cash Flow Hedging | Interest expense
Derivative Instruments and Hedging Activities
Amount reclassified from OCI into income (effective portion)	5,000	[1]	1,006,000	[1]	903,000	[1]
Cash Flow Hedging | Interest rate caps
Derivative Instruments and Hedging Activities
Gain (loss) recognized in OCI on derivative (effective portion)	0		251,000		34,000
Cash Flow Hedging | Interest rate swaps
Derivative Instruments and Hedging Activities
Gain (loss) recognized in OCI on derivative (effective portion)	($789,000)		$1,428,000		($806,000)
[1]	Increases in fair value as a result of accrued interest associated with our swap and cap 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.

Notes_Payable_Details

Notes Payable (Details) (USD $)	12 Months Ended		3 Months Ended
	Dec. 31, 2014		Mar. 31, 2015	Dec. 31, 2013
	property
Long-term debt
Notes payable, Held for Sale	$97,257,000
Draws on construction loan	45,900,000
Principal payments due in:
Total	1,194,085,000			1,490,367,000
Number of real estate properties held as collateral	10
Notes payable
Long-term debt
Stated annual interest rate, low end of range (as a percent)	3.04%
Stated annual interest rate, high end of range (as a percent)	6.22%
Overall effective weighted average interest rate (as a percent)	5.34%
Principal payments due in:
2015	291,862,000
2016	555,699,000
2017	130,021,000
2018	1,622,000
2019	126,723,000
Thereafter	88,396,000
unamortized discount	-238,000
Total	1,194,085,000	[1]		1,500,000,000
Mezzanine Loan One [Member] | Notes payable
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	9.80%
Subsequent Event [Member]
Principal payments due in:
Repayments of Secured Debt			$168,300,000
[1]	Excludes approximately $97.3 million of notes payable related to real estate held for sale. These notes mature in 2016.

Notes_Payable_Credit_Facility_

Notes Payable (Credit Facility) (Details) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	property
Credit Facility
Maximum borrowings available	$475
LIBOR interest index Period One	1 month
LIBOR interest index Period Two	3 months
LIBOR Interest Index Period Three	6 months
Line of Credit Facility, Maximum Increase to Capacity after Lender Approval	225
Line of Credit Facility, Revolving loan extension period	1 year
Line of Credit Facility, Remaining Borrowing Capacity	47.5
Line of Credit Facility, Interest Rate (as a percent)	3.73%
Line of Credit Facility, Number of real estate properties held as collateral	7
Troubled Debt Restructuring, Debtor, Current Period, Gain (Loss) on Restructuring, Per Share, Net		$0.12	$0.12
Credit facility | Debt Instrument, Variable Federal Funds Effective Base Rate [Member]
Credit Facility
Applicable margin (as a percent)	0.50%
Credit facility | Debt Instrument Variable Rate Base Libor [Member]
Credit Facility
Applicable margin (as a percent)	1.00%
Term Loan Facility [Member]
Credit Facility
Maximum borrowings available	250
Line of Credit Facility, Fair Value of Amount Outstanding	125
Revolving Credit Facility [Member]
Credit Facility
Maximum borrowings available	225
Line of Credit Facility, Fair Value of Amount Outstanding	$0
Minimum
Credit Facility
Line of Credit, applicable margin	0.45%
Maximum
Credit Facility
Line of Credit, applicable margin	2.30%

Notes_Payable_Troubled_Debt_Re

Notes Payable (Troubled Debt Restructuring) (Details) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
		property	property
Debt Disclosure [Abstract]
Gain on troubled debt restructuring	$0	$36.70	$35.60
Number of Properties Sold		2
Number of Properties transferred to the associated lender		3	2
Troubled Debt Restructuring, Debtor, Current Period, Gain (Loss) on Restructuring, Per Share, Net		$0.12	$0.12

Equity_Details

Equity (Details) (USD $)	0 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 04, 2012	Dec. 31, 2014	Dec. 31, 2013
Schedule of Capitalization, Equity [Line Items]
Fair value of preferred stock		$4,626	$2,700
Tier Operating Partnership LP [Member]
Schedule of Capitalization, Equity [Line Items]
Units of limited partnership interest held by third parties (in shares)		432,586
Behringer Harvard Reit I Services Holdings Llc [Member]
Schedule of Capitalization, Equity [Line Items]
Stock issued during period in exchange of surrender of non-participating and non-voting convertible preferred stock	10,000
Fair value of preferred stock	$2,700	$4,600

