Black Creek Diversified Property Fund 10-K 10 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 28, 2013	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014	Feb. 28, 2014
			Class E [Member]	Class A [Member]	Class W [Member]	Class I [Member]
Document Information [Line Items]	'	'	'	'	'	'
Document Type	'10-K	'	'	'	'	'
Amendment Flag	'false	'	'	'	'	'
Document Period End Date	31-Dec-13	'	'	'	'	'
Document Fiscal Year Focus	'2013	'	'	'	'	'
Document Fiscal Period Focus	'FY	'	'	'	'	'
Entity Registrant Name	'Dividend Capital Diversified Property Fund Inc.	'	'	'	'	'
Entity Central Index Key	'0001327978	'	'	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'	'	'
Entity Well-known Seasoned Issuer	'No	'	'	'	'	'
Entity Current Reporting Status	'Yes	'	'	'	'	'
Entity Voluntary Filers	'No	'	'	'	'	'
Entity Filer Category	'Non-accelerated Filer	'	'	'	'	'
Entity Common Stock, Shares Outstanding	'	'	171,984,070	457,206	324,525	4,341,011
Entity Public Float	'	$0	'	'	'	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'		'
Investments in real property	$2,376,864		$2,819,550
Accumulated depreciation and amortization	-452,222		-482,782
Total net investments in real property	1,924,642	[1]	2,336,768	[1]
Debt related investments, net	123,935		187,321
Total net investments	2,048,577		2,524,089
Cash and cash equivalents	24,778		36,872
Restricted cash	25,550		32,968
Other assets, net	60,328		65,325
Assets held for sale	146,176	[2]	'
Total Assets	2,305,409		2,659,254
Liabilities:	'		'
Accounts payable and accrued expenses	45,769		53,221
Mortgage notes and other secured borrowings	943,045	[3]	1,319,452	[3]
Unsecured borrowings	300,000		300,000
Intangible lease liabilities, net	74,413		88,331
Other liabilities	50,503		56,723
Liabilities held for sale	86,668	[4]	'
Total Liabilities	1,500,398		1,817,727
Stockholders' equity:	'		'
Common stock, $0.01 par value; 1,000,000,000 shares authorized; 176,006,755 and 178,127,559 shares issued and outstanding, as of December 31, 2013 and December 31, 2012, respectively	1,760	[5]	1,781	[5]
Additional paid-in capital	1,582,886		1,610,996
Distributions in excess of earnings	-860,747		-850,885
Accumulated other comprehensive loss	-10,794		-16,196
Total stockholders' equity	713,105		745,696
Noncontrolling interests	91,906		95,831
Total Equity	805,011		841,527
Total Liabilities and Equity	$2,305,409		$2,659,254
[1]	Includes approximately $82.4 million and $520.3 million, after accumulated depreciation and amortization, in consolidated real property variable interest entity investments as of December 31, 2013 and 2012, respectively. (2)Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.
[2]	Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.
[3]	Includes approximately $60.7 million and $419.5 million in consolidated mortgage notes in variable interest entity investments as of December 31, 2013 and 2012, respectively.
[4]	Includes approximately $80.4 million in consolidated mortgage notes in variable interest entity investments as of DecemberB 31, 2013.
[5]	Includes 171,254,036 shares of Class E common stock, 216,745 shares of ClassB A common stock, 208,889 shares of Class W common stock, and 4,327,085 shares of Class I common stock issued and outstanding as of December 31, 2013, and 178,090,434 shares of Class E common stock, 12,375 shares of ClassB A common stock, 12,375B shares of Class W common stock, and 12,375 shares of Class I common stock issued and outstanding as of DecemberB 31, 2012.

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Common stock, par value	0.01		0.01
Common stock, shares authorized	1,000,000,000		1,000,000,000
Common stock, shares issued	176,006,755	[1]	178,127,559	[1]
Common stock, shares outstanding	176,006,755	[1]	178,127,559	[1]
Investment in real property	1,924,642,000	[2]	2,336,768,000	[2]
Class E [Member]	'		'
Common stock, shares issued	171,254,036		178,090,434
Class A [Member]	'		'
Common stock, shares issued	216,745		12,375
Class W [Member]	'		'
Common stock, shares issued	208,889		12,375
Class I [Member]	'		'
Common stock, shares issued	4,327,085		12,375
Variable Interest Entity Investments [Member]	'		'
Investment in real property	82,400,000		520,300,000
Mortgage notes	60,700,000		419,500,000
Variable Interest Entity Investments [Member] | Assets Held for Sale [Member]	'		'
Investment in real property	143,000,000		'
Variable Interest Entity Investments [Member] | Liabilities of Assets Held for Sale [Member]	'		'
Mortgage notes	80,400,000		'
[1]	Includes 171,254,036 shares of Class E common stock, 216,745 shares of ClassB A common stock, 208,889 shares of Class W common stock, and 4,327,085 shares of Class I common stock issued and outstanding as of December 31, 2013, and 178,090,434 shares of Class E common stock, 12,375 shares of ClassB A common stock, 12,375B shares of Class W common stock, and 12,375 shares of Class I common stock issued and outstanding as of DecemberB 31, 2012.
[2]	Includes approximately $82.4 million and $520.3 million, after accumulated depreciation and amortization, in consolidated real property variable interest entity investments as of December 31, 2013 and 2012, respectively. (2)Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
REVENUE:	'		'		'
Rental revenue	$207,328		$206,916		$207,750
Debt related income	10,449		9,409		11,107
Total Revenue	217,777		216,325		218,857
EXPENSES:	'		'		'
Rental expense	43,672		40,535		41,798
Real estate depreciation and amortization expense	87,174		91,127		93,407
General and administrative expenses	9,973		7,229		6,826
Advisory fees, related party	15,120		17,659		20,854
Acquisition-related expenses	337	[1]	325	[1]	610	[1]
Impairment of real estate property	2,600		5,700		23,500
Provision for loss on debt related investments	'		'		23,037
Other-than-temporary impairment on securities	0		0		3,369
Total Operating Expenses	158,876		156,875		189,901
Other Income (Expenses):	'		'		'
Interest and other income (expense)	-153		807		2,394
Interest expense	-65,325		-69,844		-74,406
Loss on extinguishment of debt and financing commitments	-2,507		-5,374		'
Loss from continuing operations	-9,084		-14,961		-43,056
Discontinued operations, net of taxes	65,554	[2]	-7,410	[2]	-21,510	[2],[3]
Net Income (loss)	56,470		-22,371		-64,566
Net (income) loss attributable to noncontrolling interests	-4,002		110		6,886
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$52,468		($22,261)		($57,680)
Net income (loss) per basic and diluted common share:	'		'		'
Continuing operations	($0.05)		($0.08)		($0.22)
Discontinued operations	$0.34		($0.04)		($0.09)
NET LOSS PER BASIC AND DILUTED COMMON SHARE	$0.29		($0.12)		($0.31)
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING	'		'		'
Basic	178,196		181,982		183,813
Diluted	191,932		197,244		197,377
[1]	Includes approximately $218,000 paid to our Advisor for the year ended December 31, 2011. We did not pay any acquisition fees to our Advisor during the years ended December 31, 2013 and 2012.
[2]	Includes approximately $2.6 million, $101,000, and $1.6 million paid to our Advisor for fees associated with the disposition of real properties during the years ended DecemberB 31, 2013, 2012, and 2011, respectively.
[3]	Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

CONSOLIDATED_STATEMENTS_OF_OPE1

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (Paid to Advisor [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Acquisition fees paid to the Advisor	$0	$0	$218,000
Discontinued Operations [Member]	'	'	'
Asset management fees related to discontinued operations	$2,600,000	$101,000	$1,600,000

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME AND LOSS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME AND LOSS [Abstract]	'	'	'
Net Income (Loss)	$56,470	($22,371)	($64,566)
Other Comprehensive Income (Loss), net of tax:	'	'	'
Net unrealized change from available-for-sale securities	'	-1,426	1,260
Unrealized change from cash flow hedging derivatives	4,975	3,963	2,837
Total Other Comprehensive Income, net of tax	4,975	2,537	4,097
Comprehensive income (loss)	61,445	-19,834	-60,469
Comprehensive (income) loss attributable to noncontrolling interests	-3,577	-87	6,605
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$57,868	($19,921)	($53,864)

CONSOLIDATED_STATEMENTS_OF_EQU

CONSOLIDATED STATEMENTS OF EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Distributions in Excess of Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Total
In Thousands, except Share data, unless otherwise specified
Beginning Balances at Dec. 31, 2010	$1,827	$1,644,249	($580,981)	($22,352)	$114,231	$1,156,974
Beginning Balances (in shares) at Dec. 31, 2010	182,717,000	'	'	'	'	'
Comprehensive income (loss):	'	'	'	'	'	'
Net income (loss)	'	'	-57,680	'	-6,886	-64,566
Net unrealized change from available-for-sale securities	'	'	'	1,174	86	1,260
Unrealized change from cash flow hedging derivatives	'	'	'	2,642	195	2,837
Common stock:	'	'	'	'	'	'
Issuance of common stock, net of offering costs (in shares)	5,274,000	'	'	'	'	'
Issuance of common stock, net of offering costs	53	45,749	'	'	'	45,802
Conversion of OP Units to common stock (in shares)	118,000	'	'	'	'	'
Conversion of OP Units to common stock	1	977	'	'	-978	'
Redemptions of common stock (in shares)	-5,778,000	'	'	'	'	'
Redemptions of common stock	-58	-48,308	'	'	'	-48,366
Amortization of stock based compensation	'	22	'	'	'	22
Distributions declared on common stock	'	'	-105,704	'	'	-105,704
Noncontrolling interests:	'	'	'	'	'	'
Contributions of noncontrolling interests	'	'	'	'	28,065	28,065
Redemptions of noncontrolling interests	'	'	'	'	-10,470	-10,470
Buyout of noncontrolling interest	'	-2,353	'	'	-4,232	-6,585
Ending Balances at Dec. 31, 2011	1,823	1,640,336	-744,365	-18,536	120,011	999,269
Ending Balances (in shares) at Dec. 31, 2011	182,331,000	'	'	'	'	'
Comprehensive income (loss):	'	'	'	'	'	'
Net income (loss)	'	'	-22,261	'	-110	-22,371
Net unrealized change from available-for-sale securities	'	'	'	-1,315	-111	-1,426
Unrealized change from cash flow hedging derivatives	'	'	'	3,655	308	3,963
Common stock:	'	'	'	'	'	'
Issuance of common stock, net of offering costs (in shares)	4,711,000	'	'	'	'	'
Issuance of common stock, net of offering costs	47	34,877	'	'	'	34,924
Conversion of OP Units to common stock (in shares)	269,000	'	'	'	'	'
Conversion of OP Units to common stock	3	2,270	'	'	-2,273	'
Redemptions of common stock (in shares)	-9,183,000	'	'	'	'	'
Redemptions of common stock	-92	-65,066	'	'	'	-65,158
Amortization of stock based compensation	'	7	'	'	'	7
Distributions declared on common stock	'	'	-84,259	'	'	-84,259
Noncontrolling interests:	'	'	'	'	'	'
Contributions of noncontrolling interests	'	'	'	'	1,053	1,053
Distributions to noncontrolling interests	'	'	'	'	-8,617	-8,617
Redemptions of noncontrolling interests	'	'	'	'	-12,785	-12,785
Buyout of noncontrolling interest	'	-1,428	'	'	-1,645	-3,073
Ending Balances at Dec. 31, 2012	1,781	1,610,996	-850,885	-16,196	95,831	841,527
Ending Balances (in shares) at Dec. 31, 2012	178,128,000	'	'	'	'	178,127,559	[1]
Comprehensive income (loss):	'	'	'	'	'	'
Net income (loss)	'	'	52,468	'	4,002	56,470
Unrealized change from cash flow hedging derivatives	'	'	'	4,621	354	4,975
Common stock:	'	'	'	'	'	'
Issuance of common stock, net of offering costs (in shares)	7,864,000	'	'	'	'	'
Issuance of common stock, net of offering costs	78	48,611	'	'	'	48,689
Redemptions of common stock (in shares)	-9,985,000	'	'	'	'	'
Redemptions of common stock	-99	-68,432	'	'	'	-68,531
Distributions declared on common stock	'	'	-62,330	'	'	-62,330
Noncontrolling interests:	'	'	'	'	'	'
Contributions of noncontrolling interests	'	'	'	'	212	212
Distributions to noncontrolling interests	'	'	'	'	-5,446	-5,446
Redemptions of noncontrolling interests	'	-5,549	'	781	-1,408	-6,176
Buyout of noncontrolling interest	'	-2,740	'	'	-1,639	-4,379
Ending Balances at Dec. 31, 2013	$1,760	$1,582,886	($860,747)	($10,794)	$91,906	$805,011
Ending Balances (in shares) at Dec. 31, 2013	176,007,000	'	'	'	'	176,006,755	[1]
[1]	Includes 171,254,036 shares of Class E common stock, 216,745 shares of ClassB A common stock, 208,889 shares of Class W common stock, and 4,327,085 shares of Class I common stock issued and outstanding as of December 31, 2013, and 178,090,434 shares of Class E common stock, 12,375 shares of ClassB A common stock, 12,375B shares of Class W common stock, and 12,375 shares of Class I common stock issued and outstanding as of DecemberB 31, 2012.

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
OPERATING ACTIVITIES:	'		'		'
Net Income (Loss)	$56,470		($22,371)		($64,566)
Adjustments to reconcile net loss to net cash provided by operating activities:	'		'		'
Real estate depreciation and amortization expense	108,191		129,116		126,890
Gain on disposition of real property	-74,306		-21,144		-13,588
Unrealized impairment loss on real property	2,600		5,700		23,500
Provision for loss on debt related investments	'		'		23,037
Other adjustments to reconcile loss to net cash provided by operating activities	9,835		14,824		9,841
Changes in operating assets and liabilities	-16,201		-11,638		-10,772
Net cash provided by operating activities	86,589		94,487		94,342
INVESTING ACTIVITIES:	'		'		'
Acquisition of real property	-48,228		'		-21,456
Capital expenditures in real property	-25,436		-21,456		-11,850
Proceeds from disposition of real property	133,485		7,081		81,651
Investment in debt related investments	-10,848		-39,958		'
Principal collections on debt related investments	29,018		7,300		43,605
Other investing activities	-5,144		7,568		-2,493
Net cash provided by (used in) investing activities	72,847		-39,465		89,457
FINANCING ACTIVITIES:	'		'		'
Mortgage note proceeds	'		15,126		'
Mortgage note principal repayments	-29,046		-291,281		-11,109
Net proceeds from revolving line of credit borrowings	'		30,000		'
Proceeds from term loan borrowings	'		270,000		'
Proceeds from other secured borrowings	'		'		19,162
Repayment of other secured borrowing	-44,256		-27,461		-471
Redemption of common shares	-66,073		-53,916		-62,588
Distributions on common stock	-41,050		-57,005		-64,458
Proceeds from sale of common stock	30,917		567		'
Offering costs for issuance of common stock	-3,812		-3,403		-91
Distributions to noncontrolling interest holders	-5,599		-9,230		-10,408
Redemption of OP Unit holder interest	-6,405		-11,944		-824
Other financing activities	-6,206		-8,050		-8,124
Net cash used in financing activities	-171,530		-146,597		-138,911
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	-12,094		-91,575		44,888
CASH AND CASH EQUIVALENTS, beginning of period	36,872		128,447		83,559
CASH AND CASH EQUIVALENTS, end of period	24,778		36,872		128,447
Supplemental Disclosure of Cash Flow Information:	'		'		'
Assumed mortgage	57,897		124,800		'
Cash paid for interest	72,352		87,935		84,113
Amount issued pursuant to the distribution reinvestment plan	21,473		34,491		45,732
Non-cash reduction of mortgage note and other secured borrowings	239,573		63,253		120,029
Non-cash disposition of real property	193,066	[1]	46,282	[1]	'
Non-cash principal collection on debt related investments	46,183		17,778		61,103
Non-cash origination of debt related investments	'		82,343		'
Non-cash investment in real property	'		125,854		'
Non-cash origination of repurchase facility	'		96,534		'
Issuances of OP Units for beneficial interests	'		'		$28,597
[1]	Represents the amount of proceeds from the disposition of real property that we did not receive in cash, primarily due to the repayment or assumption of related mortgage note borrowings by the purchaser at closing.

Organization

Organization	12 Months Ended
	Dec. 31, 2013
Organization [Abstract]	'
Organization	'
	1. ORGANIZATION
	Dividend Capital Diversified Property Fund Inc. is a Maryland corporation formed on April 11, 2005 to invest in a diverse portfolio of real property and real estate related investments. As used herein, “the Company,” “we,” “our” and “us” refer to Dividend Capital Diversified Property Fund Inc. and its consolidated subsidiaries and partnerships except where the context otherwise requires.
	We operate in a manner intended to qualify as a real estate investment trust (“REIT”) for federal income tax purposes and utilize an Umbrella Partnership Real Estate Investment Trust (“UPREIT”) organizational structure to hold all or substantially all of our assets through our operating partnership, Dividend Capital Total Realty Operating Partnership, L.P. (our “Operating Partnership”). Furthermore, our Operating Partnership wholly owns a taxable REIT subsidiary, DCTRT Leasing Corp. (the “TRS”), through which we have executed certain business transactions that might otherwise have an adverse impact on our status as a REIT if such business transactions were to occur directly or indirectly through our Operating Partnership.
	We are the sole general partner of our Operating Partnership. In addition, we have contributed 100% of the proceeds received from our offerings of common stock to our Operating Partnership in exchange for partnership units (“OP Units”) representing our interest as a limited partner of the Operating Partnership.
	Dividend Capital Total Advisors LLC (our “Advisor”), a related party, manages our day-to-day activities under the terms and conditions of an advisory agreement (as amended from time to time, the “Advisory Agreement”). Our Advisor and its affiliates receive various forms of compensation, reimbursements and fees for services relating to the investment and management of our real estate assets.
	On July 12, 2012, the Securities and Exchange Commission (the “Commission”) declared effective our Registration Statement on Form S-11 (Registration Number 333-175989) (as amended, the “Registration Statement”). The Registration Statement applies to the offer and sale (the “Offering”) of up to $3,000,000,000 of our shares of common stock, of which $2,250,000,000 of shares are expected to be offered to the public in a primary offering and $750,000,000 of shares are expected to be offered to our stockholders pursuant to an amended and restated distribution reinvestment plan (subject to our right to reallocate such amounts). In the Offering, we are offering to the public three classes of shares: Class A shares, Class W shares and Class I shares with net asset value (“NAV”) based pricing. See Part II, Item 5, and Exhibit 99.1 of this Annual Report on Form 10-K for a description of our valuation procedures and valuation components, including important disclosure regarding real property valuations provided by Altus Group U.S., Inc., an independent valuation firm. Our independent registered public accounting firm does not audit our NAV. Selling commissions, dealer manager fees, and distribution fees are allocated to Class A shares, Class W shares, and Class I shares on a class-specific basis and differ for each class, even when the NAV of each class is the same. We are offering to sell any combination of Class A shares, Class W shares and Class I shares with a dollar value up to the maximum offering amount. We also sell shares of our unclassified common stock, which we refer to as “Class E” shares, pursuant to our distribution reinvestment plan offering registered on our Registration Statement on Form S-3 (Registration Number 333-162636). In the event of a liquidation event, such assets, or the proceeds therefrom, will be distributed ratably in proportion to the respective NAV for each class until the NAV for each class has been paid. Other than differing allocable fees and expenses and liquidation rights, Class E shares, Class A shares, Class W shares, and Class I shares have identical rights and privileges.
	As of December 31, 2013, we had raised gross proceeds of approximately $32.3 million from the sale of approximately 4.7 million shares in the Offering, including approximately $121,000 through our distribution reinvestment plan. As of December 31, 2013, approximately $2,967.7 million in shares remained available for sale pursuant to the Offering, including approximately $749.9 million in shares available for sale through our distribution reinvestment plan.

Summary_Of_Significant_Account

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Summary Of Significant Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2.SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Principles of Consolidation
	Due to our control of our Operating Partnership through our sole general partnership interest and the limited rights of the limited partners, we consolidate our Operating Partnership, and limited partner interests not held by us are reflected as noncontrolling interests in the accompanying consolidated financial statements (herein referred to as “financial statements”). All significant intercompany accounts and transactions have been eliminated in consolidation.
	Our financial statements also include the accounts of our consolidated subsidiaries and joint ventures through which we are the primary beneficiary, when such subsidiaries and joint ventures are variable interest entities, or through which we have a controlling interest. In determining whether we have a controlling interest in a joint venture and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity in which we have the power to direct the activities that most significantly impact the entity’s economic performance and the obligation to absorb losses that could potentially be significant to the entity or the right to receive benefits that could potentially be significant to the entity.
	All joint ventures in which we have investments are variable interest entities. All of our investments in joint ventures represent our interests in real estate partnerships, formed for the purpose of acquiring, leasing, managing, holding for investment, selling and otherwise dealing with real property investments. Our involvement with our joint ventures affects our financial position, financial performance and cash flows in ways similar to direct ownership of real property investment. We own a significantly disproportionate majority of the ownership interests of our joint ventures. In each of our joint ventures, our joint venture partner performs the day-to-day management of the real properties owned by the respective joint ventures. However, in each of our joint ventures, we approve the activities that most significantly impact the joint venture’s economic performance. Due to our substantive approval rights and our exposure to the economic returns and losses of each of the joint ventures, we are the primary beneficiary of each of our joint ventures. Based on these considerations, we consolidate all of our investments in joint ventures. See our consolidated balance sheets for disclosure of the amount of real property and mortgage note borrowings that we consolidated through our investments in variable interest entities as of December 31, 2013 and 2012.
	Judgments made by us with respect to our level of influence or control of an entity and whether we are the primary beneficiary of a variable interest entity involve consideration of various factors, including the form of our ownership interest, the size of our investment (including loans), our ability to direct the activities of the entity, and our obligation to absorb the losses of, or, our right to receive benefits from the entity. Our ability to correctly assess our influence or control over an entity affects the presentation of these investments in our financial statements and, consequently, our financial position and specific items in our results of operations that are used by our stockholders, lenders and others in their evaluation of us. The maximum risk of loss related to our investment in these consolidated variable interest entities is limited to our recorded investments in such entities. The creditors of the consolidated variable interest entities do not have recourse to our general credit.
	Generally, we consolidate real estate partnerships and other entities that are not variable interest entities when we own, directly or indirectly, a majority voting interest in the entity.
	Reclassifications
	Certain amounts included in the accompanying financial statements for 2012 and 2011 have been reclassified to conform to the 2013 financial statement presentation. Balance sheet amounts for properties classified as held for sale have been reclassified as of December 31, 2013. Statement of operations amounts for properties disposed of or classified as held for sale have been reclassified to discontinued operations for all periods presented. Amounts in our segment and quarterly financial data disclosures in Notes 13 and 16 reflect the reclassification of amounts related to properties that have been disposed of or classified as held for sale as of December 31, 2013.
	Investments
	Real Property
	Costs associated with the acquisition of real property, including acquisition fees paid to our Advisor, are expensed as incurred. In addition, we estimate the fair value of contingent consideration and contingencies related to acquisitions of real property in determining the total cost of the property acquired. Subsequent changes in the fair value of such contingent consideration are recorded either as a gain or loss in our statement of operations. Contingencies are subsequently adjusted through the statement of operations when new information becomes available indicating that settlement of a contingent liability is probable and can be estimated at an amount greater than the acquisition date fair value, or the contingency is resolved, in which case the contingent asset or liability is derecognized.
	Costs associated with the development and improvement of our real property assets are capitalized as incurred. Costs incurred in making repairs and maintaining real estate assets are expensed as incurred. During the land development and construction periods, we capitalize interest costs, insurance, real estate taxes and certain general and administrative costs if such costs are incremental and identifiable to a specific activity to get the asset ready for its intended use. The results of operations for acquired real property are included in our accompanying statements of operations from their respective acquisition dates.
	Upon acquisition, the total cost of a property is allocated to land, building, building and land improvements, tenant improvements and intangible lease assets and liabilities. The purchase price allocation of the total cost to land, building, building improvements, tenant improvements, intangible lease assets and intangible lease liabilities is based on our estimate of the property’s as-if vacant fair value. The as-if vacant fair value is calculated by using all available information such as the replacement cost of such asset, appraisals, property condition reports, market data and other related information. The difference between the fair value and the face value of debt assumed in an acquisition is recorded as an adjustment to the purchase price allocation. The allocation of the total cost of a property to an intangible lease asset includes the value associated with the in-place leases, which may include lost rent, leasing commissions, tenant improvements, legal and other costs.
	We record acquired “above-market” and “below-market” leases at their fair value equal to the difference between the contractual amounts to be paid pursuant to each in-place lease and our estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining term of the lease plus the term of any below-market fixed-rate renewal option periods for below-market leases. In addition, we allocate a portion of the purchase price of an acquired property to the estimated value of customer relationships, if any. As of December 31, 2013, we had not recognized any estimated value to customer relationships.
	Intangible in-place lease assets are amortized over the corresponding lease term. Above-market lease assets are amortized as a reduction in rental revenue over the corresponding lease term. Below-market lease liabilities are amortized as an increase in rental revenue over the corresponding lease term, plus any applicable below-market fixed-rate renewal option periods. The following table summarizes the amounts that we have incurred in amortization expense for intangible lease assets and adjustments to rental revenue for above-market lease assets and below-market lease liabilities for the years ended December 31, 2013, 2012 and 2011 (amounts in thousands).
		For the Year Ended December 31,
		2013		2012		2011
	Above-market lease assets	$	-7,293	$	-8,050	$	-8,393
	Below-market lease liabilities		7,537		9,567		9,756
	Net increase to rental revenue	$	244	$	1,517	$	1,363
	Intangible lease asset amortization	$	-62,325	$	-80,739	$	-77,452
	We expense any unamortized intangible lease asset or record an adjustment to rental revenue for any unamortized above-market lease asset or below-market lease liability when a tenant terminates a lease before the stated lease expiration date. We recorded an insignificant amount of adjustments related to write-offs of unamortized intangible lease assets and liabilities due to early lease terminations during the years ended December 31, 2013, 2012 and 2011.
	Real property assets, including land, building, building and land improvements, tenant improvements, lease commissions, and intangible lease assets and liabilities are stated at historical cost less accumulated depreciation and amortization. Depreciation and amortization are computed on a straight-line basis over their estimated useful lives as described in the following table.
	Description		Depreciable Life
	Land		Not depreciated
	Building		40 years
	Building and land improvements		5-20 years
	Tenant improvements		Lesser of useful life or lease term
	Lease commissions		Over lease term
	Intangible in-place lease assets		Over lease term
	Above-market lease assets		Over lease term
	Below-market lease liabilities		Over lease term, including below-market fixed-rate renewal options
	The following table presents expected amortization during the next five years and thereafter related to the acquired above-market lease assets, below-market lease liabilities and acquired in-place lease intangibles, for properties owned (including properties classified as held for sale) as of December 31, 2013 (amounts in thousands).
		For the Year Ended December 31,
		2014		2015		2016		2017		2018		Thereafter		Total
	Acquired below-market lease liabilities	$	7,125	$	5,895	$	5,201	$	4,975	$	4,920	$	49,433	$	77,549
	Acquired above-market lease assets		-6,716		-6,315		-6,248		-3,711		-1,418		-1,897		-26,305
	Net rental revenue increase (decrease)	$	409	$	-420	$	-1,047	$	1,264	$	3,502	$	47,536	$	51,244
	Acquired in-place lease intangible amortization	$	47,544	$	40,203	$	37,527	$	22,382	$	12,099	$	29,002	$	188,757
	Discontinued Operations and Held for Sale
	Discontinued operations represent properties that we have either disposed of or have classified as held for sale if both the operations and cash flows of the property have been or will be eliminated from our ongoing operations as a result of the disposal transaction and if we will not have any significant continuing involvement in the operations of the property after the disposal transaction. The results of operations of properties that have been classified as discontinued operations are also reported as discontinued operations for all periods presented. We classify real property as held for sale when our management commits to a plan to sell the property, the plan has appropriate approvals, the sale of the property is probable, and certain other criteria are met. At such time, the respective assets and liabilities are presented separately on our balance sheets and depreciation is no longer recognized. Assets held for sale are reported at the lower of their carrying amount or their estimated fair value less the costs to sell the assets. We recognize an impairment loss if the current net book value of the property exceeds its fair value less selling costs.  As of December 31, 2013 and 2012, 12 and zero of our properties were classified as held for sale, respectively.
	Debt Related Investments
	Debt related investments are considered to be held for investment, as we have both the intent and ability to hold these investments until maturity. Accordingly, these assets are carried at cost, net of unamortized loan origination costs and fees, discounts, repayments and unfunded commitments unless such loans or investments are deemed to be impaired.
	Revenue Recognition
	Revenue Recognition — Real Property
	We record rental revenue for the full term of each lease on a straight-line basis. Certain properties have leases that offer the tenant a period of time where no rent is due or where rent payments increase during the term of the lease. Accordingly, we record a receivable from tenants for rent that we expect to collect over the remaining lease term rather than currently, which is recorded as straight-line rents receivable. When we acquire a property, the term of existing leases is considered to commence as of the acquisition date for purposes of this calculation. Tenant recovery income includes payments from tenants for real estate taxes, insurance and other property operating expenses and is recognized as rental revenue.
	The following table summarizes straight-line rental adjustments and tenant recovery income received from tenants for real estate taxes, insurance and other property operating expenses and recognized as rental revenue for the years ended December 31, 2013, 2012, and 2011 (amounts in thousands):
		For the Year Ended December 31,
		2013		2012		2011
	Straight-line rent adjustments	$	8,864	$	8,107	$	9,902
	Tenant recovery income	$	33,029	$	33,585	$	33,445
	Revenue Recognition — Debt Related Investments
	Interest income on debt related investments is recognized over the life of the investment using the effective interest method and is recognized on an accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan. Anticipated exit fees, where collection is expected, are also recognized over the term of the debt related investment. A debt related investment is considered to be non-performing and is placed on non-accrual status when it becomes delinquent and management determines it is probable that it will be unable to collect all amounts due according to contractual terms. While on non-accrual status, debt related investments are accounted for on a cash basis, where interest income is recognized only upon actual receipt of cash. Non-accrual debt investments are returned to accrual status when they become contractually current and management believes it will collect all amounts contractually due.
	Impairment
	Impairment — Real Property
	We review our investments in real property that are classified as held and used individually on a quarterly basis, and more frequently when such an evaluation is warranted, to determine their appropriate classification, as well as whether there are indicators of impairment.
	As of December 31, 2013, 70 of our properties are classified as held and used. These held and used assets are reviewed for indicators of impairment, which may include, among others, each tenant’s inability to make rent payments, operating losses or negative operating trends at the property level, notification by a tenant that it will not renew its lease, a decision to dispose of a property, including a change in estimated holding periods, or adverse changes in the fair value of any of our properties. If indicators of impairment exist on a held and used asset, we compare the future estimated undiscounted cash flows from the expected use of the property to its net book value to determine if impairment exists. If the sum of the future estimated undiscounted cash flows is greater than the current net book value, we conclude no impairment exists. If the sum of the future estimated undiscounted cash flows is less than its current net book value, we recognize an impairment loss for the difference between the net book value of the property and its estimated fair value. If our assumptions, projections or estimates regarding a property change in the future, we may have to record an impairment charge to reduce or further reduce the net book value of the property. See Note 3 for a discussion of impairment charges relating to our real properties recorded during the years ended December 31, 2013, 2012, and 2011.
	Impairment — Debt Related Investments
	We review our debt related investments on a quarterly basis, and more frequently when such an evaluation is warranted, to determine if impairment exists. A debt related investment is impaired when, based on current information and events including economic, industry and geographical factors, it is probable that we will be unable to collect all amounts due, both principal and interest, according to the contractual terms of the agreement. When our investment is deemed impaired, the impairment is measured based on the expected future cash flows discounted at the investment’s effective interest rate. As a practical expedient, we may measure impairment based on the fair value of the collateral of an impaired collateral-dependent investment or to measure impairment based on an observable market price for the impaired investment as an alternative to discounting expected future cash flows. Regardless of the measurement method, we measure impairment based on the fair value of the collateral when it is determined that foreclosure is probable. A debt related investment is also considered impaired if its terms are modified in a troubled debt restructuring (“TDR”). A TDR occurs when we grant a concession to a borrower in financial difficulty by modifying the original terms of the loan. Impairments on TDR loans are generally measured based on the present value of expected future cash flows discounted at the effective interest rate of the original loan. See Note 4 for a discussion of impairment charges relating to our debt related investments recorded during the years ended December 31, 2013, 2012, and 2011.
	Impairment — Real Estate Securities
	As of both December 31, 2013 and 2012, we held investments in real estate securities of approximately $0.5 million. Real estate securities are included in other assets, net, in the accompanying balance sheets.
	During the years ended December 31, 2013, 2012, and 2011, we recorded approximately $0,  $0 and $3.4 million, respectively, related to other-than-temporary impairment of our CMBS and CRE-CDO securities. Due to volatility with the credit market and its unpredictable impact for such securities, we determined that we cannot reliably predict the timing and amount of cash flows that we expect to receive related to the majority of our CMBS and CRE-CDO securities. Therefore, we account for such securities under the cost recovery method of accounting. The application of the cost recovery method of accounting requires that we cease recognizing interest income related to these securities until the amortized cost of each respective security is depleted or until we can reliably estimate cash flows. Once the amortized cost of each security is depleted or we can reasonably estimate cash flows, cash payments will be recorded to interest income. Under the cost recovery method of accounting, if the fair value of a security falls below the amortized cost of that security and we do not anticipate that the receipt of near term cash flows will sufficiently reduce the security’s amortized cost below its fair value, then we recognize an other-than-temporary impairment in an amount equal to the difference between that security’s fair value and its amortized cost.
Credit Losses
A credit loss represents the difference between the present value of expected future cash flows and the amortized cost basis of a debt security. As of both December 31, 2013 and 2012, we had recognized approximately $140.1 million of cumulative credit losses in other-than-temporary impairment related to our investments in debt securities. We recorded impairment losses of $0,  $0, and $3.4 million for each of the years ended December 31, 2013, 2012, and 2011, respectively.
Derivative Instruments and Hedging Activities
We record all derivative instruments in the accompanying balance sheets at fair value. Accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative instrument and the designation of the derivative instrument. Derivative instruments used to hedge exposure to changes in the fair value of an asset, liability, or firm commitments attributable to a particular risk, such as interest rate risk, are considered “fair value” hedges. Derivative instruments used to hedge exposure to variability in expected future cash flows, such as future interest payments, or other types of forecasted transactions, are considered “cash flow” hedges. We do not have any fair value hedges.
For derivative instruments designated as cash flow hedges, the changes in the fair value of the derivative instrument that represent changes in expected future cash flows, which are effectively hedged by the derivative instrument, are initially reported as other comprehensive income (loss) in the statement of equity until the derivative instrument is settled. Upon settlement, the effective portion of the hedge is recognized as other comprehensive income (loss) and amortized over the term of the designated cash flow or transaction the derivative instrument was intended to hedge. The change in value of any derivative instrument that is deemed to be ineffective is charged directly to earnings when the determination of hedge ineffectiveness is made. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For purposes of determining hedge ineffectiveness, management estimates the timing and potential amount of future fixed-rate debt issuances each quarter in order to estimate the cash flows of the designated hedged item or transaction. Management considers the likelihood of the timing and amount of entering into such forecasted transactions when determining the expected future fixed-rate debt issuances. We do not use derivative instruments for trading or speculative purposes. We classify cash paid to settle our forward starting swaps as financing activities in our statements of cash flows.
Cash and Cash Equivalents
Cash and cash equivalents consist of cash on hand and highly liquid investments with original maturities of three months or less such as money market mutual funds or certificates of deposits. As of both December 31, 2013 and 2012, we have not realized any losses in such cash accounts or investments and believe that we are not exposed to any significant credit risk.
Restricted Cash
Restricted cash consists primarily of lender and property-related escrow accounts. As of both December 31, 2013 and 2012, we had not realized any losses in such restricted cash accounts or investments related to, and believe that we are not exposed to any significant credit risk.
Collectability of Receivables
We evaluate the collectability of our rent and other receivables on a regular basis based on factors including, among others, payment history, the financial strength of the tenant or borrower and any guarantors. Specifically with regards to our debt related investments, we evaluate the collectability of our receivables based on factors including, among others, the value of the underlying collateral, the operations and operating trends of the underlying collateral, if any, the asset type and current economic conditions. If our evaluation of these factors indicates we may not recover the full amount of the receivable, we provide a reserve against the portion of the receivable that we estimate may not be recovered. This analysis requires us to determine whether there are factors indicating a receivable may not be fully collectible and to estimate the amount of the receivable that may not be collected. As of December 31, 2013 and 2012, we had allowances included in the caption other assets, net, in our accompanying balance sheets of approximately $251,000 and $510,000, respectively, related to our rent and other receivables. If our assumptions or estimates regarding the collectability of a receivable change in the future, we may have to record allowances to reduce or further reduce the carrying value of the receivable.
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss) as reported in the accompanying statements of equity primarily consists of the cumulative loss related to our derivatives of $8.8 million, before attribution to noncontrolling interests of $1.0 million, and cumulative gain related to our real estate securities of approximately $411,000, before attribution of a cumulative loss to noncontrolling interests of $1.3 million.
Basic and Diluted Net Income (Loss) per Common Share
Basic net income (loss) per common share is determined by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per common share includes the effects of potentially issuable common stock, but only if dilutive, including the presumed exchange of OP Units.
Income Taxes
We operate in a manner intended to qualify as a REIT for U.S. federal income tax purposes. As a REIT, we generally will not be subject to federal income taxes on net income that we distribute to our stockholders. We intend to make timely distributions sufficient to satisfy the annual distribution requirements. We believe we are organized and operate in such a manner and intend to operate in the foreseeable future in such a manner to qualify as a REIT for federal income tax purposes. We are, however, subject to certain state and local taxes. Our taxable REIT subsidiary, DCTRT Leasing Corporation, is also subject to federal, state, and local taxes.
Use of Estimates
The preparation of the financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions relating to the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ materially from those estimates. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the periods they are determined to be necessary.
New Accounting Pronouncements
In February 2013, the Financial Accounting Standards Board (the “FASB”) issued accounting standards update (“ASU”) 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation Is Fixed at the Reporting Date, (“ASU 2013-04”) which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date.  This will require an entity to measure those obligations as the sum of the amount the entity agreed to pay on the basis of its arrangement among its co-obligors as well as any additional amount the entity expects to pay on behalf of its co-obligors.  ASU 2013-04 also requires an entity to disclose the nature and amount of those obligations.  The amendments in this ASU are effective for reporting periods beginning after December 15, 2013, with early adoption permitted.  Retrospective application is required.  We do not believe that the adoption of ASU 2013-04 will have a material impact on our consolidated financial statements.
In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, that requires disclosure of the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount is required under GAAP to be reclassified in its entirety to net income. Additionally, the update requires disclosure of changes in each component of other comprehensive income. The disclosure requirements were retroactively effective for us beginning January 1, 2013. As this guidance only requires expanded disclosure, the adoption did not have a significant impact on our consolidated financial statements.

