Gramercy Property Trust 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	7-May-15
Document Document And Entity Information [Abstract]
Entity Registrant Name	CHAMBERS STREET PROPERTIES
Entity Central Index Key	1297587
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		236,860,895

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments in Real Estate:
Land	$630,783	$630,840
Land Available for Expansion	24,992	23,368
Buildings and Improvements	1,685,019	1,674,955
Gross investments in Real Estate	2,340,794	2,329,163
Less: Accumulated Depreciation and Amortization	-257,510	-239,973
Net Investments in Real Estate	2,083,284	2,089,190
Investments in Unconsolidated Entities	394,738	423,693
Cash and Cash Equivalents	44,658	40,139
Restricted Cash	15,186	14,718
Tenant and Other Receivables, Net	11,676	11,216
Deferred Rent	41,071	39,429
Deferred Leasing Costs and Intangible Assets, Net	208,614	220,490
Deferred Financing Costs, Net	8,555	9,321
Prepaid Expenses and Other Assets	19,385	21,612
Total Assets	2,827,167	2,869,808
LIABILITIES
Secured Notes Payable, Net	581,706	610,608
Unsecured Term Loan Facilities	570,000	570,000
Unsecured Revolving Credit Facility	235,044	200,044
Accounts Payable, Accrued Expenses and Other Liabilities	74,786	76,421
Intangible Liabilities, Net	25,067	26,248
Prepaid Rent and Security Deposits	16,939	15,569
Distributions Payable	10,075	9,951
Total Liabilities	1,513,617	1,508,841
COMMITMENTS AND CONTINGENCIES (NOTE 13)
SHAREHOLDERS' EQUITY
Common Shares of Beneficial Interest, $0.01 par value, 990,000,000 shares authorized; 236,861,496 and 236,920,675 issued and outstanding as of March 31, 2015 and December 31, 2014, respectively	2,366	2,364
Additional Paid-in-Capital	2,073,109	2,071,526
Accumulated Deficit	-713,877	-689,654
Accumulated Other Comprehensive Loss	-48,048	-23,269
Total Shareholders' Equity	1,313,550	1,360,967
Total Liabilities and Shareholders' Equity	$2,827,167	$2,869,808

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common Shares, Par Value	$0.01	$0.01
Common Shares of Beneficial Interest, shares authorized	990,000,000	990,000,000
Common Shares of Beneficial Interest, issued	236,861,496	236,920,675
Common Shares of Beneficial Interest, outstanding	236,861,496	236,920,675

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
REVENUES
Rental	$54,346	$51,876
Tenant Reimbursements	16,439	15,220
Other Property Income	198	1,069
Total Revenues	70,983	68,165
EXPENSES
Property Operating	9,781	9,553
Real Estate Taxes	10,782	9,801
General and Administrative	9,873	6,864
Acquisition-Related	0	290
Depreciation and Amortization	27,920	27,238
Total Expenses	58,356	53,746
Income Before Other (Expenses) Income	12,627	14,419
OTHER EXPENSES AND INCOME
Interest and Other Income	80	167
Interest Expense	-13,059	-14,061
Interest Expense and Net Change in Fair Value of Non-Qualifying Derivative Financial Instruments	17	26
Total Other (Expenses)	-12,962	-13,868
(Loss) Income Before Provision for Income Taxes and Equity in Income of Unconsolidated Entities	-335	551
Provision For Income Taxes	-176	-58
Equity in Income of Unconsolidated Entities	6,505	2,826
NET INCOME	$5,994	$3,319
Net Income per Share	$0.03	$0.01
Weighted Average Common Shares Outstanding - Basic (in shares)	236,940,134	236,583,752
Weighted Average Common Shares Outstanding - Diluted (in shares)	236,963,354	236,583,752
Dividends declared per Common Share (in usd per share)	$0.13	$0.13

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
NET INCOME	$5,994	$3,319
Foreign Currency Translation (Loss) Gain	-18,736	823
Swap Fair Value Adjustments	-6,043	-2,761
COMPREHENSIVE (LOSS) INCOME	($18,785)	$1,381

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$5,994	$3,319
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Equity in Income of Unconsolidated Entities	-6,505	-2,826
Distributions from Unconsolidated Entities	10,225	10,076
Gain on Interest Rate Swaps	-17	-26
Prepaid Tenant Improvement Amortization	-365	0
Lease Inducement Amortization	252	0
Depreciation and Amortization	27,920	27,238
Amortization of Non-Cash Interest Expense	-380	-104
Amortization of Above and Below Market Leases	975	1,482
Share-Based Compensation	4,038	1,012
Straight-Line Rent Adjustment	-1,668	-1,291
Changes in Operating Assets and Liabilities:
Tenant and Other Receivables	-465	-1,297
Prepaid Expenses and Other Assets	102	337
Accounts Payable, Accrued Expenses and Other Liabilities	-3,874	-6,185
Net Cash Flows Provided by Operating Activities	36,232	31,735
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of Real Property	-1,715	-27,450
Distributions from Unconsolidated Entities	7,407	10,186
Restricted Cash	-468	3,021
Lease Commissions	-322	-1,396
Improvements to Investments in Real Estate	-10,446	-398
Net Cash Flows Used in Investing Activities	-5,544	-16,037
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase and Cancellation of Vested Shares	-3,240	-247
Payment of Distributions	-30,093	-29,797
Borrowings on Unsecured Revolving Credit Facility	35,000	10,000
Principal Payments on Unsecured Revolving Credit Facility	0	-10,000
Principal Payments on Secured Notes Payable	-27,757	-23,991
Payment of Financing Costs	0	-62
Net Cash Flows (Used in) Provided by Financing Activities	-26,090	-54,097
EFFECT OF FOREIGN CURRENCY TRANSLATION	-79	-43
Net Increase (Decrease) in Cash and Cash Equivalents	4,519	-38,442
Cash and Cash Equivalents, Beginning of the Period	40,139	83,007
Cash and Cash Equivalents, End of the Period	44,658	44,565
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash Paid During the Period for Interest	13,694	14,298
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Distributions Declared and Payable	10,075	9,954
Accounts Payable and Accrued ExpensesbConstruction In Progress	3,715	58
Deferred Revenue Due to Cash Trap Provision	377	0
Reserve for Cash Held by Lenders	$839	$0