Equity_Stock_Plans_Details

Equity (Stock Plans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Plans
Restricted stock units outstanding	83,043	37,407	0
Restricted Stock Units, vesting period	13 months
Restricted Stock Units Issued	45,636	37,407
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	711,376	423,325	0
Stock Issued During Period, Shares, Share-based Compensation, Gross	450,065	429,560
Stock Issued during period, Value, Restricted Stock Award (in dollars per share)	$4.20	$4.01
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited	-56,183	-6,235
Share-Based Compensation, restrictions lapsed, number of shares	105,831	0
Units Issued during period, Value, Restricted Stock Award (in dollars per share)	$4.20	$4.01
Restricted stock units, vested	37,407
Shares Paid for Tax Withholding for Share Based Compensation	33,592
Share-Based Compensation, percentage of restrictions that lapse	25.00%
Number of years over which restrictions lapse	4 years
Stock options
Stock Plans
Exercisable period	1 year
Stock options | Maximum
Stock Plans
Term of options	10 years
Stock options | Independent Directors [Member]
Stock Plans
Options outstanding (in shares)	75,000	75,000,000
Weighted average exercise price (in dollars per share)	$6.69	$6,690

Equity_Equity_Distributions_De

Equity Equity (Distributions) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Common Stock Dividends Per Share Declared Per Month	$0	$0	$0.01
Common Stock Annual Distribution Rate			1.00%
Share Price, used to calculation annual distribution rate on common stock			$10

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
General and administrative	$19,058,000	$17,322,000	$15,480,000
Related party transaction, amounts of transaction	32,958,000	37,573,000	52,484,000
Expensed	30,909,000	35,356,000	50,668,000
Costs capitalized to deferred financing fees	0	0	660,000
Costs capitalized to real estate under development	487,000	934,000	106,000
Costs capitalized to building and improvements	1,562,000	1,283,000	1,050,000
Payables to related parties	2,041,000	2,034,000
BHT Advisors LLC [Member]
Related Party Transaction [Line Items]
Notification period	90 days
Related party transaction expenses for use of tangible assets and license			1,500,000
Intangible assets			1,400,000
General and administrative			100,000
Acquisition fee	704,000	934,000	106,000
Amount of debt financing fees	0	0	660,000
Asset management fees	0	0	10,484,000
Other fees and reimbursement for services provided	2,328,000	2,426,000	3,766,000
Gross service charge payable multiplier to determine termination payment	0.75
Period over which services payable would be calculated	12 months
HPT Management
Related Party Transaction [Line Items]
Notification period	90 days
Gross Management and Oversight Fees Earned Multiplier to Derive Buyout Consideration	0.8
Property and construction management fees	11,369,000	13,191,000	13,931,000
Amount of reimbursement of costs and expenses	$18,557,000	$21,022,000	$23,537,000
Period over which services payable would be calculated	12 months

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Commitments for future tenant improvements and leasing commissions
Commitments and contingencies
Future tenant improvements and leasing commissions	$45.40
Employment Agreements
Commitments and contingencies
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
Lump sum compensation expense if termination of employment without cause	$9.60

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Elements [Abstract]
Interest paid, net of amounts capitalized	$82,819	$106,946	$118,530
Income taxes paid	1,054	1,440	1,232
Non-cash investing activities:
Property and equipment additions in accounts payable and accrued liabilities	26,193	25,666	25,751
Amortization of deferred financing fees in building and improvements, net	913	0	0
Transfer of real estate and lease intangibles through cancellation of debt	0	52,361	32,700
Transfer of investment through cancellation of debt	0	0	4,259
Sale of real estate and lease intangibles to Unconsolidated Joint Venture	0	60,660	0
Real Estate acquired though exchange	62,578	0	0
Non-cash financing activities:
Common stock issued in distribution reinvestment plan	0	0	13,066
Assumption of debt by unconsolidated joint venture	0	82,291	0
Mortgage notes assumed by purchaser	0	24,250	73,119
Cancellation of debt through transfer of real estate	0	57,934	59,251
Cancellation of debt through discounted payoff	0	9,530	0
Accretion of Series A Convertible Preferred Stock	1,926	0	0
Issuance of Series A Convertible Preferred Stock	0	0	2,700
Financing costs in accrued liabilities	$11	$65	$0