Investments_in_Real_Property

Investments in Real Property	12 Months Ended
	Dec. 31, 2013
Investments in Real Property [Abstract]	'
Investments in Real Property	'
	3. INVESTMENTS IN REAL PROPERTY
	Our consolidated investments in real property consist of investments in office, industrial and retail properties. The following tables summarize our consolidated investments in real property as of December 31, 2013 and 2012 (amounts in thousands):
	Real Property		Land			Building and Improvements			Intangible Lease Assets			Total Investment Amount			Intangible Lease Liabilities		Net Investment Amount
	As of December 31, 2013:
	Office	$	232,117		$	769,654		$	365,314		$	1,367,085		$	-15,861	$	1,351,224
	Industrial (1)		51,678			359,800			66,877			478,355			-46,626		431,729
	Retail		227,218			420,070			77,752			725,040			-51,059		673,981
	Total gross book value		511,013			1,549,524			509,943			2,570,480			-113,546		2,456,934
	Accumulated depreciation/amortization		-			-207,966			-294,881			-502,847			35,997		-466,850
	Total net book value	$	511,013		$	1,341,558		$	215,062		$	2,067,633		$	-77,549	$	1,990,084
	As of December 31, 2012:
	Office	$	218,738		$	833,226		$	457,754		$	1,509,718		$	-25,121	$	1,484,597
	Industrial		71,725			436,340			79,610			587,675			-48,432		539,243
	Retail		227,218			416,971			77,968			722,157			-51,059		671,098
	Total gross book value		517,681			1,686,537			615,332			2,819,550			-124,612		2,694,938
	Accumulated depreciation/amortization		-			-189,740			-293,042			-482,782			36,281		-446,501
	Total net book value	$	517,681		$	1,496,797		$	322,290		$	2,336,768		$	-88,331	$	2,248,437
	(1)Includes $21.1 million in land, $157.7 million in building and improvements, $14.9 million in intangible lease assets, and $5.6 million in intangible lease liabilities, before accumulated depreciation on assets of $50.6 million and accumulated amortization of intangible lease liabilities of $2.5 million, related to 12 industrial properties classified as held for sale in the accompanying balance sheet as of December 31, 2013.
	Acquisitions
	On November 7, 2013, we acquired 100% of a 269,000 square foot office property in San Francisco, CA (“655 Montgomery”). 655 Montgomery was subject to a mortgage note with a principal balance of $57.9 million as of the acquisition date bearing interest at 6.0%, which matures in June 2016. As of December 31, 2013, the unpaid principal balance of this mortgage note was $57.8 million.
	As of December 31, 2013, we have made an allocation of the fair value of the acquired assets and liabilities of 655 Montgomery to land, building, improvements and intangible lease assets and liabilities. Based on this allocation of the $109.7 million in estimated fair value of the acquired assets and liabilities of 655 Montgomery, we attributed approximately $32.6 million to land, approximately $67.8 million to building and improvements, approximately $15.9 million to intangible lease assets, approximately $1.5 million to intangible lease liabilities, and approximately $3.1 million to other liabilities and the mark-to-market adjustment on the mortgage assumed at acquisition. The weighted-average amortization periods for the intangible lease assets and intangible lease liabilities were approximately 4.4 years and 2.3 years, respectively, at the acquisition date. We have also recognized the assumed mortgage note based on an estimate of fair value of $61.7 million as of the acquisition date. We have not made any material adjustments related to this acquisition since the acquisition date.
	For the year ended December 31, 2013, our consolidated statement of operations includes aggregate revenue of $1.6 million and net operating income (as defined in Note 13) of $857,000 attributable to 655 Montgomery.
	Real Property Impairment
	During the year ended December 31, 2013, we determined that one of our wholly-owned industrial properties, located in the Silicon Valley, CA market, was unlikely to generate cash flows during our estimated investment period sufficient to recover our net book basis as of December 31, 2013. The primary factor leading to this determination was our determination that the market rental rate we could obtain, and the low demand for industrial space in the particular sub market in which the building is located, did not support our recorded carrying value. As a result of our review and based on our estimate of future cash flow and fair value of the office property, we recognized an impairment charge of approximately $2.6 million to adjust the carrying value to our estimate of fair value as of December 31, 2013.
	During the year ended December 31, 2012, we recorded a $5.7 million impairment related to an industrial property held in a joint venture in which we do not act as the managing partner. This property is included in a portfolio of industrial properties held in the same joint venture that serves as collateral for a cross-collateralized senior mortgage note. During the year ended December 31, 2012 we began to consider possible disposition opportunities for this portfolio of industrial properties. Such disposition opportunities caused us to significantly reduce our estimated holding period for these properties, triggering impairment recognition based on our estimate of future cash flows from the operation and disposition of these properties. We disposed of this property during the year ended December 31, 2013, and accordingly, the impairment charge is included within discontinued operations.
	During the year ended December 31, 2011, we determined that one of our office properties held through a joint venture in which we were not the managing partner, located in the Silicon Valley, CA market, was unlikely to generate cash flows during our estimated investment period sufficient to recover our net book basis as of December 31, 2011. The primary factor leading to this determination was our determination that the market rental rate we could obtain, and the low demand for office space in the particular sub market in which the building is located, did not support our recorded carrying value. As a result of our review and based on our estimate of future cash flow and fair value of the office property, we recognized an impairment charge of approximately $23.5 million to adjust the carrying value to our estimate of fair value as of December 31, 2011. We disposed of that property during the year ended December 31, 2012, and accordingly, the impairment charge is included within discontinued operations.
	Discontinued Operations
	During 2013, 2012, and 2011 we disposed of or classified as held for sale the following properties (dollar amounts and square footage in thousands):
	Type of Property	Market	DPF Ownership	Square Feet	Disposition Date	Gain (Loss)
	2013 Dispositions:
	Office	Dallas, TX	100.00%	62	13-Jan-13	$	1,217
	Industrial Portfolio	Various (1)	96.40%	1,918	10-May-13		-311
	Office (2)	Dallas, TX	100.00%	1,509	31-May-13		15,462
	Office	Boston, MA	100.00%	132	6-Jun-13		6,734
	Office	Denver, CO	100.00%	257	31-Jul-13		35,371
	Office	Denver, CO	100.00%	133	13-Sep-13		10,233
	Office	Chicago, IL	100.00%	100	15-Oct-13		5,580
	Total			4,111		$	74,286
	2012 Dispositions:
	Retail	Boston, MA	100.00%	19	27-Feb-12	$	-328
	Office	Silicon Valley, CA	90.00%	427	31-Jul-12		19,584
	Industrial	Louisville, KY	90.00%	164	5-Jun-12		1,857
	Total			610		$	21,113
	2011 Dispositions:
	Office	Silicon Valley, CA	97.50%	52	23-Sep-11	$	1,187
	Industrial	Cincinnati, OH	95.60%	604	17-Oct-11		-1,046
	Office	Silicon Valley, CA	100.00%	187	18-Nov-11		8,305
	Industrial	Kansas City, MO	88.60%	180	21-Nov-11		70
	Retail	Boston, MA	100.00%	46	21-Dec-11		2,266
	Total			1,069		$	10,782
	Assets held for sale
	Industrial Portfolio	Various (3)	92.50%	3,387	22-Jan-14
	Total			3,387
	(1)Industrial portfolio included seven properties located in the following markets: Philadelphia, PA, Sacramento, CA, Central Pennsylvania, Charlotte, NC, Atlanta, GA, and Chicago, IL.
	(2)During the year ended December 31, 2012, we became the 100% owner of the titleholder of a 1.5 million square foot office property in the Dallas, TX market (“Comerica Bank Tower”), as the result of our foreclosure of a non-performing mezzanine loan for which such ownership interest had served as collateral. Comerica Bank Tower was subject to a mortgage note with a principal balance of $179.8 million as of the acquisition date bearing interest at 5.8%, which matures in January 2017. On September 10, 2012, we were notified that a receiver (the “Receiver”) had been appointed for the Comerica Bank Tower. As of March 31, 2013, the unpaid principal balance of this mortgage note was $177.4 million. On May 31, 2013, Comerica Bank Tower was sold by the Receiver pursuant to court order to a purchaser unaffiliated with us. Because of the outstanding principal balance of the mortgage note, we did not receive any proceeds from the sale of Comerica Bank Tower.
	(3)Industrial portfolio included 12 properties located in the following markets: Atlanta, GA, Central Pennsylvania, Cincinnati, OH, Columbus, OH, Dallas, TX, Indianapolis, IN, and Minneapolis/St. Paul, MN.
	Assets Held for Sale
	As of December 31, 2013, we had agreed to dispose of a portfolio of 12 industrial properties to an unrelated third party. Accordingly, the assets and liabilities related to properties in this portfolio are classified as held for sale in the accompanying balance sheet as of December 31, 2013. We sold the properties on January 22, 2014. See Note 17 for additional discussion of this disposition.
	We present the results of operations of disposed properties and properties held for sale and their respective aggregate net gains (losses), collectively, as discontinued operations in our accompanying statements of operations when the operations and cash flows have been (or will be) eliminated from our ongoing operations and we will not have any significant continuing involvement. Interest expense is included in discontinued operations only if it is directly attributable to these operations or properties. The following table summarizes amounts recorded as discontinued operations (amounts in thousands):
			For the Year Ended December 31,
			2013			2012			2011 (1)
	Revenues		$	39,023		$	61,461		$	53,603
	Rental expense			-14,020			-21,731			-12,709
Real estate depreciation and amortization expense			-21,017			-37,989			-33,483
Impairment of real estate property			-			-5,700			-23,500
Interest expense			-12,662			-23,771			-18,429
Other expenses			-56			-793			-625
Income (loss) from discontinued operations, net of taxes			-8,732			-28,523			-35,143
Gain (Loss) on disposition, net of taxes			74,286			21,113			13,633
Discontinued operations, net of taxes		$	65,554		$	-7,410		$	-21,510
(1)Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.
Future Minimum Rentals
Future minimum rentals to be received under non-cancelable operating and ground leases in effect as of December 31, 2013, are as follows (amounts in thousands):
For the Years Ended December 31,		Future Minimum Rentals
2014		$	192,551
2015			181,583
2016			174,497
2017			129,026
2018			95,009
Thereafter			283,661
Total		$	1,056,327
The table above does not reflect future rental revenues from the potential renewal or replacement of existing and future leases and excludes property operating expense reimbursements and assumes no early termination of leases.
Concentration of Credit Risk
Concentration of credit risk with respect to accounts receivable currently exists due to a number of tenants whose rental payments to us make up a relatively high percentage of our rental revenue. The following is a summary, as of December 31, 2013, of the top five tenants as a percentage of consolidated annual base rent and square feet (dollar amounts and square feet in thousands):
Tenant		Locations		Industry	Annualized			% of Total Annualized Rental Revenue		Square		% of Total Portfolio Square Feet
					Rental					Feet
					Revenue (1)
Charles Schwab & Co, Inc		1		Securities, Commodities, Fin. Inv./Rel. Activites	$	22,761		11.5%		594		4.2%
Northrop Grumman		2		Professional, Scientific and Technical Services		17,532		8.9%		699		4.9%
Sybase		1		Publishing Information (except Internet)		17,283		8.8%		405		2.8%
Stop & Shop		15		Food and Beverage Stores		13,828		7.0%		872		6.1%
CEVA Freight/Logistics		3		Truck Transportation		5,198		2.6%		790		5.5%
Total		22			$	76,602		38.8%		3,360		23.5%
(1)Annualized base rent represents the annualized monthly base rent of executed leases as of December 31, 2013.
Rental revenue from our lease with Charles Schwab & Co., Inc., as master tenant of one of our office properties, represented approximately $25.5 million, or 11.7%, of our total revenue from continuing operations for the year ended December 31, 2013. Our properties in California, New Jersey, Massachusetts, and Texas accounted for approximately 20%,  16%,  16%, and 12%, respectively, of our total gross investment in real property portfolio as of December 31, 2013. A deterioration of general economic or other relevant conditions, changes in governmental laws and regulations, acts of nature, demographics or other factors in any of those states or the geographical region in which they are located could result in the loss of a tenant, a decrease in the demand for our properties and a decrease in our revenues from those markets, which in turn may have a disproportionate and material adverse effect on our results of operations and financial condition.

Debt_Related_Investments

Debt Related Investments	12 Months Ended
	Dec. 31, 2013
Debt Related Investments [Abstract]	'
Debt Related Investments	'
	4. DEBT RELATED INVESTMENTS
	As of December 31, 2013 and 2012, we had invested in 14 and 19 debt related investments, respectively. The weighted average maturity of our debt investments as of December 31, 2013 was 2.5 years, based on our recorded net investment. The following table describes our debt related income for the years ended December 31, 2013, 2012, and 2011 (dollar amounts in thousands):
			For the Year Ended December 31,								Weighted Average Yield as of
	Investment Type		2013			2012		2011			December 31, 2013 (1)
	Mortgage notes (2)		$	8,726		$	8,732	$	6,890		5.70%
	B-notes			51			433		2,371		0.00%
	Mezzanine debt			1,672			244		1,846		16.70%
	Total		$	10,449		$	9,409	$	11,107		7.10%
	(1)Weighted average yield is calculated on an unlevered basis using the amount invested, current interest rates and accretion of premiums or discounts realized upon the initial investment for each investment type as of December 31, 2013. Yields for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of December 31, 2013 for purposes of this table. As of December 31, 2013, we had one debt related investment with a net investment amount of $25.0 million that bears interest at a floating rate indexed to LIBOR. All of our remaining debt related investments bear interest at fixed rates. We have assumed a yield of zero on the one debt related investment for which we have recognized a full allowance for loss as of December 31, 2013.
	(2)We had four and three debt related investments repaid in full during the years ended December 31, 2013 and 2012, respectively. Amounts recorded include an early repayment fee received and accelerated amortization of origination fees offset by accelerated amortization of deferred due diligence costs related to these repayments.
	The following table describes our debt investment activity for the years ended December 31, 2013 and 2012 (amounts in thousands).
			Year Ended December 31,
			2013			2012
	Investment in debt related investments:
	Balance at January 1,		$	187,321		$	92,247
	Investments			12,323			121,842
	Principal repayments			-75,702			-25,093
	Amortization of deferred fees, costs, and discounts/premiums			-7			-1,675
	Provision for loan loss			-			-
	Balance at December 31,		$	123,935		$	187,321
	Debt Related Investment and Repayment Activity
	As of December 31, 2013, two of our 14 debt related investments require interest only payments.  13 of the 14 debt related investments were not subject to any delinquent principal or interest payments. Two of our debt related investments (those structured as mezzanine debt or B-notes) are subordinate to more senior positions with respect to the underlying collateral. The following table summarizes our debt related investments as of December 31, 2013 (dollar amounts in thousands).
	Description		Region		Interest Rate Fixed or Variable		Interest Rate as of	Maturity Date (2)		Face Amount of Debt (3)		Amount of Debt Related Investments
							December 31, 2013 (1)
	Mortgage note		Pacific		Fixed		7.50%	10/8/14		$	17,000	$	17,098
	Mortgage note		West North Central		Fixed		7.80%	4/1/15			9,074		9,389
	Mortgage note		Mountain		Fixed		7.70%	4/1/15			9,083		9,175
	Mortgage note		Southeast		Fixed		6.30%	2/1/18			9,213		9,570
	Mortgage note		East North Central		Fixed		6.10%	4/1/18			7,746		7,354
	Mortgage note		Northeast		Fixed		6.20%	11/1/17			3,841		3,903
	Mortgage note		Mountain		Fixed		6.20%	9/1/16			2,966		3,011
	Mortgage note		Southeast		Fixed		7.00%	3/1/19			9,170		9,331
	Mortgage note		West North Central		Fixed		6.00%	7/1/18			6,930		6,887
	Mortgage note		Southwest		Fixed		5.80%	6/1/14			3,675		3,677
	Mortgage note		Mountain		Fixed		5.20%	3/1/21			3,450		3,429
	Mortgage note		Northeast		Variable		5.20%	6/7/15			25,000		25,211
	B-note (4)		Pacific		Fixed		0.00%	1/1/11			3,000		-
	Mezzanine debt		Mid-Atlantic		Fixed		17.00%	7/1/16			15,665		15,900
	Total/weighted average						7.60%			$	125,813	$	123,935
		-1		Rates for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of December 31, 2013 for purposes of this table.
		-2		Reflects the initial maturity of the investment or any exercised options to extend and does not consider any future options to extend that are at the discretion of the borrower.
	Reflects the principal amount of the debt investment outstanding, which is net of principal repayments.
		-4		We have recorded a provision for loan loss of $3.0 million related to this B-note investment as of December 31, 2013, and we have assumed a yield of 0%.
	Repayments
	During the year ended December 31, 2013, we received full repayment of four debt investments, three of which were structured as mortgage notes and one of which was structured as a B-note. We received cash proceeds from the repayments of approximately $28.1 million, which comprised (i) principal repayment of $73.7 million, and (ii) a prepayment fee of approximately $435,000, partially offset by the repayment of borrowings secured by the debt related investments of approximately $46.2 million.
	During the year ended December 31, 2012, we received full repayment of three debt investments, all of which were structured as mortgage notes. We received cash proceeds from the repayments of approximately $5.9 million, which comprised (i) principal repayment of $22.3 million, and (ii) a prepayment fee of approximately $1.4 million, partially offset by the repayment of borrowings secured by the debt related investments of approximately $17.8 million.
	Restructure of B-note
	One of our B-note investments had been scheduled to mature in August of 2011. During the year ended December 31, 2011, we restructured the terms of that investment, which resulted in (i) an extension of the scheduled maturity to October 2012, and (ii) a change in the payment schedule that includes monthly principal amortization which equals the difference between actual LIBOR and a 4% LIBOR floor on the outstanding balance. This restructuring qualified as a troubled debt restructuring, and therefore, this B-note investment is considered an impaired investment, as further discussed below. We record interest revenue on this debt investment at LIBOR + 3.25%. As of December 31, 2012 we had recorded an asset of $12.1 million related to this debt investment. In January 2013, the borrower repaid the outstanding principal of the loan, all interest owed to us, and a return of the collateral we had posted during 2011 to maintain our controlling interest holder position on the final property sale in the portfolio.
	Impairment
	During year ended December 31, 2011, we recognized approximately $23.0 million in provision losses in the accompanying statements of operations. We did not record any provision for loan loss during the years ended December 31, 2013 and 2012. However, during the years ended December 31, 2013 and 2012, we wrote off the provision for loss on debt related investments of approximately $15.0 million and $20.0 million, respectively. The loss written off in 2013 related to one B-note debt investment loan restructuring. The loss written off in 2012 related to a mezzanine debt investment that we foreclosed upon. See Note 3 for additional discussion of this foreclosure. The table below presents a reconciliation of the beginning and ending balances, between December 31, 2012 and December 31, 2013, of our allowance for loan loss (amounts in thousands):
				Allowance for Loan Loss
	Beginning balance as of December 31, 2012:			$	18,000
		Direct write offs			-15,000
		Ending balance as of December 31, 2013:		$	3,000
	We had one and two B-note debt investments on non-accrual status as of December 31, 2013 and December 31, 2012, respectively. One of our B-note debt investments that was on non-accrual status as of December 31, 2012 was written off upon our borrower’s completion of a loan restructuring during the year ended December 31, 2013. We have recorded a complete allowance for loan loss related to our remaining debt related investment on non-accrual status. When a debt investment is on non-accrual status, we record income on the investment using the cash basis of accounting. The amount of income recorded on the cash basis of accounting was not significant during the years ended December 31, 2013, 2012, or 2011. All of our debt related investments that were past due 90 days or more were on non-accrual status as of December 31, 2013 and 2012.
	As of December 31, 2013 and 2012, we had one and three impaired debt related investments with an unpaid principal balance of approximately $3.0 million and $30.1 million, respectively. The following table describes our recorded investment in debt related investments before allowance for loan loss, and the related allowance for loan loss (amounts in thousands):
			Debt Investments Individually Evaluated for Impairment as of December 31,
			2013			2012
	Debt investments		$	126,935		$	205,321
	Less: Allowance for loan losses			-3,000			-18,000
	Total		$	123,935		$	187,321
	All impaired debt investments are subordinate debt investments. The following table describes our gross recorded investment in impaired debt related investments, the related allowance for loan loss, and the total amount of impaired loans for which we have not recorded an allowance for loan loss (amounts in thousands):
	As of:		Recorded Investment			Related Allowance		Amount of Impaired Loans With No Allowance Recorded
31-Dec-13		$	3,000		$	-3,000	$	-
31-Dec-12		$	30,135		$	-18,000	$	12,135
The following table describes our average recorded net investment in the impaired debt related investments and the related interest income recorded (amounts in thousands):
For the Year Ended December 31,		Average Recorded Investment			Interest Income Recognized
2013		$	6,067		$	51
2012			12,930			433
2011			25,314			3,060

Debt_Obligations

Debt Obligations	12 Months Ended
	Dec. 31, 2013
Debt Obligations [Abstract]	'
Debt Obligations	'
	5. DEBT OBLIGATIONS
	The following table describes our borrowings as of December 31, 2013 and 2012 (dollar amounts in thousands):
		Weighted Average Stated Interest Rate as of December 31,				Outstanding Balance as of December 31, (1)							Gross Investment Amount Securing Borrowings as of December 31, (2)
		2013		2012		2013			2012			2013			2012
	Fixed-rate mortgages (3)	5.80%		5.80%		$	969,622		$	1,160,042		$	1,898,946		$	2,061,757
	Floating-rate mortgages (4)	3.90%		3.50%			8,580			23,701			15,571			42,609
	Total mortgage notes	5.80%		5.70%			978,202			1,183,743			1,914,517			2,104,366
	Repurchase facilities (5)	2.80%		3.00%			45,270			135,709			65,726			198,389
	Total other secured borrowings	2.80%		3.00%			45,270			135,709			65,726			198,389
	Total secured borrowings	5.60%		5.40%			1,023,472			1,319,452			1,980,243			2,302,755
	Line of credit	1.90%		2.20%			30,000			30,000			N/A			N/A
	Term loan (6)	2.20%		2.20%			270,000			270,000			N/A			N/A
	Total unsecured borrowings	2.20%		2.20%			300,000			300,000			N/A			N/A
	Total borrowings	4.90%		4.80%		$	1,323,472		$	1,619,452		$	1,980,243		$	2,302,755
	(1)Amounts presented are net of (i) fair value adjustment to mortgages carried at fair value of $0 and $55.0 million as of December 31, 2013 and 2012, respectively, (ii) unamortized premiums (discounts) to the face value of our outstanding fixed-rate mortgages of $2.7 million and ($2.7) million as of December 31, 2013 and 2012, respectively, and (iii) GAAP principal amortization related to troubled debt restructurings of $1.5 million and $718,000 as of December 31, 2013 and 2012, respectively.
	(2)“Gross Investment Amount” as used here and throughout this document represents the allocated gross basis of real property and debt related investments, after certain adjustments. Gross Investment Amount for real property (i) includes the effect of intangible lease liabilities, (ii) excludes accumulated depreciation and amortization, and (iii) includes the impact of impairments. Amounts reported for debt related investments represent our net accounting basis of the debt investments, which includes (i) unpaid principal balances, (ii) unamortized discounts, premiums, and deferred charges, and (iii) allowances for loan loss.
	(3)Fixed-rate mortgages presented include outstanding balances included within liabilities related to assets held for sale as of December 31, 2013 of approximately $80.4 million at a weighted average interest rate of 6.1% secured by gross investments of approximately $170.3 million.
	(4)As of December 31, 2013, our floating-rate mortgage note was subject to an interest rate spread of 3.75% over one-month LIBOR. As of December 31, 2012, our floating-rate mortgage notes were subject to interest rates at spreads ranging from 2.9% to 3.75% over one-month LIBOR.
	(5)As of December 31, 2013, borrowings under our repurchase facility were subject to interest at a floating rate of 2.25% over one-month LIBOR. However, we had effectively fixed the interest rate of the borrowings using an interest rate swap, resulting in a fixed interest rate of 2.84% for the term of the borrowings (provided that our borrowing balance does not exceed our derivative instrument notional during that term). As of December 31, 2012, borrowings under our repurchase facilities were subject to interest at floating rates at spreads ranging from 2.25% to 3% over one-month LIBOR. As of December 31, 2012, we had effectively fixed the interest rate of approximately $79.1 million of the total of $135.7 million in borrowings using interest rate swaps at 3.14%, resulting in a weighted average interest rate on the total repurchase facility of 3.04%.
	(6)As of December 31, 2013, borrowings under our term loan were subject to interest at a floating rate of 1.70% over one-month LIBOR. However, we had effectively fixed the interest rate for $200.0 million of the total of $270.0 million in borrowings using interest rate swaps at 2.34%, resulting in a weighted average interest rate on the total term loan of 2.21%. As of December 31, 2012, borrowings of $270.0 million under our term loan were subject to interest at a floating rate of 1.95% over one-month LIBOR, resulting in a weighted average interest rate on the total term loan of 2.16%.
	As of December 31, 2013, 12 mortgage notes were interest-only and 20 mortgage notes were fully amortizing with outstanding principal balances of approximately $341.4 million and $635.6 million, respectively. None of our mortgage notes are recourse to us.
	As of December 31, 2013, we had outstanding borrowings of $270.0 million and $30.0 million, respectively, under our term loan and revolving credit facility components of our senior unsecured term loan and revolving line of credit (collectively, the “Facility”). As of December 31, 2013, the unused portion of the revolving credit facility component of the Facility was approximately $320.0 million, of which approximately $86.1 million was available. As of December 31, 2012, we had outstanding borrowings of $270.0 million and $30.0 million under the term loan and revolving credit facility components of the Facility, respectively, and $150.0 million was available for us to borrow under the revolving credit facility component of the Facility.
	Borrowing Activity
	Assumption of Mortgage Note
	In connection with our acquisition of 655 Montgomery discussed in Note 3, we assumed a mortgage note secured by 655 Montgomery with an unpaid principal balance of approximately $57.9 million at acquisition. The mortgage note is amortizing and bears interest at a fixed rate of 6.01%. The mortgage note matures in June 2016 and does not include any extension options.
	Repayments of Mortgage Notes and Other Secured Borrowings
	During the year ended December 31, 2013, we repaid one mortgage note borrowing of approximately $14.5 million before its scheduled maturity. The note was secured by an office property in the Dallas, TX market. The note was originally scheduled to mature during 2013. We recognized a loss on financing commitments and early repayment of debt of approximately $233,000 relating to this repayment. Additionally, during the year ended December 31, 2013, we repaid one of our repurchase facilities in full at initial maturity and repaid a portion of our other repurchase facility before contractual maturity. Related to these repayments, we recognized a loss on financing commitments and early repayment of debt of approximately $479,000 during the year ended December 31, 2013.
	As discussed in Note 3, during the year ended December 31, 2013, Comerica Bank Tower was sold by the Receiver pursuant to a court order to a purchaser unrelated to us. Comerica Bank Tower was subject to a mortgage note with an outstanding principal balance as of the date of the disposition of $177.3 million. We had carried the loan at fair value, which was $123.0 million as of December 31, 2012.
	Additionally, as discussed in Note 3, during the year ended December 31, 2013, we sold 12 properties, eight of which were subject to mortgage notes at disposition. In total, the buyers of these eight properties assumed mortgage note balances of approximately $117.6 million from us.
	Subsequent to December 31, 2013, as discussed in Note 3, we sold a portfolio of 12 properties, 11 of which were subject to mortgage notes at disposition. In total, the buyer of this portfolio assumed mortgage note balances of approximately $80.4 million. Related to this disposition, we recognized a loss on financing commitments and early repayment of debt during the year ended December 31, 2013, of approximately $1.8 million upon the discontinuation of hedge accounting and the reclassification of accumulated other comprehensive loss on cash flow hedges relating to these mortgages.
	Debt Maturities
	The following table reflects our contractual debt maturities as of December 31, 2013, specifically our obligations under secured borrowings and unsecured borrowings (dollar amounts in thousands):
			As of December 31, 2013
			Mortgage Notes and Other Secured Borrowings					Unsecured Borrowings					Total
	Year Ending December 31,		Number of Borrowings Maturing		Outstanding Balance (1)(2)(3)			Number of Borrowings Maturing		Outstanding Balance (4)			Outstanding Balance (5)(6)
	2014		4		$	145,190		0		$	-		$	145,190
	2015		5			127,206		0			-			127,206
	2016		13			347,496		1			30,000			377,496
	2017		7			223,371		0			-			223,371
	2018		0			4,999		1			270,000			274,999
	2019		0			5,292		0			-			5,292
	2020		1			157,944		0			-			157,944
	2021		0			1,707		0			-			1,707
	2022		1			1,663		0			-			1,663
	2023		0			978		0			-			978
	Thereafter		2			6,431		0			-			6,431
	Total		33		$	1,022,277		2		$	300,000		$	1,322,277
	(1)Three of our mortgage notes and one of our repurchase facilities with an aggregate outstanding principal balance as of December 31, 2013 of approximately $132.5 million have initial maturities before December 31, 2014.  One of these mortgage notes with an outstanding balance of $38.9 million, and the repurchase facility with an outstanding balance of $45.3 million have extension options beyond December 31, 2014. Borrowings that are subject to extension options are also subject to certain lender covenants and restrictions that we must meet to extend the initial maturity date. We currently believe that we will qualify for these extension options. However, we cannot guarantee that we will meet the requirements to extend the notes upon initial maturity. In the event that we do not qualify to extend the notes, we expect to repay them with proceeds from new borrowings or available proceeds from our revolving credit facility.
	(2)Three of our mortgage notes with outstanding balances of $39.7 million, $30.9 million, and $9.8 million, maturing in 2014, 2015, and 2016, respectively, were classified within liabilities associated with assets held for sale in the accompanying balance sheet as of December 31, 2013. These mortgages were assumed by the purchaser of the related portfolio of real properties subsequent to December 31, 2013.
	(3)Secured borrowings presented include (i) mortgage note borrowings of approximately $977.0 million with maturities ranging from 2014 to 2029, and (ii) borrowings under our repurchase facility of approximately $45.3 million, which matures in 2014 and is subject to three one-year extension options.
	(4)Unsecured borrowings presented include (i) borrowings under our revolving credit facility of $30.0 million, which matures in 2016, subject to two one-year extension options, and (ii) term loan borrowings of $270.0 million which mature in 2018.
	(5)Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not include the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.
	(6)As of December 31, 2013, our mortgage notes and secured borrowings are secured by interests in real properties and debt investments totaling approximately $2.0 billion.

Hedging_Activities

Hedging Activities	12 Months Ended
	Dec. 31, 2013
Hedging Activities [Abstract]	'
Hedging Activities	'
	6. HEDGING ACTIVITIES
	Risk Management Objective of Using Derivatives
	We maintain risk management control systems to monitor interest rate risk attributable to both our outstanding and forecasted debt obligations. We generally seek to limit the impact of interest rate changes on earnings and cash flows by selectively utilizing derivative instruments to hedge exposures to changes in interest rates on loans secured by our assets. While this hedging strategy is designed to minimize the impact on our net income (loss) and cash provided by operating activities from changes in interest rates, the overall returns on our investments may be reduced. Our board of directors has established policies and procedures regarding our use of derivative instruments for hedging or other purposes to achieve these risk management objectives.
	Cash Flow Hedges of Interest Rate Risk
	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 primarily use interest rate swaps and caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium payment. Additionally, we have entered into and plan to enter into certain interest rate derivatives with the goal of mitigating our exposure to adverse fluctuations in the interest payments on our one-month LIBOR-indexed debt. Certain of our floating rate borrowings are not hedged and therefore, to an extent, we have ongoing exposure to interest rate movements.
	The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges under ASC Topic 815, Derivatives and Hedging (“ASC Topic 815”) is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the next 12 months, we estimate that approximately $1.8 million will be reclassified as an increase to interest expense related to effective forward started interest rate swaps where the hedging instrument has been terminated, and we estimate that approximately $1.0 million will be reclassified as an increase to interest expense related to active effective hedges of floating-rate debt issuances. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. The table below presents a reconciliation of the beginning and ending balances, between December 31, 2012 and December 31, 2013, of our accumulated other comprehensive loss (“OCI”), net of amounts attributable to noncontrolling interests related to the effective portion of our cash flow hedges as presented on our financial statements, as well as amounts related to our available-for-sale securities (amounts in thousands):
				Gains and Losses on Cash Flow Hedges			Unrealized Gains and Losses on Available-For-Sale Securities			Accumulated Other Comprehensive Income
	Beginning balance as of December 31, 2012:			$	-14,710		$	-1,486		$	-16,196
		Other comprehensive income:
		Amortization of OCI into interest expense (net of tax benefit of $0)			2,726			-			2,726
		Change in fair value recognized in OCI (net of tax benefit of $0)			352			-			352
		Amounts reclassified from accumulated other comprehensive income:
		Losses reclassified into loss on extinguishment of debt and financing commitments upon discontinuance of cash flow hedges (net of tax benefit of $0)			1,897			-			1,897
		Net current-period other comprehensive income			4,975			-			4,975
		Attribution of and other adjustments to OCI attributable to noncontrolling interests			-141			568			427
	Ending balance as of December 31, 2013			$	-9,876		$	-918		$	-10,794
	Fair Values of Derivative Instruments
	The table below presents the gross fair value of our derivative financial instruments as well as their classification on our accompanying balance sheet as of December 31, 2013 and  2012 (amounts in thousands):
			Asset Derivatives								Liability Derivatives
			Balance Sheet		As of December 31, 2013			As of December 31, 2012			Balance Sheet	As of December 31, 2013		As of December 31, 2012
			Location		Fair Value			Fair Value			Location	Fair Value		Fair Value
	Derivatives designated as hedging instruments under ASC Topic 815
	Interest rate contracts		Other assets, net (1)		$	748		$	-		Other liabilities (1)	$	-43	$	-403
	Total derivatives designated as hedging instruments under ASC Topic 815					748			-				-43		-403
	Derivatives not designated as hedging instruments under ASC Topic 815
	Interest rate contracts		Other assets, net (1)			-			-		Other liabilities (1)		-		-13
	Total derivatives not designated as hedging instruments under ASC Topic 815					-			-				-		-13
	Total derivatives				$	748		$	-			$	-43	$	-416
	(1)Although our derivative contracts are subject to master netting arrangements which serve as credit mitigants to both us and our counterparties under certain situations, we do not net our derivative fair values or any existing rights or obligations to cash collateral on the consolidated balance sheet.
	The majority of the inputs used to value our derivative instruments fall within Level 2 of the fair value hierarchy. However, the credit valuation adjustments associated with our derivative instruments utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of potential default by us and our counterparties. As of December 31, 2013, we had assessed the significance of the impact of the credit valuation adjustments and had determined that it was not significant to the overall valuation of our derivative instruments. As a result, we have determined that the significant inputs for all of our derivative valuations are classified in Level 2 of the fair value hierarchy.
	Designated Hedges
	As of December 31, 2013, we had seven outstanding interest rate swaps that were designated as cash flow hedges of interest rate risk, with a total notional amount of $255.4 million. As of December 31, 2012, we had two outstanding interest rate caps and two outstanding interest rate swaps that were designated as cash flow hedges of interest rate risk, with a total notional amount of $90.0 million.
	Undesignated Hedges
	Derivatives not designated as hedges are not speculative and are used to hedge our exposure to interest rate movements and other identified risks but do not meet hedge accounting requirements. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings and resulted in a loss of approximately $0,  $19,000, and $85,000 for the years ended December 31, 2013, 2012, and 2011, respectively. As of December 31, 2013 we did not have any outstanding derivatives that were not designated as hedges. As of December 31, 2012, we had two outstanding interest rate caps and one interest rate swap that were not designated as hedges with a total notional amount of approximately $230.4 million.
	Effect of Derivative Instruments on the Statements of Comprehensive Income (Loss)
	The table below presents the effect of our derivative financial instruments on our accompanying financial statements for the years ended December 31, 2013, 2012, and 2011 (amounts in thousands):
			For the Year Ended December 31,
			2013			2012			2011
	Derivatives Designated as Hedging Instruments
	Derivative type			Interest rate contracts			Interest rate contracts			Interest rate contracts
	Amount of gain (loss) recognized in OCI (effective portion)		$	352		$	-436		$	-625
	Location of gain or (loss) reclassified from accumulated OCI into income (effective portion)			Interest expense			Interest expense			Interest expense
	Amount of loss reclassified from accumulated OCI		$	-2,726		$	-2,648		$	-2,862
	into income (effective portion)
	Location of gain or (loss) recognized in income (ineffective portion and amount excluded from effectiveness testing)			Loss on financing commitments			Loss on financing commitments, Discontinued operations, net of taxes			Discontinued operations, net of taxes
	Amount of loss recognized in income due to		$	-1,897		$	-1,751		$	-600
	missed forecast (ineffective portion and amount excluded from effectiveness testing)
	Derivatives Not Designated as Hedging Instruments
	Derivative type			Interest rate contracts			Interest rate contracts			Interest rate contracts
	Location of gain or (loss) recognized in income			Interest and other income			Interest and other income			Interest and other income
	Amount of loss recognized in income		$	-		$	-19		$	-85

Fair_Value_Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	7.FAIR VALUE DISCLOSURES
	ASC Topic 820, Fair Value Measurement and Disclosures (“ASC Topic 820”), defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC Topic 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.
	ASC Topic 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC Topic 820 establishes 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).
	Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liabilities, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	The table below presents certain of our assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 and 2012, aggregated by the level in the fair value hierarchy within which those measurements fall as defined above (amounts in thousands). There were no changes between fair value hierarchy levels during the years ended December 31, 2013 and 2012.
		Level 1		Level 2		Level 3		Total
	As of December 31, 2013:
	Assets
	Real estate securities	$	-	$	-	$	461	$	461
	Derivative instruments		-		748		-		748
	Total assets	$	-	$	748	$	461	$	1,209
	Liabilities
	Derivative instruments	$	-	$	-43	$	-	$	-43
	Total liabilities	$	-	$	-43	$	-	$	-43
	As of December 31, 2012:
	Assets
	Real estate securities	$	-	$	-	$	461	$	461
	Total assets	$	-	$	-	$	461	$	461
	Liabilities
	Mortgage notes carried at fair value	$	-	$	-	$	-122,995	$	-122,995
	Derivative instruments	$	-	$	-416	$	-	$	-416
	Total liabilities	$	-	$	-416	$	-122,995	$	-123,411
	We review our fair value hierarchy classifications on a quarterly basis. Transfers into or out of Level 3 are made if the significant inputs used in measuring the fair values of the assets and liabilities became unobservable or observable, respectively, in the current market environment. When assets and liabilities are transferred between levels, we recognize the transfer at the beginning of the period. The table below presents a reconciliation of the beginning and ending balances of certain of our assets and liabilities having fair value measurements based on significant unobservable inputs (Level 3), and our derivative instruments, between December 31, 2012 and December 31, 2013 (amounts in thousands).
		Mortgage Notes Carried at Fair Value		Real Estate Securities		Derivative Instruments
	Beginning balance as of December 31, 2012	$	-122,995	$	461	$	-416
	Total net gains (losses) included in:
	Net income (other income and expense)		-		-		-8
	Other comprehensive income (Unrealized change from cash flow hedging derivatives)		-		-		352
	Total change in fair value		-		-		344
	Settlements		122,995		-		777
	Transfers in and/or out of Level 3		-		-		-
	Ending balance as of  December 31, 2013	$	-	$	461	$	705
	Fair Value Estimates of Investments in Real Estate Securities
	We estimate the fair value of our CMBS and CRE-CDO securities using a combination of observable market information and unobservable market assumptions. Observable market information considered in these fair market valuations include benchmark interest rates, interest rate curves, credit market indexes and swap curves. Unobservable market assumptions considered in the determination of the fair market valuations of our CMBS and CRE-CDO investments include market assumptions related to discount rates, default rates, prepayment rates, reviews of trustee or investor reports and non-binding broker quotes and pricing services in what is currently an inactive market. Additionally, we consider security-specific characteristics in determining the fair values of our CMBS and CRE-CDO investments, which include consideration of credit enhancements, the underlying collateral’s average default rates, the average delinquency rate and loan-to-value and several other characteristics. Management periodically reviews the fair value of our CMBS and CRE-CDO securities. As a result, both Level 2 and Level 3 inputs are used in arriving at the valuation of our investments in CMBS and CRE-CDOs. We consider the Level 3 inputs used in determining the fair value of its investments in CMBS and CRE-CDO securities to be significant. As such, all investments in CMBS and CRE-CDO securities fall under the Level 3 category of the fair value hierarchy. Using the above assumptions, expectations of future cash flows primarily drive our fair value estimate of our CMBS and CRE-CDO securities. Deterioration in possible cash flows from our CMBS and CRE-CDO securities will likely reduce the fair value of these securities to zero within the next 12 to 24 months.
	Fair Value Estimates of Derivative Instruments
	We have used interest rate swaps, zero cost collars and purchased interest rate caps to manage interest rate risk. The values of these instruments are determined by a third party valuation specialist based on assumptions provided be us using widely accepted valuation techniques, including discounted cash flow analysis of the expected cash flows of each derivative. Management reviews the fair value analyses prepared by the third party valuation specialist which reflect the contractual terms of the derivatives, including the period to maturity, and use observable market-based inputs, including interest rate curves and implied volatilities. The valuation methodologies are segregated into two categories of derivatives: (i) interest rate swaps and (ii) zero cost collars/ purchased interest rate caps.
	Interest Rate Swaps — Both spot starting and forward starting swaps are considered and measured at fair value similarly. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of future interest rates (i.e. forward curves) derived from observable market interest rate curves.
	Zero Cost Collars/Interest Rate Caps (Interest Rate Options) — Zero cost collars and interest rate caps are considered and measured at fair value as interest rate options. The fair values of interest rate options are determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fell below or rose above the strike rate of the caps or outside of the applicable collar rates. The variable interest rates used in the calculation of projected receipts on the cap or collar rates are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities.
	We incorporate credit valuation adjustments 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.
	The majority of the inputs used to value our derivative instruments fall within Level 2 of the fair value hierarchy. However, the credit valuation adjustments associated with our derivative instruments utilize Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of potential default by us and our counterparties. As of December 31, 2013, we had assessed the significance of the impact of the credit valuation adjustments and had determined that it was not significant to the overall valuation of our derivative instruments. As a result, we have determined that all of our derivative valuations are appropriately classified in Level 2 of the fair value hierarchy.
	Nonrecurring Fair Value Measurements
	During the year ended December 31, 2013, we recognized an impairment loss related to a wholly-owned industrial property in the accompanying statements of operations. The impairment was based on a reduction of our estimated holding period for this property, triggering impairment recognition with the related fair value measurement based on our estimate of future cash flows from the operation and disposition of this property. We consider the Level 3 inputs used in determining the fair value of this real property investment to be significant. As such, this investment falls under the Level 3 category of the fair value hierarchy. The fair value used in determining impairment for this property was $14.5 million as of December 31, 2013. The key assumption used in determining the fair value of this property is the discount rate of 8.5%, which was applied to the future cash flows we expect to receive from operating and disposing of the property. Our expectations of the future cash flows are derived from assumptions about market rents, operating expenses, and the terminal value of the property, some of which are developed by a third-party appraisal firm that we engage.
	During the year ended December 31, 2012, we recognized an impairment loss related to an industrial property in the accompanying statements of operations. The impairment was based on a reduction of our estimated holding period for this property, triggering impairment recognition based on our estimate of future cash flows from the operation and disposition of this property. We consider the Level 3 inputs used in determining the fair value of this real property investment to be significant. As such, this investment falls under the Level 3 category of the fair value hierarchy.
	During the year ended December 31, 2011, we recognized an impairment loss related to an office property in the accompanying statements of income (loss). The impairment was based on our determination that future cash flows from the property were highly uncertain and insufficient to cover the carrying amount of the property as of December 31, 2011. We consider the Level 3 inputs used in determining the fair value of this real property investment to be significant. As such, this investment falls under the Level 3 category of the fair value hierarchy.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2013
Fair Value of Financial Instruments [Abstract]	'
Fair Value of Financial Instruments	'
	8. FAIR VALUE OF FINANCIAL INSTRUMENTS
	We are required to disclose the fair value of our financial instruments for which it is practicable to estimate the value. The fair value of a financial instrument is the amount at which such financial instrument could be exchanged in a current transaction between willing parties, other than in a forced sale or liquidation. For certain of our financial instruments, fair values are not readily available since there are no active trading markets as characterized by current exchanges between willing parties. Accordingly, we derive our estimated fair value using various valuation techniques, such as computing the present value of estimated future cash flows using discount rates commensurate with the risks involved. However, the determination of estimated cash flows may be subjective and imprecise and changes in assumptions or estimation methodologies can have a material effect on these estimated fair values. In that regard, the fair value estimates may not be substantiated by comparison to independent markets, and in many cases, may not be realized in immediate settlement of the instrument.
	ASC Topic 820 defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC Topic 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.
	ASC Topic 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC Topic 820 establishes 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).
	Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that
	are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liabilities, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	The fair values estimated below are indicative of certain interest rate and other assumptions as of December 31, 2013 and 2012, and may not take into consideration the effects of subsequent interest rate or other assumption fluctuations, or changes in the values of underlying collateral. The fair values of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses approximate their carrying values because of the short-term nature of these instruments.
	The carrying amounts and estimated fair values of our other financial instruments, including instruments classified as held for sale, as of December 31, 2013 and 2012 were as follows (amounts in thousands):
		As of December 31, 2013				As of December 31, 2012
			Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	Assets:
	Investments in real estate securities	$	461	$	461	$	461	$	461
	Fixed-rate debt related investments, net		98,724		101,012		108,482		110,796
	Floating-rate debt related investments, net		25,211		24,504		78,839		79,803
	Derivative instruments		748		748		-		-
	Liabilities:
	Fixed-rate mortgage notes carried at amortized cost	$	969,622	$	1,010,085	$	1,037,047	$	1,091,425
	Fixed-rate mortgage notes carried at fair value		-		-		122,995		122,995
	Floating-rate mortgage notes		8,580		8,582		23,701		23,738
	Floating-rate other secured borrowings		45,270		45,270		135,709		135,931
	Floating-rate unsecured borrowings		300,000		301,690		300,000		300,000
	Derivative liabilities		43		43		416		416
	The methodologies used and key assumptions made to estimate fair values of the other financial instruments described in the above table are as follows:
	Debt Related Investments—The fair value of our performing debt investments are estimated using a discounted cash flow methodology. This method discounts estimated future cash flows using rates management determines best reflect current market interest rates that would be offered for loans with similar characteristics and credit quality. Credit spreads and market interest rates used to determine the fair value of these instruments are based on unobservable Level 3 inputs which management has determined to be its best estimate of current market values.
	Mortgage Notes, Other Secured Borrowings, and Unsecured Borrowings Carried at Amortized Cost—The fair value of our mortgage notes, other secured borrowings, and unsecured borrowings are estimated using a discounted cash flow analysis, based on our estimate of market interest rates. Credit spreads relating to the underlying instruments are based on unobservable Level 3 inputs, which we have determined to be our best estimate of current market spreads of similar instruments.