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Shares	Additional Paid-in-Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2013	$1,484,650	$2,359	$2,067,008	($589,313)	$4,596
Balance, Shares at Dec. 31, 2013		236,463,981
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	3,319			3,319
Other Comprehensive Loss	-1,938				-1,938
Share Based Compensation, Shares		578,425
Share-Based Compensation	1,012	1	1,011
Repurchase and Cancellation of Vested Shares, Shares		-31,959
Repurchase and Cancellation of Vested Shares	-247	0	-247
Distributions, $0.128 and $0.126 for 2015 and 2014 respectively	-29,820			-29,820
Balance at Mar. 31, 2014	1,456,976	2,360	2,067,772	-615,814	2,658
Balance, Shares at Mar. 31, 2014		237,010,447
Balance at Dec. 31, 2014	1,360,967	2,364	2,071,526	-689,654	-23,269
Balance, Shares at Dec. 31, 2014	236,920,675	236,920,675
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	5,994			5,994
Other Comprehensive Loss	-24,779				-24,779
Share Based Compensation, Shares		350,000
Share-Based Compensation	3,334	6	3,328
Repurchase and Cancellation of Vested Shares, Shares		-409,179
Repurchase and Cancellation of Vested Shares	-3,240	-4	-3,236
Non-Cash Amortization of Share-Based Compensation	1,491		1,491
Distributions, $0.128 and $0.126 for 2015 and 2014 respectively	-30,217			-30,217
Balance at Mar. 31, 2015	$1,313,550	$2,366	$2,073,109	($713,877)	($48,048)
Balance, Shares at Mar. 31, 2015	236,861,496	236,861,496

Consolidated_Statements_of_Equ1

Consolidated Statements of Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Distributions declared	$0.13	$0.13

Organization_and_Nature_of_Bus

Organization and Nature of Business	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Business	Organization and Nature of Business
	Chambers Street Properties (NYSE: CSG) is a self-administered real estate investment trust ("REIT") that focuses on acquiring, owning and managing net leased industrial and office properties leased to creditworthy tenants. We were formed under the laws of the state of Maryland on March 30, 2004, and have elected to be taxed as a REIT under sections 856 through 860 of the Internal Revenue Code of 1986 (the "Internal Revenue Code") beginning with the taxable period ended December 31, 2004.
	We operate in an umbrella partnership REIT structure in which our operating partnership, CSP Operating Partnership, LP ("CSP OP"), indirectly owns substantially all of the properties acquired on our behalf. CSP OP was formed in Delaware on March 30, 2004, and we are the 100% owner and sole general partner. For each interest in our common shares of beneficial interest $0.01 par value (the "common shares"), that we issue, an equal interest in the limited partnership units of CSP OP is issued to us in exchange for the cash proceeds from the issuance of the interest in our common shares. As of March 31, 2015, we owned 100% of the limited partnership units of CSP OP directly or indirectly through a wholly-owned taxable REIT subsidiary.
	As of March 31, 2015, we owned, on a consolidated basis, 102 industrial (primarily warehouse/distribution) and office properties located in 18 U.S. states (Arizona, California, Colorado, Florida, Illinois, Indiana, Kansas, Kentucky, Maryland, Massachusetts, Minnesota, New Jersey, North Carolina, Ohio, Pennsylvania, South Carolina, Texas and Virginia) and in the United Kingdom, encompassing approximately 25.3 million rentable square feet. Our consolidated properties were approximately 97.6% leased (based upon rentable square feet) as of March 31, 2015. As of March 31, 2015, 77 of our consolidated properties were net leased to single tenants, which encompassed approximately 20.6 million rentable square feet.
	We had ownership interests in four unconsolidated entities that, as of March 31, 2015, owned interests in 28 properties. Excluding those properties owned through our investment in CB Richard Ellis Strategic Partners Asia II-A, L.P. ("CBRE Strategic Partners Asia"), we owned, on an unconsolidated basis, 25 industrial (primarily warehouse/distribution) and office properties located in seven U.S. states (Arizona, Florida, Illinois, Indiana, Ohio, Tennessee and Texas) and three countries in Europe (France, Germany and the United Kingdom), encompassing approximately 12.3 million rentable square feet. Our unconsolidated properties were approximately 99.9% leased (based upon rentable square feet) as of March 31, 2015. As of March 31, 2015, 20 of our unconsolidated properties were net leased to single tenants, which encompassed approximately 11.5 million rentable square feet.
	Unless the context otherwise requires or indicates, references to the "Company," "we," "our" and "us" refer to the activities of and the assets and liabilities of the business and operations of Chambers Street Properties and its subsidiaries. References to unconsolidated properties include properties owned through unconsolidated joint ventures and do not include properties owned by CBRE Strategic Partners Asia. See Note 4 "Investments in Unconsolidated Entities."