Discontinued_Operations_and_Re2

Discontinued Operations and Real Estate Held for Sale (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
	property		property		property
Discontinued Operations and Disposal Groups [Abstract]
Disposal Group Number of Properties Disposed	2		11		5
Disposal Group Number of Properties Held for Sale	3		0
Results of operations reclassified as discontinued operations
Rental revenue	$59,118		$125,471		$166,168
Expenses
Property operating expenses	19,285		36,910		50,718
Interest expense	20,023		28,402		40,730
Real estate taxes	10,225		20,889		26,682
Property and asset management fees	1,738		3,553		8,468
Asset impairment losses	8,225		4,879		25,996
Depreciation and amortization	26,198		52,239		68,951
Total expenses	85,694		146,872		221,545
Provision for income taxes	0		-1		-7
Loss on early extinguishment of debt	-15,136	[1]	-1,416	[1]	0	[1]
Gain on troubled debt restructuring	0		36,726		35,421
Interest and other income (expense)	-13		9		220
Income (loss) from discontinued operations	($41,725)		$13,917		($19,743)
[1]	The loss on early extinguishment of debt was comprised of write-off of deferred financing fees and early termination fees associated with the sale of certain properties and the payoff of related debt.

Discontinued_Operations_and_Re3

Discontinued Operations and Real Estate Held for Sale (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	property	property
Discontinued Operations and Disposal Groups [Abstract]
Disposal Group Number of Properties Held for Sale	3	0
Long Lived Assets Held-for-sale [Line Items]
Allowance for Doubtful Accounts Receivable	$1,201	$1,289
Assets held for sale
Land	286,430	317,632
Buildings and improvements, net	1,482,336	1,668,799
Accounts receivable, net	83,380	97,184
Lease intangibles, net	94,690	134,364
Assets associated with real estate held for sale	137,640	0
Liabilities held for sale
Notes payable	1,194,085	1,490,367
Acquired below-market leases, net	16,984	24,570
Obligations associated with real estate held for sale	108,343	0
Assets Held-for-sale [Member]
Long Lived Assets Held-for-sale [Line Items]
Allowance for Doubtful Accounts Receivable	100
Assets held for sale
Land	10,977
Buildings and improvements, net	108,891
Accounts receivable, net	7,290
Lease intangibles, net	10,482
Liabilities held for sale
Notes payable	97,257
Acquired below-market leases, net	1,513
Other liabilities	9,573
Building and Building Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Real Estate Investment Property, Accumulated Depreciation	557,429	586,585
Assets held for sale
Buildings and improvements, net	1,482,336	1,668,799
Building and Building Improvements [Member] | Assets Held-for-sale [Member]
Long Lived Assets Held-for-sale [Line Items]
Real Estate Investment Property, Accumulated Depreciation	38,000
Leases, Acquired-in-Place, Market Adjustment [Member]
Long Lived Assets Held-for-sale [Line Items]
Finite Lived Intangible Liabilities Accumulated Amortization	-42,621	-52,180
Liabilities held for sale
Acquired below-market leases, net	-16,984	-24,570
Leases, Acquired-in-Place, Market Adjustment [Member] | Assets Held-for-sale [Member]
Long Lived Assets Held-for-sale [Line Items]
Finite Lived Intangible Liabilities Accumulated Amortization	-3,200
Lease Intangibles [Member] | Assets Held-for-sale [Member]
Long Lived Assets Held-for-sale [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$15,500