Noncontrolling_Interests

Noncontrolling Interests	12 Months Ended
	Dec. 31, 2013
Noncontrolling Interests [Abstract]	'
Noncontrolling Interests	'
	9.NONCONTROLLING INTERESTS
	Our noncontrolling interests consist of two components: (i) OP Units held by third parties and (ii) joint venture partnership interests held by our partners. The following table summarizes changes to noncontrolling interest balances between December 31, 2012 and December 31, 2013 in terms of cumulative contributions, distributions and cumulative allocations of net income (loss) and redemptions and buyouts of the interests (amounts in thousands).
			OP Units:		Joint Venture Partner Interests:		Noncontrolling Interests
	Beginning balance as of December 31, 2012:		$	88,259	$	7,572	$	95,831
		Comprehensive Income and Loss
		Net income		4,010		-8		4,002
		Unrealized change from cash flow hedging derivatives		354		-		354
		Contributions, Distributions and Redemptions
		Contributions from noncontrolling interest holders		-		212		212
		Distributions to noncontrolling interest holders		-4,807		-639		-5,446
		Redemption and buyout of noncontrolling interests, net		-1,408		-1,639		-3,047
	Ending balance as of  December 31, 2013		$	86,408	$	5,498	$	91,906
	OP Units
	Securities that are redeemable for cash or other assets at the option of the holder, not solely within the control of the issuer, are classified as redeemable noncontrolling interests outside of permanent equity in our accompanying balance sheets. We have evaluated our ability to deliver shares of common stock to satisfy redemption requests from holders of our OP Units and we have concluded that we have the right to satisfy the redemption requirements of holders of our OP Units by delivering unregistered shares of our common stock. Each outstanding OP Unit is exchangeable for one share of our common stock, and the OP Unit holder cannot require redemption in cash or other assets. As a result, we classify our OP Units held by third parties as noncontrolling interests.
	We are the sole general partner of our Operating Partnership and currently own, in our capacity as the general partner, 200 OP Units for which we contributed $2,000. Subsequent to that initial investment, we have contributed 100% of the proceeds received from our offerings of common stock to our Operating Partnership in exchange for OP Units representing our interest as a limited partner of the Operating Partnership. As of December 31, 2013 and 2012, we owned approximately 93.0% and 92.6% of the outstanding limited partnership interests in our Operating Partnership, respectively, and the remaining limited partnership interests in our Operating Partnership were owned by third-party investors.
	Our Operating Partnership has classes of OP Units that correspond to our four classes of common stock: Class E OP Units, Class A OP Units, Class W OP Units and Class I OP Units. After a period of one year from the date of issuance, holders of Class E OP Units (other than us) may request the Operating Partnership to redeem their Class E OP Units. We have the option of redeeming the Class E OP Units with cash for an amount based on our NAV per share as of the effective date of the redemption, shares of our common stock on a one-for-one basis, or with a combination of cash and Class E shares of common stock. During the years ended December 31, 2013 and 2012, we issued approximately 0 and 269,000 Class E shares of our common stock in redemption of approximately 0 and 273,000 Class E OP Units, respectively, in accordance with this option. During the years ended December 31, 2013 and 2012, we redeemed approximately 904,000 and 1.7 million Class E OP Units for approximately $6.2 million and $12.8 million in cash, respectively.
	As of December 31, 2013 and 2012, our Operating Partnership had issued and outstanding approximately 13.3 million and 14.2 million Class E OP Units, respectively, to third-party investors in connection with its private placement offerings. Such units had a maximum approximate redemption value of $92.0 million and $95.0 million, as of December 31, 2013 and December 31, 2012, respectively, based on our December 31, 2013 and December 31, 2012 NAV per share, respectively.
	Joint Venture Partner Interests
	Certain of our joint ventures are consolidated by us in the accompanying financial statements. Our joint venture partners’ interests in our consolidated partnerships are not redeemable. As a result, we classify our joint venture partners’ interests as noncontrolling interests. During the year ended December 31, 2013, we purchased one of our joint venture partners’ interest in two office properties and and two industrial properties for approximately $4.4 million, which resulted in a net decrease in noncontrolling interest of $1.6 million. During the year ended December 31, 2012, we purchased one of our joint venture partners’ interest in an office property for approximately $3.0 million, which resulted in a net decrease in noncontrolling interest of $1.6 million.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity [Abstract]	'
Stockholders' Equity	'
	10.STOCKHOLDERS’ EQUITY
	Common Stock
	On May 27, 2005, we filed a Registration Statement on Form S-11 with the Commission in connection with an initial public offering of our Class E shares of common stock, which was declared effective on January 27, 2006. On June 11, 2007, we filed a Registration Statement on Form S-11 with the Commission in connection with a follow-on public offering of our Class E common stock, which was declared effective on January 22, 2008. As of the close of business on September 30, 2009, we terminated the primary portion of our public offerings of Class E shares of our common stock and ceased accepting new subscriptions to purchase shares of our common stock. On October 23, 2009, we filed a Registration Statement for the sale of up to $237,500,000 in Class E shares of our common stock pursuant to our distribution reinvestment plan. This distribution reinvestment plan offering is ongoing.
	On July 12, 2012, the Commission declared effective our Registration Statement on Form S-11 which applies to the offer and sale of shares of Class A, Class W, and Class I common stock to the public through a primary offering and a restated distribution reinvestment plan with NAV-based pricing. The following table describes the changes in each class of common shares during each of the years ended December 31, 2013, 2012, and 2011 (shares and dollar amounts in thousands).
		Class E Common Stock					Class A Common Stock					Class W Common Stock					Class I Common Stock				Total Proceeds
		Shares		Amount (1)			Shares		Amount (1)			Shares		Amount (1)			Shares		Amount (1)		Shares	Amount (1)
	Balances, December 31, 2010	182,717		$	1,806,652		-		$	-		-		$	-		-		$	-	182,717	$	1,806,652
	Common stock:
	Issuance of common stock and OP Units:
	Distribution Reinvestment Plan	5,274			43,540		-			-		-			-		-			-	5,274		43,540
	Conversion of OP Units to common stock	118			978		-			-		-			-		-			-	118		978
	Redemptions of common stock	-5,778			-48,205		-			-		-			-		-			-	-5,778		-48,205
	Balances, December 31, 2011	182,331		$	1,802,965		-		$	-		-		$	-		-		$	-	182,331	$	1,802,965
	Issuance of common stock:
	Shares Sold	65			317		12			83		12			83		12			83	101		566
	Distribution Reinvestment Plan	4,610			34,449		-			-		-			-		-			-	4,610		34,449
	Conversion of OP Units to common stock	269			2,273		-			-		-			-		-			-	269		2,273
	Redemptions of common stock	-9,183			-64,808		-			-		-			-		-			-	-9,183		-64,808
	Balances, December 31, 2012	178,092		$	1,775,196		12		$	83		12		$	83		12		$	83	178,128	$	1,775,445
	Issuance of common stock:
	Shares Sold	-			-		205			1,451		197			1,354		4,301			29,333	4,703		32,138
	Distribution Reinvestment Plan	3,143			21,352		-			-		-			-		18			121	3,161		21,473
	Redemptions of common stock	-9,981			-68,402		-			-		-			-		-4			-30	-9,985		-68,432
	Balances, December 31, 2013	171,254		$	1,728,146		217		$	1,534		209		$	1,437		4,327		$	29,507	176,007	$	1,760,624
	(1)Dollar amounts presented in this table represent the gross amount of proceeds from the sale of common shares, or the amount paid to stockholders to redeem common shares, and do not include other costs and expenses accounted for within additional paid-in capital, such as selling commissions, dealer manager and distribution fees, offering and organizational costs, and other costs associated with our distribution reinvestment plans and share redemption programs.
	Redemptions
	We have adopted a Class E Share Redemption Program (the “Class E SRP”), whereby Class E stockholders may request that we redeem all or any portion of their Class E shares subject to certain conditions and limitations. We also have a separate Class A, W and I Share Redemption Program (“Class AWI SRP”) for holders of our Class A, Class W or Class I shares. Our board of directors may modify, suspend or terminate our share redemption programs if it deems such action to be in the best interest of our stockholders. Our board of directors may from time to time, but is not obligated to, authorize funds for redemptions of Class E shares in greater or lower amounts.
	During the years ended December 31, 2013 and 2012, we redeemed approximately 10.0 million and 9.2 million Class E shares, respectively, pursuant to our Class E SRP for approximately $68.4 million and $64.8 million, respectively. During the years ended December 31, 2013 and 2012, our board of directors authorized an additional $32.8 million and $25.0 million, respectively, in addition to the amounts calculated in accordance with our Class E SRP, related to these redemptions.
	During the year ended December 31, 2013, we redeemed a negligible amount of Class I shares pursuant to our Class AWI SRP. We did not redeem any shares pursuant to our Class AWI SRP during the year ended December 31, 2012.
	Distributions
	We accrue distributions on a daily basis and pay distributions on a quarterly basis. Historically, each quarter, our board of directors has authorized the following quarter’s daily distribution accrual. We calculate individual payments of distributions to each stockholder or OP Unit holder based upon daily record dates during each quarter, so that investors are eligible to earn distributions immediately upon purchasing shares of our common stock or upon purchasing OP Units. The following table describes our total distributions declared on our common stock for the year ended December 31, 2013, 2012 and 2011, and the portion of each distribution that was paid in cash and reinvested in shares (dollar amounts in thousands).
			For the Year Ended December 31,
	Distributions:		2013			% of Total Distributions		2012			% of Total Distributions		2011			% of Total Distributions
	Paid in cash		$	41,123		66.0%		$	53,311		63.3%		$	62,575		59.2%
	Reinvested in shares			21,207		34.0%			30,948		36.7%			43,129		40.8%
	Total distributions		$	62,330		100.0%		$	84,259		100.0%		$	105,704		100.0%
	The following table sets forth the distributions that have been paid and/or authorized as of December 31, 2013, subject to class-specific adjustments.
			Amount Declared per Share (1)
	Quarter		Class E Shares			Class A Shares			Class W Shares			Class I Shares			Weighted Average			Payment Date
	2012
	1st Quarter 2012		$	0.1250			N/A			N/A			N/A		$	0.1250		16-Apr-12
	2nd Quarter 2012		$	0.1250			N/A			N/A			N/A		$	0.1250		24-Jul-12
	3rd Quarter 2012		$	0.1250		$	0.0938		$	0.1012		$	0.1086		$	0.1250		16-Oct-12
	4th Quarter 2012		$	0.0875		$	0.0691		$	0.0775		$	0.0858		$	0.0875		16-Jan-13
	2013
	1st Quarter 2013		$	0.0875		$	0.0692		$	0.0775		$	0.0858		$	0.0875		16-Apr-13
	2nd Quarter 2013		$	0.0875		$	0.0689		$	0.0774		$	0.0858		$	0.0875		16-Jul-13
	3rd Quarter 2013		$	0.0875		$	0.0685		$	0.0771		$	0.0858		$	0.0875		16-Oct-13
	4th Quarter 2013		$	0.0875		$	0.0684		$	0.0771		$	0.0858		$	0.0874		16-Jan-14
	2014
	1st Quarter 2014 (2)		$	0.0875		$	0.0875		$	0.0875		$	0.0875		$	0.0875		April 16, 2014 (3)
	(1)Assumes ownership of share or unit for the entire quarter.
	(2)The distribution amount herein for the first quarter of 2014 does not reflect class-specific adjustments made to our Class A, Class W, and Class I shares, which have not yet been determined.
	(3)Expected payment date.
	Distribution Tax Characterization
	Our distributions to stockholders are characterized for federal income tax purposes as (i) ordinary income, (ii) non-taxable return of capital, or (iii) long-term capital gain. Distributions that exceed our current and accumulated tax earnings and profits constitute a return of capital for tax purposes and reduce the stockholders’ basis in the common shares. To the extent that distributions exceed both current and accumulated earnings and profits and the stockholders’ basis in the common shares, they will generally be treated as a gain or loss upon the sale or exchange of our stockholders’ common shares. We elected to classify our fourth quarter 2013 distribution as a 2014 distribution as part of our overall tax and REIT compliance strategy, resulting in a lower amount of reported distributions than were declared for the period.  This election increased the percentage of total distributions that are taxable, however, it did not increase the actual dollar amount that is taxed. We notify stockholders of the taxability of distributions paid during the preceding year on an annual basis. The following table summarizes the information reported to investors regarding the taxability of distributions on common shares for the years ended December 31, 2013, 2012 and 2011.
			For the Year Ended December 31,
				2013					2012					2011
	Per Common Share		Per Share Amount			Percentage		Per Share Amount			Percentage		Per Share Amount			Percentage
	Ordinary income		$	0.11		40.98%		$	0.01		1.49%		$	0.19		32.53%
	Non-taxable return of capital			0.15		59.02%			0.45		98.51%			0.39		67.47%
	Total		$	0.26		100.00%		$	0.46		100.00%		$	0.58		100.00%

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	11. RELATED PARTY TRANSACTIONS
	Our day-to-day activities are managed by our Advisor, a related party, under the terms and conditions of the Advisory Agreement. Our Advisor is considered to be a related party as certain indirect owners and employees of our Advisor serve as two of our directors and all of our executive officers. The responsibilities of our Advisor cover all facets of our business, and include the selection and underwriting of our real property and debt related investments, the negotiations for these investments, the asset management and financing of these investments and the oversight of real property dispositions.
	In connection with the Offering, we entered into an Eighth Amended and Restated Advisory Agreement (the “Advisory Agreement”) with our Advisor, effective July 12, 2012, which modified the fees and expense reimbursements payable to our Advisor. The Advisory Agreement may be renewed for an unlimited number of successive one-year terms.  The current term of the Advisory Agreement expires on June 30, 2014. Per the Advisory Agreement, in consideration for asset management services performed, we pay our Advisor an advisory fee comprised of two separate components: (1) a fixed amount equal to 1.15% annually of the “Aggregate Fund NAV” (defined as the aggregate NAV of our Class E shares, Class A shares, Class W shares and Class I shares, along with the Class E OP Units held by third parties) for each day, and (2) a performance component that is based on the annual non-compounded investment return provided to holders of “Fund Interests” (defined as our Class E shares, Class A shares, Class W shares, Class I shares, and Class E OP Units held by third parties) such that the Advisor will receive 25% of the overall return in excess of 6%; provided that in no event may the performance condition exceed 10% of the overall return for such year, and subject to certain other limitations. Additionally, the Advisor will provide us with a waiver of a portion of its fees generally equal to the amount of the performance component that would have been payable with respect to the Class E shares and the Class E OP Units held by third parties until the NAV of such shares or units exceeds $10.00 per share or unit, the benefit of which will be shared among all holders of Fund Interests. We will also pay our Advisor a development management fee equal to 4% of the cost to develop, construct, or improve real property assets. In addition, we will pay our Advisor a fee of 1% of the sales price of individual real property assets upon disposition of such assets. Further, for a substantial amount of services in connection with the sale of a property, as determined by a majority of our independent directors, we will pay our Advisor up to 50% of the reasonable, customary and competitive commission paid for the sale of a comparable real property, provided that such amount shall not exceed 1% of the contract price of the property sold and, when added to all other real estate commissions paid to unaffiliated parties in connection with the sale, may not exceed the lesser of a competitive real estate commission or 6% of the sales price of the property.
	In addition, pursuant to the Advisory Agreement, we will pay directly, or reimburse our Advisor and the Dealer Manager (defined below) if they pay on our behalf any organizational and offering expenses (other than selling commissions, the dealer manager fee, distribution fees and non-transaction based compensation allocated to sales-related activities of employees of the Dealer Manager in connection with the offering) relating to any public offerings as and when incurred. After the termination of the primary portion of the offering and again after termination of the distribution reinvestment plan portion of the offering, the Advisor has agreed to reimburse us to the extent that total cumulative organization and offering expenses (including selling commissions, the dealer manager fee and distribution fees) that we incur exceed 15% of our gross proceeds from the applicable offering.
	Subject to certain limitations, we will reimburse the Advisor for all of the costs it incurs in connection with the services it provides to us, including, without limitation, our allocable share of the Advisor’s overhead, which includes but is not limited to the Advisor’s rent, utilities and personnel costs; provided, that we will not reimburse the Advisor or its affiliates for services for which the Advisor or its affiliates are entitled to compensation in the form of a separate fee.
	In connection with the Offering, effective July 12, 2012, we also entered into a dealer manager agreement with Dividend Capital Securities LLC (the “Dealer Manager”), which is an entity related to our Advisor. Pursuant to this agreement, we pay (i) selling commissions up to 3% of the NAV per Class A share sold in the primary portion of the offering, (ii) a dealer manager fee which accrues daily in an amount equal to 1/365th of 0.6% of our NAV per share of Class A and Class W shares outstanding and an amount equal to 1/365th of 0.1% of our NAV per share of Class I shares outstanding on such day on a continuous basis, and (iii) a distribution fee which accrues daily in an amount equal to 1/365th of 0.5% of our NAV per share of Class A shares outstanding on such day on a continuous basis. We will cease paying the dealer manager fee and distribution fee with respect to shares sold in the Offering on the earlier to occur of the following: (i) a listing of the class of such shares on a national securities exchange, (ii) following the completion of the Offering, total underwriting compensation in this offering equaling 10% of the gross proceeds from the primary portion of the Offering, or (iii) such shares no longer being outstanding.
	On May 31, 2013, the Company and the Dealer Manager entered into Amendment No. 1 to the Dealer Manager Agreement (“Amendment No. 1”). Amendment No. 1 provided that the Company will pay to the Dealer Manager a primary dealer fee in the amount of up to 5.0% of the gross proceeds raised from the sale of Class I shares sold in the Company’s primary public offering, provided that (i) the sales are all made before July 31, 2013 (unless extended by the Company, through written notice to the Dealer Manager) and (ii) the total gross proceeds raised with respect to which the primary dealer fee will apply may not exceed $300 million. The Dealer Manager will retain 0.5% of such gross proceeds and reallow the remainder of the primary dealer fee to the participating broker-dealers involved in selling such Class I shares based on the portion of the gross proceeds raised from their customers. The primary dealer fee will be considered underwriting compensation (as defined in accordance with, and subject to the underwriting compensation limits of, applicable Financial Industry Regulatory Authority, Inc. rules).
	As of December 31, 2013 and December 31, 2012, we owed approximately $1.6 million and $1.4 million, respectively, to our Advisor and affiliates of our Advisor for such services and reimbursement of certain expenses. Pursuant to the amended Advisory Agreement, we accrue the advisory fee on a daily basis and pay our Advisor amounts due subsequent to each month-end.
	The following table summarizes fees and other amounts earned by our Advisor and its related parties in connection with services performed for us during the years ended December 31, 2013 and 2012 (amounts in thousands):
			For the Year Ended December 31,
			2013		2012		2011
	Acquisition fees		$	-	$	1,534	$	218
	Advisory fees			15,120		17,659		20,854
	Development management fee			223		133		-
	Other reimbursements			6,234		3,253		1,940
	Asset management fees related to the disposition of real properties			2,639		101		1,599
	Dealer manager and distribution fees			1,415		-		-
	Total		$	25,631	$	22,680	$	24,611
	Acquisition Fees
	Prior to entering into the Eighth Amended and Restated Advisory Agreement with our Advisor on July 12, 2012, pursuant to the previous advisory agreement in effect, we paid certain acquisition fees to our Advisor. For each real property acquired in the operating stage, the acquisition fee was an amount equal to 1.0% of our proportional interest in the purchase price of the property. For each real property acquired prior to or during the development or construction stage, the acquisition fee was an amount not to exceed 4.0% of the total project cost (which was the amount actually paid or allocated to the purchase, development, construction or improvement of a property exclusive of acquisition fees and acquisition expenses). Our Advisor also was entitled to receive an acquisition fee of 1.0% of the principal amount in connection with the origination or acquisition of any type of debt investment including, but not limited to, the origination of mortgage loans, B-notes, mezzanine debt, participating debt (including with equity-like features), non-traded preferred securities, convertible debt, hybrid instruments, equity instruments and other related investments. However, to the extent that such debt investments were originated or acquired pursuant to our agreement with our debt advisor, (defined below) such acquisitions fees may have differed. See the section below titled “The Debt Advisor” for further discussion of these fees. Subsequent to entering into the Eighth Amended and Restated Advisory Agreement with our Advisor on July 12, 2012, we no longer pay acquisition fees to our Advisor.
	Asset Management Fees
	Prior to entering into the Eighth Amended and Restated Advisory Agreement with our Advisor on July 12, 2012, pursuant to the previous advisory agreement in effect, we paid certain asset management fees to our Advisor in connection with the asset and portfolio management of real property, debt related investments and real estate securities. Our Advisor’s asset management fee was payable as follows:
	For Direct Real Properties (as defined below), the asset management fee consisted of (i) a monthly fee of one-twelfth of 0.50% of the aggregate cost (before noncash reserves and depreciation) of Direct Real Properties and (ii) a monthly fee of 6.00% of the aggregate monthly net operating income derived from all Direct Real Properties provided; however, that the aggregate monthly fee to be paid to our Advisor pursuant to these sub clauses (i) and (ii) in aggregate would not exceed one-twelfth of 0.75% of the aggregate cost (before noncash reserves and depreciation) of all Direct Real Properties.
	For Product Specialist Real Properties (as defined below), the asset management fee consisted of (i) a monthly fee of one-twelfth of 0.50% of the aggregate cost (before noncash reserves and depreciation) of Product Specialist Real Properties and (ii) a monthly fee of 6.00% of the aggregate monthly net operating income derived from all Product Specialist Real Properties.
	“Direct Real Properties”: shall mean those real properties acquired directly by us without the advice or participation of a product specialist engaged by our Advisor.
	“Product Specialist Real Properties”: shall mean those real properties acquired by us pursuant to the advice or participation of a product specialist engaged by our Advisor pursuant to a contractual arrangement.
	In addition, the asset management fee for all real property assets included a fee of 1.00% of the sales price of individual real property assets upon disposition.
	For debt related investments, other than Debt Advisor (defined below) debt related investments, and securities investments, the asset management fee consisted of a monthly fee equal to one-twelfth of 1.00% of (i) the amount invested in the case of our debt related assets within our portfolio and (ii) the aggregate value, determined at least quarterly, of our real estate-related securities.
	We also agreed to pay our Advisor certain acquisition and asset management fees that differed from the fee structure discussed above to facilitate the acquisition and management of certain debt investments that we acquired pursuant to a product specialist agreement that our Advisor entered into with the Debt Advisor (defined below). See the section below entitled “The Debt Advisor” for additional details of this agreement and the corresponding fee structure. As of July 12, 2012, we are no longer subject to this fee structure.
	Product Specialists
	In addition to utilizing its own management team, our Advisor has formed strategic alliances with recognized leaders in the real estate and investment management industries. These alliances are intended to allow our Advisor to leverage the organizational infrastructure of experienced real estate developers, operators and investment managers and to potentially give us access to a greater number of real property, debt related and real estate securities investment opportunities. The use of product specialists or other service providers does not eliminate or reduce our Advisor’s fiduciary duty to us. Our Advisor retains ultimate responsibility for the performance of all of the matters entrusted to it under the Advisory Agreement.
	Our Advisor’s product specialists are and will be compensated through a combination of (i) reallowance of acquisition, disposition, asset management and/or other fees paid by us to our Advisor and (ii) potential profit participation in connection with specific portfolio asset(s) identified by them and invested in by us. We may enter into joint ventures or other arrangements with affiliates of our Advisor to acquire, develop and/or manage real properties. Our Advisor had previously entered into joint venture and/or product specialist arrangements with three additional affiliates (Dividend Capital Investments LLC, Hudson River Partners Real Estate Investment Management L.P., and FundCore LLC), as discussed below in more detail. The agreements with these three affiliates were terminated prior to December 31, 2012.
	BCG TRT Advisors LLC
	During the year ended December 31, 2012, our Advisor entered into a product specialist agreement with BCG TRT Advisors LLC (“BCG”), in connection with advisory services related to our investments in real estate securities assets. Pursuant to this agreement, a portion of the asset management fee that our Advisor receives from us related to real estate securities investments is reallowed to BCG in exchange for services provided. Approximately $58,000 and $25,000 were incurred related to services provided by BCG during the years ended December 31, 2013 and 2012, respectively.
	The Debt Advisor
	In August 2009, our Advisor entered into a product specialist agreement (the “Debt Advisor PSA”) with FundCore Finance Group LLC (the “Debt Advisor”), an entity formed by affiliates of Hudson River Partners Real Estate Investment Management L.P. (“HRP”) and certain affiliates of our Advisor. Pursuant to the Debt Advisor PSA, the Debt Advisor had the right to perform acquisition and asset management services with respect to up to $130 million (plus any available leverage) of certain debt investments to be made by us. On August 5, 2009, our Advisor also entered into another product specialist agreement (the “HRP PSA”) with HRP. Pursuant to the HRP PSA, HRP had the right to perform the acquisition and asset management services with respect to up to $20 million (plus any available leverage) of certain debt investments to be made by us.
	The fees payable to the Advisor and its affiliates related to the acquisition and management of debt investments prior to the effectiveness of the Offering were replaced by the advisory fees as stated in the Eighth Amended and Restated Advisory Agreement, as discussed above. Accordingly, the Debt Advisor and HRP PSA agreements were terminated on July 12, 2012, in connection with the effectiveness of the Offering.
	The following is a summary of fees that were paid to our Advisor and its affiliates related to the acquisition and management of such debt investments prior to entering into the Eighth Amended and Restated Advisory Agreement in connection with the effectiveness of the Offering on July 12, 2012.
	Debt Investment Advisory Fees
	For debt investments acquired pursuant to the Debt Advisor PSA discussed above, our Advisor received an acquisition fee equal to the sum of:
		(i)	1.0% of the relevant debt investment amount;
		(ii)	any origination or similar fees paid by the applicable borrower at the time the debt investment is made (not to exceed 1.50% of the net debt investment amount); and
		(iii)	an amount equal to the discounted present value (using a discount rate of 15%) of 1.0% per annum of the net debt investment amount (taking into account any anticipated principal amortization) for a period of time equal to the lesser of the term of the debt investment (excluding extension option years) or four years (collectively referred to as the “Initial Term”). This fee was reduced by the amount payable by borrowers pursuant to clause (ii) above.
	The total acquisition fee and acquisition expenses would not exceed 6.0% of the net debt investment amount. The acquisition fee was payable on the closing date of the relevant debt investment and was reallowed in full by our Advisor to the Debt Advisor pursuant to the Debt Advisor PSA.
	Debt Investment Asset Management Fees
	For debt investments acquired pursuant to the Debt Advisor PSA discussed above, our Advisor received asset management fees pursuant to the following:
		(i)	during the first 12 months after the closing of the respective debt investment, our Advisor received a monthly asset management fee consisting of one-twelfth of the total amount, if any, by which the sum of the total acquisition fees and expenses exceeded 6.0% of the relevant net debt investment amount;
		(ii)	during the balance of the Initial Term, zero; and
		(iii)	during any period following the Initial Term during which the relevant debt investment was outstanding, the asset management fee consisted of a monthly fee of one-twelfth of 1.0% of the net debt investment amount.
	During the year ended December 31, 2012, we acquired one debt related investment pursuant to our arrangement with the Debt Advisor with an investment amount of approximately $22.5 million and paid an acquisition fee of approximately $619,000 to our Advisor, which was fully reallowed to FundCore LLC. We did not acquire any investments pursuant to our arrangement with the Debt Advisor during the years ended December 31, 2013 or 2011.

Net_Income_Loss_Per_Common_Sha

Net Income (Loss) Per Common Share	12 Months Ended
	Dec. 31, 2013
Net Income (Loss) Per Common Share [Abstract]	'
Net Income (Loss) Per Common Share	'
	12. NET INCOME (LOSS) PER COMMON SHARE
	Reconciliations of the numerator and denominator used to calculate basic net loss per common share to the numerator and denominator used to calculate diluted net loss per common share for the years ended December 31, 2013, 2012 and 2011 are described in the following table (amounts in thousands, except per share information):
		For the Year Ended December 31,
	Numerator	2013		2012		2011
	Loss from continuing operations	$	-9,084	$	-14,961	$	-43,056
	Loss from continuing operations attributable to noncontrolling interests		558		1,081		2,997
	Loss from continuing operations attributable to common stockholders		-8,526		-13,880		-40,059
	Dilutive noncontrolling interests share of loss from continuing operations		-652		-1,160		-2,959
	Numerator for diluted earnings per share – adjusted loss from continuing operations		-9,178		-15,040		-43,018
	Income (loss) from discontinued operations		65,554		-7,410		-21,510
	(Income) loss from discontinued operations attributable to noncontrolling interests		-4,560		-971		3,889
	Income (loss) from discontinued operations attributable to common stockholders		60,994		-8,381		-17,621
	Dilutive noncontrolling interests share of income (loss) from discontinued operations		4,662		-701		-1,301
	Numerator for diluted earnings per share – adjusted income (loss) from discontinued operations	$	65,656	$	-9,082	$	-18,922
	Denominator
	Weighted average shares outstanding-basic		178,196		181,982		183,813
	Incremental weighted average shares effect of conversion of OP units		13,736		15,262		13,564
	Weighted average shares outstanding-diluted		191,932		197,244		197,377
	INCOME (LOSS) PER COMMON SHARE-BASIC AND DILUTED
	Net loss from continuing operations	$	-0.05	$	-0.08	$	-0.22
	Net income (loss) from discontinued operations		0.34		-0.04		-0.09
	Net income (loss)	$	0.29	$	-0.12	$	-0.31

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2013
Segment Information [Abstract]	'
Segment Information	'
	13. SEGMENT INFORMATION
	We have four reportable operating segments, which include our three real property operating sectors (office, industrial, and retail) and debt related investments. We organize and analyze the operations and results of each of these segments independently, due to inherently different considerations for each segment. Such considerations include, but are not limited to, the nature and characteristics of the investment, and investment strategies and objectives. For example, the physical characteristics of our buildings, the related operating characteristics, the geographic markets, and the type of tenants are inherently different for each of our segments. During the year ended December 31, 2013, we reclassified amounts relating to four properties that we had previously classified within our office segment into our industrial segment for all periods presented.
	The following table sets forth revenue and the components of net operating income (“NOI”) of our segments for the years ended December 31, 2013, 2012, and 2011 (amounts in thousands).
		For the Year Ended December 31,
		Revenues							NOI
		2013		2012			2011		2013		2012		2011
	Real property (1)
	Office	$	123,838	$	122,264		$	124,438	$	95,618	$	95,625	$	97,551
	Industrial (2)		26,108		26,715			26,305		23,893		24,782		24,416
	Retail		57,382		57,937			57,007		44,145		45,974		43,985
	Debt related investments		10,449		9,409			11,107		10,449		9,409		11,107
	Total	$	217,777	$	216,325		$	218,857	$	174,105	$	175,790	$	177,059
	(1)Excludes results of operations of real properties categorized as discontinued operations.
	(2)Amounts reported for our industrial segment for the years ended December 31, 2013, 2012 and 2011 include revenue of approximately $13.0 million, $13.7 million, and $13.6 million, respectively, and NOI of approximately $11.6 million, $12.5 million, and $12.4 million, respectively, relating to four properties that we reclassified from our office segment into our industrial segment during 2013.
	We consider NOI to be an appropriate supplemental financial performance measure because NOI reflects the specific operating performance of our real properties and debt related investments, and excludes certain items that are not considered to be controllable in connection with the management of each property, such as depreciation and amortization, general and administrative expenses, asset management fees, interest expense and noncontrolling interests. However, NOI should not be viewed as an alternative measure of our financial performance as a whole, since it excludes such items that could materially impact our results of operations. Further, our NOI may not be comparable to that of other real estate companies, as they may use different methodologies for calculating NOI. Therefore, we believe net income, as defined by GAAP, to be the most appropriate measure to evaluate our overall financial performance.
	The following table is a reconciliation of our NOI to our reported net income (loss) attributable to common stockholders for the years ended December 31, 2013, 2012, and 2011 (amounts in thousands).
		For the Year Ended December 31,
		2013		2012			2011
	Net operating income	$	174,105	$	175,790	$ -	$	177,059
	Interest and other income (expense)		-153		807			2,394
	Real estate depreciation and amortization expense		-87,174		-91,127			-93,407
	General and administrative expenses		-9,973		-7,229			-6,826
	Advisory fees, related party		-15,120		-17,659			-20,854
	Acquisition-related expenses		-337		-325			-610
	Interest expense		-65,325		-69,844			-74,406
	Impairment of real estate property		-2,600		-			-
	Loss on extinguishment of debt and financing commitments		-2,507		-5,374			-
	Other-than-temporary impairment on securities		-		-			-3,369
	Provision for loss on debt related investments		-		-			-23,037
	Discontinued operations, net of taxes		65,554		-7,410			-21,510
	Net (income) loss attributable to noncontrolling interests		-4,002		110			6,886
	Net income (loss) attributable to common stockholders	$	52,468	$	-22,261		$	-57,680
	The following table reflects our total assets by business segment as of December 31, 2013 and December 31, 2012 (amounts in thousands).
		As of December 31,
		2013		2012
	Segment assets:
	Net investments in real property
	Office	$	1,092,351	$	1,245,346
	Industrial (1)		229,786		475,525
	Retail		602,505		615,897
	Debt related investments, net		123,935		187,321
	Total segment assets, net		2,048,577		2,524,089
	Non-segment assets:
	Cash and cash equivalents		24,778		36,872
	Other non-segment assets (2)		85,878		98,293
	Assets held for sale		146,176		-
	Total assets	$	2,305,409	$	2,659,254
	(1)Amounts reported for our industrial segment as of December 31, 2013 and December 31, 2012 include net investments in real property of approximately $117.9 million and $125.0 million, respectively, relating to properties that we had previously classified within our office segment.
	(2)Other non-segment assets primarily consist of corporate assets including restricted cash and receivables, including straight-line rent receivable.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	14.INCOME TAXES
	We operate in a manner intended to qualify for treatment as a REIT for U.S. federal income tax purposes. As a REIT, we generally will not be subject to federal income taxation at the corporate level to the extent we distribute 100% of our REIT taxable income annually, as defined in the Code, to our stockholders and satisfy other requirements. To continue to qualify as a REIT for federal tax purposes, we must distribute at least 90% of our REIT taxable income annually. No material provisions have been made for federal income taxes in the accompanying financial statements. We had a gross deferred tax asset of approximately $4.4 million and $4.0 million as of December 31, 2013 and 2012, respectively, which is offset by a full valuation allowance. The tax years 2009 through 2013 remain open to examination by the major taxing jurisdictions to which we are subject.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	15.COMMITMENTS AND CONTINGENCIES
	Environmental Matters
	A majority of the properties we acquire are subjected to environmental reviews either by us or the previous owners. In addition, we may incur environmental remediation costs associated with certain land parcels we may acquire in connection with the development of the land. We have acquired certain properties in urban and industrial areas that may have been leased to or previously owned by commercial and industrial companies that discharged hazardous materials. We may purchase various environmental insurance policies to mitigate our exposure to environmental liabilities. Due to the uncertainty regarding our exposure to environmental liabilities and the timing and nature of settlement of any such liabilities, we cannot estimate the effect of such potential environmental remediation on our business, financial condition, or results of operations.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data (Unaudited) [Abstract]	'
Quarterly Financial Data (Unaudited)	'
	16.QUARTERLY FINANCIAL DATA (UNAUDITED)
	The following table presents selected unaudited quarterly financial data for each quarter during the years ended December 31, 2013 and 2012 (amounts in thousands, except per share information). Certain reclassifications have been made to prior period results to conform to the current presentation. The following disclosures exclude the results from discontinued operations.
										For the
		For the Quarter Ended								Year Ended
		March 31,		June 30,		September 30,		December 31,		December 31,
		2013		2013		2013		2013		2013
	Rental revenue	$	50,636	$	51,199	$	52,113	$	53,380	$	207,328
	Debt related income		2,735		2,615		2,309		2,790		10,449
	Total revenue		53,371		53,814		54,422		56,170		217,777
	Total operating expenses		-38,199		-37,512		-38,180		-44,985		-158,876
	Other income (expenses)		-16,923		-16,599		-16,314		-18,149		-67,985
	Loss from continuing operations		-1,751		-297		-72		-6,964		-9,084
	Discontinued operations, net of taxes	$	-4,115	$	18,754	$	45,403	$	5,512		65,554
	Net income (loss)		-5,866		18,457		45,331		-1,452		56,470
	Net (income) loss attributable to noncontrolling interests		499		-1,329		-3,257		85		-4,002
	NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$	-5,367	$	17,128	$	42,074	$	-1,367	$	52,468
	Net loss per basic and diluted common share
	Continuing operations	$	-0.01	$	0	$	0	$	-0.04	$	-0.05
	Discontinued operations	$	-0.02	$	0.10	$	0.24	$	0.02	$	0.34
	NET LOSS PER BASIC AND DILUTED COMMON SHARE	$	-0.03	$	0.10	$	0.24	$	-0.02	$	0.29
										For the
		For the Quarter Ended								Year Ended
		March 31,		June 30,		September 30,		December 31,		December 31,
		2012		2012		2012		2012		2012
	Rental revenue	$	51,953	$	51,282	$	51,590	$	52,091	$	206,916
	Debt related income		1,884		1,759		3,019		2,747		9,409
	Total revenue		53,837		53,041		54,609		54,838		216,325
	Total operating expenses		-40,388		-38,900		-38,812		-38,775		-156,875
	Other income (expenses)		-18,507		-19,817		-17,398		-18,689		-74,411
	Loss from continuing operations		-5,058		-5,676		-1,601		-2,626		-14,961
	Discontinued operations, net of taxes		-4,281	$	-3,896	$	13,545		-12,778		-7,410
	Net income (loss)		-9,339		-9,572		11,944		-15,404		-22,371
	Net (income) loss attributable to noncontrolling interests		849		701		-2,680		1,240		110
	NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$	-8,490	$	-8,871	$	9,264	$	-14,164	$	-22,261
	Net loss per basic and diluted common share
	Continuing operations	$	-0.03	$	-0.03	$	-0.01	$	-0.01	$	-0.08
	Discontinued operations	$	-0.02	$	-0.02	$	0.06	$	-0.06	$	-0.04
	NET LOSS PER BASIC AND DILUTED COMMON SHARE	$	-0.05	$	-0.05	$	0.05	$	-0.07	$	-0.12

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	17. SUBSEQUENT EVENTS
	We have evaluated subsequent events for the period from December 31, 2013, the date of these financial statements, through the date these financial statements are issued.
	Disposition of Real Property
	On January 22, 2014, we disposed of a portfolio of 12 industrial properties aggregating 3.4 million square feet to an unrelated third party. The properties were located in the Atlanta, GA, Cincinnati, OH, Central Pennsylvania, Columbus, OH, Dallas, TX, Indianapolis, IN, and Minneapolis, MN markets. We sold the properties, which had a net basis of approximately $139.9 million as of December 31, 2013, for a total sales price of $175.0 million.