Basis_of_Presentation_and_Summ

Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies
	Basis of Presentation and Principles of Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") and reflect the accounts of the Company, CSP OP and its consolidated subsidiaries. The Company consolidates its wholly-owned properties and joint ventures it controls through either 1) voting rights or similar rights or 2) by means other than voting rights if the Company is deemed to be the primary beneficiary of a variable interest entity. All intercompany accounts and transactions are eliminated in consolidation.
	Certain information and footnotes required for annual financial statement presentation have been condensed or excluded pursuant to Securities and Exchange Commission (the "SEC") rules and regulations. Accordingly, our interim financial statements do not include all of the information and disclosures required under GAAP for complete financial statements. In the opinion of management, all adjustments of a normal recurring nature considered necessary in all material respects to present fairly our financial position, results of our operations and cash flows as of and for the three months ended March 31, 2015 have been made. The results of operations for the three months ended March 31, 2015 are not necessarily indicative of the results of operations to be expected for the entire year. The consolidated financial statements and notes thereto should be read in conjunction with our current Annual Report on Form 10-K, which contains the latest available audited consolidated financial statements and notes thereto, which are as of and for the year ended December 31, 2014.
	Use of Estimates
	The preparation of financial statements, in conformity with GAAP, requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
	Segment Information
	We currently operate our consolidated properties in two geographic areas, the United States and the United Kingdom. We view our consolidated property operations as two reportable segments, Industrial Properties and Office Properties, which participate in the acquisition, development, ownership, and operation of high quality real estate in their respective segments.
	Revenue Recognition and Valuation of Receivables
	All leases are classified as operating leases and minimum rents are recognized on a straight-line basis over the terms of the leases. The excess of rents recognized over amounts contractually due pursuant to the underlying leases is recorded as deferred rent. In connection with various leases, we have received irrevocable stand-by letters of credit totaling $20.3 million as security for such leases at March 31, 2015 and December 31, 2014.
	Reimbursements from tenants, consisting of amounts due from tenants for common area maintenance, real estate taxes, insurance and other recoverable costs, are recognized as revenue in the period the expenses are incurred. Tenant reimbursements are recognized and presented on a gross basis, when we are the primary obligor with respect to incurring expenses and with respect to having the credit risk.
	Tenant receivables and deferred rent receivables are carried net of the allowances for uncollectible current tenant receivables and deferred rent. Management's determination of the adequacy of these allowances is based primarily upon evaluations of historical loss experience, individual receivables, current economic conditions, and other relevant factors. The allowances are increased or decreased through the provision for bad debts. The allowance for uncollectible rent receivable was $18,000 and $62,000 as of March 31, 2015 and December 31, 2014, respectively.
	Translation of Non-U.S. Currency Amounts
	The financial statements and transactions of our United Kingdom properties are recorded in their functional currency, namely the Great Britain Pound ("GBP") and are then translated into U.S. dollars ("USD").
	Assets and liabilities of these properties are denominated in the functional currency and are then translated at exchange rates in effect at the balance sheet date. Revenues and expenses are translated at the average exchange rate for the reporting period. Translation adjustments are reported in "Accumulated Other Comprehensive Income (Loss)," a component of Shareholders' Equity.
	The carrying value of our United Kingdom assets and liabilities fluctuate due to changes in the exchange rate between the USD and the GBP. The exchange rate of the USD to the GBP was $1.4819 and $1.5576 at March 31, 2015 and December 31, 2014, respectively. The profit and loss average exchange rate of the USD to the GBP was approximately $1.5357 and $1.6586 for the three months ended March 31, 2015 and 2014, respectively.
	The carrying value of our assets and liabilities held within our joint venture in Europe (the "European JV") fluctuate due to changes in the exchange rate between the USD and the Euro ("EUR"). The exchange rate of the USD to the EUR was $1.0732 and $1.2099 at March 31, 2015 and December 31, 2014. The profit and loss average exchange rate of the USD to the EUR was approximately $1.1513 and $1.3679 for the three months ended March 31, 2015 and 2014, respectively.
	Income Taxes
	We elected to be taxed as a REIT under the Internal Revenue Code commencing with our taxable year ended December 31, 2004. To qualify as a REIT, we must meet a number of organizational and operational requirements, including a requirement that we generally distribute at least 90% of our REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gain). It is our current intention to adhere to these requirements and maintain our REIT qualification. As a REIT, we generally will not be subject to corporate level U.S. federal income tax on net income we distribute currently to our shareholders. If we fail to qualify as a REIT in any taxable year, then we will be subject to U.S. federal income taxes at regular corporate rates (including any applicable alternative minimum tax) and may not be able to qualify as a REIT for four subsequent taxable years. We believe that we have met all the REIT organizational and operational requirements for the three months ended March 31, 2015, and we were not subject to any U.S. federal income taxes, other than U.S. federal income taxes on income generated by our Taxable REIT Subsidiary. As such, we have not provided for income taxes other than as addressed below.
	ASC 740-10 Income Taxes requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse.
	We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary difference, projected future taxable income, tax-planning strategies, and results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.
	No deferred tax assets or liabilities were recorded as of March 31, 2015, other than as mentioned below related to the United Kingdom net operating losses. In addition, we believe that any current or deferred tax liability associated with our Taxable REIT Subsidiary would be de minimus.
	We record uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in which (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position, and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
	We did not have any uncertain tax positions which would require us to record any unrecognized tax benefits or additional tax liabilities as of March 31, 2015.
	Even if we qualify for taxation as a REIT, we may be subject to certain state, foreign, and local taxes on our income and property and to U.S. federal income and excise taxes on our undistributed taxable income, if any.
	Included as a component of our tax provision, we have incurred income and other taxes (franchise, local and state government and international) related to our continuing operations in the amount of $176,000 and $58,000 during the three months ended March 31, 2015 and 2014, respectively.