Quarterly_Results_Unaudited_Qu1

Quarterly Results (Unaudited) Quarterly Results (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Rental revenue	$72,870	$70,456	$69,518	$68,298	$69,003	$71,230	$71,233	$70,605	$281,142	$282,071	$289,466
Loss from continuing operations	-20,068	-13,693	-13,597	-16,666	3,043	-19,668	-18,906	-18,941	-64,024	-54,472	-160,831
Income (loss) from discontinued operations	67,877	-2,687	-3,703	-12,991	21,982	26,816	-1,262	6,817	48,496	54,353	387
Gain on sale or transfer of assets					0	0	0	16,102	0	16,102	8,083
Net income (loss)	47,809	-16,380	-17,300	-29,657	25,025	7,148	-20,168	3,978	-15,528	15,983	-152,361
Net income (loss) attributable to common stockholders	$45,806	($16,355)	($17,279)	($29,614)	$25,004	$6,719	($20,137)	$3,966	($17,442)	$15,552	($152,101)
Basic and diluted weighted average common shares outstanding	299,264,000	299,264,000	299,264,000	299,229,000	299,192,000	299,192,000	299,192,000	299,192,000	299,255,392	299,191,861	298,372,324
Basic and diluted income (loss) per common share	$0.15	($0.05)	($0.06)	($0.10)	$0.08	$0.02	($0.07)	$0.01	($0.06)	$0.05	($0.51)

Subsequent_Event_Details

Subsequent Event (Details) (One & Two Chestnut Place Worcester Ma, Subsequent Event [Member], USD $)	Mar. 06, 2015
In Thousands, unless otherwise specified
One & Two Chestnut Place Worcester Ma | Subsequent Event [Member]
Subsequent Event [Line Items]
Contract sale price	$14,000

Schedule_II_Details

Schedule II (Details) (Allowance for Doubtful Accounts [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$1,289	$1,263	$1,459
Charged to Costs and Expenses	725	418	467
Charged to Other Accounts	-45	0	0
Writeoffs, Net of Recoveries	-768	-392	-663
Balance at end of year	$1,201	$1,289	$1,263