Schedule_III_Real_Estate_and_A

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2013
Scedule III - Real Estate and Accumulated Depreciation [Abstract]	'
Schedule III - Real Estate and Accumulated Depreciation	'
	Dividend Capital Diversified Property Fund Inc.
	Schedule III — Real Estate and Accumulated Depreciation
	As of December 31, 2013
	(dollar amounts in thousands)
						Initial Cost to Company												Gross Amount Carried at December 31, 2013
															Cost Capitalized
															or Adjustments
			No. of						Buildings and						Subsequent to						Buildings and					Accumulated	Acquisition	Depreciable
	Property	Market	Buildings		Encumbrances (1)		Land		Improvements (2)		Total Costs				Acquisition (4)				Land		Improvements (2)		Total Costs   (3, 4)			Depreciation (4)	Date	Life (years)
	Office Properties:
	Jay Street	Silicon Valley, CA	3	$	23,500	$	13,859	$	21,974	$	35,833		$		4,063		$		13,859	$	26,037	$	39,896		$	7,139	6/28/06	Mar-40
	Bala Pointe	Philadelphia, PA	1		24,000		10,115		27,516		37,631				3,418				10,115		30,934		41,049			10,430	8/28/06	Mar-40
	40 Boulevard	Chicago, IL	1		8,580		2,611		7,797		10,408				5,163				2,611		12,960		15,571			5,767	1/24/07	Jan-35
	Washington Commons	Chicago, IL	10		21,300		9,019		16,622		25,641				4,634				9,019		21,256		30,275			8,402	2/1/07	Feb-40
	Shackleford	Little Rock, AR	1		13,650		2,900		18,792		21,692				323				2,900		19,115		22,015			4,523	3/20/07	May-40
	Joyce Blvd	Fayetteville, AR	1		-		2,699		8,996		11,695				-				2,699		8,996		11,695			2,188	9/28/07	Oct-40
	DeGuigne	Silicon Valley, CA	1		7,498		5,841		13,861		19,702				1,038				5,841		14,899		20,740			5,318	11/21/07	May-40
	Eden Prairie (ATK)	Minneapolis/St Paul, MN	1		-		3,538		25,865		29,403				38				3,538		25,903		29,441			4,908	10/3/08	15-40
	Austin-Mueller Healthcare	Austin, TX	1		19,786		2,663		42,315		44,978				-				2,663		42,315		44,978			8,108	12/23/08	Nov-40
	1300 Connecticut	Washington, DC	1		46,421		25,177		41,250		66,427				2,928				25,177		44,178		69,355			14,373	3/10/09	May-40
	Campus Road Office Center	Princeton, NJ	1		34,227		5,302		45,773		51,075				88				5,302		45,861		51,163			7,690	11/3/09	May-40
	Preston Sherry Plaza	Dallas, TX	1		22,807		7,500		22,303		29,803				4,688				7,500		26,991		34,491			7,746	12/16/09	Mar-40
	Park Place	Dallas, TX	1		-		4,075		19,625		23,700				5,383				4,075		25,008		29,083			8,895	12/16/09	Mar-40
	Doolittle Drive	Los Angeles, CA	1		10,243		9,700		13,142		22,842				410				9,700		13,552		23,252			7,431	6/25/10	Apr-40
	South Havana Street	Denver, CO	1		-		3,925		8,607		12,532				2				3,925		8,609		12,534			6,072	6/25/10	Apr-40
	Sheila Street	Los Angeles, CA	1		8,907		6,150		17,536		23,686				-1				6,150		17,535		23,685			4,647	6/25/10	Oct-40
	Corporate Center Drive	Los Angeles, CA	1		12,469		6,700		21,303		28,003				1,957				6,700		23,260		29,960			11,238	6/25/10	Oct-40
	Harborside Plaza	Northern New Jersey	1		114,424		16,800		193,742		210,542				1,415				16,800		195,157		211,957			42,153	6/25/10	Jul-40
	Colshire Drive	Washington, DC	1		-		21,100		157,983		179,083				-5				21,100		157,978		179,078			38,513	6/25/10	Jul-40
	Sylvan Way	Northern New Jersey	1		16,344		5,200		32,439		37,639				-1				5,200		32,438		37,638			4,794	6/25/10	13-40
	Sunset Hills Road	Washington, DC	1		13,984		2,700		31,915		34,615				36				2,700		31,951		34,651			9,949	6/25/10	May-40
	Shadelands Drive	East Bay, CA	1		-		2,500		3,562		6,062				33				2,500		3,595		6,095			3,416	6/25/10	Mar-40
	Sybase Drive	East Bay, CA	1		-		8,400		136,797		145,197				45				8,400		136,842		145,242			34,463	6/25/10	Jul-40
	1600 SW 80th Street	Miami, FL	1		19,372		12,700		35,483		48,183				49				12,700		35,532		48,232			6,247	6/25/10	Dec-40
	Connection Drive	Dallas, TX	1		23,870		3,110		50,121		53,231				112				3,110		50,233		53,343			9,233	6/25/10	Sep-40
	655 Montgomery	San Francisco, CA	1		57,827		32,632		82,195		114,827				1,486				32,632		83,681		116,313			1,089	11/7/13	Jan-40
	Total Office Properties		37		499,209		226,916		1,097,514		1,324,430				37,302				226,916		1,134,816		1,361,732			274,732
								Initial Cost to Company								Gross Amount Carried at December 31, 2013
														Cost Capitalized
														or Adjustments
				No. of						Buildings and				Subsequent to				Buildings and				Accumulated	Acquisition	Depreciable
	Property		Market	Buildings		Encumbrances (1)		Land		Improvements (2)		Total Costs		Acquisition (4)		Land		Improvements (2)		Total Costs   (3, 4)		Depreciation (4)	Date	Life (years)
	Industrial Properties:
	Lundy Avenue		Silicon Valley, CA	3	$	14,250	$	5,982	$	15,459	$	21,441	$	-2,542	$	5,117	$	13,872	$	18,989	$	5,752	9/28/06	19-40
	Shiloh Road		Dallas, TX	3		22,700		5,162		30,192		35,354		79		5,162		30,271		35,433		9,389	12/21/06	Oct-40
	Rickenbacker		Columbus, OH	1		6,926		1,249		13,308		14,557		699		1,249		14,007		15,256		4,562	10/16/06	Mar-40
	Park West Q		Cincinnati, OH	1		5,164		1,653		9,597		11,250		805		1,653		10,402		12,055		3,872	10/16/06	May-40
	Eagle Creek East		Minneapolis/St Paul, MN	1		4,298		1,644		7,676		9,320		392		1,644		8,068		9,712		2,827	10/16/06	May-40
	Park West L		Cincinnati, OH	1		3,587		902		7,393		8,295		333		902		7,726		8,628		2,380	10/31/06	Feb-40
	Eagle Creek West		Minneapolis/St Paul, MN	1		4,869		1,910		8,474		10,384		506		1,910		8,980		10,890		2,801	10/31/06	Mar-40
	Minnesota Valley III		Minneapolis/St Paul, MN	1		6,091		2,223		12,462		14,685		1,107		2,223		13,569		15,792		4,223	10/31/06	Oct-40
	Plainfield III		Indianapolis, IN	1		12,000		2,101		18,424		20,525		2,469		2,101		20,893		22,994		5,769	3/28/07	Sep-40
	Patriot Drive I		Dallas, TX	1		4,625		1,034		5,548		6,582		1,186		1,034		6,734		7,768		2,003	3/28/07	Mar-40
	Patriot Drive II		Dallas, TX	1		18,375		3,166		23,072		26,238		5,137		3,166		28,209		31,375		7,645	3/28/07	May-40
	Creekside V		Columbus, OH	1		4,725		764		5,628		6,392		18		764		5,646		6,410		2,029	6/15/07	Aug-40
	Greenwood Parkway		Atlanta, GA	1		-		2,040		20,830		22,870		402		2,040		21,232		23,272		6,098	10/29/07	Oct-40
	Westport		Central PA	1		9,767		2,376		27,081		29,457		7		2,376		27,088		29,464		6,417	1/9/08	Oct-40
	6900 Riverport		Louisville, KY	1		1,645		751		4,131		4,882		103		751		4,234		4,985		981	9/17/08	Oct-40
	7000 Riverport		Louisville, KY	1		2,593		1,124		6,821		7,945		429		1,124		7,250		8,374		1,971	9/17/08	Mar-40
	7050 Riverport		Louisville, KY	1		1,424		672		3,862		4,534		252		672		4,114		4,786		1,254	9/17/08	May-40
	7201 Riverport		Louisville, KY	1		2,636		1,130		6,614		7,744		225		1,130		6,839		7,969		1,769	9/17/08	Mar-40
	East Maple Avenue		Los Angeles, CA	1		16,924		6,400		71,761		78,161		-1		6,400		71,760		78,160		7,063	6/25/10	16-40
	N. Glenville Drive		Dallas, TX	1		3,563		1,580		6,610		8,190		-1		1,580		6,609		8,189		1,709	6/25/10	Jun-40
South Columbia		Central Kentucky	1		11,579		730		25,092		25,822		-2		730		25,090		25,820		8,682	6/25/10	Apr-40
Columbia Road		Cleveland, OH	1		8,684		2,525		17,337		19,862		3,943		2,525		21,280		23,805		3,423	6/25/10	Jun-40
200 Corporate Drive		Chicago, IL	1		8,907		925		18,937		19,862		798		925		19,735		20,660		4,097	6/25/10	Aug-40
Vickery Drive		Houston, TX	1		18,537		3,700		37,639		41,339		-1		3,700		37,638		41,338		7,514	6/25/10	Aug-40
East 28th Avenue		Denver, CO	1		2,794		800		5,431		6,231		1		800		5,432		6,232		1,348	6/25/10	Aug-40
Total Industrial Properties			29		196,663		52,543		409,379		461,922		16,434		51,678		426,678		478,356		105,578
						Initial Cost to Company								Gross Amount Carried at December 31, 2013
												Cost Capitalized
												or Adjustments
		No. of						Buildings and				Subsequent to				Buildings and				Accumulated	Acquisition	Depreciable
Property	Market	Buildings		Encumbrances (1)		Land		Improvements (2)		Total Costs		Acquisition (4)		Land		Improvements (2)		Total Costs   (3, 4)		Depreciation (4)	Date	Life (years)
Retail Properties:
Bandera Road	San Antonio, TX	1	$	21,500	$	8,221	$	23,472	$	31,693	$	367	$	8,221	$	23,839	$	32,060	$	5,883	2/1/07	May-45
Beaver Creek	Raleigh, NC	1		26,200		13,017		31,375		44,392		792		13,017		32,167		45,184		7,386	5/11/07	Mar-40
Centerton Square	Philadelphia, PA	1		67,800		26,488		76,838		103,326		831		26,488		77,669		104,157		19,359	5/11/07	Apr-57
Mt. Nebo	Pittsburgh, PA	1		16,000		9,371		16,214		25,585		-1,117		9,502		14,966		24,468		1,984	5/11/07	Apr-40
CB Square	Jacksonville, FL	1		-		3,768		16,660		20,428		-929		3,768		15,731		19,499		3,149	6/27/07	Jul-40
Braintree	Boston	1		-		9,270		31,266		40,536		520		9,270		31,786		41,056		8,328	8/1/07	May-40
Holbrook	Boston	1		-		4,590		14,724		19,314		191		4,590		14,915		19,505		4,511	8/1/07	May-40
Kingston	Boston	1		10,574		8,580		12,494		21,074		742		8,580		13,236		21,816		4,109	8/1/07	May-40
Manomet	Boston	1		-		1,890		6,480		8,370		353		1,890		6,833		8,723		1,949	8/1/07	May-40
Orleans	Boston	1		14,070		8,780		23,683		32,463		178		8,780		23,861		32,641		5,321	8/1/07	Apr-40
Sandwich	Boston	1		15,825		7,380		25,778		33,158		65		7,380		25,843		33,223		5,515	8/1/07	Mar-40
Wareham	Boston	1		24,400		13,130		27,030		40,160		1,658		13,130		28,688		41,818		6,904	8/1/07	Feb-40
Abington	Boston	1		4,817		14,396		594		14,990		-		14,396		594		14,990		497	8/1/07	Aug-63
Hyannis	Boston	1		4,770		10,405		917		11,322		-		10,405		917		11,322		319	8/1/07	18-68
Rockland 201 Market	Boston	1		-		2,417		86		2,503		-		2,417		86		2,503		86	8/1/07	35
Mansfield	Boston	1		8,600		5,340		16,490		21,830		-		5,340		16,490		21,830		3,247	8/1/07	16-86
Meriden	Boston	1		-		6,560		22,013		28,573		-		6,560		22,013		28,573		4,570	8/1/07	13-43
Weymouth	Boston	1		-		5,170		19,396		24,566		-257		4,913		19,396		24,309		4,958	8/1/07	19-40
Whitman 475 Bedford Street	Boston	1		7,459		3,610		11,682		15,292		-		3,610		11,682		15,292		2,377	8/1/07	16-56
Brockton Eastway Plaza	Boston	1		-		2,530		2,074		4,604		214		2,530		2,288		4,818		1,076	8/1/07	Mar-40
Cohasset	Boston	1		-		3,920		7,765		11,685		433		3,920		8,198		12,118		2,165	8/1/07	Mar-40
Cranston	Boston	1		-		1,810		4,233		6,043		109		1,810		4,342		6,152		1,884	8/1/07	Feb-40
Hanover	Boston	1		-		1,490		5,084		6,574		388		1,490		5,472		6,962		1,394	8/1/07	May-40
Rockland 360-372 Market	Boston	1		-		1,200		2,437		3,637		-		1,200		2,437		3,637		944	8/1/07	Jun-40
Brockton Westgate Plaza	Boston	1		-		3,650		6,507		10,157		5		3,650		6,512		10,162		2,066	8/1/07	Nov-40
Harwich	Boston	1		5,896		5,290		8,814		14,104		-		5,290		8,814		14,104		1,696	10/18/07	21-40
New Bedford	Boston	1		8,237		3,790		11,152		14,942		-		3,790		11,152		14,942		2,055	10/18/07	22-40
Norwell	Boston	1		6,061		5,850		14,547		20,397		-		5,850		14,547		20,397		2,868	10/18/07	15-65
Greater DC Retail	Washington, DC	1		38,926		19,779		42,515		62,294		330		19,781		42,843		62,624		12,866	4/6/09	May-40
Springdale	Boston	1		-		8,850		-		8,850		3,744		11,867		727		12,594		187	2/18/11	Jun-62
Saugus	Boston	1		-		3,783		9,677		13,460		100		3,783		9,777		13,560		2,884	3/17/11	Mar-40
Total Retail Properties		31		281,135		224,325		491,997		716,322		8,717		227,218		497,821		725,039		122,537
Land held
Inverness land	Denver, CO	0		-		5,200		-		5,200		-		5,200		153		5,353		-	6/25/10	N/A
Total land held		0		-	-	5,200		-	-	5,200		-		5,200	-	153		5,353		-
Grand Total		97		977,007	$	508,984	$	1,998,890	$	2,507,874	$	62,453	$	511,013	$	2,059,467	$	2,570,480	$	502,847
(1)Encumbrances represents mortgage debt principal balances encumbering each property as of December 31, 2013.
(2)Building and improvements include intangible lease assets.
(3)As of December 31, 2013, the aggregate cost for federal income tax purposes of investments in real property was approximately $2.2 billion (unaudited).
(4)Amount is presented net of impairments and other write-offs of tenant-related assets that were recorded at acquisition as part of our purchase price accounting. Such write-offs are the results of lease expirations and terminations.
The following table summarizes activity for real estate and accumulated depreciation for the years ended December 31, 2013, 2012, and 2011. The balance of investments in real estate at the end of the year ended December 31, 2013 includes amounts related to properties classified as held for sale (amounts in thousands):
		For the Year Ended December 31,
		2013			2012			2011
Investments in real estate:
Balance at the beginning of the year		$	2,819,550		$	2,724,684		$	2,858,307
Acquisitions of operating properties			114,827			128,258			21,825
Improvements			26,680			18,405			18,944
Basis of operating properties disposed of			-387,977			-46,097			-150,892
Impairment of real property			-2,600			-5,700			-23,500
Balance at the end of the year		$	2,570,480		$	2,819,550		$	2,724,684
Accumulated depreciation:
Balance at the beginning of the year		$	482,782		$	361,357		$	247,608
Net additions charged to costs and expenses			20,065			121,425			113,749
Balance at the end of the year		$	502,847		$	482,782		$	361,357

Recovered_Sheet1

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2013
Summary Of Significant Accounting Policies [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation
	Due to our control of our Operating Partnership through our sole general partnership interest and the limited rights of the limited partners, we consolidate our Operating Partnership, and limited partner interests not held by us are reflected as noncontrolling interests in the accompanying consolidated financial statements (herein referred to as “financial statements”). All significant intercompany accounts and transactions have been eliminated in consolidation.
	Our financial statements also include the accounts of our consolidated subsidiaries and joint ventures through which we are the primary beneficiary, when such subsidiaries and joint ventures are variable interest entities, or through which we have a controlling interest. In determining whether we have a controlling interest in a joint venture and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity in which we have the power to direct the activities that most significantly impact the entity’s economic performance and the obligation to absorb losses that could potentially be significant to the entity or the right to receive benefits that could potentially be significant to the entity.
	All joint ventures in which we have investments are variable interest entities. All of our investments in joint ventures represent our interests in real estate partnerships, formed for the purpose of acquiring, leasing, managing, holding for investment, selling and otherwise dealing with real property investments. Our involvement with our joint ventures affects our financial position, financial performance and cash flows in ways similar to direct ownership of real property investment. We own a significantly disproportionate majority of the ownership interests of our joint ventures. In each of our joint ventures, our joint venture partner performs the day-to-day management of the real properties owned by the respective joint ventures. However, in each of our joint ventures, we approve the activities that most significantly impact the joint venture’s economic performance. Due to our substantive approval rights and our exposure to the economic returns and losses of each of the joint ventures, we are the primary beneficiary of each of our joint ventures. Based on these considerations, we consolidate all of our investments in joint ventures. See our consolidated balance sheets for disclosure of the amount of real property and mortgage note borrowings that we consolidated through our investments in variable interest entities as of December 31, 2013 and 2012.
	Judgments made by us with respect to our level of influence or control of an entity and whether we are the primary beneficiary of a variable interest entity involve consideration of various factors, including the form of our ownership interest, the size of our investment (including loans), our ability to direct the activities of the entity, and our obligation to absorb the losses of, or, our right to receive benefits from the entity. Our ability to correctly assess our influence or control over an entity affects the presentation of these investments in our financial statements and, consequently, our financial position and specific items in our results of operations that are used by our stockholders, lenders and others in their evaluation of us. The maximum risk of loss related to our investment in these consolidated variable interest entities is limited to our recorded investments in such entities. The creditors of the consolidated variable interest entities do not have recourse to our general credit.
	Generally, we consolidate real estate partnerships and other entities that are not variable interest entities when we own, directly or indirectly, a majority voting interest in the entity.
Reclassifications	'
	Reclassifications
	Certain amounts included in the accompanying financial statements for 2012 and 2011 have been reclassified to conform to the 2013 financial statement presentation. Balance sheet amounts for properties classified as held for sale have been reclassified as of December 31, 2013. Statement of operations amounts for properties disposed of or classified as held for sale have been reclassified to discontinued operations for all periods presented. Amounts in our segment and quarterly financial data disclosures in Notes 13 and 16 reflect the reclassification of amounts related to properties that have been disposed of or classified as held for sale as of December 31, 2013.
Investments	'
	Investments
	Real Property
	Costs associated with the acquisition of real property, including acquisition fees paid to our Advisor, are expensed as incurred. In addition, we estimate the fair value of contingent consideration and contingencies related to acquisitions of real property in determining the total cost of the property acquired. Subsequent changes in the fair value of such contingent consideration are recorded either as a gain or loss in our statement of operations. Contingencies are subsequently adjusted through the statement of operations when new information becomes available indicating that settlement of a contingent liability is probable and can be estimated at an amount greater than the acquisition date fair value, or the contingency is resolved, in which case the contingent asset or liability is derecognized.
	Costs associated with the development and improvement of our real property assets are capitalized as incurred. Costs incurred in making repairs and maintaining real estate assets are expensed as incurred. During the land development and construction periods, we capitalize interest costs, insurance, real estate taxes and certain general and administrative costs if such costs are incremental and identifiable to a specific activity to get the asset ready for its intended use. The results of operations for acquired real property are included in our accompanying statements of operations from their respective acquisition dates.
	Upon acquisition, the total cost of a property is allocated to land, building, building and land improvements, tenant improvements and intangible lease assets and liabilities. The purchase price allocation of the total cost to land, building, building improvements, tenant improvements, intangible lease assets and intangible lease liabilities is based on our estimate of the property’s as-if vacant fair value. The as-if vacant fair value is calculated by using all available information such as the replacement cost of such asset, appraisals, property condition reports, market data and other related information. The difference between the fair value and the face value of debt assumed in an acquisition is recorded as an adjustment to the purchase price allocation. The allocation of the total cost of a property to an intangible lease asset includes the value associated with the in-place leases, which may include lost rent, leasing commissions, tenant improvements, legal and other costs.
	We record acquired “above-market” and “below-market” leases at their fair value equal to the difference between the contractual amounts to be paid pursuant to each in-place lease and our estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining term of the lease plus the term of any below-market fixed-rate renewal option periods for below-market leases. In addition, we allocate a portion of the purchase price of an acquired property to the estimated value of customer relationships, if any. As of December 31, 2013, we had not recognized any estimated value to customer relationships.
	Intangible in-place lease assets are amortized over the corresponding lease term. Above-market lease assets are amortized as a reduction in rental revenue over the corresponding lease term. Below-market lease liabilities are amortized as an increase in rental revenue over the corresponding lease term, plus any applicable below-market fixed-rate renewal option periods. The following table summarizes the amounts that we have incurred in amortization expense for intangible lease assets and adjustments to rental revenue for above-market lease assets and below-market lease liabilities for the years ended December 31, 2013, 2012 and 2011 (amounts in thousands).
		For the Year Ended December 31,
		2013		2012		2011
	Above-market lease assets	$	-7,293	$	-8,050	$	-8,393
	Below-market lease liabilities		7,537		9,567		9,756
	Net increase to rental revenue	$	244	$	1,517	$	1,363
	Intangible lease asset amortization	$	-62,325	$	-80,739	$	-77,452
	We expense any unamortized intangible lease asset or record an adjustment to rental revenue for any unamortized above-market lease asset or below-market lease liability when a tenant terminates a lease before the stated lease expiration date. We recorded an insignificant amount of adjustments related to write-offs of unamortized intangible lease assets and liabilities due to early lease terminations during the years ended December 31, 2013, 2012 and 2011.
	Real property assets, including land, building, building and land improvements, tenant improvements, lease commissions, and intangible lease assets and liabilities are stated at historical cost less accumulated depreciation and amortization. Depreciation and amortization are computed on a straight-line basis over their estimated useful lives as described in the following table.
	Description		Depreciable Life
	Land		Not depreciated
	Building		40 years
	Building and land improvements		5-20 years
	Tenant improvements		Lesser of useful life or lease term
	Lease commissions		Over lease term
	Intangible in-place lease assets		Over lease term
	Above-market lease assets		Over lease term
	Below-market lease liabilities		Over lease term, including below-market fixed-rate renewal options
	The following table presents expected amortization during the next five years and thereafter related to the acquired above-market lease assets, below-market lease liabilities and acquired in-place lease intangibles, for properties owned (including properties classified as held for sale) as of December 31, 2013 (amounts in thousands).
		For the Year Ended December 31,
		2014		2015		2016		2017		2018		Thereafter		Total
	Acquired below-market lease liabilities	$	7,125	$	5,895	$	5,201	$	4,975	$	4,920	$	49,433	$	77,549
	Acquired above-market lease assets		-6,716		-6,315		-6,248		-3,711		-1,418		-1,897		-26,305
	Net rental revenue increase (decrease)	$	409	$	-420	$	-1,047	$	1,264	$	3,502	$	47,536	$	51,244
	Acquired in-place lease intangible amortization	$	47,544	$	40,203	$	37,527	$	22,382	$	12,099	$	29,002	$	188,757
	Discontinued Operations and Held for Sale
	Discontinued operations represent properties that we have either disposed of or have classified as held for sale if both the operations and cash flows of the property have been or will be eliminated from our ongoing operations as a result of the disposal transaction and if we will not have any significant continuing involvement in the operations of the property after the disposal transaction. The results of operations of properties that have been classified as discontinued operations are also reported as discontinued operations for all periods presented. We classify real property as held for sale when our management commits to a plan to sell the property, the plan has appropriate approvals, the sale of the property is probable, and certain other criteria are met. At such time, the respective assets and liabilities are presented separately on our balance sheets and depreciation is no longer recognized. Assets held for sale are reported at the lower of their carrying amount or their estimated fair value less the costs to sell the assets. We recognize an impairment loss if the current net book value of the property exceeds its fair value less selling costs.  As of December 31, 2013 and 2012, 12 and zero of our properties were classified as held for sale, respectively.
	Debt Related Investments
	Debt related investments are considered to be held for investment, as we have both the intent and ability to hold these investments until maturity. Accordingly, these assets are carried at cost, net of unamortized loan origination costs and fees, discounts, repayments and unfunded commitments unless such loans or investments are deemed to be impaired.
Revenue Recognition	'
	Revenue Recognition
	Revenue Recognition — Real Property
	We record rental revenue for the full term of each lease on a straight-line basis. Certain properties have leases that offer the tenant a period of time where no rent is due or where rent payments increase during the term of the lease. Accordingly, we record a receivable from tenants for rent that we expect to collect over the remaining lease term rather than currently, which is recorded as straight-line rents receivable. When we acquire a property, the term of existing leases is considered to commence as of the acquisition date for purposes of this calculation. Tenant recovery income includes payments from tenants for real estate taxes, insurance and other property operating expenses and is recognized as rental revenue.
	The following table summarizes straight-line rental adjustments and tenant recovery income received from tenants for real estate taxes, insurance and other property operating expenses and recognized as rental revenue for the years ended December 31, 2013, 2012, and 2011 (amounts in thousands):
		For the Year Ended December 31,
		2013		2012		2011
	Straight-line rent adjustments	$	8,864	$	8,107	$	9,902
	Tenant recovery income	$	33,029	$	33,585	$	33,445
	Revenue Recognition — Debt Related Investments
	Interest income on debt related investments is recognized over the life of the investment using the effective interest method and is recognized on an accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan. Anticipated exit fees, where collection is expected, are also recognized over the term of the debt related investment. A debt related investment is considered to be non-performing and is placed on non-accrual status when it becomes delinquent and management determines it is probable that it will be unable to collect all amounts due according to contractual terms. While on non-accrual status, debt related investments are accounted for on a cash basis, where interest income is recognized only upon actual receipt of cash. Non-accrual debt investments are returned to accrual status when they become contractually current and management believes it will collect all amounts contractually due.
Impairment	'
	Impairment
	Impairment — Real Property
	We review our investments in real property that are classified as held and used individually on a quarterly basis, and more frequently when such an evaluation is warranted, to determine their appropriate classification, as well as whether there are indicators of impairment.
	As of December 31, 2013, 70 of our properties are classified as held and used. These held and used assets are reviewed for indicators of impairment, which may include, among others, each tenant’s inability to make rent payments, operating losses or negative operating trends at the property level, notification by a tenant that it will not renew its lease, a decision to dispose of a property, including a change in estimated holding periods, or adverse changes in the fair value of any of our properties. If indicators of impairment exist on a held and used asset, we compare the future estimated undiscounted cash flows from the expected use of the property to its net book value to determine if impairment exists. If the sum of the future estimated undiscounted cash flows is greater than the current net book value, we conclude no impairment exists. If the sum of the future estimated undiscounted cash flows is less than its current net book value, we recognize an impairment loss for the difference between the net book value of the property and its estimated fair value. If our assumptions, projections or estimates regarding a property change in the future, we may have to record an impairment charge to reduce or further reduce the net book value of the property. See Note 3 for a discussion of impairment charges relating to our real properties recorded during the years ended December 31, 2013, 2012, and 2011.
	Impairment — Debt Related Investments
	We review our debt related investments on a quarterly basis, and more frequently when such an evaluation is warranted, to determine if impairment exists. A debt related investment is impaired when, based on current information and events including economic, industry and geographical factors, it is probable that we will be unable to collect all amounts due, both principal and interest, according to the contractual terms of the agreement. When our investment is deemed impaired, the impairment is measured based on the expected future cash flows discounted at the investment’s effective interest rate. As a practical expedient, we may measure impairment based on the fair value of the collateral of an impaired collateral-dependent investment or to measure impairment based on an observable market price for the impaired investment as an alternative to discounting expected future cash flows. Regardless of the measurement method, we measure impairment based on the fair value of the collateral when it is determined that foreclosure is probable. A debt related investment is also considered impaired if its terms are modified in a troubled debt restructuring (“TDR”). A TDR occurs when we grant a concession to a borrower in financial difficulty by modifying the original terms of the loan. Impairments on TDR loans are generally measured based on the present value of expected future cash flows discounted at the effective interest rate of the original loan. See Note 4 for a discussion of impairment charges relating to our debt related investments recorded during the years ended December 31, 2013, 2012, and 2011.
	Impairment — Real Estate Securities
	As of both December 31, 2013 and 2012, we held investments in real estate securities of approximately $0.5 million. Real estate securities are included in other assets, net, in the accompanying balance sheets.
	During the years ended December 31, 2013, 2012, and 2011, we recorded approximately $0,  $0 and $3.4 million, respectively, related to other-than-temporary impairment of our CMBS and CRE-CDO securities. Due to volatility with the credit market and its unpredictable impact for such securities, we determined that we cannot reliably predict the timing and amount of cash flows that we expect to receive related to the majority of our CMBS and CRE-CDO securities. Therefore, we account for such securities under the cost recovery method of accounting. The application of the cost recovery method of accounting requires that we cease recognizing interest income related to these securities until the amortized cost of each respective security is depleted or until we can reliably estimate cash flows. Once the amortized cost of each security is depleted or we can reasonably estimate cash flows, cash payments will be recorded to interest income. Under the cost recovery method of accounting, if the fair value of a security falls below the amortized cost of that security and we do not anticipate that the receipt of near term cash flows will sufficiently reduce the security’s amortized cost below its fair value, then we recognize an other-than-temporary impairment in an amount equal to the difference between that security’s fair value and its amortized cost.
Credit Losses	'
	Credit Losses
	A credit loss represents the difference between the present value of expected future cash flows and the amortized cost basis of a debt security. As of both December 31, 2013 and 2012, we had recognized approximately $140.1 million of cumulative credit losses in other-than-temporary impairment related to our investments in debt securities. We recorded impairment losses of $0,  $0, and $3.4 million for each of the years ended December 31, 2013, 2012, and 2011, respectively.
Derivative Instruments and Hedging Activities	'
	Derivative Instruments and Hedging Activities
	We record all derivative instruments in the accompanying balance sheets at fair value. Accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative instrument and the designation of the derivative instrument. Derivative instruments used to hedge exposure to changes in the fair value of an asset, liability, or firm commitments attributable to a particular risk, such as interest rate risk, are considered “fair value” hedges. Derivative instruments used to hedge exposure to variability in expected future cash flows, such as future interest payments, or other types of forecasted transactions, are considered “cash flow” hedges. We do not have any fair value hedges.
	For derivative instruments designated as cash flow hedges, the changes in the fair value of the derivative instrument that represent changes in expected future cash flows, which are effectively hedged by the derivative instrument, are initially reported as other comprehensive income (loss) in the statement of equity until the derivative instrument is settled. Upon settlement, the effective portion of the hedge is recognized as other comprehensive income (loss) and amortized over the term of the designated cash flow or transaction the derivative instrument was intended to hedge. The change in value of any derivative instrument that is deemed to be ineffective is charged directly to earnings when the determination of hedge ineffectiveness is made. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For purposes of determining hedge ineffectiveness, management estimates the timing and potential amount of future fixed-rate debt issuances each quarter in order to estimate the cash flows of the designated hedged item or transaction. Management considers the likelihood of the timing and amount of entering into such forecasted transactions when determining the expected future fixed-rate debt issuances. We do not use derivative instruments for trading or speculative purposes. We classify cash paid to settle our forward starting swaps as financing activities in our statements of cash flows.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash and cash equivalents consist of cash on hand and highly liquid investments with original maturities of three months or less such as money market mutual funds or certificates of deposits. As of both December 31, 2013 and 2012, we have not realized any losses in such cash accounts or investments and believe that we are not exposed to any significant credit risk.
Restricted Cash	'
	Restricted Cash
	Restricted cash consists primarily of lender and property-related escrow accounts. As of both December 31, 2013 and 2012, we had not realized any losses in such restricted cash accounts or investments related to, and believe that we are not exposed to any significant credit risk.
Collectability of Receivables	'
	Collectability of Receivables
	We evaluate the collectability of our rent and other receivables on a regular basis based on factors including, among others, payment history, the financial strength of the tenant or borrower and any guarantors. Specifically with regards to our debt related investments, we evaluate the collectability of our receivables based on factors including, among others, the value of the underlying collateral, the operations and operating trends of the underlying collateral, if any, the asset type and current economic conditions. If our evaluation of these factors indicates we may not recover the full amount of the receivable, we provide a reserve against the portion of the receivable that we estimate may not be recovered. This analysis requires us to determine whether there are factors indicating a receivable may not be fully collectible and to estimate the amount of the receivable that may not be collected. As of December 31, 2013 and 2012, we had allowances included in the caption other assets, net, in our accompanying balance sheets of approximately $251,000 and $510,000, respectively, related to our rent and other receivables. If our assumptions or estimates regarding the collectability of a receivable change in the future, we may have to record allowances to reduce or further reduce the carrying value of the receivable.
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (Loss)
	Accumulated other comprehensive income (loss) as reported in the accompanying statements of equity primarily consists of the cumulative loss related to our derivatives of $8.8 million, before attribution to noncontrolling interests of $1.0 million, and cumulative gain related to our real estate securities of approximately $411,000, before attribution of a cumulative loss to noncontrolling interests of $1.3 million.
Basic and Diluted Net Income (Loss) per Common Share	'
	Basic and Diluted Net Income (Loss) per Common Share
	Basic net income (loss) per common share is determined by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per common share includes the effects of potentially issuable common stock, but only if dilutive, including the presumed exchange of OP Units.
Income Taxes	'
	Income Taxes
	We operate in a manner intended to qualify as a REIT for U.S. federal income tax purposes. As a REIT, we generally will not be subject to federal income taxes on net income that we distribute to our stockholders. We intend to make timely distributions sufficient to satisfy the annual distribution requirements. We believe we are organized and operate in such a manner and intend to operate in the foreseeable future in such a manner to qualify as a REIT for federal income tax purposes. We are, however, subject to certain state and local taxes. Our taxable REIT subsidiary, DCTRT Leasing Corporation, is also subject to federal, state, and local taxes.
Use of Estimates	'
	Use of Estimates
	The preparation of the financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions relating to the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ materially from those estimates. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the periods they are determined to be necessary.
New Accounting Pronouncements	'
	New Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board (the “FASB”) issued accounting standards update (“ASU”) 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation Is Fixed at the Reporting Date, (“ASU 2013-04”) which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date.  This will require an entity to measure those obligations as the sum of the amount the entity agreed to pay on the basis of its arrangement among its co-obligors as well as any additional amount the entity expects to pay on behalf of its co-obligors.  ASU 2013-04 also requires an entity to disclose the nature and amount of those obligations.  The amendments in this ASU are effective for reporting periods beginning after December 15, 2013, with early adoption permitted.  Retrospective application is required.  We do not believe that the adoption of ASU 2013-04 will have a material impact on our consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, that requires disclosure of the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount is required under GAAP to be reclassified in its entirety to net income. Additionally, the update requires disclosure of changes in each component of other comprehensive income. The disclosure requirements were retroactively effective for us beginning January 1, 2013. As this guidance only requires expanded disclosure, the adoption did not have a significant impact on our consolidated financial statements

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Summary Of Significant Accounting Policies [Abstract]	'
Schedule of Adjustments to Rental Revenue Related to Amortization of Above-Market Lease Assets, Below-Market Lease Liabilities, and for Straight-Line Rental Adjustments	'
		For the Year Ended December 31,
		2013		2012		2011
	Above-market lease assets	$	-7,293	$	-8,050	$	-8,393
	Below-market lease liabilities		7,537		9,567		9,756
	Net increase to rental revenue	$	244	$	1,517	$	1,363
	Intangible lease asset amortization	$	-62,325	$	-80,739	$	-77,452
Depreciation and Amortization Computed on Straight-Line Basis over Estimated Useful Lives	'
	Description		Depreciable Life
	Land		Not depreciated
	Building		40 years
	Building and land improvements		5-20 years
	Tenant improvements		Lesser of useful life or lease term
	Lease commissions		Over lease term
	Intangible in-place lease assets		Over lease term
	Above-market lease assets		Over lease term
	Below-market lease liabilities		Over lease term, including below-market fixed-rate renewal options
Expected Amortization During Next Five Years and Thereafter Related to Acquired Above-Market Lease Assets, Below-Market Lease Liabilities and Acquired In-Place Lease Intangibles	'
		For the Year Ended December 31,
		2014		2015		2016		2017		2018		Thereafter		Total
	Acquired below-market lease liabilities	$	7,125	$	5,895	$	5,201	$	4,975	$	4,920	$	49,433	$	77,549
	Acquired above-market lease assets		-6,716		-6,315		-6,248		-3,711		-1,418		-1,897		-26,305
	Net rental revenue increase (decrease)	$	409	$	-420	$	-1,047	$	1,264	$	3,502	$	47,536	$	51,244
	Acquired in-place lease intangible amortization	$	47,544	$	40,203	$	37,527	$	22,382	$	12,099	$	29,002	$	188,757
Schedule of Straight-Line Rent Adjustments and Tenant Recovery Income	'
		For the Year Ended December 31,
		2013		2012		2011
	Straight-line rent adjustments	$	8,864	$	8,107	$	9,902
	Tenant recovery income	$	33,029	$	33,585	$	33,445

Investments_in_Real_Property_T

Investments in Real Property (Tables)	12 Months Ended
	Dec. 31, 2013
Investments in Real Property [Abstract]	'
Schedule of Consolidated Investments In Real Property	'
	Real Property		Land			Building and Improvements			Intangible Lease Assets			Total Investment Amount			Intangible Lease Liabilities		Net Investment Amount
	As of December 31, 2013:
	Office	$	232,117		$	769,654		$	365,314		$	1,367,085		$	-15,861	$	1,351,224
	Industrial (1)		51,678			359,800			66,877			478,355			-46,626		431,729
	Retail		227,218			420,070			77,752			725,040			-51,059		673,981
	Total gross book value		511,013			1,549,524			509,943			2,570,480			-113,546		2,456,934
	Accumulated depreciation/amortization		-			-207,966			-294,881			-502,847			35,997		-466,850
	Total net book value	$	511,013		$	1,341,558		$	215,062		$	2,067,633		$	-77,549	$	1,990,084
	As of December 31, 2012:
	Office	$	218,738		$	833,226		$	457,754		$	1,509,718		$	-25,121	$	1,484,597
	Industrial		71,725			436,340			79,610			587,675			-48,432		539,243
	Retail		227,218			416,971			77,968			722,157			-51,059		671,098
	Total gross book value		517,681			1,686,537			615,332			2,819,550			-124,612		2,694,938
	Accumulated depreciation/amortization		-			-189,740			-293,042			-482,782			36,281		-446,501
	Total net book value	$	517,681		$	1,496,797		$	322,290		$	2,336,768		$	-88,331	$	2,248,437
	(1)Includes $21.1 million in land, $157.7 million in building and improvements, $14.9 million in intangible lease assets, and $5.6 million in intangible lease liabilities, before accumulated depreciation on assets of $50.6 million and accumulated amortization of intangible lease liabilities of $2.5 million, related to 12 industrial properties classified as held for sale in the accompanying balance sheet as of December 31, 2013.
Schedule of Disposed Properties	'
	Type of Property	Market	DPF Ownership	Square Feet	Disposition Date	Gain (Loss)
	2013 Dispositions:
	Office	Dallas, TX	100.00%	62	13-Jan-13	$	1,217
	Industrial Portfolio	Various (1)	96.40%	1,918	10-May-13		-311
	Office (2)	Dallas, TX	100.00%	1,509	31-May-13		15,462
	Office	Boston, MA	100.00%	132	6-Jun-13		6,734
	Office	Denver, CO	100.00%	257	31-Jul-13		35,371
	Office	Denver, CO	100.00%	133	13-Sep-13		10,233
	Office	Chicago, IL	100.00%	100	15-Oct-13		5,580
	Total			4,111		$	74,286
	2012 Dispositions:
	Retail	Boston, MA	100.00%	19	27-Feb-12	$	-328
	Office	Silicon Valley, CA	90.00%	427	31-Jul-12		19,584
	Industrial	Louisville, KY	90.00%	164	5-Jun-12		1,857
	Total			610		$	21,113
	2011 Dispositions:
	Office	Silicon Valley, CA	97.50%	52	23-Sep-11	$	1,187
	Industrial	Cincinnati, OH	95.60%	604	17-Oct-11		-1,046
	Office	Silicon Valley, CA	100.00%	187	18-Nov-11		8,305
	Industrial	Kansas City, MO	88.60%	180	21-Nov-11		70
	Retail	Boston, MA	100.00%	46	21-Dec-11		2,266
	Total			1,069		$	10,782
	Assets held for sale
	Industrial Portfolio	Various (3)	92.50%	3,387	22-Jan-14
	Total			3,387
	(1)Industrial portfolio included seven properties located in the following markets: Philadelphia, PA, Sacramento, CA, Central Pennsylvania, Charlotte, NC, Atlanta, GA, and Chicago, IL.
	(2)During the year ended December 31, 2012, we became the 100% owner of the titleholder of a 1.5 million square foot office property in the Dallas, TX market (“Comerica Bank Tower”), as the result of our foreclosure of a non-performing mezzanine loan for which such ownership interest had served as collateral. Comerica Bank Tower was subject to a mortgage note with a principal balance of $179.8 million as of the acquisition date bearing interest at 5.8%, which matures in January 2017. On September 10, 2012, we were notified that a receiver (the “Receiver”) had been appointed for the Comerica Bank Tower. As of March 31, 2013, the unpaid principal balance of this mortgage note was $177.4 million. On May 31, 2013, Comerica Bank Tower was sold by the Receiver pursuant to court order to a purchaser unaffiliated with us. Because of the outstanding principal balance of the mortgage note, we did not receive any proceeds from the sale of Comerica Bank Tower.
	(3)Industrial portfolio included 12 properties located in the following markets: Atlanta, GA, Central Pennsylvania, Cincinnati, OH, Columbus, OH, Dallas, TX, Indianapolis, IN, and Minneapolis/St. Paul, MN.
Schedule of Amounts Recorded as Discontinued Operations	'
			For the Year Ended December 31,
			2013			2012			2011 (1)
	Revenues		$	39,023		$	61,461		$	53,603
	Rental expense			-14,020			-21,731			-12,709
	Real estate depreciation and amortization expense			-21,017			-37,989			-33,483
	Impairment of real estate property			-			-5,700			-23,500
	Interest expense			-12,662			-23,771			-18,429
	Other expenses			-56			-793			-625
	Income (loss) from discontinued operations, net of taxes			-8,732			-28,523			-35,143
	Gain (Loss) on disposition, net of taxes			74,286			21,113			13,633
	Discontinued operations, net of taxes		$	65,554		$	-7,410		$	-21,510
	(1)Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.
Schedule of Adjustments to Rental Revenue Related to Amortization of Above-Market Lease Assets, Below-Market Lease Liabilities, and for Straight-Line Rental Adjustments	'
			For the Year Ended December 31,
			2013			2012			2011
	Above-market lease assets		$	-7,293		$	-8,050		$	-8,393
	Below-market lease liabilities			7,537			9,567			9,756
	Net increase to rental revenue		$	244		$	1,517		$	1,363
	Intangible lease asset amortization		$	-62,325		$	-80,739		$	-77,452
Future Minimum Rental Receivable Under Non Cancelable Operating and Ground Leases	'
	For the Years Ended December 31,		Future Minimum Rentals
	2014		$	192,551
	2015			181,583
	2016			174,497
	2017			129,026
	2018			95,009
	Thereafter			283,661
	Total		$	1,056,327
Schedule of Top Five Tenants as Percentage of Consolidated Annual Base Rent and Square Feet	'
	Tenant		Locations		Industry	Annualized			% of Total Annualized Rental Revenue		Square		% of Total Portfolio Square Feet
						Rental					Feet
						Revenue (1)
	Charles Schwab & Co, Inc		1		Securities, Commodities, Fin. Inv./Rel. Activites	$	22,761		11.5%		594		4.2%
	Northrop Grumman		2		Professional, Scientific and Technical Services		17,532		8.9%		699		4.9%
	Sybase		1		Publishing Information (except Internet)		17,283		8.8%		405		2.8%
	Stop & Shop		15		Food and Beverage Stores		13,828		7.0%		872		6.1%
	CEVA Freight/Logistics		3		Truck Transportation		5,198		2.6%		790		5.5%
	Total		22			$	76,602		38.8%		3,360		23.5%
	(1)Annualized base rent represents the annualized monthly base rent of executed leases as of December 31, 2013.