	The United Kingdom taxes real property operating results at a statutory rate of 20%. The properties we own (or hold interest in) in the United Kingdom have operated at a taxable loss to date and have generated a deferred tax asset of approximately $0.6 million consisting of these net operating loss carryforwards. We have provided for a full valuation allowance of $0.6 million as of March 31, 2015 on deferred tax assets because it is not likely that future operating profits in the United Kingdom would be sufficient to absorb the net operating losses.
	The tax years from 2010 through 2014 remain open to examination by the taxing jurisdictions to which the Company is subject.
	Fair Value of Financial Instruments and Investments
	We generally determine or calculate the fair value of financial instruments using appropriate present value or other valuation techniques, such as discounted cash flow analyses, incorporating available market discount rate information for similar types of instruments and our estimates for non-performance and liquidity risk. These techniques are significantly affected by the assumptions used, including the discount rate, credit spreads, and estimates of future cash flow. The Investment Manager of CBRE Strategic Partners Asia applies valuation techniques for our investment carried at fair value based upon the application of the income approach, the direct market comparison approach, the replacement cost approach or third party appraisals to the underlying assets held in the unconsolidated entity in determining the net asset value attributable to our ownership interest therein. As of March 31, 2015, the financial assets and liabilities recorded at fair value in our consolidated financial statements are our derivative instruments and our investment in CBRE Strategic Partners Asia.
	The remaining financial assets and liabilities which are only disclosed at fair value are comprised of all other notes payable, the unsecured line of credit and other debt instruments. We determined the fair value of our secured notes payable and other debt instruments by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market discount rate by obtaining period-end treasury rates for fixed-rate debt, or London Inter-Bank Offering Rate ("LIBOR") rates for variable-rate debt, for maturities that correspond to the maturities of our debt and then adding an appropriate credit spread derived from information obtained from third-party financial institutions. These credit spreads take into account factors such as our credit standing, the maturity of the debt, whether the debt is secured or unsecured, and the loan-to-value ratios of the debt.
	The carrying amounts of our cash and cash equivalents, restricted cash, tenant and other receivables and accounts payable approximate fair value due to their short-term maturities.
	Share-based Compensation
	For share-based awards for which there is no pre-established performance period, we recognize compensation costs over the service vesting period, which represents the requisite service period, on a straight-line basis.
	For share-based awards with service or market conditions, we record the cost of the awards based on the grant-date fair value of the award. That cost is recognized over the period during which an employee is required to provide service in exchange for the award. No compensation cost is recognized for equity instruments for which employees do not render the requisite service. For share-based awards in which the performance period precedes the grant date, we recognize compensation costs straight-lined over the requisite service period, which includes both the performance and service vesting periods.
	During the performance period for a share-based award program, we estimate the total compensation cost of the potential future awards. We then record compensation costs equal to the portion of the requisite service period that has elapsed through the end of the reporting period.
	For share-based awards granted by the Company, CSP OP issues a number of common units equal to the number of common shares ultimately granted by us in respect of such awards.
	New Accounting Standards
	In May 2014, the FASB and IASB issued their final standard on revenue from contracts with customers. The standard, issued by the FASB as ASU 2014-09, outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including the guidance on real estate derecognition for most transactions. Entities have the option of using either a full retrospective or a modified approach to adopt the guidance in ASU 2014-09. For public entities, the ASU is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016. Early application is not permitted. We are assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.
	In January 2015, the FASB issued ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The ASU is a part of the Simplification Initiative, to identify, evaluate, and improve areas of generally accepted accounting principles (GAAP) for which cost and complexity can be reduced while maintaining or improving the usefulness of the information provided to the users of financial statements. The new standard eliminates the requirements for reporting entities to consider whether an underlying event or transaction is extraordinary but retains the presentation and disclosure guidance for items that are unusual in nature and occur infrequently. The ASU applies to all entities and is effective for fiscal years beginning after December 15, 2015, and interim periods thereafter, with early adoption permitted. The adoption of this guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.
	In February 2015, the FASB issued ASU 2015-02, Consolidated (Topic 810): Amendments to the Consolidation Analysis. The ASU changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. Key amendments under the new standard include the following: evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities; elimination of the presumption that a general partner should consolidate a limited partnership; consolidation analysis of reporting entities that are involved with variable interest entities (VIEs), particularly those that have fee arrangements and related party relationship; addition of scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those for registered money market funds. The ASU applies to all reporting entities that are required to evaluate whether they should consolidate certain legal entities and is effective for fiscal years beginning after December 15, 2015, and interim periods thereafter, with early adoption permitted. We are still assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.
	In April 7, 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. This ASU addresses balance sheet presentation requirements for debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability. This will make the presentation of debt issuance costs consistent with the presentation of debt discounts or premiums. The recognition and measurement guidance for debt issuance costs is not affected. The guidance is effective for public business entities for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. For all other entities, it is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. Upon adoption, an entity must apply the new guidance retrospectively to all prior periods presented in the financial statements. An entity is also required in the year of adoption (and in interim periods within that year) to provide certain disclosures about the change in accounting principle, including the nature of and reason for the change, the transition method, a description of the prior-period information that has been retrospectively adjusted and the effect of the change on the financial statement line items (that is, debt issuance cost asset and the debt liability). We are still assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.