Schedule_III_Details

Schedule III (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]
Estimated useful life	25 years
Aggregate cost for federal income tax purposes	$2,500,000,000
Encumbrances	1,194,085,000	[1]
Initial cost of land	309,923,000	[1]
Initial cost of buildings and improvements	1,975,464,000	[1]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	40,808,000	[1],[2]
Gross amount at which carried at close of period	2,326,195,000	[1],[3]	2,624,160,000	3,222,358,000	3,597,339,000
Accumulated depreciation	557,429,000	[1]	586,585,000	593,389,000	617,402,000
Lawson Commons St Paul Mn
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	53,793,000
Initial cost of land	2,021,000
Initial cost of buildings and improvements	75,881,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	8,012,000	[2]
Gross amount at which carried at close of period	85,914,000	[3]
Accumulated depreciation	30,191,000
Buena Vista Plaza Burbank Ca
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	20,630,000
Initial cost of land	3,806,000
Initial cost of buildings and improvements	28,368,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	534,000	[2]
Gross amount at which carried at close of period	32,708,000	[3]
Accumulated depreciation	10,772,000
1325 G Street Washington Dc
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	100,000,000
Initial cost of land	71,313,000
Initial cost of buildings and improvements	60,681,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	12,956,000	[2]
Gross amount at which carried at close of period	144,950,000	[3]
Accumulated depreciation	24,734,000
Woodcrest Corporate Center Cherry Hill Nj
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	47,460,000
Initial cost of land	5,927,000
Initial cost of buildings and improvements	49,977,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	5,033,000	[2]
Gross amount at which carried at close of period	60,937,000	[3]
Accumulated depreciation	20,637,000
Burnett Plaza Ft Worth Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	101,864,000
Initial cost of land	6,239,000
Initial cost of buildings and improvements	157,171,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	20,623,000	[2]
Gross amount at which carried at close of period	184,033,000	[3]
Accumulated depreciation	61,204,000
The Terrace Office Park Austin Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	125,781,000
Initial cost of land	17,330,000
Initial cost of buildings and improvements	124,551,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	14,192,000	[2]
Gross amount at which carried at close of period	156,073,000	[3]
Accumulated depreciation	46,304,000
Bank of America Plaza Charlotte Nc
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	150,000,000
Initial cost of land	26,656,000
Initial cost of buildings and improvements	185,215,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	21,521,000	[2]
Gross amount at which carried at close of period	233,392,000	[3]
Accumulated depreciation	65,025,000
Three Parkway Philadelphia Pa
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	64,331,000
Initial cost of land	7,905,000
Initial cost of buildings and improvements	69,033,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	13,960,000	[2]
Gross amount at which carried at close of period	90,898,000	[3]
Accumulated depreciation	25,962,000
One & Two Eldridge Place Houston Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	72,022,000
Initial cost of land	6,605,000
Initial cost of buildings and improvements	89,506,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	16,716,000	[2]
Gross amount at which carried at close of period	112,827,000	[3]
Accumulated depreciation	34,238,000
Centreport Office Center Ft Worth Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	125,000,000	[4]
Initial cost of land	3,175,000
Initial cost of buildings and improvements	12,917,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-6,233,000	[2]
Gross amount at which carried at close of period	9,859,000	[3]
Accumulated depreciation	2,704,000
FOUR40 Chicago Il
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial cost of land	23,285,000
Initial cost of buildings and improvements	265,099,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-86,910,000	[2]
Gross amount at which carried at close of period	201,474,000	[3]
Accumulated depreciation	24,140,000
111 Woodcrest Cherry Hill Nj
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial cost of land	1,000,000
Initial cost of buildings and improvements	5,417,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-853,000	[2]
Gross amount at which carried at close of period	5,564,000	[3]
Accumulated depreciation	1,422,000
1650 Arch Street Philadelphia Pa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost of land	24,000,000
Initial cost of buildings and improvements	60,825,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-19,899,000	[2]
Gross amount at which carried at close of period	64,926,000	[3]
Accumulated depreciation	14,685,000
United Plaza Philadelphia Pa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost of land	23,736,000
Initial cost of buildings and improvements	90,001,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	12,568,000	[2]
Gross amount at which carried at close of period	126,305,000	[3]
Accumulated depreciation	28,447,000
One Oxmoor Place Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	66,692,000	[5]
Initial cost of land	2,851,000
Initial cost of buildings and improvements	17,614,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,129,000	[2]
Gross amount at which carried at close of period	22,594,000	[3]
Accumulated depreciation	5,765,000
Hurstbourne Place Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	4,587,000
Initial cost of buildings and improvements	30,203,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-12,638,000	[2]
Gross amount at which carried at close of period	22,152,000	[3]
Accumulated depreciation	6,484,000
Hurstbourne Park Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	2,297,000
Initial cost of buildings and improvements	12,728,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-3,014,000	[2]
Gross amount at which carried at close of period	12,011,000	[3]
Accumulated depreciation	3,348,000
Hurstbourne Plaza Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5],[6]
Initial cost of land	4,000,000	[6]
Initial cost of buildings and improvements	10,054,000	[6]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-384,000	[2],[6]
Gross amount at which carried at close of period	13,670,000	[3],[6]
Accumulated depreciation	9,417,000	[6]