Debt_Related_Investments_Table

Debt Related Investments (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Related Investments [Abstract]	'
Details of Debt Related Income	'
			For the Year Ended December 31,								Weighted Average Yield as of
	Investment Type		2013			2012		2011			December 31, 2013 (1)
	Mortgage notes (2)		$	8,726		$	8,732	$	6,890		5.70%
	B-notes			51			433		2,371		0.00%
	Mezzanine debt			1,672			244		1,846		16.70%
	Total		$	10,449		$	9,409	$	11,107		7.10%
	(1)Weighted average yield is calculated on an unlevered basis using the amount invested, current interest rates and accretion of premiums or discounts realized upon the initial investment for each investment type as of December 31, 2013. Yields for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of December 31, 2013 for purposes of this table. As of December 31, 2013, we had one debt related investment with a net investment amount of $25.0 million that bears interest at a floating rate indexed to LIBOR. All of our remaining debt related investments bear interest at fixed rates. We have assumed a yield of zero on the one debt related investment for which we have recognized a full allowance for loss as of December 31, 2013.
	(2)We had four and three debt related investments repaid in full during the years ended December 31, 2013 and 2012, respectively. Amounts recorded include an early repayment fee received and accelerated amortization of origination fees offset by accelerated amortization of deferred due diligence costs related to these repayments.
Debt Investment Activity	'
			Year Ended December 31,
			2013			2012
	Investment in debt related investments:
	Balance at January 1,		$	187,321		$	92,247
	Investments			12,323			121,842
	Principal repayments			-75,702			-25,093
	Amortization of deferred fees, costs, and discounts/premiums			-7			-1,675
	Provision for loan loss			-			-
	Balance at December 31,		$	123,935		$	187,321
Summary of Debt Related Investments	'
	Description		Region		Interest Rate Fixed or Variable		Interest Rate as of	Maturity Date (2)		Face Amount of Debt (3)		Amount of Debt Related Investments
							December 31, 2013 (1)
	Mortgage note		Pacific		Fixed		7.50%	10/8/14		$	17,000	$	17,098
	Mortgage note		West North Central		Fixed		7.80%	4/1/15			9,074		9,389
	Mortgage note		Mountain		Fixed		7.70%	4/1/15			9,083		9,175
	Mortgage note		Southeast		Fixed		6.30%	2/1/18			9,213		9,570
	Mortgage note		East North Central		Fixed		6.10%	4/1/18			7,746		7,354
	Mortgage note		Northeast		Fixed		6.20%	11/1/17			3,841		3,903
	Mortgage note		Mountain		Fixed		6.20%	9/1/16			2,966		3,011
	Mortgage note		Southeast		Fixed		7.00%	3/1/19			9,170		9,331
	Mortgage note		West North Central		Fixed		6.00%	7/1/18			6,930		6,887
	Mortgage note		Southwest		Fixed		5.80%	6/1/14			3,675		3,677
	Mortgage note		Mountain		Fixed		5.20%	3/1/21			3,450		3,429
	Mortgage note		Northeast		Variable		5.20%	6/7/15			25,000		25,211
	B-note (4)		Pacific		Fixed		0.00%	1/1/11			3,000		-
	Mezzanine debt		Mid-Atlantic		Fixed		17.00%	7/1/16			15,665		15,900
	Total/weighted average						7.60%			$	125,813	$	123,935
		-1		Rates for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of December 31, 2013 for purposes of this table.
		-2		Reflects the initial maturity of the investment or any exercised options to extend and does not consider any future options to extend that are at the discretion of the borrower.
	Reflects the principal amount of the debt investment outstanding, which is net of principal repayments.
		-4		We have recorded a provision for loan loss of $3.0 million related to this B-note investment as of December 31, 2013, and we have assumed a yield of 0%.
Reconciliation of Allowance for Loan Loss on Debt Related Investments	'
				Allowance for Loan Loss
	Beginning balance as of December 31, 2012:			$	18,000
		Direct write offs			-15,000
		Ending balance as of December 31, 2013:		$	3,000
Recorded Investment in Debt Related Investments before Allowance for Loan Loss, and Related Allowance for Loan Loss	'
			Debt Investments Individually Evaluated for Impairment as of December 31,
			2013			2012
	Debt investments		$	126,935		$	205,321
	Less: Allowance for loan losses			-3,000			-18,000
	Total		$	123,935		$	187,321
Gross Recorded Investment in Impaired Debt Related Investments, Related Allowance For Loan Loss, and Total Amount Of Impaired Loans	'
	As of:		Recorded Investment			Related Allowance		Amount of Impaired Loans With No Allowance Recorded
	31-Dec-13		$	3,000		$	-3,000	$	-
	31-Dec-12		$	30,135		$	-18,000	$	12,135
Average Recorded Net Investment in Impaired Debt Related Investments and Related Interest Income Recorded	'
	For the Year Ended December 31,		Average Recorded Investment			Interest Income Recognized
	2013		$	6,067		$	51
	2012			12,930			433
	2011			25,314			3,060

Debt_Obligations_Tables

Debt Obligations (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Obligations [Abstract]	'
Schedule of Borrowings	'
		Weighted Average Stated Interest Rate as of December 31,				Outstanding Balance as of December 31, (1)							Gross Investment Amount Securing Borrowings as of December 31, (2)
		2013		2012		2013			2012			2013			2012
	Fixed-rate mortgages (3)	5.80%		5.80%		$	969,622		$	1,160,042		$	1,898,946		$	2,061,757
	Floating-rate mortgages (4)	3.90%		3.50%			8,580			23,701			15,571			42,609
	Total mortgage notes	5.80%		5.70%			978,202			1,183,743			1,914,517			2,104,366
	Repurchase facilities (5)	2.80%		3.00%			45,270			135,709			65,726			198,389
	Total other secured borrowings	2.80%		3.00%			45,270			135,709			65,726			198,389
	Total secured borrowings	5.60%		5.40%			1,023,472			1,319,452			1,980,243			2,302,755
	Line of credit	1.90%		2.20%			30,000			30,000			N/A			N/A
	Term loan (6)	2.20%		2.20%			270,000			270,000			N/A			N/A
	Total unsecured borrowings	2.20%		2.20%			300,000			300,000			N/A			N/A
	Total borrowings	4.90%		4.80%		$	1,323,472		$	1,619,452		$	1,980,243		$	2,302,755
	(1)Amounts presented are net of (i) fair value adjustment to mortgages carried at fair value of $0 and $55.0 million as of December 31, 2013 and 2012, respectively, (ii) unamortized premiums (discounts) to the face value of our outstanding fixed-rate mortgages of $2.7 million and ($2.7) million as of December 31, 2013 and 2012, respectively, and (iii) GAAP principal amortization related to troubled debt restructurings of $1.5 million and $718,000 as of December 31, 2013 and 2012, respectively.
	(2)“Gross Investment Amount” as used here and throughout this document represents the allocated gross basis of real property and debt related investments, after certain adjustments. Gross Investment Amount for real property (i) includes the effect of intangible lease liabilities, (ii) excludes accumulated depreciation and amortization, and (iii) includes the impact of impairments. Amounts reported for debt related investments represent our net accounting basis of the debt investments, which includes (i) unpaid principal balances, (ii) unamortized discounts, premiums, and deferred charges, and (iii) allowances for loan loss.
	(3)Fixed-rate mortgages presented include outstanding balances included within liabilities related to assets held for sale as of December 31, 2013 of approximately $80.4 million at a weighted average interest rate of 6.1% secured by gross investments of approximately $170.3 million.
	(4)As of December 31, 2013, our floating-rate mortgage note was subject to an interest rate spread of 3.75% over one-month LIBOR. As of December 31, 2012, our floating-rate mortgage notes were subject to interest rates at spreads ranging from 2.9% to 3.75% over one-month LIBOR.
	(5)As of December 31, 2013, borrowings under our repurchase facility were subject to interest at a floating rate of 2.25% over one-month LIBOR. However, we had effectively fixed the interest rate of the borrowings using an interest rate swap, resulting in a fixed interest rate of 2.84% for the term of the borrowings (provided that our borrowing balance does not exceed our derivative instrument notional during that term). As of December 31, 2012, borrowings under our repurchase facilities were subject to interest at floating rates at spreads ranging from 2.25% to 3% over one-month LIBOR. As of December 31, 2012, we had effectively fixed the interest rate of approximately $79.1 million of the total of $135.7 million in borrowings using interest rate swaps at 3.14%, resulting in a weighted average interest rate on the total repurchase facility of 3.04%.
	(6)As of December 31, 2013, borrowings under our term loan were subject to interest at a floating rate of 1.70% over one-month LIBOR. However, we had effectively fixed the interest rate for $200.0 million of the total of $270.0 million in borrowings using interest rate swaps at 2.34%, resulting in a weighted average interest rate on the total term loan of 2.21%. As of December 31, 2012, borrowings of $270.0 million under our term loan were subject to interest at a floating rate of 1.95% over one-month LIBOR, resulting in a weighted average interest rate on the total term loan of 2.16%.
Schedule of Borrowings Reflects Contractual Debt Maturities	'
			As of December 31, 2013
			Mortgage Notes and Other Secured Borrowings					Unsecured Borrowings					Total
	Year Ending December 31,		Number of Borrowings Maturing		Outstanding Balance (1)(2)(3)			Number of Borrowings Maturing		Outstanding Balance (4)			Outstanding Balance (5)(6)
	2014		4		$	145,190		0		$	-		$	145,190
	2015		5			127,206		0			-			127,206
	2016		13			347,496		1			30,000			377,496
	2017		7			223,371		0			-			223,371
	2018		0			4,999		1			270,000			274,999
	2019		0			5,292		0			-			5,292
	2020		1			157,944		0			-			157,944
	2021		0			1,707		0			-			1,707
	2022		1			1,663		0			-			1,663
	2023		0			978		0			-			978
	Thereafter		2			6,431		0			-			6,431
	Total		33		$	1,022,277		2		$	300,000		$	1,322,277
	(1)Three of our mortgage notes and one of our repurchase facilities with an aggregate outstanding principal balance as of December 31, 2013 of approximately $132.5 million have initial maturities before December 31, 2014.  One of these mortgage notes with an outstanding balance of $38.9 million, and the repurchase facility with an outstanding balance of $45.3 million have extension options beyond December 31, 2014. Borrowings that are subject to extension options are also subject to certain lender covenants and restrictions that we must meet to extend the initial maturity date. We currently believe that we will qualify for these extension options. However, we cannot guarantee that we will meet the requirements to extend the notes upon initial maturity. In the event that we do not qualify to extend the notes, we expect to repay them with proceeds from new borrowings or available proceeds from our revolving credit facility.
	(2)Three of our mortgage notes with outstanding balances of $39.7 million, $30.9 million, and $9.8 million, maturing in 2014, 2015, and 2016, respectively, were classified within liabilities associated with assets held for sale in the accompanying balance sheet as of December 31, 2013. These mortgages were assumed by the purchaser of the related portfolio of real properties subsequent to December 31, 2013.
	(3)Secured borrowings presented include (i) mortgage note borrowings of approximately $977.0 million with maturities ranging from 2014 to 2029, and (ii) borrowings under our repurchase facility of approximately $45.3 million, which matures in 2014 and is subject to three one-year extension options.
	(4)Unsecured borrowings presented include (i) borrowings under our revolving credit facility of $30.0 million, which matures in 2016, subject to two one-year extension options, and (ii) term loan borrowings of $270.0 million which mature in 2018.
	(5)Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not include the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.
	(6)As of December 31, 2013, our mortgage notes and secured borrowings are secured by interests in real properties and debt investments totaling approximately $2.0 billion.

Hedging_Activities_Tables

Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2013
Hedging Activities [Abstract]	'
Reconciliation of Accumulated Other Comprehensive Loss	'
				Gains and Losses on Cash Flow Hedges			Unrealized Gains and Losses on Available-For-Sale Securities			Accumulated Other Comprehensive Income
	Beginning balance as of December 31, 2012:			$	-14,710		$	-1,486		$	-16,196
		Other comprehensive income:
		Amortization of OCI into interest expense (net of tax benefit of $0)			2,726			-			2,726
		Change in fair value recognized in OCI (net of tax benefit of $0)			352			-			352
		Amounts reclassified from accumulated other comprehensive income:
		Losses reclassified into loss on extinguishment of debt and financing commitments upon discontinuance of cash flow hedges (net of tax benefit of $0)			1,897			-			1,897
		Net current-period other comprehensive income			4,975			-			4,975
		Attribution of and other adjustments to OCI attributable to noncontrolling interests			-141			568			427
	Ending balance as of December 31, 2013			$	-9,876		$	-918		$	-10,794
Gross Fair Value of Derivative Financial Instruments as Well as Their Classification	'
			Asset Derivatives								Liability Derivatives
			Balance Sheet		As of December 31, 2013			As of December 31, 2012			Balance Sheet	As of December 31, 2013		As of December 31, 2012
			Location		Fair Value			Fair Value			Location	Fair Value		Fair Value
	Derivatives designated as hedging instruments under ASC Topic 815
	Interest rate contracts		Other assets, net (1)		$	748		$	-		Other liabilities (1)	$	-43	$	-403
	Total derivatives designated as hedging instruments under ASC Topic 815					748			-				-43		-403
	Derivatives not designated as hedging instruments under ASC Topic 815
	Interest rate contracts		Other assets, net (1)			-			-		Other liabilities (1)		-		-13
	Total derivatives not designated as hedging instruments under ASC Topic 815					-			-				-		-13
	Total derivatives				$	748		$	-			$	-43	$	-416
	(1)Although our derivative contracts are subject to master netting arrangements which serve as credit mitigants to both us and our counterparties under certain situations, we do not net our derivative fair values or any existing rights or obligations to cash collateral on the consolidated balance sheet.

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on Recurring Basis	'
		Level 1		Level 2		Level 3		Total
	As of December 31, 2013:
	Assets
	Real estate securities	$	-	$	-	$	461	$	461
	Derivative instruments		-		748		-		748
	Total assets	$	-	$	748	$	461	$	1,209
	Liabilities
	Derivative instruments	$	-	$	-43	$	-	$	-43
	Total liabilities	$	-	$	-43	$	-	$	-43
	As of December 31, 2012:
	Assets
	Real estate securities	$	-	$	-	$	461	$	461
	Total assets	$	-	$	-	$	461	$	461
	Liabilities
	Mortgage notes carried at fair value	$	-	$	-	$	-122,995	$	-122,995
	Derivative instruments	$	-	$	-416	$	-	$	-416
	Total liabilities	$	-	$	-416	$	-122,995	$	-123,411
Reconciliation of Fair Value Measurements Based on Significant Unobservable Inputs	'
		Mortgage Notes Carried at Fair Value		Real Estate Securities		Derivative Instruments
	Beginning balance as of December 31, 2012	$	-122,995	$	461	$	-416
	Total net gains (losses) included in:
	Net income (other income and expense)		-		-		-8
	Other comprehensive income (Unrealized change from cash flow hedging derivatives)		-		-		352
	Total change in fair value		-		-		344
	Settlements		122,995		-		777
	Transfers in and/or out of Level 3		-		-		-
	Ending balance as of  December 31, 2013	$	-	$	461	$	705

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value of Financial Instruments [Abstract]	'
Schedule of Carrying Amount and Fair Values of Other Financial Instruments	'
		As of December 31, 2013				As of December 31, 2012
			Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	Assets:
	Investments in real estate securities	$	461	$	461	$	461	$	461
	Fixed-rate debt related investments, net		98,724		101,012		108,482		110,796
	Floating-rate debt related investments, net		25,211		24,504		78,839		79,803
	Derivative instruments		748		748		-		-
	Liabilities:
	Fixed-rate mortgage notes carried at amortized cost	$	969,622	$	1,010,085	$	1,037,047	$	1,091,425
	Fixed-rate mortgage notes carried at fair value		-		-		122,995		122,995
	Floating-rate mortgage notes		8,580		8,582		23,701		23,738
	Floating-rate other secured borrowings		45,270		45,270		135,709		135,931
	Floating-rate unsecured borrowings		300,000		301,690		300,000		300,000
	Derivative liabilities		43		43		416		416

Noncontrolling_Interests_Table

Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2013
Noncontrolling Interests [Abstract]	'
Schedule of Noncontrolling Interest Balances	'
			OP Units:		Joint Venture Partner Interests:		Noncontrolling Interests
	Beginning balance as of December 31, 2012:		$	88,259	$	7,572	$	95,831
		Comprehensive Income and Loss
		Net income		4,010		-8		4,002
		Unrealized change from cash flow hedging derivatives		354		-		354
		Contributions, Distributions and Redemptions
		Contributions from noncontrolling interest holders		-		212		212
		Distributions to noncontrolling interest holders		-4,807		-639		-5,446
		Redemption and buyout of noncontrolling interests, net		-1,408		-1,639		-3,047
	Ending balance as of  December 31, 2013		$	86,408	$	5,498	$	91,906

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity [Abstract]	'
Information of Share Transactions	'
		Class E Common Stock					Class A Common Stock					Class W Common Stock					Class I Common Stock				Total Proceeds
		Shares		Amount (1)			Shares		Amount (1)			Shares		Amount (1)			Shares		Amount (1)		Shares	Amount (1)
	Balances, December 31, 2010	182,717		$	1,806,652		-		$	-		-		$	-		-		$	-	182,717	$	1,806,652
	Common stock:
	Issuance of common stock and OP Units:
	Distribution Reinvestment Plan	5,274			43,540		-			-		-			-		-			-	5,274		43,540
	Conversion of OP Units to common stock	118			978		-			-		-			-		-			-	118		978
	Redemptions of common stock	-5,778			-48,205		-			-		-			-		-			-	-5,778		-48,205
	Balances, December 31, 2011	182,331		$	1,802,965		-		$	-		-		$	-		-		$	-	182,331	$	1,802,965
	Issuance of common stock:
	Shares Sold	65			317		12			83		12			83		12			83	101		566
	Distribution Reinvestment Plan	4,610			34,449		-			-		-			-		-			-	4,610		34,449
	Conversion of OP Units to common stock	269			2,273		-			-		-			-		-			-	269		2,273
	Redemptions of common stock	-9,183			-64,808		-			-		-			-		-			-	-9,183		-64,808
	Balances, December 31, 2012	178,092		$	1,775,196		12		$	83		12		$	83		12		$	83	178,128	$	1,775,445
	Issuance of common stock:
	Shares Sold	-			-		205			1,451		197			1,354		4,301			29,333	4,703		32,138
	Distribution Reinvestment Plan	3,143			21,352		-			-		-			-		18			121	3,161		21,473
	Redemptions of common stock	-9,981			-68,402		-			-		-			-		-4			-30	-9,985		-68,432
	Balances, December 31, 2013	171,254		$	1,728,146		217		$	1,534		209		$	1,437		4,327		$	29,507	176,007	$	1,760,624
	(1)Dollar amounts presented in this table represent the gross amount of proceeds from the sale of common shares, or the amount paid to stockholders to redeem common shares, and do not include other costs and expenses accounted for within additional paid-in capital, such as selling commissions, dealer manager and distribution fees, offering and organizational costs, and other costs associated with our distribution reinvestment plans and share redemption programs.
Total Distributions Declared and Portion of Each Contribution Paid in Cash and Reinvested	'
			For the Year Ended December 31,
	Distributions:		2013			% of Total Distributions		2012			% of Total Distributions		2011			% of Total Distributions
	Paid in cash		$	41,123		66.0%		$	53,311		63.3%		$	62,575		59.2%
	Reinvested in shares			21,207		34.0%			30,948		36.7%			43,129		40.8%
	Total distributions		$	62,330		100.0%		$	84,259		100.0%		$	105,704		100.0%
Distributions Paid and/or Authorized	'
			Amount Declared per Share (1)
	Quarter		Class E Shares			Class A Shares			Class W Shares			Class I Shares			Weighted Average			Payment Date
	2012
	1st Quarter 2012		$	0.1250			N/A			N/A			N/A		$	0.1250		16-Apr-12
	2nd Quarter 2012		$	0.1250			N/A			N/A			N/A		$	0.1250		24-Jul-12
	3rd Quarter 2012		$	0.1250		$	0.0938		$	0.1012		$	0.1086		$	0.1250		16-Oct-12
	4th Quarter 2012		$	0.0875		$	0.0691		$	0.0775		$	0.0858		$	0.0875		16-Jan-13
	2013
	1st Quarter 2013		$	0.0875		$	0.0692		$	0.0775		$	0.0858		$	0.0875		16-Apr-13
	2nd Quarter 2013		$	0.0875		$	0.0689		$	0.0774		$	0.0858		$	0.0875		16-Jul-13
	3rd Quarter 2013		$	0.0875		$	0.0685		$	0.0771		$	0.0858		$	0.0875		16-Oct-13
	4th Quarter 2013		$	0.0875		$	0.0684		$	0.0771		$	0.0858		$	0.0874		16-Jan-14
	2014
	1st Quarter 2014 (2)		$	0.0875		$	0.0875		$	0.0875		$	0.0875		$	0.0875		April 16, 2014 (3)
	(1)Assumes ownership of share or unit for the entire quarter.
	(2)The distribution amount herein for the first quarter of 2014 does not reflect class-specific adjustments made to our Class A, Class W, and Class I shares, which have not yet been determined.
	(3)Expected payment date.
Schedule of Information Regarding Taxability of Distributions on Common Shares	'
			For the Year Ended December 31,
				2013					2012					2011
	Per Common Share		Per Share Amount			Percentage		Per Share Amount			Percentage		Per Share Amount			Percentage
	Ordinary income		$	0.11		40.98%		$	0.01		1.49%		$	0.19		32.53%
	Non-taxable return of capital			0.15		59.02%			0.45		98.51%			0.39		67.47%
	Total		$	0.26		100.00%		$	0.46		100.00%		$	0.58		100.00%

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Schedule of Fees and Other Amounts Earned by Advisor	'
		For the Year Ended December 31,
		2013		2012		2011
	Acquisition fees	$	-	$	1,534	$	218
	Advisory fees		15,120		17,659		20,854
	Development management fee		223		133		-
	Other reimbursements		6,234		3,253		1,940
	Asset management fees related to the disposition of real properties		2,639		101		1,599
	Dealer manager and distribution fees		1,415		-		-
	Total	$	25,631	$	22,680	$	24,611

Net_Income_Loss_Per_Common_Sha1

Net Income (Loss) Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2013
Net Income (Loss) Per Common Share [Abstract]	'
Details of Numerator and Denominator Used to Calculate Diluted Net Loss Per Common Share	'
		For the Year Ended December 31,
	Numerator	2013		2012		2011
	Loss from continuing operations	$	-9,084	$	-14,961	$	-43,056
	Loss from continuing operations attributable to noncontrolling interests		558		1,081		2,997
	Loss from continuing operations attributable to common stockholders		-8,526		-13,880		-40,059
	Dilutive noncontrolling interests share of loss from continuing operations		-652		-1,160		-2,959
	Numerator for diluted earnings per share – adjusted loss from continuing operations		-9,178		-15,040		-43,018
	Income (loss) from discontinued operations		65,554		-7,410		-21,510
	(Income) loss from discontinued operations attributable to noncontrolling interests		-4,560		-971		3,889
	Income (loss) from discontinued operations attributable to common stockholders		60,994		-8,381		-17,621
	Dilutive noncontrolling interests share of income (loss) from discontinued operations		4,662		-701		-1,301
	Numerator for diluted earnings per share – adjusted income (loss) from discontinued operations	$	65,656	$	-9,082	$	-18,922
	Denominator
	Weighted average shares outstanding-basic		178,196		181,982		183,813
	Incremental weighted average shares effect of conversion of OP units		13,736		15,262		13,564
	Weighted average shares outstanding-diluted		191,932		197,244		197,377
	INCOME (LOSS) PER COMMON SHARE-BASIC AND DILUTED
	Net loss from continuing operations	$	-0.05	$	-0.08	$	-0.22
	Net income (loss) from discontinued operations		0.34		-0.04		-0.09
	Net income (loss)	$	0.29	$	-0.12	$	-0.31

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Information [Abstract]	'
Revenue and Components of Net Operating Income	'
		For the Year Ended December 31,
		Revenues							NOI
		2013		2012			2011		2013		2012		2011
	Real property (1)
	Office	$	123,838	$	122,264		$	124,438	$	95,618	$	95,625	$	97,551
	Industrial (2)		26,108		26,715			26,305		23,893		24,782		24,416
	Retail		57,382		57,937			57,007		44,145		45,974		43,985
	Debt related investments		10,449		9,409			11,107		10,449		9,409		11,107
	Total	$	217,777	$	216,325		$	218,857	$	174,105	$	175,790	$	177,059
	(1)Excludes results of operations of real properties categorized as discontinued operations.
	(2)Amounts reported for our industrial segment for the years ended December 31, 2013, 2012 and 2011 include revenue of approximately $13.0 million, $13.7 million, and $13.6 million, respectively, and NOI of approximately $11.6 million, $12.5 million, and $12.4 million, respectively, relating to four properties that we reclassified from our office segment into our industrial segment during 2013.
Reconciliation of Net Operating Income to Reported Net Income (Loss)	'
		For the Year Ended December 31,
		2013		2012			2011
	Net operating income	$	174,105	$	175,790	$ -	$	177,059
	Interest and other income (expense)		-153		807			2,394
	Real estate depreciation and amortization expense		-87,174		-91,127			-93,407
	General and administrative expenses		-9,973		-7,229			-6,826
	Advisory fees, related party		-15,120		-17,659			-20,854
	Acquisition-related expenses		-337		-325			-610
	Interest expense		-65,325		-69,844			-74,406
	Impairment of real estate property		-2,600		-			-
	Loss on extinguishment of debt and financing commitments		-2,507		-5,374			-
	Other-than-temporary impairment on securities		-		-			-3,369
	Provision for loss on debt related investments		-		-			-23,037
	Discontinued operations, net of taxes		65,554		-7,410			-21,510
	Net (income) loss attributable to noncontrolling interests		-4,002		110			6,886
	Net income (loss) attributable to common stockholders	$	52,468	$	-22,261		$	-57,680
Summary of Total Assets by Business Segment	'
		As of December 31,
		2013		2012
	Segment assets:
	Net investments in real property
	Office	$	1,092,351	$	1,245,346
	Industrial (1)		229,786		475,525
	Retail		602,505		615,897
	Debt related investments, net		123,935		187,321
	Total segment assets, net		2,048,577		2,524,089
	Non-segment assets:
	Cash and cash equivalents		24,778		36,872
	Other non-segment assets (2)		85,878		98,293
	Assets held for sale		146,176		-
	Total assets	$	2,305,409	$	2,659,254
	(1)Amounts reported for our industrial segment as of December 31, 2013 and December 31, 2012 include net investments in real property of approximately $117.9 million and $125.0 million, respectively, relating to properties that we had previously classified within our office segment.
	(2)Other non-segment assets primarily consist of corporate assets including restricted cash and receivables, including straight-line rent receivable.

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Data (Unaudited) [Abstract]	'
Quarterly Financial Data	'
										For the
		For the Quarter Ended								Year Ended
		March 31,		June 30,		September 30,		December 31,		December 31,
		2013		2013		2013		2013		2013
	Rental revenue	$	50,636	$	51,199	$	52,113	$	53,380	$	207,328
	Debt related income		2,735		2,615		2,309		2,790		10,449
	Total revenue		53,371		53,814		54,422		56,170		217,777
	Total operating expenses		-38,199		-37,512		-38,180		-44,985		-158,876
	Other income (expenses)		-16,923		-16,599		-16,314		-18,149		-67,985
	Loss from continuing operations		-1,751		-297		-72		-6,964		-9,084
	Discontinued operations, net of taxes	$	-4,115	$	18,754	$	45,403	$	5,512		65,554
	Net income (loss)		-5,866		18,457		45,331		-1,452		56,470
	Net (income) loss attributable to noncontrolling interests		499		-1,329		-3,257		85		-4,002
	NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$	-5,367	$	17,128	$	42,074	$	-1,367	$	52,468
	Net loss per basic and diluted common share
	Continuing operations	$	-0.01	$	0	$	0	$	-0.04	$	-0.05
	Discontinued operations	$	-0.02	$	0.10	$	0.24	$	0.02	$	0.34
	NET LOSS PER BASIC AND DILUTED COMMON SHARE	$	-0.03	$	0.10	$	0.24	$	-0.02	$	0.29
										For the
		For the Quarter Ended								Year Ended
		March 31,		June 30,		September 30,		December 31,		December 31,
		2012		2012		2012		2012		2012
	Rental revenue	$	51,953	$	51,282	$	51,590	$	52,091	$	206,916
	Debt related income		1,884		1,759		3,019		2,747		9,409
	Total revenue		53,837		53,041		54,609		54,838		216,325
	Total operating expenses		-40,388		-38,900		-38,812		-38,775		-156,875
	Other income (expenses)		-18,507		-19,817		-17,398		-18,689		-74,411
	Loss from continuing operations		-5,058		-5,676		-1,601		-2,626		-14,961
	Discontinued operations, net of taxes		-4,281	$	-3,896	$	13,545		-12,778		-7,410
	Net income (loss)		-9,339		-9,572		11,944		-15,404		-22,371
	Net (income) loss attributable to noncontrolling interests		849		701		-2,680		1,240		110
	NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$	-8,490	$	-8,871	$	9,264	$	-14,164	$	-22,261
	Net loss per basic and diluted common share
	Continuing operations	$	-0.03	$	-0.03	$	-0.01	$	-0.01	$	-0.08
	Discontinued operations	$	-0.02	$	-0.02	$	0.06	$	-0.06	$	-0.04
	NET LOSS PER BASIC AND DILUTED COMMON SHARE	$	-0.05	$	-0.05	$	0.05	$	-0.07	$	-0.12

Organization_Details

Organization (Details) (USD $)	12 Months Ended
Share data in Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Jul. 12, 2012
				NAV Offering [Member]	NAV Offering [Member]
Organization [Line Items]	'	'	'	'	'
Percentage of proceeds received from public offerings of common stock contributed to our Operating Partnership	100.00%	'	'	'	'
Maximum NAV share value total	'	'	'	$2,967,700,000	$3,000,000,000
Maximum NAV share value primary offering	'	'	'	'	2,250,000,000
Maximum share value, DRIP	'	'	'	749,900,000	750,000,000
Gross proceeds from sale of shares in the Offering	'	'	'	32,300,000	'
Shares issued	'	'	'	4,700	'
Proceeds from issuance, DRIP	$21,473,000	$34,491,000	$45,732,000	$121,000	'

Recovered_Sheet2

Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	property	property
Significant Accounting Policies [Line Items]	'	'	'
Number of properties classified as held and used	70	'	'
Number of properties classified as held for sale	12	0	'
Investment in real estate securities	$500,000	$500,000	'
Other-than-temporary impairment on securities	0	0	3,369,000
Other- than-temporary impairment related to investment in debt securities	140,100,000	140,100,000	'
Allowances on receivables	251,000	510,000	'
Accumulated other comprehensive income (loss) related to derivatives	8,800,000	'	'
Accumulated other comprehensive income (loss) related to real estate securities	411,000	'	'
Noncontrolling Interests [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Accumulated other comprehensive income (loss) related to derivatives	1,000,000	'	'
Accumulated other comprehensive income (loss) related to real estate securities	$1,300,000	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Amortization Expense for Intangible Lease Assets and Adjustments to Rental Revenue for Above-Market Lease Assets and Below-Market Lease Liabilities) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Above Market Lease Assets [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Net rental revenue adjustment	($7,293)	($8,050)	($8,393)
Below Market Lease Liabilities [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Net rental revenue adjustment	7,537	9,567	9,756
Leases, Acquired-in-Place, Market Adjustment [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Net rental revenue adjustment	244	1,517	1,363
Leases, Acquired-in-Place [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Intangible lease asset amortization	($62,325)	($80,739)	($77,452)

Recovered_Sheet3

Summary Of Significant Accounting Policies (Depreciation and Amortization Computed on Straight-Line Basis over Estimated Useful Lives) (Details)	12 Months Ended
	Dec. 31, 2013
Land [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Not depreciated
Building [Member]	'
Property, Plant and Equipment [Line Items]	'
Depreciable Life	'40 years
Building and Land Improvements [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Depreciable Life	'5 years
Building and Land Improvements [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Depreciable Life	'20 years
Tenant Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Lesser of useful life or lease term
Leasing Commissions [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Over lease term
Intangible Lease Assets [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Over lease term
Above Market Lease Assets [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Over lease term
Below Market Lease Liabilities [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives	'Over lease term, including below-market fixed-rate renewal options

Summary_Of_Significant_Account3

Summary Of Significant Accounting Policies (Expected Amortization During Next Five Years and Thereafter Related to Acquired Above-Market Lease Assets, Below-Market Lease Liabilities and Acquired In-Place Lease Intangibles) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Below Market Lease Liabilities [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
2014	$7,125
2015	5,895
2016	5,201
2017	4,975
2018	4,920
Thereafter	49,433
Total	77,549
Above Market Lease Assets [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
2014	-6,716
2015	-6,315
2016	-6,248
2017	-3,711
2018	-1,418
Thereafter	-1,897
Total	-26,305
Leases, Acquired-in-Place, Market Adjustment [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
2014	409
2015	-420
2016	-1,047
2017	1,264
2018	3,502
Thereafter	47,536
Total	51,244
Leases, Acquired-in-Place [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
2014	47,544
2015	40,203
2016	37,527
2017	22,382
2018	12,099
Thereafter	29,002
Total	$188,757

Summary_Of_Significant_Account4

Summary Of Significant Accounting Policies (Straight-Line Rental Adjustments and Tenant Recovery Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract]	'	'	'
Straight-line rent adjustments	$8,864	$8,107	$9,902
Tenant recovery income	$33,029	$33,585	$33,445

Investments_in_Real_Property_N

Investments in Real Property (Narrative) (Details) (USD $)

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Nov. 07, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

property

property

property

Office Property; San Francisco, CA [Member]

Office Property; San Francisco, CA [Member]

California [Member]

New Jersey [Member]

Massachusetts [Member]

Texas [Member]

Comerica Bank Tower [Member]

Industrial [Member]

Industrial [Member]

Office [Member]

Office [Member]

Charles Schwab and Company, Inc. [Member]

Charles Schwab and Company, Inc. [Member]

sqft

sqft

sqft

sqft

property

sqft

Continuing Operations [Member]

Real Estate Properties [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of industrial properties classified as held for sale

12

0

'

'

'

'

'

'

'

'

12

'

'

'

'

'

Ownership interest in property

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

Square feet of office property acquired

'

'

'

269,000

'

'

'

'

'

'

'

'

'

'

'

'

Unpaid principal balance

$57,900,000

'

'

$57,900,000

$57,800,000

'

'

'

'

$177,300,000

'

'

'

'

'

'

Interest bearing on mortgage note

6.01%

5.80%

'

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maturity period

'

'

'

'

'June 2016

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value of assets and liabilities

'

'

'

'

109,700,000

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Land

'

'

'

'

32,600,000

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Buildings

'

'

'

'

67,800,000

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill

'

'

'

'

15,900,000

'

'

'

'

'

'

'

'

'

'

'

Intangible lease liabilities, net

74,413,000

88,331,000

'

'

1,500,000

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Purchase Price Allocation, Other Liabilities

'

'

'

'

3,100,000

'

'

'

'

'

'

'

'

'

'

'

Acquired intangible asset, weighted average useful life

'

'

'

'

'4 years 4 months 24 days

'

'

'

'

'

'

'

'

'

'

'

Acquired intangible Liability, weighted average useful life

'

'

'

'

'2 years 3 months 18 days

'

'

'

'

'

'

'

'

'

'

'

Assumed mortgage

57,897,000

124,800,000

'

61,700,000

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate revenue

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net operating income

857,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of impaired properties

1

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairment charges

2,600,000

5,700,000

23,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of properties sold

12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Rentable square feet

3,360,000

'

'

'

'

'

'

'

'

'

'

'

'

'

594,000

'

Proceeds from disposition of real property

133,485,000

7,081,000

81,651,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (loss) on disposition, net of taxes

74,286,000

21,113,000

13,633,000

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

Square feet of office property sold

4,111,000

610,000

1,069,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Investments in real property

1,924,642,000

[2]

2,336,768,000

[2]

'

'

'

'

'

'

'

'

229,786,000

[3]

475,525,000

[3]

1,092,351,000

1,245,346,000

'

'

Restricted cash

25,550,000

32,968,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding loan balance

1,322,277,000

[4],[5]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Rental revenue

$76,602,000

[6]

'

'

'

'

'

'

'

'

'

'

'

'

'

$22,761,000

[6]

$25,500,000

Concentration percentage

38.80%

'

'

'

'

20.00%

16.00%

16.00%

12.00%

'

'

'

'

'

11.50%

11.70%

[1]

Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

[2]

Includes approximately $82.4 million and $520.3 million, after accumulated depreciation and amortization, in consolidated real property variable interest entity investments as of December 31, 2013 and 2012, respectively. (2)Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.

[3]

Amounts reported for our industrial segment as of December 31, 2013 and December 31, 2012 include net investments in real property of approximately $117.9 million and $125.0 million, respectively, relating to properties that we had previously classified within our office segment.

[4]

Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.

[5]

Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.(6)As of December 31, 2013, our mortgage notes and secured borrowings are secured by interests in real properties and debt investments totaling approximately $2.0 billion.

[6]

Annualized base rent represents the annualized monthly base rent of executed leases as of DecemberB 31, 2013.

Investments_In_Real_Property_C

Investments In Real Property (Consolidated Investments In Real Property) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
	property		property
Schedule of Investments [Line Items]	'		'
Investment in real property, Gross book value	$2,570,480,000		$2,819,550,000
Intangible lease liabilities, Gross book value	-113,546,000		-124,612,000
Real estate investments, Gross book value	2,456,934,000		2,694,938,000
Accumulated depreciation and amortization	-502,847,000		-482,782,000
Intangible lease liabilities, accumulated amortization	35,997,000		36,281,000
Accumulated depreciation/amortization	-466,850,000		-446,501,000
Investment in real property	2,067,633,000		2,336,768,000
Intangible lease liabilities, Net book value	-77,549,000		-88,331,000
Real estate investments, Net book value	1,990,084,000		2,248,437,000
Number of industrial properties classified as held for sale	12		0
Land [Member]	'		'
Schedule of Investments [Line Items]	'		'
Land	511,013,000		517,681,000
Building and Building Improvements [Member]	'		'
Schedule of Investments [Line Items]	'		'
Building and Improvements	1,549,524,000		1,686,537,000
Accumulated depreciation and amortization	-207,966,000		-189,740,000
Real estate investments, Net book value	1,341,558,000		1,496,797,000
Intangible Lease Assets [Member]	'		'
Schedule of Investments [Line Items]	'		'
Intangible Lease Assets	509,943,000		615,332,000
Accumulated depreciation and amortization	-294,881,000		-293,042,000
Intangible lease liabilities, Net book value	215,062,000		322,290,000
Office [Member]	'		'
Schedule of Investments [Line Items]	'		'
Investment in real property, Gross book value	1,367,085,000		1,509,718,000
Intangible lease liabilities, Net book value	-15,861,000		-25,121,000
Real estate investments, Net book value	1,351,224,000		1,484,597,000
Office [Member] | Land [Member]	'		'
Schedule of Investments [Line Items]	'		'
Land	232,117,000		218,738,000
Office [Member] | Building and Building Improvements [Member]	'		'
Schedule of Investments [Line Items]	'		'
Building and Improvements	769,654,000		833,226,000
Office [Member] | Intangible Lease Assets [Member]	'		'
Schedule of Investments [Line Items]	'		'
Intangible Lease Assets	365,314,000		457,754,000
Industrial [Member]	'		'
Schedule of Investments [Line Items]	'		'
Investment in real property, Gross book value	478,355,000	[1]	587,675,000
Intangible lease liabilities, Net book value	-46,626,000	[1]	-48,432,000
Real estate investments, Net book value	431,729,000	[1]	539,243,000
Land available-for-sale	21,100,000		'
Building and improvements held-for-sale	157,700,000		'
Intangible lease assets held-for-sale	14,900,000		'
Intangible lease liabilities held-for-sale	-5,600,000		'
Accumulated depreciation on assets	-50,600,000		'
Accumulated amortization of intangible lease liabilities	2,500,000		'
Number of industrial properties classified as held for sale	12		'
Industrial [Member] | Land [Member]	'		'
Schedule of Investments [Line Items]	'		'
Land	51,678,000	[1]	71,725,000
Industrial [Member] | Building and Building Improvements [Member]	'		'
Schedule of Investments [Line Items]	'		'
Building and Improvements	359,800,000	[1]	436,340,000
Industrial [Member] | Intangible Lease Assets [Member]	'		'
Schedule of Investments [Line Items]	'		'
Intangible Lease Assets	66,877,000	[1]	79,610,000
Retail [Member]	'		'
Schedule of Investments [Line Items]	'		'
Investment in real property, Gross book value	725,040,000		722,157,000
Intangible lease liabilities, Net book value	-51,059,000		-51,059,000
Real estate investments, Net book value	673,981,000		671,098,000
Retail [Member] | Land [Member]	'		'
Schedule of Investments [Line Items]	'		'
Land	227,218,000		227,218,000
Retail [Member] | Building and Building Improvements [Member]	'		'
Schedule of Investments [Line Items]	'		'
Building and Improvements	420,070,000		416,971,000
Retail [Member] | Intangible Lease Assets [Member]	'		'
Schedule of Investments [Line Items]	'		'
Intangible Lease Assets	$77,752,000		$77,968,000
[1]	Includes $21.1 million in land, $157.7 million in building and improvements, $14.9 million in intangible lease assets, and $5.6 million in intangible lease liabilities, before accumulated depreciation on assets of $50.6 million and accumulated amortization of intangible lease liabilities of $2.5 million, related to 12 industrial properties classified as held for sale in the accompanying balance sheet as of December 31, 2013.