Investment_in_Real_Estate_Acti

Investment in Real Estate Activity	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Investment in Real Estate Activity	Investment in Real Estate Activity
	Wholly-Owned Acquisitions
	During the three months ended March 31, 2015, we acquired an 11.8 acre undeveloped parcel in Phoenix, Arizona for approximately $1.7 million. The undeveloped parcel is situated immediately adjacent to our Goodyear Crossing II property.

Investments_in_Unconsolidated_

Investments in Unconsolidated Entities	3 Months Ended
	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities
	As of March 31, 2015 and December 31, 2014, we owned the following number of properties through unconsolidated entities:
		Ownership %		Number of Properties
				March 31,		December 31,
				2015		2014
	Duke JV	80.00%		13		14
	European JV	80.00%		9		9
	UK JV	80.00%		3		3
	CBRE Strategic Partners Asia	5.07%		3		3
				28		29
	Investments in unconsolidated entities at March 31, 2015 and December 31, 2014 consist of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Duke JV	$	230,861		$	239,376
	European JV	125,853			144,141
	UK JV	31,223			33,189
	Afton Ridge	117			117
	CBRE Strategic Partners Asia	6,684			6,870
		$	394,738		$	423,693
	The following is a summary of the investments in unconsolidated entities for the three months ended March 31, 2015 and the year ended December 31, 2014 (in thousands):
		March 31,			December 31,
		2015			2014
	Investment Balance, January 1	$	423,693		$	514,802
	Contributions	—			7,625
	Company's Equity in Net Income (including adjustments for basis differences)	6,505			28,823
	Other Comprehensive Loss of Unconsolidated Entities	(17,828		)	(22,342		)
	Distributions	(17,632		)	(105,215		)
	Investment Balance, End of Period	$	394,738		$	423,693
	The following are the balance sheets of our investments in unconsolidated entities at March 31, 2015 (in thousands):
		Duke JV			European JV			Other (2)			Total
	Assets
	Investments in Real Estate(1)	$	319,663		$	241,518		$	184,245		$	745,426
	Other Assets	32,886			42,108			10,379			85,373
	Total Assets	$	352,549		$	283,626		$	194,624		$	830,799
	Liabilities and Equity
	Secured Notes Payable, net	$	56,948		$	119,897		$	—		$	176,845
	Other Liabilities	7,581			6,413			20,150			34,144
	Total Liabilities	64,529			126,310			20,150			210,989
	CSP Equity	230,861			125,853			38,024			394,738
	Other Investors' Equity	57,159			31,463			136,450			225,072
	Total Liabilities and Equity	$	352,549		$	283,626		$	194,624		$	830,799
	__________
	-1	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke/Hulfish, LLC joint venture (the "Duke JV") that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to January 1, 2009.
	-2	Includes  the Goodman Princeton Holdings (Jersey) Limited joint venture (the "UK JV") and CBRE Strategic Partners Asia.
	The following are the balance sheets of our investments in unconsolidated entities at December 31, 2014 (in thousands):
		Duke JV			European JV			Other (2)			Total
	Assets
	Investments in Real Estate(1)	$	323,236		$	274,128		$	186,360		$	783,724
	Real Estate Investments and Other Assets Held-for-Sale	17,230			—			—			17,230
	Other Assets	32,474			49,435			11,553			93,462
	Total Assets	$	372,940		$	323,563		$	197,913		$	894,416
	Liabilities and Equity
	Liabilities Related to Real Estate Investments Held-for-Sale	$	11,048		$	—		$	—		$	11,048
	Secured Notes Payable, net	57,222			135,173			—			192,395
	Other Liabilities	6,013			8,214			17,093			31,320
	Total Liabilities	74,283			143,387			17,093			234,763
	CSP Equity	239,376			144,141			40,176			423,693
	Other Investors' Equity	59,281			36,035			140,644			235,960
	Total Liabilities and Equity	$	372,940		$	323,563		$	197,913		$	894,416
	__________
	-1	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke JV that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to January 1, 2009.
	-2	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.
	The following are the statements of operations for our investments in unconsolidated entities for the three months ended March 31, 2015 and March 31, 2014 (in thousands):
		Three Months Ended
	March 31, 2015												March 31, 2014
	Duke JV			European JV			Other (1)			Total			Duke JV			European JV		Other (2)			Total
Total Revenue	$	12,631		$	6,573		$	(2,334	)	$	16,870		$	14,660		$	7,336	$	(399	)	$	21,597
Operating Expenses	3,423			1,215			618			5,256			5,036			1,129		745			6,910
Net Operating Income	9,208			5,358			(2,952		)	11,614			9,624			6,207		(1,144		)	14,687
Depreciation and Amortization	5,214			2,601			484			8,299			7,516			2,929		523			10,968
Interest Expense	794			957			—			1,751			1,040			1,133		—			2,173
Gain on Sale of Real Estate	3,020			—			—			3,020			—			—		—			—
Loss on Extinguishment of Debt	(73		)	—			—			(73		)	—			—		—			—
Net Income (Loss)	6,147			1,800			(3,436		)	4,511			1,068			2,145		(1,667		)	1,546
Company Share in Net Income	4,917			1,439			175			6,531			854			1,716		287			2,857
Adjustments for REIT basis	(26		)	—			—			(26		)	(31		)	—		—			(31		)
CSP Equity in Net Income	$	4,891		$	1,439		$	175		$	6,505		$	823		$	1,716	$	287		$	2,826
__________
-1	Includes UK JV and CBRE Strategic Partners Asia.
-2	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.
Investments in Unconsolidated Entities Activity
On January 23, 2015, the Duke JV sold one office property located in Raleigh, North Carolina for approximately $20.6 million, of which our pro rata share was approximately $16.4 million and our pro rata gain was approximately $2.4 million.