Forum Office Park Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	6,811,000
Initial cost of buildings and improvements	32,548,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,721,000	[2]
Gross amount at which carried at close of period	49,080,000	[3]
Accumulated depreciation	11,282,000
Lakeview Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	1,468,000
Initial cost of buildings and improvements	8,574,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-2,936,000	[2]
Gross amount at which carried at close of period	7,106,000	[3]
Accumulated depreciation	979,000
Steeplechase Place Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	1,766,000
Initial cost of buildings and improvements	7,424,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	1,581,000	[2]
Gross amount at which carried at close of period	10,771,000	[3]
Accumulated depreciation	2,386,000
Hunnington Louisville Ky
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[5]
Initial cost of land	978,000
Initial cost of buildings and improvements	5,507,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-404,000	[2]
Gross amount at which carried at close of period	6,081,000	[3]
Accumulated depreciation	1,483,000
One & Two Chestnut Place Worcester Ma
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost of land	2,903,000
Initial cost of buildings and improvements	15,715,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-10,070,000	[2]
Gross amount at which carried at close of period	8,548,000	[3]
Accumulated depreciation	39,000
5104 Eisenhower Boulevard Tampa Fl
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial cost of land	2,602,000
Initial cost of buildings and improvements	25,054,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	6,121,000	[2]
Gross amount at which carried at close of period	33,777,000	[3]
Accumulated depreciation	8,826,000
Plaza at MetroCenter Nashville Tn
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	23,622,000
Initial cost of land	3,341,000
Initial cost of buildings and improvements	35,333,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	-2,996,000	[2]
Gross amount at which carried at close of period	35,678,000	[3]
Accumulated depreciation	4,954,000
Loop Central Houston Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	42,486,000
Initial cost of land	11,653,000
Initial cost of buildings and improvements	86,587,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	15,958,000	[2]
Gross amount at which carried at close of period	114,198,000	[3]
Accumulated depreciation	30,541,000
801 Thompson Rockville Md
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost of land	3,200,000
Initial cost of buildings and improvements	10,578,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	108,000	[2]
Gross amount at which carried at close of period	13,886,000	[3]
Accumulated depreciation	3,028,000
500 E Pratt Baltimore Md
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	58,800,000
Initial cost of land	0
Initial cost of buildings and improvements	66,390,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,023,000	[2]
Gross amount at which carried at close of period	68,413,000	[3]
Accumulated depreciation	19,607,000
One BriarLake Plaza Houston Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	95,947,000
Initial cost of land	9,602,000
Initial cost of buildings and improvements	119,660,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	9,876,000	[2]
Gross amount at which carried at close of period	139,138,000	[3]
Accumulated depreciation	33,171,000
Two BriarLake Plaza Houston Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	45,895,000
Initial cost of land	2,446,000
Initial cost of buildings and improvements	75,687,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0	[2]
Gross amount at which carried at close of period	78,133,000	[3]
Accumulated depreciation	127,000
Colorado Building Washington Dc
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial cost of land	13,328,000
Initial cost of buildings and improvements	28,109,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	2,851,000	[2]
Gross amount at which carried at close of period	44,288,000	[3]
Accumulated depreciation	9,217,000
Three Eldridge Place Houston Tx
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0	[4]
Initial cost of land	3,090,000
Initial cost of buildings and improvements	62,181,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	10,659,000	[2]
Gross amount at which carried at close of period	75,930,000	[3]
Accumulated depreciation	16,310,000
5950 Sherry Lane Dallas Tx [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost of land	10,002,000
Initial cost of buildings and improvements	50,876,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	3,000	[2]
Gross amount at which carried at close of period	60,881,000	[3]
Accumulated depreciation	0
unamortized discount
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	-238,000
Initial cost of land	0
Initial cost of buildings and improvements	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements	0	[2]
Gross amount at which carried at close of period	0	[3]
Accumulated depreciation	$0
[1]	Excludes balances related to real estate held for sale at December 31, 2014.
[2]	Includes adjustments to basis, such as impairment losses.
[3]	The aggregate cost for federal income tax purposes is approximately $2.5 billion.
[4]	Centreport Office Center, FOUR40, 111 Woodcrest, 5104 Eisenhower Blvd., the Colorado Building, Three Eldridge Place, and 1650 Arch Street are each held as collateral for this notes payable.
[5]	One Oxmoor Place, Hurstborne Place, Hurstborne Park, Hurstborne Plaza, Forum Office Park, Lakeview, Steeplechase Place, Hunnington, and One & Two Chestnut Place are each held as collateral for this note payable.
[6]	Hurstborne Plaza is a retail shopping center. All of our other properties are office buildings.

Schedule_III_Details_2_Reconci

Schedule III (Details 2) (Reconciliation) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	$2,624,160		$3,222,358	$3,597,339
Acquisitions/improvements	160,435		98,519	76,304
Assets disposed/written-off	-458,400		-696,717	-451,285
Balance at end of the year	2,326,195	[1],[2]	2,624,160	3,222,358
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	586,585		593,389	617,402
Depreciation expense	112,394		128,599	141,046
Assets disposed/written-off	141,550		135,403	165,059
Balance at end of the year	$557,429	[1]	$586,585	$593,389
[1]	Excludes balances related to real estate held for sale at December 31, 2014.
[2]	The aggregate cost for federal income tax purposes is approximately $2.5 billion.