Investments_in_Real_Property_S

Investments in Real Property (Summary of Disposed Properties) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2013

Jan. 22, 2014

Jan. 22, 2014

sqft

sqft

sqft

Office Property; Dallas, TX Market [Member]

Office Property; Dallas, TX Market [Member]

Office Property; Dallas, TX Market [Member]

Industrial Portfolio Properties; Various Markets [Member]

Office (2) Property; Dallas TX Market [Member]

Office Property; New England Market [Member]

Office Property; Denver, CO Market [Member]

Office Property (2); Denver, CO Market [Member]

Office Property; Chicago, IL Market [Member]

Retail Property, New England Market [Member]

Retail Property, New England Market [Member]

Office Property, Silicon Valley Market [Member]

Office Property, Silicon Valley Market [Member]

Industrial Property, Louisville, KY Market [Member]

Industrial Property, Cincinnati OH Market [Member]

Office Property (2), Silicon Valley, CA Market [Member]

Industrial Property, Kansas City, MO Market [Member]

Industrial Portfolio Properties (2), Various Markets [Member]

Subsequent Event [Member]

Subsequent Event [Member]

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

property

sqft

Industrial Portfolio Properties (2), Various Markets [Member]

property

sqft

Significant Acquisitions and Disposals [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

DPF Ownership

'

'

'

100.00%

100.00%

'

96.40%

[1]

100.00%

[2]

100.00%

100.00%

100.00%

100.00%

100.00%

100.00%

90.00%

97.50%

90.00%

95.60%

100.00%

88.60%

'

'

92.50%

[3]

Square feet

4,111,000

610,000

1,069,000

62,000

'

'

1,918,000

[1]

1,509,000

[2]

132,000

257,000

133,000

100,000

19,000

46,000

427,000

52,000

164,000

604,000

187,000

180,000

'

3,387,000

3,387,000

[3]

Disposition Date

'

'

'

13-Jan-13

'

'

10-May-13

[1]

31-May-13

[2]

6-Jun-13

31-Jul-13

13-Sep-13

15-Oct-13

27-Feb-12

21-Dec-11

31-Jul-12

23-Sep-11

5-Jun-12

17-Oct-11

18-Nov-11

21-Nov-11

'

'

22-Jan-14

[3]

Gain (Loss)

$74,286,000

$21,113,000

$10,782,000

$1,217,000

'

'

($311,000)

[1]

$15,462,000

[2]

$6,734,000

$35,371,000

$10,233,000

$5,580,000

($328,000)

$2,266,000

$19,584,000

$1,187,000

$1,857,000

($1,046,000)

$8,305,000

$70,000

'

'

'

Number of properties

'

'

'

'

'

'

7

'

'

'

'

'

'

'

'

'

'

'

'

'

12

'

'

Unpaid principal balance

$57,900,000

'

'

'

$179,800,000

$177,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest bearing on mortgage note

6.01%

5.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Industrial portfolio included seven properties located in the following markets: Philadelphia, PA, Sacramento, CA, Central Pennsylvania, Charlotte, NC, Atlanta, GA, and Chicago, IL.

[2]

During the year ended December 31, 2012, we became the 100% owner of the titleholder of a 1.5 million square foot office property in the Dallas, TX market (bComerica Bank Towerb), as the result of our foreclosure of a non-performing mezzanine loan for which such ownership interest had served as collateral. Comerica Bank Tower was subject to a mortgage note with a principal balance of $179.8 million as of the acquisition date bearing interest at 5.8%, which matures in January 2017. On September 10, 2012, we were notified that a receiver (the bReceiverb) had been appointed for the Comerica Bank Tower. As of March 31, 2013, the unpaid principal balance of this mortgage note was $177.4 million. On May 31, 2013, Comerica Bank Tower was sold by the Receiver pursuant to court order to a purchaser unaffiliated with us. Because of the outstanding principal balance of the mortgage note, we did not receive any proceeds from the sale of Comerica Bank Tower.

[3]

Industrial portfolio included 12 properties located in the following markets: Atlanta, GA, Central Pennsylvania, Cincinnati, OH, Columbus, OH, Dallas, TX, Indianapolis, IN, and Minneapolis/St. Paul, MN.

Investments_in_Real_Property_S1

Investments in Real Property (Summary of Income and Expenses Attributable to Discontinued Operations) (Details) (USD $)

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Investments in Real Property [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

$39,023,000

$61,461,000

$53,603,000

[1]

Rental expense

'

'

'

'

'

'

'

'

-14,020,000

-21,731,000

-12,709,000

[1]

Real estate depreciation and amortization expense

'

'

'

'

'

'

'

'

-21,017,000

-37,989,000

-33,483,000

[1]

Impairment of real estate properties

'

'

'

'

'

'

'

'

'

-5,700,000

-23,500,000

[1]

Interest expense

'

'

'

'

'

'

'

'

-12,662,000

-23,771,000

-18,429,000

[1]

Other expenses

'

'

'

'

'

'

'

'

-56,000

-793,000

-625,000

[1]

Income (loss) from discontinued operations, net of taxes

'

'

'

'

'

'

'

'

-8,732,000

-28,523,000

-35,143,000

[1]

Gain on disposition, net of taxes

'

'

'

'

'

'

'

'

74,286,000

21,113,000

13,633,000

[1]

Discontinued operations, net of taxes

5,512,000

45,403,000

18,754,000

-4,115,000

-12,778,000

13,545,000

-3,896,000

-4,281,000

65,554,000

[2]

-7,410,000

[2]

-21,510,000

[1],[2]

Gain on disposition, profit participation

'

'

'

'

'

'

'

'

'

'

$2,900,000

[1]

Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

[2]

Includes approximately $2.6 million, $101,000, and $1.6 million paid to our Advisor for fees associated with the disposition of real properties during the years ended DecemberB 31, 2013, 2012, and 2011, respectively.

Investments_in_Real_Property_F

Investments in Real Property (Future Minimum Rental Receivable Under Non Cancelable Operating and Ground Leases) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments in Real Property [Abstract]	'
2014	$192,551
2015	181,583
2016	174,497
2017	129,026
2018	95,009
Thereafter	283,661
Total	$1,056,327

Investments_in_Real_Property_S2

Investments in Real Property (Summary of Top Five Tenants as Percentage of Consolidated Annual Base Rent and Square Feet) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
	sqft
	property
Concentration Risk [Line Items]	'
Locations	22
Annualized Rental Revenue	$76,602	[1]
% of Total Annualized Rental Revenue	38.80%
Square Feet	3,360,000
% of Total Portfolio Square Feet	23.50%
Charles Schwab and Company, Inc. [Member]	'
Concentration Risk [Line Items]	'
Locations	1
Industry	'Securities, Commodities, Fin. Inv./Rel. Activites
Annualized Rental Revenue	22,761	[1]
% of Total Annualized Rental Revenue	11.50%
Square Feet	594,000
% of Total Portfolio Square Feet	4.20%
Northrop Grumman, Inc. [Member]	'
Concentration Risk [Line Items]	'
Locations	2
Industry	'Professional, Scientific and Technical Services
Annualized Rental Revenue	17,532	[1]
% of Total Annualized Rental Revenue	8.90%
Square Feet	699,000
% of Total Portfolio Square Feet	4.90%
Sybase, Inc. [Member]	'
Concentration Risk [Line Items]	'
Locations	1
Industry	'Publishing Information (except Internet)
Annualized Rental Revenue	17,283	[1]
% of Total Annualized Rental Revenue	8.80%
Square Feet	405,000
% of Total Portfolio Square Feet	2.80%
Stop and Shop Supermarket Company LLC. [Member]	'
Concentration Risk [Line Items]	'
Locations	15
Industry	'Food and Beverage Stores
Annualized Rental Revenue	13,828	[1]
% of Total Annualized Rental Revenue	7.00%
Square Feet	872,000
% of Total Portfolio Square Feet	6.10%
Ceva Freight/Logistics [Member]	'
Concentration Risk [Line Items]	'
Locations	3
Industry	'Truck Transportation
Annualized Rental Revenue	$5,198	[1]
% of Total Annualized Rental Revenue	2.60%
Square Feet	790,000
% of Total Portfolio Square Feet	5.50%
[1]	Annualized base rent represents the annualized monthly base rent of executed leases as of DecemberB 31, 2013.

Debt_Related_Investments_Narra

Debt Related Investments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
	loan		loan
Investment [Line Items]	'		'		'
Number of debt investments	14		19		'
Weighted average maturity of our debt investments	'2 years 6 months		'		'
Interest only mortgage loan receivable on real estate	2		'		'
Number of debt investment repaid	4		3		'
Net cash proceeds from repayment	$28,100,000		$5,900,000		'
Principal repayment	73,700,000		22,300,000		'
Prepayment of fee	435,000		1,400,000		'
Repayments of borrowings	46,200,000		17,800,000		'
Investment in real property	1,924,642,000	[1]	2,336,768,000	[1]	'
Provision losses	'		'		23,037,000
Direct write off of allowance for loan loss	15,000,000		20,000,000		'
Unpaid principal balance of impaired debt investments	3,000,000		30,100,000		'
Number of impaired debt investments	1		3		'
B-notes [Member]	'		'		'
Investment [Line Items]	'		'		'
Number of Nonaccrual Loans Receivable	1		2		'
Mortgage Notes [Member]	'		'		'
Investment [Line Items]	'		'		'
Number of debt investment repaid	3		'		'
B Notes [Member]	'		'		'
Investment [Line Items]	'		'		'
Number of debt investment repaid	1		'		'
LIBOR floor rate	'		'		4.00%
LIBOR plus rate	'		'		3.25%
Investment in real property	'		12,100,000		'
Provision losses	$3,000,000		'		'
Number of non accrual loans written off	'		1		'
Non-delinquent Mortgage Loans on Real Estate [Member]	'		'		'
Investment [Line Items]	'		'		'
Number of debt investments	13		'		'
Subordinate Mortgage Loans on Real Estate [Member]	'		'		'
Investment [Line Items]	'		'		'
Number of debt investments	2		'		'
[1]	Includes approximately $82.4 million and $520.3 million, after accumulated depreciation and amortization, in consolidated real property variable interest entity investments as of December 31, 2013 and 2012, respectively. (2)Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.

Debt_Related_Investments_Sched

Debt Related Investments (Schedule of Debt Related Income Footnote) (Details) (USD $)

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

security

loan

loan

security

Investment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Debt related income

$2,790,000

$2,309,000

$2,615,000

$2,735,000

$2,747,000

$3,019,000

$1,759,000

$1,884,000

$10,449,000

9,409,000

$11,107,000

Weighted Average Yield

7.10%

[1]

'

'

'

'

'

'

'

7.10%

[1]

'

'

Number of variable interest loans receivable

1

'

'

'

'

'

'

'

1

'

'

Carrying amount of floating rate debt investments

25,000,000

'

'

'

'

'

'

'

25,000,000

'

'

Number of debt investment repaid

'

'

'

'

'

'

'

'

4

3

'

Floating-Rate Debt Related Investments, Net [Member]

'

'

'

'

'

'

'

'

'

'

'

Investment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Yield

0.00%

'

'

'

'

'

'

'

0.00%

'

'

Mortgage Notes [Member]

'

'

'

'

'

'

'

'

'

'

'

Investment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Debt related income

'

'

'

'

'

'

'

'

8,726,000

[2]

8,732,000

[2]

6,890,000

[2]

Weighted Average Yield

5.70%

[1],[2]

'

'

'

'

'

'

'

5.70%

[1],[2]

'

'

Number of debt investment repaid

'

'

'

'

'

'

'

'

3

'

'

B Notes [Member]

'

'

'

'

'

'

'

'

'

'

'

Investment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Debt related income

'

'

'

'

'

'

'

'

51,000

433,000

2,371,000

Weighted Average Yield

0.00%

[1]

'

'

'

'

'

'

'

0.00%

[1]

'

'

Number of debt investment repaid

'

'

'

'

'

'

'

'

1

'

'

Mezzanine Debt [Member]

'

'

'

'

'

'

'

'

'

'

'

Investment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Debt related income

'

'

'

'

'

'

'

'

$1,672,000

244,000

$1,846,000

Weighted Average Yield

16.70%

[1]

'

'

'

'

'

'

'

16.70%

[1]

'

'

[1]

Weighted average yield is calculated on an unlevered basis using the amount invested, current interest rates and accretion of premiums or discounts realized upon the initial investment for each investment type as of December 31, 2013. Yields for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of December 31, 2013 for purposes of this table. As of December 31, 2013, we had one debt related investment with a net investment amount of $25.0 million that bears interest at a floating rate indexed to LIBOR. All of our remaining debt related investments bear interest at fixed rates. We have assumed a yield of zero on the one debt related investment for which we have recognized a full allowance for loss as of December 31, 2013.

[2]

We had four and three debt related investments repaid in full during the years ended December 31, 2013 and 2012, respectively. Amounts recorded include an early repayment fee received and accelerated amortization of origination fees offset by accelerated amortization of deferred due diligence costs related to these repayments.

Debt_Related_Investments_Debt_

Debt Related Investments (Debt Investment Activity) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investment in debt related investments:	'	'
Beginning balance	$187,321	$92,247
Investments	12,323	121,842
Principal repayments	-75,702	-25,093
Amortization of deferred fees, costs, and discounts/premiums	-7	-1,675
Ending balance	$123,935	$187,321

Debt_Related_Investments_Sched1

Debt Related Investments (Schedule of Debt Related Investments) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Investment [Line Items]	'		'	'
Interest Rate as of December 31, 2013	7.60%	[1]	'	'
Face Amount of Debt	$125,813	[2]	'	'
Debt related investments, net	123,935		187,321	92,247
Mortgage Notes [Member] | Pacific [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Pacific		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	7.50%	[1]	'	'
Maturity Date	8-Oct-14	[3]	'	'
Face Amount of Debt	17,000	[2]	'	'
Debt related investments, net	17,098		'	'
Mortgage Notes [Member] | West North Central [Member] | Fixed [Member] | Mortgage Note 1 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'West North Central		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	7.80%	[1]	'	'
Maturity Date	1-Apr-15	[3]	'	'
Face Amount of Debt	9,074	[2]	'	'
Debt related investments, net	9,389		'	'
Mortgage Notes [Member] | West North Central [Member] | Fixed [Member] | Mortgage Note 2 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'West North Central		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	6.00%	[1]	'	'
Maturity Date	1-Jul-18	[3]	'	'
Face Amount of Debt	6,930	[2]	'	'
Debt related investments, net	6,887		'	'
Mortgage Notes [Member] | Mountain [Member] | Fixed [Member] | Mortgage Note 1 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Mountain		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	7.70%	[1]	'	'
Maturity Date	1-Apr-15	[3]	'	'
Face Amount of Debt	9,083	[2]	'	'
Debt related investments, net	9,175		'	'
Mortgage Notes [Member] | Mountain [Member] | Fixed [Member] | Mortgage Note 2 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Mountain		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	6.20%	[1]	'	'
Maturity Date	1-Sep-16	[3]	'	'
Face Amount of Debt	2,966	[2]	'	'
Debt related investments, net	3,011		'	'
Mortgage Notes [Member] | Mountain [Member] | Fixed [Member] | Mortgage Note 3 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Mountain		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	5.20%	[1]	'	'
Maturity Date	1-Mar-21	[3]	'	'
Face Amount of Debt	3,450	[2]	'	'
Debt related investments, net	3,429		'	'
Mortgage Notes [Member] | Southeast [Member] | Fixed [Member] | Mortgage Note 1 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Southeast		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	6.30%	[1]	'	'
Maturity Date	1-Feb-18	[3]	'	'
Face Amount of Debt	9,213	[2]	'	'
Debt related investments, net	9,570		'	'
Mortgage Notes [Member] | Southeast [Member] | Fixed [Member] | Mortgage Note 2 [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Southeast		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	7.00%	[1]	'	'
Maturity Date	1-Mar-19	[3]	'	'
Face Amount of Debt	9,170	[2]	'	'
Debt related investments, net	9,331		'	'
Mortgage Notes [Member] | East North Central [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'East North Central		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	6.10%	[1]	'	'
Maturity Date	1-Apr-18	[3]	'	'
Face Amount of Debt	7,746	[2]	'	'
Debt related investments, net	7,354		'	'
Mortgage Notes [Member] | Northeast [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Northeast		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	6.20%	[1]	'	'
Maturity Date	1-Nov-17	[3]	'	'
Face Amount of Debt	3,841	[2]	'	'
Debt related investments, net	3,903		'	'
Mortgage Notes [Member] | Northeast [Member] | Variable [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Northeast		'	'
Interest Rate Fixed or Variable	'Variable		'	'
Interest Rate as of December 31, 2013	5.20%	[1]	'	'
Maturity Date	7-Jun-15	[3]	'	'
Face Amount of Debt	25,000	[2]	'	'
Debt related investments, net	25,211		'	'
Mortgage Notes [Member] | South West [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Southwest		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	5.80%	[1]	'	'
Maturity Date	1-Jun-14	[3]	'	'
Face Amount of Debt	3,675	[2]	'	'
Debt related investments, net	3,677		'	'
B Notes [Member] | Pacific [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Pacific	[4]	'	'
Interest Rate Fixed or Variable	'Fixed	[4]	'	'
Interest Rate as of December 31, 2013	0.00%	[1],[4]	'	'
Maturity Date	1-Jan-11	[3],[4]	'	'
Face Amount of Debt	3,000	[2],[4]	'	'
Mezzanine Debt [Member] | Mid-Atlantic [Member] | Fixed [Member]	'		'	'
Investment [Line Items]	'		'	'
Region	'Mid-Atlantic		'	'
Interest Rate Fixed or Variable	'Fixed		'	'
Interest Rate as of December 31, 2013	17.00%	[1]	'	'
Maturity Date	1-Jul-16	[3]	'	'
Face Amount of Debt	15,665	[2]	'	'
Debt related investments, net	$15,900		'	'
[1]	Rates for LIBOR-based, floating-rate investments have been calculated using the one-month LIBOR rate as of DecemberB 31, 2013 for purposes of this table.
[2]	Reflects the principal amount of the debt investment outstanding, which is net of principal repayments.
[3]	Reflects the initial maturity of the investment or any exercised options to extend and does not consider any future options to extend that are at the discretion of the borrower.
[4]	We have recorded a provision for loan loss of $3.0 million related to this B-note investment as of DecemberB 31, 2013, and we have assumed a yield of 0%.

Debt_Related_Investments_Recon

Debt Related Investments (Reconciliation of Allowance for Loan Loss on Debt Related Investments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Related Investments [Abstract]	'	'
Beginning balance as of December 31, 2012:	$18,000,000	'
Direct write offs	-15,000,000	-20,000,000
Ending balance as of December 31, 2013:	$3,000,000	$18,000,000

Debt_Related_Investments_Recor

Debt Related Investments (Recorded Investment in Debt Related Investments before Allowance for Loan Loss, and Related Allowance for Loan Loss) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Debt Related Investments [Abstract]	'	'	'
Debt investments	$126,935	$205,321	'
Less: Allowance for loan losses	-3,000	-18,000	'
Total	$123,935	$187,321	$92,247

Debt_Related_Investments_Gross

Debt Related Investments (Gross Recorded Investment in Impaired Debt Related Investments, Related Allowance For Loan Loss, and Total Amount Of Impaired Loans) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Related Investments [Abstract]	'	'
Recorded Investment	$3,000	$30,135
Related Allowance	-3,000	-18,000
Amount of Impaired Loans With No Allowance Recorded	'	$12,135

Debt_Related_Investments_Avera

Debt Related Investments (Average Recorded Net Investment in Impaired Debt Related Investments and Related Interest Income Recorded) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Related Investments [Abstract]	'	'	'
Average Recorded Investment	$6,067	$12,930	$25,314
Interest Income Recognized	$51	$433	$3,060

Debt_Obligations_Narrative_Det

Debt Obligations (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
	property
	loan
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Number of interest-only mortgage notes	12		'	'
Number of amortizing mortgage notes	20		'	'
Interest-only mortgage notes, outstanding balance	$341,400,000		'	'
Amortizing mortgage notes outstanding balance	635,600,000		'	'
Total unsecured borrowings	300,000,000		300,000,000	'
Assumed mortgage note unpaid principal balance outstanding	57,900,000		'	'
Number of properties sold	12		'	'
Discount rate	8.50%		'	'
Preliminary estimate of fair value of assumed mortgage	57,897,000		124,800,000	'
Line of credit, amount outstanding	30,000,000		30,000,000	'
Current borrowing capacity	320,000,000		'	'
Available borrowing under revolving credit facility	86,100,000		150,000,000	'
Repaid of outstanding borrowings	29,046,000		291,281,000	11,109,000
Outstanding Balance	1,322,277,000	[1],[2]	'	'
Interest bearing on mortgage note	6.01%		5.80%	'
Restructured mortgage note face value	125,813,000	[3]	'	'
Comerica Bank Tower [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Assumed mortgage note unpaid principal balance outstanding	177,300,000		'	'
Mortgage notes, fair value	'		123,000,000	'
Repurchase Facility [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Loss on financing commitments and early repayment of debt	479,000		'	'
Outstanding borrowing spread over LIBOR	2.25%		'	'
Outstanding Balance	45,300,000		'	'
Interest rate	2.84%		'	'
Repurchase Facility [Member] | Minimum [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Outstanding borrowing spread over LIBOR	'		2.25%	'
Repurchase Facility [Member] | Maximum [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Outstanding borrowing spread over LIBOR	'		3.00%	'
Repayment Of Mortgage Note	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Assumed mortgage note unpaid principal balance outstanding	14,500,000		'	'
Loss on financing commitments and early repayment of debt	233,000		'	'
Disposal Of Mortgage Notes [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Assumed mortgage note unpaid principal balance outstanding	117,600,000		'	'
Number of properties sold	8		'	'
Subsequent Disposal Of Mortgage Notes [Member]	'		'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'	'
Assumed mortgage note unpaid principal balance outstanding	80,400,000		'	'
Loss on financing commitments and early repayment of debt	$1,800,000		'	'
Number of properties sold	11		'	'
[1]	Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.
[2]	Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.(6)As of December 31, 2013, our mortgage notes and secured borrowings are secured by interests in real properties and debt investments totaling approximately $2.0 billion.
[3]	Reflects the principal amount of the debt investment outstanding, which is net of principal repayments.

Debt_Obligations_Summary_of_Bo

Debt Obligations (Summary of Borrowings) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	4.90%		4.80%
Outstanding Balance	$1,323,472,000		$1,619,452,000	[1]
Gross Investment Amount Securing Borrowings	1,980,243,000		2,302,755,000	[2]
Adjustment to mortgages	0		55,000,000
Unamortized net discount at end of period on debt payable	2,700,000		-2,700,000
Troubled debt restructuring amortization	1,500,000		718,000
Liabilities held for sale	86,668,000	[3]	'
Mortgage notes	943,045,000	[4]	1,319,452,000	[4]
Line of credit, amount outstanding	30,000,000		30,000,000
Total unsecured borrowings	300,000,000		300,000,000
Fixed Rate Secured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	5.80%	[5]	5.80%	[5]
Outstanding Balance	969,622,000	[5]	1,160,042,000	[1],[5]
Gross Investment Amount Securing Borrowings	1,898,946,000	[5]	2,061,757,000	[2],[5]
Floating-Rate Mortgage Notes [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	3.90%	[6]	3.50%	[6]
Outstanding Balance	8,580,000	[6]	23,701,000	[1],[6]
Gross Investment Amount Securing Borrowings	15,571,000	[6]	42,609,000	[2],[6]
Outstanding borrowing spread over LIBOR	3.75%		'
Total mortgage Notes [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	5.80%		5.70%
Outstanding Balance	978,202,000		1,183,743,000	[1]
Gross Investment Amount Securing Borrowings	1,914,517,000		2,104,366,000	[2]
Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	2.80%	[7]	3.00%	[7]
Outstanding Balance	45,270,000	[7]	135,709,000	[1],[7]
Gross Investment Amount Securing Borrowings	65,726,000	[7]	198,389,000	[2],[7]
Outstanding borrowing spread over LIBOR	2.25%		'
Interest rate	2.84%		'
Mortgage notes	45,300,000		'
Total other secured borrowings	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	2.80%		3.00%
Outstanding Balance	45,270,000		135,709,000	[1]
Gross Investment Amount Securing Borrowings	65,726,000		198,389,000	[2]
Total Secured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	5.60%		5.40%
Outstanding Balance	1,023,472,000		1,319,452,000	[1]
Gross Investment Amount Securing Borrowings	1,980,243,000		2,302,755,000	[2]
Line of Credit [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	1.90%		2.20%
Outstanding Balance	30,000,000		30,000,000	[1]
Term Loan [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	2.20%	[8]	2.20%	[8]
Outstanding Balance	270,000,000	[8]	270,000,000	[1],[8]
Outstanding borrowing spread over LIBOR	1.70%		1.95%
Total unsecured borrowings	270,000,000		270,000,000
Unsecured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	2.20%		2.20%
Outstanding Balance	300,000,000		300,000,000	[1]
Interest rate	2.34%		'
Fixed Rate Secured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Weighted Average Stated Interest Rate	6.10%		'
Outstanding Balance	80,400,000		'
Gross Investment Amount Securing Borrowings	170,300,000		'
Fixed Rate Secured Borrowings [Member] | Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	'		79,100,000
Interest rate	'		3.14%
Fixed Rate Secured Borrowings [Member] | Unsecured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	$200,000,000		'
Minimum [Member] | Floating-Rate Mortgage Notes [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding borrowing spread over LIBOR	'		2.90%
Minimum [Member] | Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding borrowing spread over LIBOR	'		2.25%
Maximum [Member] | Floating-Rate Mortgage Notes [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding borrowing spread over LIBOR	'		3.75%
Maximum [Member] | Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding borrowing spread over LIBOR	'		3.00%
[1]	Amounts presented are net of (i)B fair value adjustment to mortgages carried at fair value of $0 and $55.0 million as of December 31, 2013 and 2012, respectively, (ii)B unamortized premiums (discounts) to the face value of our outstanding fixed-rate mortgages of $2.7 million and ($2.7) million as of DecemberB 31, 2013 and 2012, respectively, and (iii)B GAAP principal amortization related to troubled debt restructurings of $1.5 million and $718,000 as of DecemberB 31, 2013 and 2012, respectively.
[2]	bGross Investment Amountb as used here and throughout this document represents the allocated gross basis of real property and debt related investments, after certain adjustments. Gross Investment Amount for real property (i)B includes the effect of intangible lease liabilities, (ii)B excludes accumulated depreciation and amortization, and (iii)B includes the impact of impairments.B Amounts reported for debt related investments represent our net accounting basis of the debt investments, which includes (i)B unpaid principal balances, (ii)B unamortized discounts, premiums, and deferred charges, andB (iii) allowances for loan loss.
[3]	Includes approximately $80.4 million in consolidated mortgage notes in variable interest entity investments as of DecemberB 31, 2013.
[4]	Includes approximately $60.7 million and $419.5 million in consolidated mortgage notes in variable interest entity investments as of December 31, 2013 and 2012, respectively.
[5]	Fixed-rate mortgages presented include outstanding balances included within liabilities related to assets held for sale as of December 31, 2013 of approximately $80.4 million at a weighted average interest rate of 6.1% secured by gross investments of approximately $170.3 million.
[6]	As of December 31, 2013, our floating-rate mortgage note was subject to an interest rate spread of 3.75% over one-month LIBOR. As of DecemberB 31, 2012, our floating-rate mortgage notes were subject to interest rates at spreads ranging from 2.9% to 3.75% over one-month LIBOR.
[7]	As of December 31, 2013, borrowings under our repurchase facility were subject to interest at a floating rate of 2.25% over one-month LIBOR. However, we had effectively fixed the interest rate of the borrowings using an interest rate swap, resulting in a fixed interest rate of 2.84% for the term of the borrowings (provided that our borrowing balance does not exceed our derivative instrument notional during that term). As of December 31, 2012, borrowings under our repurchase facilities were subject to interest at floating rates at spreads ranging from 2.25% to 3% over one-month LIBOR. As of December 31, 2012, we had effectively fixed the interest rate of approximately $79.1 million of the total of $135.7 million in borrowings using interest rate swaps at 3.14%, resulting in a weighted average interest rate on the total repurchase facility of 3.04%.
[8]	As of December 31, 2013, borrowings under our term loan were subject to interest at a floating rate of 1.70% over one-month LIBOR. However, we had effectively fixed the interest rate for $200.0 million of the total of $270.0 million in borrowings using interest rate swaps at 2.34%, resulting in a weighted average interest rate on the total term loan of 2.21%. As of December 31, 2012, borrowings of $270.0 million under our term loan were subject to interest at a floating rate of 1.95% over one-month LIBOR, resulting in a weighted average interest rate on the total term loan of 2.16%.

Debt_Obligations_Summary_of_Bo1

Debt Obligations (Summary of Borrowings Reflects Contractual Debt Maturities Footnote) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
	item
Debt Instrument [Line Items]	'		'
Outstanding Balance	$1,322,277,000	[1],[2]	'
Secured debt	943,045,000	[3]	1,319,452,000	[3]
Number of debt borrowings classified within liabilities held for sale	3		'
Line of credit, amount outstanding	30,000,000		30,000,000
Adjustment to mortgages	0		55,000,000
Mark to market adjustment on assumed debt	2,700,000		'
Troubled debt restructuring amortization	1,500,000		718,000
Gross Investment Amount Securing Borrowings	1,980,243,000		2,302,755,000	[4]
Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Repurchase agreement borrowing maturity period	'2014		'
2014 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	145,190,000	[1],[2]	'
2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	127,206,000	[1],[2]	'
2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	377,496,000	[1],[2]	'
2017 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	223,371,000	[1],[2]	'
2018 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	274,999,000	[1],[2]	'
2019 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	5,292,000	[1],[2]	'
2020 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	157,944,000	[1],[2]	'
2021 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	1,707,000	[1],[2]	'
2022 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	1,663,000	[1],[2]	'
2023 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	978,000	[1],[2]	'
Thereafter [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	6,431,000	[1],[2]	'
Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	1		'
Outstanding Balance	45,300,000		'
Secured debt	45,300,000		'
Extension Option, In Years	'1 year		'
Gross Investment Amount Securing Borrowings	65,726,000	[5]	198,389,000	[4],[5]
Mortgage Notes [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	3		'
Outstanding Balance	38,900,000		'
Secured debt	977,000,000		'
Mortgage Notes [Member] | Minimum [Member]	'		'
Debt Instrument [Line Items]	'		'
Debt instrument maturity year	'2014		'
Mortgage Notes [Member] | Maximum [Member]	'		'
Debt Instrument [Line Items]	'		'
Debt instrument maturity year	'2029		'
Mortgage Notes [Member] | 2014 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	39,700,000		'
Mortgage Notes [Member] | 2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	30,900,000		'
Mortgage Notes [Member] | 2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	9,800,000		'
Mortgage Notes [Member] | Repurchase Facility [Member]	'		'
Debt Instrument [Line Items]	'		'
Outstanding Balance	132,500,000		'
Mortgage Notes and Other Secured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	33		'
Outstanding Balance	1,022,277,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2014 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	4		'
Outstanding Balance	145,190,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	5		'
Outstanding Balance	127,206,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	13		'
Outstanding Balance	347,496,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2017 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	7		'
Outstanding Balance	223,371,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2018 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Outstanding Balance	4,999,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2019 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Outstanding Balance	5,292,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2020 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	1		'
Outstanding Balance	157,944,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2021 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Outstanding Balance	1,707,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2022 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	1		'
Outstanding Balance	1,663,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | 2023 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Outstanding Balance	978,000	[6],[7],[8]	'
Mortgage Notes and Other Secured Borrowings [Member] | Thereafter [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	2		'
Outstanding Balance	6,431,000	[6],[7],[8]	'
Unsecured Borrowings [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	2		'
Outstanding Balance	300,000,000	[9]	'
Extension Option, In Years	'1 year		'
Unsecured Borrowings [Member] | 2014 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2016 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	1		'
Outstanding Balance	30,000,000	[9]	'
Line of credit, amount outstanding	30,000,000		'
Unsecured Borrowings [Member] | 2017 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2018 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	1		'
Outstanding Balance	$270,000,000	[9]	'
Term Loan borrowings maturity period	'2018		'
Unsecured Borrowings [Member] | 2019 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2020 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2021 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2022 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | 2023 [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
Unsecured Borrowings [Member] | Thereafter [Member]	'		'
Debt Instrument [Line Items]	'		'
Number of Borrowings Maturing	0		'
[1]	Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.
[2]	Outstanding balance represents expected cash outflows for contractual amortization and scheduled balloon payment maturities and does not includeB the mark-to-market adjustment on assumed debt of $2.7 million as of December 31, 2013, partially offset by the GAAP principal amortization of our restructured mortgage note of approximately $1.5 million that does not reduce the contractual amount due of the related mortgage note as of December 31, 2013.(6)As of December 31, 2013, our mortgage notes and secured borrowings are secured by interests in real properties and debt investments totaling approximately $2.0 billion.
[3]	Includes approximately $60.7 million and $419.5 million in consolidated mortgage notes in variable interest entity investments as of December 31, 2013 and 2012, respectively.
[4]	bGross Investment Amountb as used here and throughout this document represents the allocated gross basis of real property and debt related investments, after certain adjustments. Gross Investment Amount for real property (i)B includes the effect of intangible lease liabilities, (ii)B excludes accumulated depreciation and amortization, and (iii)B includes the impact of impairments.B Amounts reported for debt related investments represent our net accounting basis of the debt investments, which includes (i)B unpaid principal balances, (ii)B unamortized discounts, premiums, and deferred charges, andB (iii) allowances for loan loss.
[5]	As of December 31, 2013, borrowings under our repurchase facility were subject to interest at a floating rate of 2.25% over one-month LIBOR. However, we had effectively fixed the interest rate of the borrowings using an interest rate swap, resulting in a fixed interest rate of 2.84% for the term of the borrowings (provided that our borrowing balance does not exceed our derivative instrument notional during that term). As of December 31, 2012, borrowings under our repurchase facilities were subject to interest at floating rates at spreads ranging from 2.25% to 3% over one-month LIBOR. As of December 31, 2012, we had effectively fixed the interest rate of approximately $79.1 million of the total of $135.7 million in borrowings using interest rate swaps at 3.14%, resulting in a weighted average interest rate on the total repurchase facility of 3.04%.
[6]	Three of our mortgage notes and one of our repurchase facilities with an aggregate outstanding principal balance as of December 31, 2013 of approximately $132.5 million have initial maturities before December 31, 2014. One of these mortgage notes with an outstanding balance of $38.9 million, and the repurchase facility with an outstanding balance of $45.3 million have extension options beyond December 31, 2014. Borrowings that are subject to extension options are also subject to certain lender covenants and restrictions that we must meet to extend the initial maturity date. We currently believe that we will qualify for these extension options. However, we cannot guarantee that we will meet the requirements to extend the notes upon initial maturity. In the event that we do not qualify to extend the notes, we expect to repay them with proceeds from new borrowings or available proceeds from our revolving credit facility.
[7]	Three of our mortgage notes with outstanding balances of $39.7 million, $30.9 million, and $9.8 million, maturing in 2014, 2015, and 2016, respectively, were classified within liabilities associated with assets held for sale in the accompanying balance sheet as of December 31, 2013. These mortgages were assumed by the purchaser of the related portfolio of real properties subsequent to December 31, 2013.
[8]	Secured borrowings presented include (i)B mortgage note borrowings of approximately $977.0 million with maturities ranging from 2014 to 2029, and (ii)B borrowings under our repurchase facility of approximately $45.3 million, which matures in 2014 and is subject to three one-year extension options.
[9]	Unsecured borrowings presented include (i) borrowings under our revolving credit facility of $30.0 million, which matures in 2016, subject to two one-year extension options, and (ii)B term loan borrowings of $270.0 million which mature in 2018.

Hedging_Activities_Narrative_D

Hedging Activities (Narrative) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Scenario, Forecast [Member]

Designated Hedges [Member]

Designated Hedges [Member]

Undesignated Hedges [Member]

Undesignated Hedges [Member]

Undesignated Hedges [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Interest Rate Cap [Member]

Interest Rate Cap [Member]

Scenario, Forecast [Member]

Designated Hedges [Member]

Designated Hedges [Member]

Undesignated Hedges [Member]

Designated Hedges [Member]

Undesignated Hedges [Member]

agreement

agreement

agreement

agreement

agreement

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Estimated increase to interest expense related to termination of hedging instrument

'

'

'

'

'

'

$1,800,000

'

'

'

'

'

Estimated increase to interest expense related to active effective hedges of floating rate debt

1,000,000

'

'

'

'

'

'

'

'

'

'

'

Total notional amount

'

255,400,000

90,000,000

'

'

'

'

'

'

230,400,000

'

'

Number of outstanding derivatives

'

'

'

'

'

'

'

7

2

1

2

2

Undesignated derivative instruments loss recognized in income

'

'

'

$0

$19,000

$85,000

'

'

'

'

'

'

Hedging_Activities_Reconciliat

Hedging Activities (Reconciliation of Accumulated Other Comprehensive Loss, Net of Amounts Attributable to Noncontrolling Interests) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Beginning balance as of December 31, 2012	($16,196)	'	'
Amortization of interest expense	2,726	'	'
Change in fair value	352	'	'
Losses reclassified into loss on extinguishment of debt and financing commitments upon discontinuance of cash flow hedges (net of tax benefit of $0)	1,897	'	'
Total Other Comprehensive Income, net of tax	4,975	2,537	4,097
Attribution of and other adjustments to OCI attributable to noncontrolling interests	427	'	'
Ending balance as of December 31, 2013	-10,794	-16,196	'
Gains And Losses On Cash Flow Hedges [Member]	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Beginning balance as of December 31, 2012	-14,710	'	'
Amortization of interest expense	2,726	'	'
Change in fair value	352	'	'
Losses reclassified into loss on extinguishment of debt and financing commitments upon discontinuance of cash flow hedges (net of tax benefit of $0)	1,897	'	'
Total Other Comprehensive Income, net of tax	4,975	'	'
Attribution of and other adjustments to OCI attributable to noncontrolling interests	-141	'	'
Ending balance as of December 31, 2013	-9,876	'	'
Amortization of OCI into interest expense, Tax	0	'	'
Change in fair value recognized in OCI, Tax	0	'	'
Losses reclassified into loss on extinguishment of debt and financing commitments upon discontinuance of cash flow hedges, Tax	0	'	'
Unrealized Gains And Losses On Available-For-Sale Securities [Member]	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Beginning balance as of December 31, 2012	-1,486	'	'
Attribution of and other adjustments to OCI attributable to noncontrolling interests	568	'	'
Ending balance as of December 31, 2013	($918)	'	'

Hedging_Activities_Gross_Fair_

Hedging Activities (Gross Fair Value of Derivative Financial Instruments as Well as Their Classification) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'		'
Asset Derivatives, Fair value, Gross asset	$748		'
Liability Derivatives, Fair value, Gross liability	-43		-416
Designated Hedges [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset Derivatives, Fair value, Gross asset	748		'
Liability Derivatives, Fair value, Gross liability	-43		-403
Designated Hedges [Member] | Interest Rate Contract [Member] | Other Assets [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Asset Derivatives, Fair value, Gross asset	748	[1]	'
Designated Hedges [Member] | Interest Rate Contract [Member] | Other Liabilities [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability Derivatives, Fair value, Gross liability	-43	[1]	-403	[1]
Undesignated Hedges [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability Derivatives, Fair value, Gross liability	'		-13
Undesignated Hedges [Member] | Interest Rate Contract [Member] | Other Liabilities [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Liability Derivatives, Fair value, Gross liability	'		($13)	[1]
[1]	Although our derivative contracts are subject to master netting arrangements which serve as credit mitigants to both us and our counterparties under certain situations, we do not net our derivative fair values or any existing rights or obligations to cash collateral on the consolidated balance sheet.