Deferred_Leasing_Costs_and_Int

Deferred Leasing Costs and Intangible Assets and Liabilities	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Deferred Leasing Costs and Intangible Assets and Liabilities	Deferred Leasing Costs and Intangible Assets and Liabilities
	The following table summarizes our deferred leasing costs and intangible assets, including acquired above-market leases, acquired in-place leases and other intangible assets and intangible liabilities, including acquired below-market leases and acquired above-market ground lease obligations (in thousands):
		March 31,			December 31,
		2015			2014
	Deferred Leasing Costs and Intangible Assets, Net:
	Deferred Leasing Costs	$	22,848		$	22,481
	Accumulated Amortization	(4,961		)	(4,218		)
	Deferred Leasing Costs, Net	17,887			18,263
	Above-Market Leases	63,566			63,566
	Accumulated Amortization	(32,449		)	(30,311		)
	Above-Market Leases, Net	31,117			33,255
	In-Place Leases	300,124			300,124
	Accumulated Amortization	(141,740		)	(132,414		)
	In-Place Leases, Net	158,384			167,710
	Other Intangible Assets	1,425			1,425
	Accumulated Amortization	(199		)	(163		)
	Other Intangible Assets, Net	1,226			1,262
	Total Deferred Leasing Costs and Intangible Assets, Net	$	208,614		$	220,490
	Intangible Liabilities, Net:
	Below-Market Leases	$	51,653		$	51,653
	Accumulated Amortization	(27,838		)	(26,675		)
	Below-Market Leases, Net	23,815			24,978
	Above-Market Ground Lease Obligation	1,501			1,501
	Accumulated Amortization	(249		)	(231		)
	Above-Market Ground Lease Obligation, Net	1,252			1,270
	Total Intangible Liabilities, Net	$	25,067		$	26,248
	The following table sets forth amortization related to intangible assets and liabilities for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Deferred Leasing Costs(1)	$	749		$	354
	Above-Market Leases(2)	2,138			2,515
	In-Place Leases(1)	9,326			9,469
	Other Intangible Assets(1)	36			—
	Below-Market Leases(2)	(1,163		)	(1,033		)
	Above-Market Ground Lease Obligation(3)	(18		)	(18		)
	__________
	-1	The amortization of deferred leasing costs, in-place leases and other intangible assets are recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
	-2	The amortization of above-market leases and below-market leases are recorded as reductions and additions to rental income, respectively, in the consolidated statements of operations for the periods presented.
	-3	The amortization of the above-market ground lease obligation is recorded as a decrease to property operating expense in the consolidated statements of operations for the periods presented.
	The following is a schedule of future amortization of deferred leasing costs, intangible assets and liabilities as of March 31, 2015 (in thousands):
		Intangible Assets										Intangible Liabilities
		Deferred Leasing Costs			Acquired			Acquired		Other Intangible Assets		Acquired		Above-Market
					Above-Market			In-Place				Below-Market		Ground Lease
					Leases			Leases				Leases		Obligations
	Remaining 2015	$	1,424		$	6,327		$	27,236	$	108	$	3,368	$	53
	2016	1,750			5,557			29,727		144		3,590		71
	2017	1,604			4,466			25,254		144		3,098		71
	2018	1,531			3,862			21,050		144		2,825		71
	2019	1,332			3,300			17,284		144		2,604		71
	Thereafter	10,246			7,605			37,833		542		8,330		915
		$	17,887		$	31,117		$	158,384	$	1,226	$	23,815	$	1,252