Hedging_Activities_Effect_of_D

Hedging Activities (Effect of Derivative Financial Instruments on Financial Statements) (Details) (Interest Rate Contract [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Designated Hedges [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Amount of gain (loss) recognized in OCI (effective portion)	$352,000	($436,000)	($625,000)
Designated Hedges [Member] | Interest Expense [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Amount of loss reclassified from accumulated OCI into income (effective portion)	-2,726,000	-2,648,000	-2,862,000
Designated Hedges [Member] | Interest and Other Income [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Amount of loss recognized in income due to missed forecast (ineffective portion and amount excluded from effectiveness testing)	-1,897,000	-1,751,000	-600,000
Undesignated Hedges [Member] | Interest and Other Income [Member]	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'
Amount of gain (loss) recognized in income	'	($19,000)	($85,000)

Fair_Value_Disclosures_Narrati

Fair Value Disclosures (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Change in fair value of real estate securities	$0
Fair value of property	$14,500,000
Discount rate	8.50%
Minimum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Change in fair value, expected term	'12 years
Maximum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Change in fair value, expected term	'24 years

Fair_Value_Disclosures_Assets_

Fair Value Disclosures (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Real estate securities	$461	$461
Derivative instruments	748	'
Total assets	1,209	461
Liabilities	'	'
Mortgage notes carried at fair value	'	-122,995
Derivative instruments	-43	-416
Total liabilities	-43	-123,411
Fair Value, Inputs, Level 1 [Member]	'	'
Assets	'	'
Real estate securities	'	'
Derivative instruments	'	'
Total assets	'	'
Liabilities	'	'
Mortgage notes carried at fair value	'	'
Derivative instruments	'	'
Total liabilities	'	'
Fair Value, Inputs, Level 2 [Member]	'	'
Assets	'	'
Derivative instruments	748	'
Total assets	748	'
Liabilities	'	'
Derivative instruments	-43	-416
Total liabilities	-43	-416
Fair Value, Inputs, Level 3 [Member]	'	'
Assets	'	'
Real estate securities	461	461
Total assets	461	461
Liabilities	'	'
Mortgage notes carried at fair value	'	-122,995
Total liabilities	'	($122,995)

Fair_Value_Disclosures_Reconci

Fair Value Disclosures (Reconciliation of Fair Value Measurements Based on Significant Unobservable Inputs) (Details) (USD $)	12 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
	Mortgage Notes [Member]	Real Estate Securities [Member]	Real Estate Securities [Member]	Derivative Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning balance as of December 31, 2012	($122,995)	$461	$461	($416)
Net income (other income and expense)	'	'	'	-8
Other comprehensive income (Unrealized change from cash flow hedging derivatives)	'	'	'	352
Total change in fair value	'	'	'	344
Settlements	122,995	'	'	777
Ending balance as of December 31, 2013	'	$461	$461	$705

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Carrying (Reported) Amount, Fair Value Disclosure [Member]	'	'
Assets:	'	'
Derivative instruments	$748	'
Liabilities:	'	'
Derivative liabilities	43	416
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Real Estate Securities [Member]	'	'
Assets:	'	'
Investments in real estate securities	461	461
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fixed-Rate Debt Related Investments, Net [Member]	'	'
Assets:	'	'
Fixed-rate debt related investments, net	98,724	108,482
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Floating-Rate Debt Related Investments, Net [Member]	'	'
Assets:	'	'
Floating-rate debt related investments, net	25,211	78,839
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fixed Rate Secured Borrowings [Member]	'	'
Liabilities:	'	'
Fixed-rate mortgage notes carried at amortized cost	969,622	1,037,047
Fixed-rate mortgage notes carried at fair value	'	122,995
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Floating-Rate Mortgage Notes [Member]	'	'
Liabilities:	'	'
Floating-rate mortgage notes	8,580	23,701
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fixed Rate Other Secured Borrowings [Member]	'	'
Liabilities:	'	'
Floating-rate other secured borrowings	45,270	135,709
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Floating Rate Un-Secured Borrowings [Member]	'	'
Liabilities:	'	'
Floating-rate unsecured borrowings	300,000	300,000
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Assets:	'	'
Derivative instruments	748	'
Liabilities:	'	'
Derivative liabilities	43	416
Estimate of Fair Value, Fair Value Disclosure [Member] | Real Estate Securities [Member]	'	'
Assets:	'	'
Investments in real estate securities	461	461
Estimate of Fair Value, Fair Value Disclosure [Member] | Fixed-Rate Debt Related Investments, Net [Member]	'	'
Assets:	'	'
Fixed-rate debt related investments, net	101,012	110,796
Estimate of Fair Value, Fair Value Disclosure [Member] | Floating-Rate Debt Related Investments, Net [Member]	'	'
Assets:	'	'
Floating-rate debt related investments, net	24,504	79,803
Estimate of Fair Value, Fair Value Disclosure [Member] | Fixed Rate Secured Borrowings [Member]	'	'
Liabilities:	'	'
Fixed-rate mortgage notes carried at amortized cost	1,010,085	1,091,425
Fixed-rate mortgage notes carried at fair value	'	122,995
Estimate of Fair Value, Fair Value Disclosure [Member] | Floating-Rate Mortgage Notes [Member]	'	'
Liabilities:	'	'
Floating-rate mortgage notes	8,582	23,738
Estimate of Fair Value, Fair Value Disclosure [Member] | Fixed Rate Other Secured Borrowings [Member]	'	'
Liabilities:	'	'
Floating-rate other secured borrowings	45,270	135,931
Estimate of Fair Value, Fair Value Disclosure [Member] | Floating Rate Un-Secured Borrowings [Member]	'	'
Liabilities:	'	'
Floating-rate unsecured borrowings	$301,690	$300,000

Noncontrolling_Interests_Narra

Noncontrolling Interests (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	property
Noncontrolling Interest [Line Items]	'	'
Purchase in joint venture	4,400,000	'
Decrease in noncontrolling interest	1,600,000	'
Office Property [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Purchase in joint venture	'	3,000,000
Decrease in noncontrolling interest	'	1,600,000
Number of properties purchased under portfolio	2	'
Industrial [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Number of properties purchased under portfolio	2	'
Class E [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Shares redeemed	10,000,000	9,200,000
Operating Partnership Units [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Number of Operating Partnership Units held by the general partner	200	'
Contribution for OP Units	2,000	'
Percentage of proceeds received contributed to our Operating Partnership	100.00%	'
Limited partnership interest owned in Operating Partnership	93.00%	92.60%
Operating Partnership Units [Member] | Class E [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Partnership unit conversion rate to shares of common stock	1	'
Shares of common stock issued for redemption of OP Units	0	269,000
Shares OP Units redeemed	0	273,000
Shares redeemed	904,000	1,700,000
OP Units redemption value maximum	6,200,000	12,800,000
Operating Partnership Units [Member] | Class E [Member] | Scenario 1 [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
OP Units redemption value maximum	92,000,000	$95,000,000
Operating Partnership units issued	13,300,000	14,200,000
Operating Partnership units outstanding	13,300,000	14,200,000

Noncontrolling_Interests_Summa

Noncontrolling Interests (Summary of Noncontrolling Interest Balances) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Beginning Balance	'	'	'	$95,831	'	'	'	'	$95,831	'	'
Net income	-85	3,257	1,329	-499	-1,240	2,680	-701	-849	4,002	-110	-6,886
Contributions of noncontrolling interests	'	'	'	'	'	'	'	'	212	1,053	28,065
Distributions	'	'	'	'	'	'	'	'	-5,446	-8,617	'
Ending Balance	91,906	'	'	'	95,831	'	'	'	91,906	95,831	'
Operating Partnership Units [Member]	'	'	'	'	'	'	'	'	'	'	'
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Beginning Balance	'	'	'	88,259	'	'	'	'	88,259	'	'
Net income	'	'	'	'	'	'	'	'	4,010	'	'
Unrealized change from cash flow hedging derivatives	'	'	'	'	'	'	'	'	354	'	'
Distributions	'	'	'	'	'	'	'	'	-4,807	'	'
Redemption and buyout of noncontrolling interests, net	'	'	'	'	'	'	'	'	-1,408	'	'
Ending Balance	86,408	'	'	'	'	'	'	'	86,408	'	'
Joint Venture Partners [Member]	'	'	'	'	'	'	'	'	'	'	'
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Beginning Balance	'	'	'	7,572	'	'	'	'	7,572	'	'
Net income	'	'	'	'	'	'	'	'	-8	'	'
Contributions of noncontrolling interests	'	'	'	'	'	'	'	'	212	'	'
Distributions	'	'	'	'	'	'	'	'	-639	'	'
Redemption and buyout of noncontrolling interests, net	'	'	'	'	'	'	'	'	-1,639	'	'
Ending Balance	5,498	'	'	'	'	'	'	'	5,498	'	'
Noncontrolling Interests [Member]	'	'	'	'	'	'	'	'	'	'	'
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Beginning Balance	'	'	'	95,831	'	'	'	'	95,831	'	'
Net income	'	'	'	'	'	'	'	'	4,002	'	'
Unrealized change from cash flow hedging derivatives	'	'	'	'	'	'	'	'	354	'	'
Contributions of noncontrolling interests	'	'	'	'	'	'	'	'	212	1,053	28,065
Distributions	'	'	'	'	'	'	'	'	-5,446	-8,617	'
Redemption and buyout of noncontrolling interests, net	'	'	'	'	'	'	'	'	-3,047	'	'
Ending Balance	$91,906	'	'	'	$95,831	'	'	'	$91,906	$95,831	'

Stockholders_Equity_Details

Stockholders' Equity (Details) (Class E [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Oct. 23, 2009
Class E [Member]	'	'	'
Stockholders Equity Note Disclosure [Line Items]	'	'	'
Common stock, shares authorized value	'	'	$237,500,000
Shares redeemed	10,000,000	9,200,000	'
Value of common stock shares redeemed	68,400,000	64,800,000	'
Stock redemption additional authorized amount	$32,800,000	$25,000,000	'

Stockholders_Equity_Informatio

Stockholders' Equity (Information of Share Transactions) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	176,006,755	[1]	178,127,559	[1]	'		'
Class E [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	178,090,434		182,331,000		182,717,000		'
Balance, Shares	171,254,036		178,090,434		182,331,000		182,717,000
Proceeds from sale and payments for repurchase of shares	$1,728,146	[2]	$1,775,196	[2]	$1,802,965	[2]	$1,806,652	[2]
Class E [Member] | Shares Sold [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares sold	'		65,000		'		'
Proceeds from sale and payments for repurchase of shares	'		317	[2]	'		'
Class E [Member] | Distribution Reinvestment Plan [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares issued	3,143,000		4,610,000		5,274,000		'
Proceeds from sale and payments for repurchase of shares	21,352	[2]	34,449	[2]	43,540	[2]	'
Class E [Member] | Conversion of OP Units to Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Conversion of OP Units to common stock (in shares)	'		269,000		118,000		'
Proceeds from sale and payments for repurchase of shares	'		2,273	[2]	978	[2]	'
Class E [Member] | Redemptions of Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Redemptions of common stock (in shares)	-9,981,000		-9,183,000		-5,778,000		'
Proceeds from sale and payments for repurchase of shares	-68,402	[2]	-64,808	[2]	-48,205	[2]	'
Class A [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	12,375		'		'		'
Balance, Shares	216,745		12,375		'		'
Proceeds from sale and payments for repurchase of shares	1,534	[2]	83	[2]	'		'
Class A [Member] | Shares Sold [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares sold	205,000		12,000		'		'
Proceeds from sale and payments for repurchase of shares	1,451	[2]	83	[2]	'		'
Class W [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	12,375		'		'		'
Balance, Shares	208,889		12,375		'		'
Proceeds from sale and payments for repurchase of shares	1,437	[2]	83	[2]	'		'
Class W [Member] | Shares Sold [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares sold	197,000		12,000		'		'
Proceeds from sale and payments for repurchase of shares	1,354	[2]	83	[2]	'		'
Class I [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	12,375		'		'		'
Balance, Shares	4,327,085		12,375		'		'
Proceeds from sale and payments for repurchase of shares	29,507	[2]	83	[2]	'		'
Class I [Member] | Shares Sold [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares sold	4,301,000		12,000		'		'
Proceeds from sale and payments for repurchase of shares	29,333	[2]	83	[2]	'		'
Class I [Member] | Distribution Reinvestment Plan [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares issued	18,000		'		'		'
Proceeds from sale and payments for repurchase of shares	121	[2]	'		'		'
Class I [Member] | Redemptions of Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Redemptions of common stock (in shares)	-4,000		'		'		'
Proceeds from sale and payments for repurchase of shares	-30	[2]	'		'		'
Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Balance, Shares	178,128,000		182,331,000		182,717,000		'
Shares issued	7,864,000		4,711,000		5,274,000		'
Conversion of OP Units to common stock (in shares)	'		269,000		118,000		'
Redemptions of common stock (in shares)	-9,985,000		-9,183,000		-5,778,000		'
Balance, Shares	176,007,000		178,128,000		182,331,000		182,717,000
Proceeds from sale and payments for repurchase of shares	1,760,624	[2]	1,775,445	[2]	1,802,965	[2]	1,806,652	[2]
Common Stock [Member] | Shares Sold [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares sold	4,703,000		101,000		'		'
Proceeds from sale and payments for repurchase of shares	32,138	[2]	566	[2]	'		'
Common Stock [Member] | Distribution Reinvestment Plan [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Shares issued	3,161,000		4,610,000		5,274,000		'
Proceeds from sale and payments for repurchase of shares	21,473	[2]	34,449	[2]	43,540	[2]	'
Common Stock [Member] | Conversion of OP Units to Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Conversion of OP Units to common stock (in shares)	'		269,000		118,000		'
Proceeds from sale and payments for repurchase of shares	'		2,273	[2]	978	[2]	'
Common Stock [Member] | Redemptions of Common Stock [Member]	'		'		'		'
Shareholders Equity [Line Items]	'		'		'		'
Redemptions of common stock (in shares)	-9,985,000		-9,183,000		-5,778,000		'
Proceeds from sale and payments for repurchase of shares	($68,432)	[2]	($64,808)	[2]	($48,205)	[2]	'
[1]	Includes 171,254,036 shares of Class E common stock, 216,745 shares of ClassB A common stock, 208,889 shares of Class W common stock, and 4,327,085 shares of Class I common stock issued and outstanding as of December 31, 2013, and 178,090,434 shares of Class E common stock, 12,375 shares of ClassB A common stock, 12,375B shares of Class W common stock, and 12,375 shares of Class I common stock issued and outstanding as of DecemberB 31, 2012.
[2]	Dollar amounts presented in this table represent the gross amount of proceeds from the sale of common shares, or the amount paid to stockholders to redeem common shares, and do not include other costs and expenses accounted for within additional paid-in capital, such as selling commissions, dealer manager and distribution fees, offering and organizational costs, and other costs associated with our distribution reinvestment plans and share redemption programs.

Stockholders_Equity_Total_Dist

Stockholders' Equity (Total Distributions Declared and Portion of Each Contribution Paid in Cash and Reinvested) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity [Abstract]	'	'	'
Paid in cash	$41,123	$53,311	$62,575
Reinvested in shares	21,207	30,948	43,129
Total distributions	$62,330	$84,259	$105,704
Paid in cash	66.00%	63.30%	59.20%
Reinvested in shares	34.00%	36.70%	40.80%
Total	100.00%	100.00%	100.00%

Stockholders_Equity_Distributi

Stockholders' Equity (Distributions Paid and/or Authorized) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
1st Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Payment Date	16-Apr-12
2nd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Payment Date	24-Jul-12
3rd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Payment Date	16-Oct-12
4th Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Payment Date	16-Jan-13
1st Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Payment Date	16-Apr-13
2nd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Payment Date	16-Jul-13
3rd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Payment Date	16-Oct-13
4th Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Payment Date	16-Jan-14
1st Quarter Twenty 2014 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1],[2]
Payment Date	16-Apr-14	[2],[3]
Class E [Member] | 1st Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Class E [Member] | 2nd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Class E [Member] | 3rd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.13	[1]
Class E [Member] | 4th Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class E [Member] | 1st Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class E [Member] | 2nd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class E [Member] | 3rd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class E [Member] | 4th Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class E [Member] | 1st Quarter Twenty 2014 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1],[2]
Class A [Member] | 3rd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class A [Member] | 4th Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.07	[1]
Class A [Member] | 1st Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.07	[1]
Class A [Member] | 2nd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.07	[1]
Class A [Member] | 3rd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.07	[1]
Class A [Member] | 4th Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.07	[1]
Class A [Member] | 1st Quarter Twenty 2014 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1],[2]
Class W [Member] | 3rd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.10	[1]
Class W [Member] | 4th Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.08	[1]
Class W [Member] | 1st Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.08	[1]
Class W [Member] | 2nd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.08	[1]
Class W [Member] | 3rd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.08	[1]
Class W [Member] | 4th Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.08	[1]
Class W [Member] | 1st Quarter Twenty 2014 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1],[2]
Class I [Member] | 3rd Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.11	[1]
Class I [Member] | 4th Quarter 2012 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class I [Member] | 1st Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class I [Member] | 2nd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class I [Member] | 3rd Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class I [Member] | 4th Quarter 2013 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1]
Class I [Member] | 1st Quarter Twenty 2014 [Member]	'
Dividends [Line Items]	'
Distributions declared per common share	$0.09	[1],[2]
[1]	Assumes ownership of share or unit for the entire quarter.
[2]	The distribution amount herein for the first quarter of 2014 does not reflect class-specific adjustments made to our ClassB A, Class W, and Class I shares, which have not yet been determined.
[3]	Expected payment date.

Stockholders_Equity_Summary_of

Stockholders' Equity (Summary of Information Regarding Taxability of Distributions on Common Shares) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity [Abstract]	'	'	'
Ordinary income	$0.11	$0.01	$0.19
Non-taxable return of capital	$0.15	$0.45	$0.39
Total	$0.26	$0.46	$0.58
Ordinary income	40.98%	1.49%	32.53%
Non-taxable return of capital	59.02%	98.51%	67.47%
Total	100.00%	100.00%	100.00%

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (USD $)

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Jul. 21, 2012

Jul. 21, 2012

Dec. 31, 2013

Dec. 31, 2013

Jul. 21, 2012

item

Fund Core Finance Group, LLC [Member]

Hudson River Partners Real Estate Investment Management LP [Member]

BCG TRT Advisors LLC [Member]

BCG TRT Advisors LLC [Member]

Direct Real Properties [Member]

Product Specialist Real Properties [Member]

Operational Stage [Member]

Debt Related Investments [Member]

Debt Related Investments [Member]

Maximum [Member]

Maximum [Member]

Development Or Construction Stage [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount owed to Advisor

$1,600,000

$1,400,000

'

'

'

'

'

'

'

'

'

'

'

Component of Advisory fee as a percent of Operating Partnership NAV

1.15%

'

'

'

'

'

'

'

'

'

'

'

'

Component of Advisory fee as a percent of the overall return

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of return not payable to the Advisor

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

Class E Dealer Manager fee portion waived under NAV per share threshold

$10

'

'

'

'

'

'

'

'

'

'

'

'

Maximum annual Advisory fee performance condition as a percentage of the overall return

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

Advisor development management fee

4.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Advisor real property disposition fee as a percentage of the sales price of real property assets

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

Fee payable to the Advisor as a percentage of the sales price of real property assets

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum percentage of reasonable customary and commission payable to Advisor upon disposition of a property

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum commissions payable as a percent of the sales price of the property sold

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Advisor reimbursement of cumulative organization and offering costs as a percentage of gross proceeds from the Offering

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

Class A Dealer Manager selling commission

3.00%

'

'

'

'

'

'

'

'

'

'

'

'

Class A and Class W Dealer Manager fee

0.60%

'

'

'

'

'

'

'

'

'

'

'

'

Class I Dealer Manager fee

0.10%

'

'

'

'

'

'

'

'

'

'

'

'

Class A distribution fee

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Dealer Manager and Distribution fees as a percent of gross proceeds from NAV Offering

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum primary dealer fee as percentage of gross proceeds from sale of class I shares

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

Class I shares sale transaction date

31-Jul-13

'

'

'

'

'

'

'

'

'

'

'

'

Total gross proceeds raised from sale of class I shares

30,917,000

567,000

'

'

'

'

'

'

'

'

'

300,000,000

'

Percentage of gross proceeds retained by dealer manager

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of acquisition fee payable to Advisor

'

'

'

'

'

'

'

'

1.00%

1.00%

'

'

4.00%

Asset management fee as a percentage of aggregate cost

'

'

'

'

'

'

0.50%

0.50%

'

'

'

'

'

Asset management fee as a percentage of net operating income

'

'

'

'

'

'

6.00%

6.00%

'

'

'

'

'

Asset management fee as a percentage of aggregate cost

'

'

'

'

'

'

0.75%

'

'

'

'

'

'

Asset management fees as percentage of amount invested in debt related assets

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

Asset management fee

'

'

'

'

58,000

25,000

'

'

'

'

'

'

'

Maximum level of business acquisition and asset management amount

'

'

130,000,000

20,000,000

'

'

'

'

'

'

'

'

'

Debt investment advisory fees as a percentage of debt investment amount

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

Maximum debt investment advisory fees as percentage of debt investment amount

1.50%

'

'

'

'

'

'

'

'

'

'

'

'

Debt Investment advisory fees discount rate percentage applied

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

Debt investment advisory fees as percentage of discounted present value of debt investment amount

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

Debt investment advisory fees initial term

'4 years

'

'

'

'

'

'

'

'

'

'

'

'

Maximum level of total acquisition fee and acquisition expenses

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

Debt investment asset management fees minimum percentage of net debt investment amount

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

Debt investment asset management fees after initial term as percentage of debt investment amount

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

Number of debt related investments acquired during period

'

1

'

'

'

'

'

'

'

'

'

'

'

Debt related investments acquired during period

'

22,500,000

'

'

'

'

'

'

'

'

'

'

'

Acquisition fees paid to advisor

'

$619,000

'

'

'

'

'

'

'

'

'

'

'

Related_Party_Transactions_Sum

Related Party Transactions (Summary of Fees and Other Amounts Earned by Advisor and Its Related Parties) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]	'	'	'
Total	$25,631	$22,680	$24,611
Acquisition Fees [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	'	1,534	218
Asset Management And Advisory Fees [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	15,120	17,659	20,854
Development Management Fees [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	223	133	'
Other Reimbursements [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	6,234	3,253	1,940
Asset Management Fees Related to Disposition of Real Properties [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	2,639	101	1,599
Dealer Manager and Distribution Fees [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Total	$1,415	'	'

Net_Income_Loss_Per_Common_Sha2

Net Income (Loss) Per Common Share (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Numerator

'

'

'

'

'

'

'

'

'

'

'

Loss from continuing operations

($6,964)

($72)

($297)

($1,751)

($2,626)

($1,601)

($5,676)

($5,058)

($9,084)

($14,961)

($43,056)

Loss from continuing operations attributable to noncontrolling interests

'

'

'

'

'

'

'

'

558

1,081

2,997

Loss from continuing operations attributable to common stockholders

'

'

'

'

'

'

'

'

-8,526

-13,880

-40,059

Dilutive noncontrolling interests share of loss from continuing operations

'

'

'

'

'

'

'

'

-652

-1,160

-2,959

Numerator for diluted earnings per share - adjusted loss from continuing operations

'

'

'

'

'

'

'

'

-9,178

-15,040

-43,018

Income (loss) from discontinued operations

5,512

45,403

18,754

-4,115

-12,778

13,545

-3,896

-4,281

65,554

[1]

-7,410

[1]

-21,510

[1],[2]

(Income) loss from discontinued operations attributable to noncontrolling interests

'

'

'

'

'

'

'

'

-4,560

-971

3,889

Income (loss) from discontinued operations attributable to common stockholders

'

'

'

'

'

'

'

'

60,994

-8,381

-17,621

Dilutive noncontrolling interests share of income (loss) from discontinued operations

'

'

'

'

'

'

'

'

4,662

-701

-1,301

Numerator for diluted earnings per share - adjusted income (loss) from discontinued operations

'

'

'

'

'

'

'

'

$65,656

($9,082)

($18,922)

Denominator

'

'

'

'

'

'

'

'

'

'

'

Weighted average shares outstanding-basic

'

'

'

'

'

'

'

'

178,196

181,982

183,813

Incremental weighted average shares effect of conversion of OP units

'

'

'

'

'

'

'

'

13,736

15,262

13,564

Weighted average shares outstanding-diluted

'

'

'

'

'

'

'

'

191,932

197,244

197,377

INCOME (LOSS) PER COMMON SHARE-BASIC AND DILUTED

'

'

'

'

'

'

'

'

'

'

'

Net loss from continuing operations

($0.04)

$0

$0

($0.01)

($0.01)

($0.01)

($0.03)

($0.03)

($0.05)

($0.08)

($0.22)

Net income (loss) from discontinued operations

$0.02

$0.24

$0.10

($0.02)

($0.06)

$0.06

($0.02)

($0.02)

$0.34

($0.04)

($0.09)

Net income (loss)

($0.02)

$0.24

$0.10

($0.03)

($0.07)

$0.05

($0.05)

($0.05)

$0.29

($0.12)

($0.31)

[1]

Includes approximately $2.6 million, $101,000, and $1.6 million paid to our Advisor for fees associated with the disposition of real properties during the years ended DecemberB 31, 2013, 2012, and 2011, respectively.

[2]

Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

Segment_Information_Revenue_an

Segment Information (Revenue and Components of Net Operating Income) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

segment

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Number of operating segments

'

'

'

'

'

'

'

'

4

'

'

Revenues

$56,170

$54,422

$53,814

$53,371

$54,838

$54,609

$53,041

$53,837

$217,777

$216,325

$218,857

Net operating income

'

'

'

'

'

'

'

'

174,105

175,790

177,059

Real Property [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Number of operating segments

'

'

'

'

'

'

'

'

3

'

'

Real Property [Member] | Office [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

123,838

[1]

122,264

[1]

124,438

[1]

Net operating income

'

'

'

'

'

'

'

'

95,618

[1]

95,625

[1]

97,551

[1]

Real Property [Member] | Industrial [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

26,108

[2]

26,715

[2]

26,305

[2]

Net operating income

'

'

'

'

'

'

'

'

23,893

[2]

24,782

[2]

24,416

[2]

Real Property [Member] | Retail [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

57,382

57,937

57,007

Net operating income

'

'

'

'

'

'

'

'

44,145

45,974

43,985

Debt Related Investments [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Number of operating segments

'

'

'

'

'

'

'

'

1

'

'

Revenues

'

'

'

'

'

'

'

'

10,449

9,409

11,107

Net operating income

'

'

'

'

'

'

'

'

10,449

9,409

11,107

Reclassified Properties from Office Segment to Industrial Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

13,000

'

'

'

13,700

'

'

'

'

'

13,600

Net operating income

$11,600

'

'

'

$12,500

'

'

'

'

'

$12,400

Number of Real Estate Properties

4

'

'

'

4

'

'

'

4

4

'

[1]

Excludes results of operations of real properties categorized as discontinued operations.

[2]

Amounts reported for our industrial segment for the years ended December 31, 2013, 2012 and 2011 include revenue of approximately $13.0 million, $13.7 million, and $13.6 million, respectively, and NOI of approximately $11.6 million, $12.5 million, and $12.4 million, respectively, relating to four properties that we reclassified from our office segment into our industrial segment during 2013.

Segment_Information_Reconcilia

Segment Information (Reconciliation of Net Operating Income to Reported Net Income (Loss)) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Reconciliation of net operating income attributable to common shareholders

'

'

'

'

'

'

'

'

'

'

'

Net operating income

'

'

'

'

'

'

'

'

$174,105

$175,790

$177,059

Interest and other income (expense)

'

'

'

'

'

'

'

'

-153

807

2,394

Real estate depreciation and amortization expense

'

'

'

'

'

'

'

'

-87,174

-91,127

-93,407

General and administrative expenses

'

'

'

'

'

'

'

'

-9,973

-7,229

-6,826

Advisory fees, related party

'

'

'

'

'

'

'

'

-15,120

-17,659

-20,854

Acquisition-related expenses

'

'

'

'

'

'

'

'

-337

[1]

-325

[1]

-610

[1]

Interest expense

'

'

'

'

'

'

'

'

-65,325

-69,844

-74,406

Impairment of real estate property

'

'

'

'

'

'

'

'

-2,600

-5,700

-23,500

Loss on extinguishment of debt and financing commitments

'

'

'

'

'

'

'

'

-2,507

-5,374

'

Other-than-temporary impairment on securities

'

'

'

'

'

'

'

'

0

0

-3,369

Provision for loss on debt related investments

'

'

'

'

'

'

'

'

'

'

-23,037

Discontinued operations, net of taxes

5,512

45,403

18,754

-4,115

-12,778

13,545

-3,896

-4,281

65,554

[2]

-7,410

[2]

-21,510

[2],[3]

Net (income) loss attributable to noncontrolling interests

85

-3,257

-1,329

499

1,240

-2,680

701

849

-4,002

110

6,886

NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS

($1,367)

$42,074

$17,128

($5,367)

($14,164)

$9,264

($8,871)

($8,490)

$52,468

($22,261)

($57,680)

[1]

Includes approximately $218,000 paid to our Advisor for the year ended December 31, 2011. We did not pay any acquisition fees to our Advisor during the years ended December 31, 2013 and 2012.

[2]

Includes approximately $2.6 million, $101,000, and $1.6 million paid to our Advisor for fees associated with the disposition of real properties during the years ended DecemberB 31, 2013, 2012, and 2011, respectively.

[3]

Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

Segment_Information_Schedule_o

Segment Information (Schedule of Total Assets by Business Segment) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Segment assets:	'		'		'	'
Net investments in real property	$1,924,642	[1]	$2,336,768	[1]	'	'
Debt related investments, net	123,935		187,321		92,247	'
Total segment assets, net	2,048,577		2,524,089		'	'
Non-segment assets:	'		'		'	'
Cash and cash equivalents	24,778		36,872		128,447	83,559
Other non-segment assets	85,878	[2]	98,293	[2]	'	'
Assets held for sale	146,176	[3]	'		'	'
Total Assets	2,305,409		2,659,254		'	'
Office [Member]	'		'		'	'
Segment assets:	'		'		'	'
Net investments in real property	1,092,351		1,245,346		'	'
Industrial [Member]	'		'		'	'
Segment assets:	'		'		'	'
Net investments in real property	229,786	[4]	475,525	[4]	'	'
Retail [Member]	'		'		'	'
Segment assets:	'		'		'	'
Net investments in real property	602,505		615,897		'	'
Debt Related Investments [Member]	'		'		'	'
Segment assets:	'		'		'	'
Debt related investments, net	123,935		187,321		'	'
Reclassified Properties from Office Segment to Industrial Segment [Member]	'		'		'	'
Segment assets:	'		'		'	'
Net investments in real property	$117,900		$125,000		'	'
[1]	Includes approximately $82.4 million and $520.3 million, after accumulated depreciation and amortization, in consolidated real property variable interest entity investments as of December 31, 2013 and 2012, respectively. (2)Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.
[2]	Other non-segment assets primarily consist of corporate assets including restricted cash and receivables, including straight-line rent receivable.
[3]	Includes approximately $143.0 million, after accumulated depreciation and amortization, in consolidated real property variable interest investments as of December 31, 2013.
[4]	Amounts reported for our industrial segment as of December 31, 2013 and December 31, 2012 include net investments in real property of approximately $117.9 million and $125.0 million, respectively, relating to properties that we had previously classified within our office segment.

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax [Line Items]	'	'
Percentage of REIT taxable income distributed annually	100.00%	'
Gross deferred tax assets	$4.40	$4
Minimum [Member]	'	'
Income Tax [Line Items]	'	'
Percentage of REIT taxable income distributed annually	90.00%	'

Quarterly_Financial_Data_Detai

Quarterly Financial Data (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Quarterly Financial Data (Unaudited) [Abstract]	'	'	'	'	'	'	'	'	'		'		'
Rental revenue	$53,380	$52,113	$51,199	$50,636	$52,091	$51,590	$51,282	$51,953	$207,328		$206,916		$207,750
Debt related income	2,790	2,309	2,615	2,735	2,747	3,019	1,759	1,884	10,449		9,409		11,107
Total revenue	56,170	54,422	53,814	53,371	54,838	54,609	53,041	53,837	217,777		216,325		218,857
Total operating expenses	-44,985	-38,180	-37,512	-38,199	-38,775	-38,812	-38,900	-40,388	-158,876		-156,875		-189,901
Other income (expenses)	-18,149	-16,314	-16,599	-16,923	-18,689	-17,398	-19,817	-18,507	-67,985		-74,411		'
Loss from continuing operations	-6,964	-72	-297	-1,751	-2,626	-1,601	-5,676	-5,058	-9,084		-14,961		-43,056
Discontinued operations, net of taxes	5,512	45,403	18,754	-4,115	-12,778	13,545	-3,896	-4,281	65,554	[1]	-7,410	[1]	-21,510	[1],[2]
Net income (loss)	-1,452	45,331	18,457	-5,866	-15,404	11,944	-9,572	-9,339	56,470		-22,371		-64,566
Net (income) loss attributable to noncontrolling interests	85	-3,257	-1,329	499	1,240	-2,680	701	849	-4,002		110		6,886
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	($1,367)	$42,074	$17,128	($5,367)	($14,164)	$9,264	($8,871)	($8,490)	$52,468		($22,261)		($57,680)
Net loss per basic and diluted common share	'	'	'	'	'	'	'	'	'		'		'
Continuing operations	($0.04)	$0	$0	($0.01)	($0.01)	($0.01)	($0.03)	($0.03)	($0.05)		($0.08)		($0.22)
Discontinued operations	$0.02	$0.24	$0.10	($0.02)	($0.06)	$0.06	($0.02)	($0.02)	$0.34		($0.04)		($0.09)
NET LOSS PER BASIC AND DILUTED COMMON SHARE	($0.02)	$0.24	$0.10	($0.03)	($0.07)	$0.05	($0.05)	($0.05)	$0.29		($0.12)		($0.31)
[1]	Includes approximately $2.6 million, $101,000, and $1.6 million paid to our Advisor for fees associated with the disposition of real properties during the years ended DecemberB 31, 2013, 2012, and 2011, respectively.
[2]	Gain on disposition, net of taxes for the year ended December 31, 2011, includes profit participation related to a property that we sold during the year ended December 31, 2010, of approximately $2.9 million.

Subsequent_Events_Narrative_De

Subsequent Events (Narrative) (Details) (USD $)	12 Months Ended	1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Jan. 22, 2014	Dec. 31, 2013
	property	Industrial [Member]	Office Property; Chicago, IL Market [Member]
	sqft	Subsequent Event [Member]	Subsequent Event [Member]
		property
		sqft
Subsequent Event [Line Items]	'	'	'
Date of acquisition or disposal	'	'	22-Jan-14
Number of properties sold	12	12	'
Rentable square feet	3,360,000	3,400,000	'
Basis in property	'	'	$139.90
Total sales price	'	'	$175

Schedule_III_Real_Estate_and_A1

Schedule III - Real Estate and Accumulated Depreciation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
	property
Real Estate and Accumulated Depreciation [Line Items]	'
Number of Buildings	97
Encumbrances	$977,007,000	[1]
Initial Cost to Company, Land	508,984,000
Initial Cost to Company, Building & Improvements	1,998,890,000	[2]
Initial Cost to Company, Total	2,507,874,000
Cost Capitalized or Adjustments Subsequent to Acquisition	62,453,000	[3]
Gross Amount Carried, Land	511,013,000
Gross Amount Carried, Building and Improvements	2,059,467,000	[2]
Gross Amount Carried, Total Costs	2,570,480,000	[3],[4]
Accumulated Depreciation	502,847,000	[3]
Aggregate cost of investments in real property for federal income tax purposes	2,200,000,000
Office [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Number of Buildings	37
Encumbrances	499,209,000	[1]
Initial Cost to Company, Land	226,916,000
Initial Cost to Company, Building & Improvements	1,097,514,000	[2]
Initial Cost to Company, Total	1,324,430,000
Cost Capitalized or Adjustments Subsequent to Acquisition	37,302,000	[3]
Gross Amount Carried, Land	226,916,000
Gross Amount Carried, Building and Improvements	1,134,816,000	[2]
Gross Amount Carried, Total Costs	1,361,732,000	[3],[4]
Accumulated Depreciation	274,732,000	[3]
Office [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Silicon Valley, CA
Number of Buildings	3
Encumbrances	23,500,000	[1]
Initial Cost to Company, Land	13,859,000
Initial Cost to Company, Building & Improvements	21,974,000	[2]
Initial Cost to Company, Total	35,833,000
Cost Capitalized or Adjustments Subsequent to Acquisition	4,063,000	[3]
Gross Amount Carried, Land	13,859,000
Gross Amount Carried, Building and Improvements	26,037,000	[2]
Gross Amount Carried, Total Costs	39,896,000	[3],[4]
Accumulated Depreciation	7,139,000	[3]
Acquisition Date	28-Jun-06
Office [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Philadelphia, PA
Number of Buildings	1
Encumbrances	24,000,000	[1]
Initial Cost to Company, Land	10,115,000
Initial Cost to Company, Building & Improvements	27,516,000	[2]
Initial Cost to Company, Total	37,631,000
Cost Capitalized or Adjustments Subsequent to Acquisition	3,418,000	[3]
Gross Amount Carried, Land	10,115,000
Gross Amount Carried, Building and Improvements	30,934,000	[2]
Gross Amount Carried, Total Costs	41,049,000	[3],[4]
Accumulated Depreciation	10,430,000	[3]
Acquisition Date	28-Aug-06
Office [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Chicago, IL
Number of Buildings	1
Encumbrances	8,580,000	[1]
Initial Cost to Company, Land	2,611,000
Initial Cost to Company, Building & Improvements	7,797,000	[2]
Initial Cost to Company, Total	10,408,000
Cost Capitalized or Adjustments Subsequent to Acquisition	5,163,000	[3]
Gross Amount Carried, Land	2,611,000
Gross Amount Carried, Building and Improvements	12,960,000	[2]
Gross Amount Carried, Total Costs	15,571,000	[3],[4]
Accumulated Depreciation	5,767,000	[3]
Acquisition Date	24-Jan-07
Office [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Chicago, IL
Number of Buildings	10
Encumbrances	21,300,000	[1]
Initial Cost to Company, Land	9,019,000
Initial Cost to Company, Building & Improvements	16,622,000	[2]
Initial Cost to Company, Total	25,641,000
Cost Capitalized or Adjustments Subsequent to Acquisition	4,634,000	[3]
Gross Amount Carried, Land	9,019,000
Gross Amount Carried, Building and Improvements	21,256,000	[2]
Gross Amount Carried, Total Costs	30,275,000	[3],[4]
Accumulated Depreciation	8,402,000	[3]
Acquisition Date	1-Feb-07
Office [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Little Rock, AR
Number of Buildings	1
Encumbrances	13,650,000	[1]
Initial Cost to Company, Land	2,900,000
Initial Cost to Company, Building & Improvements	18,792,000	[2]
Initial Cost to Company, Total	21,692,000
Cost Capitalized or Adjustments Subsequent to Acquisition	323,000	[3]
Gross Amount Carried, Land	2,900,000
Gross Amount Carried, Building and Improvements	19,115,000	[2]
Gross Amount Carried, Total Costs	22,015,000	[3],[4]
Accumulated Depreciation	4,523,000	[3]
Acquisition Date	20-Mar-07
Office [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Fayetteville, AR
Number of Buildings	1
Initial Cost to Company, Land	2,699,000
Initial Cost to Company, Building & Improvements	8,996,000	[2]
Initial Cost to Company, Total	11,695,000
Gross Amount Carried, Land	2,699,000
Gross Amount Carried, Building and Improvements	8,996,000	[2]
Gross Amount Carried, Total Costs	11,695,000	[3],[4]
Accumulated Depreciation	2,188,000	[3]
Acquisition Date	28-Sep-07
Office [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Silicon Valley, CA
Number of Buildings	1
Encumbrances	7,498,000	[1]
Initial Cost to Company, Land	5,841,000
Initial Cost to Company, Building & Improvements	13,861,000	[2]
Initial Cost to Company, Total	19,702,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,038,000	[3]
Gross Amount Carried, Land	5,841,000
Gross Amount Carried, Building and Improvements	14,899,000	[2]
Gross Amount Carried, Total Costs	20,740,000	[3],[4]
Accumulated Depreciation	5,318,000	[3]
Acquisition Date	21-Nov-07
Office [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Minneapolis/St Paul, MN
Number of Buildings	1
Initial Cost to Company, Land	3,538,000
Initial Cost to Company, Building & Improvements	25,865,000	[2]
Initial Cost to Company, Total	29,403,000
Cost Capitalized or Adjustments Subsequent to Acquisition	38,000	[3]
Gross Amount Carried, Land	3,538,000
Gross Amount Carried, Building and Improvements	25,903,000	[2]
Gross Amount Carried, Total Costs	29,441,000	[3],[4]
Accumulated Depreciation	4,908,000	[3]
Acquisition Date	3-Oct-08
Office [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Austin, TX
Number of Buildings	1
Encumbrances	19,786,000	[1]
Initial Cost to Company, Land	2,663,000
Initial Cost to Company, Building & Improvements	42,315,000	[2]
Initial Cost to Company, Total	44,978,000
Gross Amount Carried, Land	2,663,000
Gross Amount Carried, Building and Improvements	42,315,000	[2]
Gross Amount Carried, Total Costs	44,978,000	[3],[4]
Accumulated Depreciation	8,108,000	[3]
Acquisition Date	23-Dec-08
Office [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Washington, DC
Number of Buildings	1
Encumbrances	46,421,000	[1]
Initial Cost to Company, Land	25,177,000
Initial Cost to Company, Building & Improvements	41,250,000	[2]
Initial Cost to Company, Total	66,427,000
Cost Capitalized or Adjustments Subsequent to Acquisition	2,928,000	[3]
Gross Amount Carried, Land	25,177,000
Gross Amount Carried, Building and Improvements	44,178,000	[2]
Gross Amount Carried, Total Costs	69,355,000	[3],[4]
Accumulated Depreciation	14,373,000	[3]
Acquisition Date	10-Mar-09
Office [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Princeton, NJ
Number of Buildings	1
Encumbrances	34,227,000	[1]
Initial Cost to Company, Land	5,302,000
Initial Cost to Company, Building & Improvements	45,773,000	[2]
Initial Cost to Company, Total	51,075,000
Cost Capitalized or Adjustments Subsequent to Acquisition	88,000	[3]
Gross Amount Carried, Land	5,302,000
Gross Amount Carried, Building and Improvements	45,861,000	[2]
Gross Amount Carried, Total Costs	51,163,000	[3],[4]
Accumulated Depreciation	7,690,000	[3]
Acquisition Date	3-Nov-09
Office [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Encumbrances	22,807,000	[1]
Initial Cost to Company, Land	7,500,000
Initial Cost to Company, Building & Improvements	22,303,000	[2]
Initial Cost to Company, Total	29,803,000
Cost Capitalized or Adjustments Subsequent to Acquisition	4,688,000	[3]
Gross Amount Carried, Land	7,500,000
Gross Amount Carried, Building and Improvements	26,991,000	[2]
Gross Amount Carried, Total Costs	34,491,000	[3],[4]
Accumulated Depreciation	7,746,000	[3]
Acquisition Date	16-Dec-09
Office [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Initial Cost to Company, Land	4,075,000
Initial Cost to Company, Building & Improvements	19,625,000	[2]
Initial Cost to Company, Total	23,700,000
Cost Capitalized or Adjustments Subsequent to Acquisition	5,383,000	[3]
Gross Amount Carried, Land	4,075,000
Gross Amount Carried, Building and Improvements	25,008,000	[2]
Gross Amount Carried, Total Costs	29,083,000	[3],[4]
Accumulated Depreciation	8,895,000	[3]
Acquisition Date	16-Dec-09
Office [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Los Angeles, CA
Number of Buildings	1
Encumbrances	10,243,000	[1]
Initial Cost to Company, Land	9,700,000
Initial Cost to Company, Building & Improvements	13,142,000	[2]
Initial Cost to Company, Total	22,842,000
Cost Capitalized or Adjustments Subsequent to Acquisition	410,000	[3]
Gross Amount Carried, Land	9,700,000
Gross Amount Carried, Building and Improvements	13,552,000	[2]
Gross Amount Carried, Total Costs	23,252,000	[3],[4]
Accumulated Depreciation	7,431,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Denver, CO
Number of Buildings	1
Initial Cost to Company, Land	3,925,000
Initial Cost to Company, Building & Improvements	8,607,000	[2]
Initial Cost to Company, Total	12,532,000
Cost Capitalized or Adjustments Subsequent to Acquisition	2,000	[3]
Gross Amount Carried, Land	3,925,000
Gross Amount Carried, Building and Improvements	8,609,000	[2]
Gross Amount Carried, Total Costs	12,534,000	[3],[4]
Accumulated Depreciation	6,072,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Los Angeles, CA
Number of Buildings	1
Encumbrances	8,907,000	[1]
Initial Cost to Company, Land	6,150,000
Initial Cost to Company, Building & Improvements	17,536,000	[2]
Initial Cost to Company, Total	23,686,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,000	[3]
Gross Amount Carried, Land	6,150,000
Gross Amount Carried, Building and Improvements	17,535,000	[2]
Gross Amount Carried, Total Costs	23,685,000	[3],[4]
Accumulated Depreciation	4,647,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Los Angeles, CA
Number of Buildings	1
Encumbrances	12,469,000	[1]
Initial Cost to Company, Land	6,700,000
Initial Cost to Company, Building & Improvements	21,303,000	[2]
Initial Cost to Company, Total	28,003,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,957,000	[3]
Gross Amount Carried, Land	6,700,000
Gross Amount Carried, Building and Improvements	23,260,000	[2]
Gross Amount Carried, Total Costs	29,960,000	[3],[4]
Accumulated Depreciation	11,238,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Northern New Jersey
Number of Buildings	1
Encumbrances	114,424,000	[1]
Initial Cost to Company, Land	16,800,000
Initial Cost to Company, Building & Improvements	193,742,000	[2]
Initial Cost to Company, Total	210,542,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,415,000	[3]
Gross Amount Carried, Land	16,800,000
Gross Amount Carried, Building and Improvements	195,157,000	[2]
Gross Amount Carried, Total Costs	211,957,000	[3],[4]
Accumulated Depreciation	42,153,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Washington, DC
Number of Buildings	1
Initial Cost to Company, Land	21,100,000
Initial Cost to Company, Building & Improvements	157,983,000	[2]
Initial Cost to Company, Total	179,083,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-5,000	[3]
Gross Amount Carried, Land	21,100,000
Gross Amount Carried, Building and Improvements	157,978,000	[2]
Gross Amount Carried, Total Costs	179,078,000	[3],[4]
Accumulated Depreciation	38,513,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Northern New Jersey
Number of Buildings	1
Encumbrances	16,344,000	[1]
Initial Cost to Company, Land	5,200,000
Initial Cost to Company, Building & Improvements	32,439,000	[2]
Initial Cost to Company, Total	37,639,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,000	[3]
Gross Amount Carried, Land	5,200,000
Gross Amount Carried, Building and Improvements	32,438,000	[2]
Gross Amount Carried, Total Costs	37,638,000	[3],[4]
Accumulated Depreciation	4,794,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Washington, DC
Number of Buildings	1
Encumbrances	13,984,000	[1]
Initial Cost to Company, Land	2,700,000
Initial Cost to Company, Building & Improvements	31,915,000	[2]
Initial Cost to Company, Total	34,615,000
Cost Capitalized or Adjustments Subsequent to Acquisition	36,000	[3]
Gross Amount Carried, Land	2,700,000
Gross Amount Carried, Building and Improvements	31,951,000	[2]
Gross Amount Carried, Total Costs	34,651,000	[3],[4]
Accumulated Depreciation	9,949,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'East Bay, CA
Number of Buildings	1
Initial Cost to Company, Land	2,500,000
Initial Cost to Company, Building & Improvements	3,562,000	[2]
Initial Cost to Company, Total	6,062,000
Cost Capitalized or Adjustments Subsequent to Acquisition	33,000	[3]
Gross Amount Carried, Land	2,500,000
Gross Amount Carried, Building and Improvements	3,595,000	[2]
Gross Amount Carried, Total Costs	6,095,000	[3],[4]
Accumulated Depreciation	3,416,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'East Bay, CA
Number of Buildings	1
Initial Cost to Company, Land	8,400,000
Initial Cost to Company, Building & Improvements	136,797,000	[2]
Initial Cost to Company, Total	145,197,000
Cost Capitalized or Adjustments Subsequent to Acquisition	45,000	[3]
Gross Amount Carried, Land	8,400,000
Gross Amount Carried, Building and Improvements	136,842,000	[2]
Gross Amount Carried, Total Costs	145,242,000	[3],[4]
Accumulated Depreciation	34,463,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Miami, FL
Number of Buildings	1
Encumbrances	19,372,000	[1]
Initial Cost to Company, Land	12,700,000
Initial Cost to Company, Building & Improvements	35,483,000	[2]
Initial Cost to Company, Total	48,183,000
Cost Capitalized or Adjustments Subsequent to Acquisition	49,000	[3]
Gross Amount Carried, Land	12,700,000
Gross Amount Carried, Building and Improvements	35,532,000	[2]
Gross Amount Carried, Total Costs	48,232,000	[3],[4]
Accumulated Depreciation	6,247,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Encumbrances	23,870,000	[1]
Initial Cost to Company, Land	3,110,000
Initial Cost to Company, Building & Improvements	50,121,000	[2]
Initial Cost to Company, Total	53,231,000
Cost Capitalized or Adjustments Subsequent to Acquisition	112,000	[3]
Gross Amount Carried, Land	3,110,000
Gross Amount Carried, Building and Improvements	50,233,000	[2]
Gross Amount Carried, Total Costs	53,343,000	[3],[4]
Accumulated Depreciation	9,233,000	[3]
Acquisition Date	25-Jun-10
Office [Member] | Real Estate Property Twenty Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'San Francisco, CA
Number of Buildings	1
Encumbrances	57,827,000	[1]
Initial Cost to Company, Land	32,632,000
Initial Cost to Company, Building & Improvements	82,195,000	[2]
Initial Cost to Company, Total	114,827,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,486,000	[3]
Gross Amount Carried, Land	32,632,000
Gross Amount Carried, Building and Improvements	83,681,000	[2]
Gross Amount Carried, Total Costs	116,313,000	[3],[4]
Accumulated Depreciation	1,089,000	[3]
Acquisition Date	7-Nov-13
Office [Member] | Minimum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Office [Member] | Minimum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Office [Member] | Minimum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'1 year
Office [Member] | Minimum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'2 years
Office [Member] | Minimum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Office [Member] | Minimum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Office [Member] | Minimum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Office [Member] | Minimum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'15 years
Office [Member] | Minimum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'11 years
Office [Member] | Minimum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Office [Member] | Minimum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Office [Member] | Minimum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Office [Member] | Minimum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Office [Member] | Minimum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Office [Member] | Minimum [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Office [Member] | Minimum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Office [Member] | Minimum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Office [Member] | Minimum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'7 years
Office [Member] | Minimum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'7 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'13 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'7 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'12 years
Office [Member] | Minimum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'9 years
Office [Member] | Maximum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'35 years
Office [Member] | Maximum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Office [Member] | Maximum [Member] | Real Estate Property Twenty Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Number of Buildings	29
Encumbrances	196,663,000	[1]
Initial Cost to Company, Land	52,543,000
Initial Cost to Company, Building & Improvements	409,379,000	[2]
Initial Cost to Company, Total	461,922,000
Cost Capitalized or Adjustments Subsequent to Acquisition	16,434,000	[4]
Gross Amount Carried, Land	51,678,000
Gross Amount Carried, Building and Improvements	426,678,000	[2]
Gross Amount Carried, Total Costs	478,356,000	[3],[4]
Accumulated Depreciation	105,578,000	[3]
Industrial [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Silicon Valley, CA
Number of Buildings	3
Encumbrances	14,250,000	[1]
Initial Cost to Company, Land	5,982,000
Initial Cost to Company, Building & Improvements	15,459,000	[2]
Initial Cost to Company, Total	21,441,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-2,542,000	[4]
Gross Amount Carried, Land	5,117,000
Gross Amount Carried, Building and Improvements	13,872,000	[2]
Gross Amount Carried, Total Costs	18,989,000	[3],[4]
Accumulated Depreciation	5,752,000	[3]
Acquisition Date	28-Sep-06
Industrial [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	3
Encumbrances	22,700,000	[1]
Initial Cost to Company, Land	5,162,000
Initial Cost to Company, Building & Improvements	30,192,000	[2]
Initial Cost to Company, Total	35,354,000
Cost Capitalized or Adjustments Subsequent to Acquisition	79,000	[4]
Gross Amount Carried, Land	5,162,000
Gross Amount Carried, Building and Improvements	30,271,000	[2]
Gross Amount Carried, Total Costs	35,433,000	[3],[4]
Accumulated Depreciation	9,389,000	[3]
Acquisition Date	21-Dec-06
Industrial [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Columbus, OH
Number of Buildings	1
Encumbrances	6,926,000	[1]
Initial Cost to Company, Land	1,249,000
Initial Cost to Company, Building & Improvements	13,308,000	[2]
Initial Cost to Company, Total	14,557,000
Cost Capitalized or Adjustments Subsequent to Acquisition	699,000	[4]
Gross Amount Carried, Land	1,249,000
Gross Amount Carried, Building and Improvements	14,007,000	[2]
Gross Amount Carried, Total Costs	15,256,000	[3],[4]
Accumulated Depreciation	4,562,000	[3]
Acquisition Date	16-Oct-06
Industrial [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Cincinnati, OH
Number of Buildings	1
Encumbrances	5,164,000	[1]
Initial Cost to Company, Land	1,653,000
Initial Cost to Company, Building & Improvements	9,597,000	[2]
Initial Cost to Company, Total	11,250,000
Cost Capitalized or Adjustments Subsequent to Acquisition	805,000	[4]
Gross Amount Carried, Land	1,653,000
Gross Amount Carried, Building and Improvements	10,402,000	[2]
Gross Amount Carried, Total Costs	12,055,000	[3],[4]
Accumulated Depreciation	3,872,000	[3]
Acquisition Date	16-Oct-06
Industrial [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Minneapolis/St Paul, MN
Number of Buildings	1
Encumbrances	4,298,000	[1]
Initial Cost to Company, Land	1,644,000
Initial Cost to Company, Building & Improvements	7,676,000	[2]
Initial Cost to Company, Total	9,320,000
Cost Capitalized or Adjustments Subsequent to Acquisition	392,000	[4]
Gross Amount Carried, Land	1,644,000
Gross Amount Carried, Building and Improvements	8,068,000	[2]
Gross Amount Carried, Total Costs	9,712,000	[3],[4]
Accumulated Depreciation	2,827,000	[3]
Acquisition Date	16-Oct-06
Industrial [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Cincinnati, OH
Number of Buildings	1
Encumbrances	3,587,000	[1]
Initial Cost to Company, Land	902,000
Initial Cost to Company, Building & Improvements	7,393,000	[2]
Initial Cost to Company, Total	8,295,000
Cost Capitalized or Adjustments Subsequent to Acquisition	333,000	[4]
Gross Amount Carried, Land	902,000
Gross Amount Carried, Building and Improvements	7,726,000	[2]
Gross Amount Carried, Total Costs	8,628,000	[3],[4]
Accumulated Depreciation	2,380,000	[3]
Acquisition Date	31-Oct-06
Industrial [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Minneapolis/St Paul, MN
Number of Buildings	1
Encumbrances	4,869,000	[1]
Initial Cost to Company, Land	1,910,000
Initial Cost to Company, Building & Improvements	8,474,000	[2]
Initial Cost to Company, Total	10,384,000
Cost Capitalized or Adjustments Subsequent to Acquisition	506,000	[4]
Gross Amount Carried, Land	1,910,000
Gross Amount Carried, Building and Improvements	8,980,000	[2]
Gross Amount Carried, Total Costs	10,890,000	[3],[4]
Accumulated Depreciation	2,801,000	[3]
Acquisition Date	31-Oct-06
Industrial [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Minneapolis/St Paul, MN
Number of Buildings	1
Encumbrances	6,091,000	[1]
Initial Cost to Company, Land	2,223,000
Initial Cost to Company, Building & Improvements	12,462,000	[2]
Initial Cost to Company, Total	14,685,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,107,000	[4]
Gross Amount Carried, Land	2,223,000
Gross Amount Carried, Building and Improvements	13,569,000	[2]
Gross Amount Carried, Total Costs	15,792,000	[3],[4]
Accumulated Depreciation	4,223,000	[3]
Acquisition Date	31-Oct-06
Industrial [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Indianapolis, IN
Number of Buildings	1
Encumbrances	12,000,000	[1]
Initial Cost to Company, Land	2,101,000
Initial Cost to Company, Building & Improvements	18,424,000	[2]
Initial Cost to Company, Total	20,525,000
Cost Capitalized or Adjustments Subsequent to Acquisition	2,469,000	[4]
Gross Amount Carried, Land	2,101,000
Gross Amount Carried, Building and Improvements	20,893,000	[2]
Gross Amount Carried, Total Costs	22,994,000	[3],[4]
Accumulated Depreciation	5,769,000	[3]
Acquisition Date	28-Mar-07
Industrial [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Encumbrances	4,625,000	[1]
Initial Cost to Company, Land	1,034,000
Initial Cost to Company, Building & Improvements	5,548,000	[2]
Initial Cost to Company, Total	6,582,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,186,000	[4]
Gross Amount Carried, Land	1,034,000
Gross Amount Carried, Building and Improvements	6,734,000	[2]
Gross Amount Carried, Total Costs	7,768,000	[3],[4]
Accumulated Depreciation	2,003,000	[3]
Acquisition Date	28-Mar-07
Industrial [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Encumbrances	18,375,000	[1]
Initial Cost to Company, Land	3,166,000
Initial Cost to Company, Building & Improvements	23,072,000	[2]
Initial Cost to Company, Total	26,238,000
Cost Capitalized or Adjustments Subsequent to Acquisition	5,137,000	[4]
Gross Amount Carried, Land	3,166,000
Gross Amount Carried, Building and Improvements	28,209,000	[2]
Gross Amount Carried, Total Costs	31,375,000	[3],[4]
Accumulated Depreciation	7,645,000	[3]
Acquisition Date	28-Mar-07
Industrial [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Columbus, OH
Number of Buildings	1
Encumbrances	4,725,000	[1]
Initial Cost to Company, Land	764,000
Initial Cost to Company, Building & Improvements	5,628,000	[2]
Initial Cost to Company, Total	6,392,000
Cost Capitalized or Adjustments Subsequent to Acquisition	18,000	[4]
Gross Amount Carried, Land	764,000
Gross Amount Carried, Building and Improvements	5,646,000	[2]
Gross Amount Carried, Total Costs	6,410,000	[3],[4]
Accumulated Depreciation	2,029,000	[3]
Acquisition Date	15-Jun-07
Industrial [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Atlanta, GA
Number of Buildings	1
Initial Cost to Company, Land	2,040,000
Initial Cost to Company, Building & Improvements	20,830,000	[2]
Initial Cost to Company, Total	22,870,000
Cost Capitalized or Adjustments Subsequent to Acquisition	402,000	[4]
Gross Amount Carried, Land	2,040,000
Gross Amount Carried, Building and Improvements	21,232,000	[2]
Gross Amount Carried, Total Costs	23,272,000	[3],[4]
Accumulated Depreciation	6,098,000	[3]
Acquisition Date	29-Oct-07
Industrial [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Central PA
Number of Buildings	1
Encumbrances	9,767,000	[1]
Initial Cost to Company, Land	2,376,000
Initial Cost to Company, Building & Improvements	27,081,000	[2]
Initial Cost to Company, Total	29,457,000
Cost Capitalized or Adjustments Subsequent to Acquisition	7,000	[4]
Gross Amount Carried, Land	2,376,000
Gross Amount Carried, Building and Improvements	27,088,000	[2]
Gross Amount Carried, Total Costs	29,464,000	[3],[4]
Accumulated Depreciation	6,417,000	[3]
Acquisition Date	9-Jan-08
Industrial [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Louisville, KY
Number of Buildings	1
Encumbrances	1,645,000	[1]
Initial Cost to Company, Land	751,000
Initial Cost to Company, Building & Improvements	4,131,000	[2]
Initial Cost to Company, Total	4,882,000
Cost Capitalized or Adjustments Subsequent to Acquisition	103,000	[4]
Gross Amount Carried, Land	751,000
Gross Amount Carried, Building and Improvements	4,234,000	[2]
Gross Amount Carried, Total Costs	4,985,000	[3],[4]
Accumulated Depreciation	981,000	[3]
Acquisition Date	17-Sep-08
Industrial [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Louisville, KY
Number of Buildings	1
Encumbrances	2,593,000	[1]
Initial Cost to Company, Land	1,124,000
Initial Cost to Company, Building & Improvements	6,821,000	[2]
Initial Cost to Company, Total	7,945,000
Cost Capitalized or Adjustments Subsequent to Acquisition	429,000	[4]
Gross Amount Carried, Land	1,124,000
Gross Amount Carried, Building and Improvements	7,250,000	[2]
Gross Amount Carried, Total Costs	8,374,000	[3],[4]
Accumulated Depreciation	1,971,000	[3]
Acquisition Date	17-Sep-08
Industrial [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Louisville, KY
Number of Buildings	1
Encumbrances	1,424,000	[1]
Initial Cost to Company, Land	672,000
Initial Cost to Company, Building & Improvements	3,862,000	[2]
Initial Cost to Company, Total	4,534,000
Cost Capitalized or Adjustments Subsequent to Acquisition	252,000	[4]
Gross Amount Carried, Land	672,000
Gross Amount Carried, Building and Improvements	4,114,000	[2]
Gross Amount Carried, Total Costs	4,786,000	[3],[4]
Accumulated Depreciation	1,254,000	[3]
Acquisition Date	17-Sep-08
Industrial [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Louisville, KY
Number of Buildings	1
Encumbrances	2,636,000	[1]
Initial Cost to Company, Land	1,130,000
Initial Cost to Company, Building & Improvements	6,614,000	[2]
Initial Cost to Company, Total	7,744,000
Cost Capitalized or Adjustments Subsequent to Acquisition	225,000	[4]
Gross Amount Carried, Land	1,130,000
Gross Amount Carried, Building and Improvements	6,839,000	[2]
Gross Amount Carried, Total Costs	7,969,000	[3],[4]
Accumulated Depreciation	1,769,000	[3]
Acquisition Date	17-Sep-08
Industrial [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Los Angeles, CA
Number of Buildings	1
Encumbrances	16,924,000	[1]
Initial Cost to Company, Land	6,400,000
Initial Cost to Company, Building & Improvements	71,761,000	[2]
Initial Cost to Company, Total	78,161,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,000	[4]
Gross Amount Carried, Land	6,400,000
Gross Amount Carried, Building and Improvements	71,760,000	[2]
Gross Amount Carried, Total Costs	78,160,000	[3],[4]
Accumulated Depreciation	7,063,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Dallas, TX
Number of Buildings	1
Encumbrances	3,563,000	[1]
Initial Cost to Company, Land	1,580,000
Initial Cost to Company, Building & Improvements	6,610,000	[2]
Initial Cost to Company, Total	8,190,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,000	[4]
Gross Amount Carried, Land	1,580,000
Gross Amount Carried, Building and Improvements	6,609,000	[2]
Gross Amount Carried, Total Costs	8,189,000	[3],[4]
Accumulated Depreciation	1,709,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Central Kentucky
Number of Buildings	1
Encumbrances	11,579,000	[1]
Initial Cost to Company, Land	730,000
Initial Cost to Company, Building & Improvements	25,092,000	[2]
Initial Cost to Company, Total	25,822,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-2,000	[4]
Gross Amount Carried, Land	730,000
Gross Amount Carried, Building and Improvements	25,090,000	[2]
Gross Amount Carried, Total Costs	25,820,000	[3],[4]
Accumulated Depreciation	8,682,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Cleveland, OH
Number of Buildings	1
Encumbrances	8,684,000	[1]
Initial Cost to Company, Land	2,525,000
Initial Cost to Company, Building & Improvements	17,337,000	[2]
Initial Cost to Company, Total	19,862,000
Cost Capitalized or Adjustments Subsequent to Acquisition	3,943,000	[4]
Gross Amount Carried, Land	2,525,000
Gross Amount Carried, Building and Improvements	21,280,000	[2]
Gross Amount Carried, Total Costs	23,805,000	[3],[4]
Accumulated Depreciation	3,423,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Chicago, IL
Number of Buildings	1
Encumbrances	8,907,000	[1]
Initial Cost to Company, Land	925,000
Initial Cost to Company, Building & Improvements	18,937,000	[2]
Initial Cost to Company, Total	19,862,000
Cost Capitalized or Adjustments Subsequent to Acquisition	798,000	[4]
Gross Amount Carried, Land	925,000
Gross Amount Carried, Building and Improvements	19,735,000	[2]
Gross Amount Carried, Total Costs	20,660,000	[3],[4]
Accumulated Depreciation	4,097,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Houston, TX
Number of Buildings	1
Encumbrances	18,537,000	[1]
Initial Cost to Company, Land	3,700,000
Initial Cost to Company, Building & Improvements	37,639,000	[2]
Initial Cost to Company, Total	41,339,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,000	[4]
Gross Amount Carried, Land	3,700,000
Gross Amount Carried, Building and Improvements	37,638,000	[2]
Gross Amount Carried, Total Costs	41,338,000	[3],[4]
Accumulated Depreciation	7,514,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Denver, CO
Number of Buildings	1
Encumbrances	2,794,000	[1]
Initial Cost to Company, Land	800,000
Initial Cost to Company, Building & Improvements	5,431,000	[2]
Initial Cost to Company, Total	6,231,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,000	[4]
Gross Amount Carried, Land	800,000
Gross Amount Carried, Building and Improvements	5,432,000	[2]
Gross Amount Carried, Total Costs	6,232,000	[3],[4]
Accumulated Depreciation	1,348,000	[3]
Acquisition Date	25-Jun-10
Industrial [Member] | Minimum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'19 years
Industrial [Member] | Minimum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Industrial [Member] | Minimum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Industrial [Member] | Minimum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Industrial [Member] | Minimum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Industrial [Member] | Minimum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'2 years
Industrial [Member] | Minimum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Industrial [Member] | Minimum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Industrial [Member] | Minimum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'9 years
Industrial [Member] | Minimum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Industrial [Member] | Minimum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'8 years
Industrial [Member] | Minimum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Industrial [Member] | Minimum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Industrial [Member] | Minimum [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'10 years
Industrial [Member] | Minimum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Industrial [Member] | Minimum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Industrial [Member] | Minimum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Industrial [Member] | Minimum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'16 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'6 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'6 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'8 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'8 years
Industrial [Member] | Minimum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'8 years
Industrial [Member] | Maximum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Industrial [Member] | Maximum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Number of Buildings	31
Encumbrances	281,135,000	[1]
Initial Cost to Company, Land	224,325,000
Initial Cost to Company, Building & Improvements	491,997,000	[2]
Initial Cost to Company, Total	716,322,000
Cost Capitalized or Adjustments Subsequent to Acquisition	8,717,000	[3]
Gross Amount Carried, Land	227,218,000
Gross Amount Carried, Building and Improvements	497,821,000	[2]
Gross Amount Carried, Total Costs	725,039,000	[3],[4]
Accumulated Depreciation	122,537,000	[3]
Retail [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'San Antonio, TX
Number of Buildings	1
Encumbrances	21,500,000	[1]
Initial Cost to Company, Land	8,221,000
Initial Cost to Company, Building & Improvements	23,472,000	[2]
Initial Cost to Company, Total	31,693,000
Cost Capitalized or Adjustments Subsequent to Acquisition	367,000	[3]
Gross Amount Carried, Land	8,221,000
Gross Amount Carried, Building and Improvements	23,839,000	[2]
Gross Amount Carried, Total Costs	32,060,000	[3],[4]
Accumulated Depreciation	5,883,000	[3]
Acquisition Date	1-Feb-07
Retail [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Raleigh, NC
Number of Buildings	1
Encumbrances	26,200,000	[1]
Initial Cost to Company, Land	13,017,000
Initial Cost to Company, Building & Improvements	31,375,000	[2]
Initial Cost to Company, Total	44,392,000
Cost Capitalized or Adjustments Subsequent to Acquisition	792,000	[3]
Gross Amount Carried, Land	13,017,000
Gross Amount Carried, Building and Improvements	32,167,000	[2]
Gross Amount Carried, Total Costs	45,184,000	[3],[4]
Accumulated Depreciation	7,386,000	[3]
Acquisition Date	11-May-07
Retail [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Philadelphia, PA
Number of Buildings	1
Encumbrances	67,800,000	[1]
Initial Cost to Company, Land	26,488,000
Initial Cost to Company, Building & Improvements	76,838,000	[2]
Initial Cost to Company, Total	103,326,000
Cost Capitalized or Adjustments Subsequent to Acquisition	831,000	[3]
Gross Amount Carried, Land	26,488,000
Gross Amount Carried, Building and Improvements	77,669,000	[2]
Gross Amount Carried, Total Costs	104,157,000	[3],[4]
Accumulated Depreciation	19,359,000	[3]
Acquisition Date	11-May-07
Retail [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Pittsburgh, PA
Number of Buildings	1
Encumbrances	16,000,000	[1]
Initial Cost to Company, Land	9,371,000
Initial Cost to Company, Building & Improvements	16,214,000	[2]
Initial Cost to Company, Total	25,585,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-1,117,000	[3]
Gross Amount Carried, Land	9,502,000
Gross Amount Carried, Building and Improvements	14,966,000	[2]
Gross Amount Carried, Total Costs	24,468,000	[3],[4]
Accumulated Depreciation	1,984,000	[3]
Acquisition Date	11-May-07
Retail [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Jacksonville, FL
Number of Buildings	1
Initial Cost to Company, Land	3,768,000
Initial Cost to Company, Building & Improvements	16,660,000	[2]
Initial Cost to Company, Total	20,428,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-929,000	[3]
Gross Amount Carried, Land	3,768,000
Gross Amount Carried, Building and Improvements	15,731,000	[2]
Gross Amount Carried, Total Costs	19,499,000	[3],[4]
Accumulated Depreciation	3,149,000	[3]
Acquisition Date	27-Jun-07
Retail [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	9,270,000
Initial Cost to Company, Building & Improvements	31,266,000	[2]
Initial Cost to Company, Total	40,536,000
Cost Capitalized or Adjustments Subsequent to Acquisition	520,000	[3]
Gross Amount Carried, Land	9,270,000
Gross Amount Carried, Building and Improvements	31,786,000	[2]
Gross Amount Carried, Total Costs	41,056,000	[3],[4]
Accumulated Depreciation	8,328,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	4,590,000
Initial Cost to Company, Building & Improvements	14,724,000	[2]
Initial Cost to Company, Total	19,314,000
Cost Capitalized or Adjustments Subsequent to Acquisition	191,000	[3]
Gross Amount Carried, Land	4,590,000
Gross Amount Carried, Building and Improvements	14,915,000	[2]
Gross Amount Carried, Total Costs	19,505,000	[3],[4]
Accumulated Depreciation	4,511,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	10,574,000	[1]
Initial Cost to Company, Land	8,580,000
Initial Cost to Company, Building & Improvements	12,494,000	[2]
Initial Cost to Company, Total	21,074,000
Cost Capitalized or Adjustments Subsequent to Acquisition	742,000	[3]
Gross Amount Carried, Land	8,580,000
Gross Amount Carried, Building and Improvements	13,236,000	[2]
Gross Amount Carried, Total Costs	21,816,000	[3],[4]
Accumulated Depreciation	4,109,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	1,890,000
Initial Cost to Company, Building & Improvements	6,480,000	[2]
Initial Cost to Company, Total	8,370,000
Cost Capitalized or Adjustments Subsequent to Acquisition	353,000	[3]
Gross Amount Carried, Land	1,890,000
Gross Amount Carried, Building and Improvements	6,833,000	[2]
Gross Amount Carried, Total Costs	8,723,000	[3],[4]
Accumulated Depreciation	1,949,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	14,070,000	[1]
Initial Cost to Company, Land	8,780,000
Initial Cost to Company, Building & Improvements	23,683,000	[2]
Initial Cost to Company, Total	32,463,000
Cost Capitalized or Adjustments Subsequent to Acquisition	178,000	[3]
Gross Amount Carried, Land	8,780,000
Gross Amount Carried, Building and Improvements	23,861,000	[2]
Gross Amount Carried, Total Costs	32,641,000	[3],[4]
Accumulated Depreciation	5,321,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	15,825,000	[1]
Initial Cost to Company, Land	7,380,000
Initial Cost to Company, Building & Improvements	25,778,000	[2]
Initial Cost to Company, Total	33,158,000
Cost Capitalized or Adjustments Subsequent to Acquisition	65,000	[3]
Gross Amount Carried, Land	7,380,000
Gross Amount Carried, Building and Improvements	25,843,000	[2]
Gross Amount Carried, Total Costs	33,223,000	[3],[4]
Accumulated Depreciation	5,515,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	24,400,000	[1]
Initial Cost to Company, Land	13,130,000
Initial Cost to Company, Building & Improvements	27,030,000	[2]
Initial Cost to Company, Total	40,160,000
Cost Capitalized or Adjustments Subsequent to Acquisition	1,658,000	[3]
Gross Amount Carried, Land	13,130,000
Gross Amount Carried, Building and Improvements	28,688,000	[2]
Gross Amount Carried, Total Costs	41,818,000	[3],[4]
Accumulated Depreciation	6,904,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	4,817,000	[1]
Initial Cost to Company, Land	14,396,000
Initial Cost to Company, Building & Improvements	594,000	[2]
Initial Cost to Company, Total	14,990,000
Gross Amount Carried, Land	14,396,000
Gross Amount Carried, Building and Improvements	594,000	[2]
Gross Amount Carried, Total Costs	14,990,000	[3],[4]
Accumulated Depreciation	497,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	4,770,000	[1]
Initial Cost to Company, Land	10,405,000
Initial Cost to Company, Building & Improvements	917,000	[2]
Initial Cost to Company, Total	11,322,000
Gross Amount Carried, Land	10,405,000
Gross Amount Carried, Building and Improvements	917,000	[2]
Gross Amount Carried, Total Costs	11,322,000	[3],[4]
Accumulated Depreciation	319,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Fifteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	2,417,000
Initial Cost to Company, Building & Improvements	86,000	[2]
Initial Cost to Company, Total	2,503,000
Gross Amount Carried, Land	2,417,000
Gross Amount Carried, Building and Improvements	86,000	[2]
Gross Amount Carried, Total Costs	2,503,000	[3],[4]
Accumulated Depreciation	86,000	[3]
Acquisition Date	1-Aug-07
Depreciable Life (years)	'35 years
Retail [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	8,600,000	[1]
Initial Cost to Company, Land	5,340,000
Initial Cost to Company, Building & Improvements	16,490,000	[2]
Initial Cost to Company, Total	21,830,000
Gross Amount Carried, Land	5,340,000
Gross Amount Carried, Building and Improvements	16,490,000	[2]
Gross Amount Carried, Total Costs	21,830,000	[3],[4]
Accumulated Depreciation	3,247,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	6,560,000
Initial Cost to Company, Building & Improvements	22,013,000	[2]
Initial Cost to Company, Total	28,573,000
Gross Amount Carried, Land	6,560,000
Gross Amount Carried, Building and Improvements	22,013,000	[2]
Gross Amount Carried, Total Costs	28,573,000	[3],[4]
Accumulated Depreciation	4,570,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	5,170,000
Initial Cost to Company, Building & Improvements	19,396,000	[2]
Initial Cost to Company, Total	24,566,000
Cost Capitalized or Adjustments Subsequent to Acquisition	-257,000	[3]
Gross Amount Carried, Land	4,913,000
Gross Amount Carried, Building and Improvements	19,396,000	[2]
Gross Amount Carried, Total Costs	24,309,000	[3],[4]
Accumulated Depreciation	4,958,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	7,459,000	[1]
Initial Cost to Company, Land	3,610,000
Initial Cost to Company, Building & Improvements	11,682,000	[2]
Initial Cost to Company, Total	15,292,000
Gross Amount Carried, Land	3,610,000
Gross Amount Carried, Building and Improvements	11,682,000	[2]
Gross Amount Carried, Total Costs	15,292,000	[3],[4]
Accumulated Depreciation	2,377,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	2,530,000
Initial Cost to Company, Building & Improvements	2,074,000	[2]
Initial Cost to Company, Total	4,604,000
Cost Capitalized or Adjustments Subsequent to Acquisition	214,000	[3]
Gross Amount Carried, Land	2,530,000
Gross Amount Carried, Building and Improvements	2,288,000	[2]
Gross Amount Carried, Total Costs	4,818,000	[3],[4]
Accumulated Depreciation	1,076,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	3,920,000
Initial Cost to Company, Building & Improvements	7,765,000	[2]
Initial Cost to Company, Total	11,685,000
Cost Capitalized or Adjustments Subsequent to Acquisition	433,000	[3]
Gross Amount Carried, Land	3,920,000
Gross Amount Carried, Building and Improvements	8,198,000	[2]
Gross Amount Carried, Total Costs	12,118,000	[3],[4]
Accumulated Depreciation	2,165,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	1,810,000
Initial Cost to Company, Building & Improvements	4,233,000	[2]
Initial Cost to Company, Total	6,043,000
Cost Capitalized or Adjustments Subsequent to Acquisition	109,000	[3]
Gross Amount Carried, Land	1,810,000
Gross Amount Carried, Building and Improvements	4,342,000	[2]
Gross Amount Carried, Total Costs	6,152,000	[3],[4]
Accumulated Depreciation	1,884,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	1,490,000
Initial Cost to Company, Building & Improvements	5,084,000	[2]
Initial Cost to Company, Total	6,574,000
Cost Capitalized or Adjustments Subsequent to Acquisition	388,000	[3]
Gross Amount Carried, Land	1,490,000
Gross Amount Carried, Building and Improvements	5,472,000	[2]
Gross Amount Carried, Total Costs	6,962,000	[3],[4]
Accumulated Depreciation	1,394,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	1,200,000
Initial Cost to Company, Building & Improvements	2,437,000	[2]
Initial Cost to Company, Total	3,637,000
Gross Amount Carried, Land	1,200,000
Gross Amount Carried, Building and Improvements	2,437,000	[2]
Gross Amount Carried, Total Costs	3,637,000	[3],[4]
Accumulated Depreciation	944,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	3,650,000
Initial Cost to Company, Building & Improvements	6,507,000	[2]
Initial Cost to Company, Total	10,157,000
Cost Capitalized or Adjustments Subsequent to Acquisition	5,000	[3]
Gross Amount Carried, Land	3,650,000
Gross Amount Carried, Building and Improvements	6,512,000	[2]
Gross Amount Carried, Total Costs	10,162,000	[3],[4]
Accumulated Depreciation	2,066,000	[3]
Acquisition Date	1-Aug-07
Retail [Member] | Real Estate Property Twenty Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	5,896,000	[1]
Initial Cost to Company, Land	5,290,000
Initial Cost to Company, Building & Improvements	8,814,000	[2]
Initial Cost to Company, Total	14,104,000
Gross Amount Carried, Land	5,290,000
Gross Amount Carried, Building and Improvements	8,814,000	[2]
Gross Amount Carried, Total Costs	14,104,000	[3],[4]
Accumulated Depreciation	1,696,000	[3]
Acquisition Date	18-Oct-07
Retail [Member] | Real Estate Property Twenty Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	8,237,000	[1]
Initial Cost to Company, Land	3,790,000
Initial Cost to Company, Building & Improvements	11,152,000	[2]
Initial Cost to Company, Total	14,942,000
Gross Amount Carried, Land	3,790,000
Gross Amount Carried, Building and Improvements	11,152,000	[2]
Gross Amount Carried, Total Costs	14,942,000	[3],[4]
Accumulated Depreciation	2,055,000	[3]
Acquisition Date	18-Oct-07
Retail [Member] | Real Estate Property Twenty Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Encumbrances	6,061,000	[1]
Initial Cost to Company, Land	5,850,000
Initial Cost to Company, Building & Improvements	14,547,000	[2]
Initial Cost to Company, Total	20,397,000
Gross Amount Carried, Land	5,850,000
Gross Amount Carried, Building and Improvements	14,547,000	[2]
Gross Amount Carried, Total Costs	20,397,000	[3],[4]
Accumulated Depreciation	2,868,000	[3]
Acquisition Date	18-Oct-07
Retail [Member] | Real Estate Property Twenty Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Washington, DC
Number of Buildings	1
Encumbrances	38,926,000	[1]
Initial Cost to Company, Land	19,779,000
Initial Cost to Company, Building & Improvements	42,515,000	[2]
Initial Cost to Company, Total	62,294,000
Cost Capitalized or Adjustments Subsequent to Acquisition	330,000	[3]
Gross Amount Carried, Land	19,781,000
Gross Amount Carried, Building and Improvements	42,843,000	[2]
Gross Amount Carried, Total Costs	62,624,000	[3],[4]
Accumulated Depreciation	12,866,000	[3]
Acquisition Date	6-Apr-09
Retail [Member] | Real Estate Property Thirty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	8,850,000
Initial Cost to Company, Total	8,850,000
Cost Capitalized or Adjustments Subsequent to Acquisition	3,744,000	[3]
Gross Amount Carried, Land	11,867,000
Gross Amount Carried, Building and Improvements	727,000	[2]
Gross Amount Carried, Total Costs	12,594,000	[3],[4]
Accumulated Depreciation	187,000	[3]
Acquisition Date	18-Feb-11
Retail [Member] | Real Estate Property Thirty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Boston
Number of Buildings	1
Initial Cost to Company, Land	3,783,000
Initial Cost to Company, Building & Improvements	9,677,000	[2]
Initial Cost to Company, Total	13,460,000
Cost Capitalized or Adjustments Subsequent to Acquisition	100,000	[3]
Gross Amount Carried, Land	3,783,000
Gross Amount Carried, Building and Improvements	9,777,000	[2]
Gross Amount Carried, Total Costs	13,560,000	[3],[4]
Accumulated Depreciation	2,884,000	[3]
Acquisition Date	17-Mar-11
Retail [Member] | Minimum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Retail [Member] | Minimum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Retail [Member] | Minimum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Retail [Member] | Minimum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'7 years
Retail [Member] | Minimum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'4 years
Retail [Member] | Minimum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Retail [Member] | Minimum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'2 years
Retail [Member] | Minimum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'8 years
Retail [Member] | Minimum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'18 years
Retail [Member] | Minimum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'16 years
Retail [Member] | Minimum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'13 years
Retail [Member] | Minimum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'19 years
Retail [Member] | Minimum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'16 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'2 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'6 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'11 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'21 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'22 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'15 years
Retail [Member] | Minimum [Member] | Real Estate Property Twenty Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'5 years
Retail [Member] | Minimum [Member] | Real Estate Property Thirty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'6 years
Retail [Member] | Minimum [Member] | Real Estate Property Thirty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'3 years
Retail [Member] | Maximum [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'45 years
Retail [Member] | Maximum [Member] | Real Estate Property Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'57 years
Retail [Member] | Maximum [Member] | Real Estate Property Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Ten [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Eleven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twelve [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Thirteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'63 years
Retail [Member] | Maximum [Member] | Real Estate Property Fourteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'68 years
Retail [Member] | Maximum [Member] | Real Estate Property Sixteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'86 years
Retail [Member] | Maximum [Member] | Real Estate Property Seventeen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'43 years
Retail [Member] | Maximum [Member] | Real Estate Property Eighteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Nineteen [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'56 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Two [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Three [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Four [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Five [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Six [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Seven [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Eight [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'65 years
Retail [Member] | Maximum [Member] | Real Estate Property Twenty Nine [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Retail [Member] | Maximum [Member] | Real Estate Property Thirty [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'62 years
Retail [Member] | Maximum [Member] | Real Estate Property Thirty One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Depreciable Life (years)	'40 years
Land [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Number of Buildings	0
Initial Cost to Company, Land	5,200,000
Initial Cost to Company, Total	5,200,000
Gross Amount Carried, Land	5,200,000
Gross Amount Carried, Building and Improvements	153,000	[2]
Gross Amount Carried, Total Costs	5,353,000	[3],[4]
Land [Member] | Real Estate Property One [Member]	'
Real Estate and Accumulated Depreciation [Line Items]	'
Market	'Denver, CO
Number of Buildings	0
Initial Cost to Company, Land	5,200,000
Initial Cost to Company, Total	5,200,000
Gross Amount Carried, Land	5,200,000
Gross Amount Carried, Building and Improvements	153,000	[2]
Gross Amount Carried, Total Costs	$5,353,000	[3],[4]
Acquisition Date	25-Jun-10
[1]	Encumbrances represents mortgage debt principal balances encumbering each property as of DecemberB 31, 2013.
[2]	Building and improvements include intangible lease assets.
[3]	Amount is presented net of impairments and other write-offs of tenant-related assets that were recorded at acquisition as part of our purchase price accounting. Such write-offs are the results of lease expirations and terminations.
[4]	As of DecemberB 31, 2013, the aggregate cost for federal income tax purposes of investments in real property was approximately $2.2 billion (unaudited).

Schedule_III_Real_Estate_and_A2

Schedule III - Real Estate and Accumulated Depreciation (Activity of Real Estate and Accumulated Depreciation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments in real estate:	'	'	'
Balance at the beginning of the year	$2,819,550	$2,724,684	$2,858,307
Acquisitions of operating properties	114,827	128,258	21,825
Improvements	26,680	18,405	18,944
Basis of operating properties disposed of	-387,977	-46,097	-150,892
Impairment of real property	-2,600	-5,700	-23,500
Balance at the end of the year	2,570,480	2,819,550	2,724,684
Accumulated depreciation:	'	'	'
Balance at the beginning of the year	482,782	361,357	247,608
Net additions charged to costs and expenses	20,065	121,425	113,749
Balance at the end of the year	$502,847	$482,782	$361,357