Debt

Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Debt
	Secured Debt
	Secured notes payable are summarized as follows (in thousands):
	Property		Stated		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
			Interest Rate						March 31,			December 31,
									2015			2014
	Lakeside Office Center		6.03%		6.03%		9/1/15		$	8,585		$	8,617
	Celebration Office Center III(2)		4.25%		2.50%		12/1/15		8,770			8,817
	22535 Colonial Pkwy(2)		4.25%		2.50%		12/1/15		7,847			7,889
	Northpoint III(2)		4.25%		2.50%		12/1/15		10,155			10,209
	Goodyear Crossing II(2)		4.25%		2.50%		12/1/15		19,386			19,489
	3900 North Paramount Parkway(2)		4.25%		2.50%		12/1/15		7,616			7,656
	3900 South Paramount Parkway(2)		4.25%		2.50%		12/1/15		7,616			7,656
	1400 Perimeter Park Drive(2)		4.25%		2.50%		12/1/15		2,308			2,320
	Miramar I(2)		4.25%		2.50%		12/1/15		9,047			9,095
	Miramar II(2)		4.25%		2.50%		12/1/15		12,185			12,250
	70 Hudson Street (3)		5.65%		5.15%		4/11/16		113,570			114,108
	Point West I - Swapped to Fixed		3.41%		3.41%		12/6/16		10,635			10,716
	100 Tice Blvd		5.97%		4.38%		9/15/17		18,808			18,960
	100 Tice Blvd		5.97%		4.38%		9/15/17		18,808			18,960
	4701 Gold Spike Drive(4)		4.45%		4.45%		3/1/18		9,908			9,958
	1985 International Way(4)		4.45%		4.45%		3/1/18		6,883			6,920
	3660 Deerpark Boulevard(4)		4.45%		4.45%		3/1/18		7,117			7,153
	Tolleson Commerce Park II(4)		4.45%		4.45%		3/1/18		4,280			4,301
	20000 S. Diamond Lake Road(4)		4.45%		4.45%		3/1/18		6,233			6,265
	Atrium I - Swapped to Fixed		3.78%		3.78%		5/31/18		21,346			21,580
	McAuley Place		3.98%		3.50%		9/1/18		12,771			12,865
	Easton III - Swapped to Fixed		3.95%		3.95%		1/31/19		6,234			6,280
	90 Hudson Street		5.66%		5.26%		5/1/19		102,880			103,301
	Fairforest Bldg. 6		5.42%		6.50%		6/1/19		1,664			1,751
	North Rhett I		5.65%		6.50%		8/1/19		1,843			1,958
	Kings Mountain II		5.47%		6.50%		1/1/20		3,318			3,467
	1 Rocket Road		6.60%		4.00%		8/1/20		18,413			18,516
	North Rhett II		5.20%		6.50%		10/1/20		1,372			1,425
	Mount Holly Bldg.		5.20%		6.50%		10/1/20		1,372			1,425
	Orangeburg Park Bldg.		5.20%		6.50%		10/1/20		1,395			1,449
	Kings Mountain I		5.27%		6.50%		10/1/20		1,189			1,235
	Ten Parkway North		4.75%		4.75%		1/1/21		11,388			11,469
	Union Cross Bldg. II		5.53%		6.50%		6/1/21		5,570			5,755
	Union Cross Bldg. I		5.50%		6.50%		7/1/21		1,832			1,892
	Property		Stated		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
			Interest Rate						March 31,			December 31,
									2015			2014
	Norman Pointe I		5.24%		3.50%		10/1/21		20,091			20,177
	Norman Pointe II		5.24%		3.50%		10/1/21		22,119			22,214
	The Landings I		5.24%		3.50%		10/1/21		15,120			15,185
	The Landings II		5.24%		3.50%		10/1/21		13,336			13,393
	Fairforest Bldg. 5		6.33%		6.50%		2/1/24		7,522			7,678
	North Rhett IV		5.80%		6.50%		2/1/25		7,719			7,862
	One Wayside Road(5)		5.66%		5.25%		8/1/15		—			12,938
	One Wayside Road(5)		5.92%		5.25%		8/1/15		—			10,854
	Total Secured Notes Payable								568,251			596,008
	Plus Premium								14,291			15,494
	Less Discount								(836		)	(894		)
	Total Secured Notes Payable, Net								$	581,706		$	610,608
	__________
	-1	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of any discounts/premiums, excluding debt issuance costs.
	-2	These nine loans are cross-collateralized.
	-3	In accordance with the provisions of this loan, beginning in February 2015, the property's excess cash proceeds after the payment of debt service, impounds and budgeted operating expenses are being held by the lender until the loan is repaid or the property is re-leased under terms described in the loan agreement.
	-4	These five loans are cross-collaterialized.
	-5	This loan was paid off in full on February 2, 2015 prior to the maturity date.
	Unsecured Term Loan Facilities
	The terms of our unsecured term loan facilities and outstanding balances as of March 31, 2015 and December 31, 2014 are set forth in the table below (in thousands):
	Term Loan Facility		Unswapped Interest Rate		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
								March 31,			December 31,
								2015			2014
WF Term Loan #2(2)		LIBOR + 1.50%		2.49%		3/7/18		$	200,000		$	200,000
WF Term Loan #3(2)		LIBOR + 1.50%		3.12%		1/15/19		200,000			200,000
TD Term Loan(3)		LIBOR + 1.75%		3.28%		3/6/20		50,000			50,000
Capital One Term Loan(2)		LIBOR + 1.75%		4.32%		1/31/21		120,000			120,000
Total Unsecured Term Loan Facilities								$	570,000		$	570,000
__________
-1	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the effect of the interest rate swaps, excluding debt issuance costs.
-2	As of March 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.156%, respectively, for these loans.
-3	As of March 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.155%, respectively, for this loan.
Unsecured Revolving Credit Facility
The terms of our unsecured revolving credit facility are set forth in the table below (in thousands):
	March 31,				December 31,
	2015				2014
Outstanding Borrowings	$	235,044			$	200,044
Remaining Borrowing Capacity	614,956				649,956
Total Borrowing Capacity	$	850,000			$	850,000
Interest Rate(1)	1.47		%		1.46		%
Facility Fee(2)	30 bps				30 bps
Maturity Date(3)	15-Jan-18				15-Jan-18
__________
-1	Calculated based on one-month LIBOR plus 1.30% as of March 31, 2015 and December 31, 2014.
-2	The facility fee is based on the unsecured revolving credit facility's total borrowing capacity.
-3	We may exercise an option to extend the maturity date by one year.
Debt Covenants and Restrictions
Certain of our secured notes payable are subject to financial covenants (interest coverage and loan to value ratio).
As of March 31, 2015, our unsecured term loan facilities and revolving credit facility were subject to certain financial covenants that require, among other things: the maintenance of (i) a leverage ratio of not more than 0.60; (ii) a fixed charge coverage ratio of at least 1.50; (iii) a secured leverage ratio of not more than (a) 0.45 prior to September 30, 2014 for the Capital One Term Loan, September 26, 2015 for WF Term Loan #2, WF Term Loan #3, and unsecured revolving credit facility, or March 6, 2015 for the TD Term Loan, or (b) 0.40 thereafter; (iv) an unencumbered leverage ratio of not more than 0.60; (v) minimum tangible net worth of $1.5 billion plus 85% of the net proceeds of certain future equity issuances; (vi) unencumbered asset value of at least $400.0 million; and (vii) a minimum of 10 Eligible Properties. In addition, our unsecured term loan facilities and revolving credit facility contain a number of customary non-financial covenants including those restricting liens, mergers, sales of assets, certain investments in unimproved land and mortgage receivables, intercompany transfers, transactions with affiliates and distributions. The Company has provided guarantees in connection with our unsecured term loan facilities and revolving credit facility. As of March 31, 2015, we were in compliance with all financial debt covenants.
The minimum principal payments due for our secured notes payable, unsecured term loan facilities and unsecured revolving credit facility are as follows as of March 31, 2015 (in thousands):
Remaining 2015	$	103,960
2016	134,612
2017	46,822
2018	507,612
2019	308,768
Thereafter	271,521
	$	1,373,295

Risk_Management_and_Use_of_Fin

Risk Management and Use of Financial Instruments	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Risk Management and Use of Financial Instruments	Risk Management and Use of Financial Instruments
	Risk Management
	In the course of our ongoing business operations, we encounter economic risk. There are three main components of economic risk: interest rate risk, credit risk and market risk. We are subject to interest rate risk on our interest-bearing liabilities. Credit risk is primarily the risk of inability or unwillingness of tenants to make contractually required payments and of counterparties on derivatives contracts to fulfill their obligations. Market risk is the risk of declines in the value of our properties due to changes in rental rates, interest rates, supply and demand of similar products and other market factors affecting the valuation of properties.
	Derivative Financial Instruments
	We utilize interest rate swaps to mitigate the effects of interest rate fluctuations on our variable-rate loans. Our strategy is to use a swap to convert the floating-rate borrowing (usually a secured note payable or an unsecured term loan facility) where LIBOR is consistently applied into a fixed-rate obligation with the only variable piece remaining is the spread between different reset dates when/if the swap and debt are not lined up. We generally enter into an interest rate swap agreement concurrently with the origination of the variable-rate loan for an equivalent principal amount for a period covering the term of the loan, which effectively converts our variable-rate debt to a fixed-rate loan. Our use of derivative instruments, including swaps, is limited by policy to hedging or mitigating commercial risk and we do not use derivative instruments for speculative, trading or investment purposes.
	The following table sets forth the terms of our interest rate swaps at March 31, 2015 and December 31, 2014 (amounts in thousands):
		Notional Amount								Fair Value						Rate
	Type of Instrument	March 31,				December 31,				March 31,			December 31,			March 31,		December 31,		Index	Maturity
		2015				2014				2015			2014			2015		2014			Date
	Interest Rate Swap(1)	$	10,635			$	10,716			$	(146	)	$	(135	)	1.2	%	1.3	%	LIBOR	12/6/16
	Interest Rate Swap(2)	200,000				200,000				(116		)	1,467			0.8	%	0.8	%	LIBOR	3/7/18
	Interest Rate Swap(1)	21,346				21,580				(478		)	(354		)	1.6	%	1.6	%	LIBOR	5/31/18
	Interest Rate Swap	200,000				200,000				(3,497		)	(1,540		)	1.5	%	1.5	%	LIBOR	1/15/19
	Interest Rate Swap(1)	6,234				6,280				(177		)	(127		)	1.8	%	1.8	%	LIBOR	1/31/19
	Interest Rate Swap(2)	50,000				50,000				(399		)	266			1.4	%	1.4	%	LIBOR	3/6/20
	Interest Rate Swap	120,000				120,000				(7,179		)	(5,543		)	2.4	%	2.4	%	LIBOR	1/31/21
	__________
	-1	We assumed this swap in connection with the purchase of the Duke Portfolio on March 1, 2013. This swap is considered a hedging instrument under ASC 815-20 as of March 31, 2015. The swap was not considered a hedging instrument under ASC 815-20 during the period from March 1, 2013 to March 31, 2013.
	-2	We entered into these swaps in connection with the origination of the TD Term Loan and WF Term Loan #1 in March 2013. These swaps are considered hedging instruments under ASC 815-20 as of March 31, 2015. These swaps were not considered hedging instruments under ASC 815-20 during the period from March 11, 2013 and March 12, 2013, respectively, to May 29, 2013.
	We record all derivative instruments on a gross basis in the consolidated balance sheets. Accordingly, there are no offsetting amounts that net assets against liabilities. The asset and liability balances presented in the table below reflect the gross amounts of derivatives recorded in the consolidated balance sheets (in thousands):
		Asset Derivatives										Liability Derivatives
				Fair Value									Fair Value
				March 31,				December 31,					March 31,			December 31,
	Type of Instrument	Balance Sheet Location		2015				2014				Balance Sheet Location	2015			2014
	Derivatives designated as hedging instruments
	Interest Rate Swaps	Prepaid Expenses and Other Assets		$	—			$	1,733			Accounts Payable, Accrued Expenses and Other Liabilities	$	11,992		$	7,699
	The table below presents the effect of our derivative instruments on our consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015				2014
	Derivatives Designated as Cash Flow Hedges:
	Gain (Loss) Recognized in Other Comprehensive Income (OCI) (Effective Portion)	$	(8,188	)		$	(5,089	)
	Loss Reclassified from AOCI into Interest Expense (Effective Portion)	(2,145		)		(2,328		)
	Net Change in Fair Value of Derivative Financial Instruments (Ineffective Portion and Amount Excluded from Effectiveness Testing)	17				26
	At March 31, 2015, the Company expects that the hedged forecasted transactions, for each of the outstanding qualifying cash flow hedging relationships, remains probable of occurring. During the next twelve months we anticipate reclassifying $7.5 million of amounts currently recorded in accumulated other comprehensive income to earnings.
	Concentration of Credit Risk
	Our credit risk relates primarily to cash, restricted cash, and interest rate swap agreements. Cash accounts at each U.S. institution are insured by the Federal Deposit Insurance Corporation up to $250,000 through December 31, 2015.
	We have not experienced any losses to date on our invested cash and restricted cash. The interest rate swap agreements create credit risk. Credit risk arises from the potential failure of counterparties to perform in accordance with the terms of their contracts. Our risk management policies define parameters of acceptable market risk and limit exposure to credit risk. Credit exposure resulting from derivative financial instruments is represented by their fair value amounts, increased by an estimate of potential adverse position exposure arising from changes over time in interest rates, maturities, and other relevant factors. We do not anticipate nonperformance by any of our counterparties.
	Our consolidated properties are located throughout the United States and in the United Kingdom. The ability of the tenants to honor the terms of their respective leases is dependent upon the economic, regulatory, and social factors affecting the communities in which the tenants operate. In addition, we do not have any tenant whose rents exceeds 10% of our total rental revenue.

Future_Minimum_Rents

Future Minimum Rents	3 Months Ended
	Mar. 31, 2015
Leases [Abstract]
Future Minimum Rents	Future Minimum Rents
	The following is a schedule of future minimum rents to be received on non-cancelable operating leases from consolidated properties as of March 31, 2015 (in thousands):
	Remaining 2015	$	162,143
	2016	197,435
	2017	185,133
	2018	168,162
	2019	149,110
	Thereafter	463,068
		$	1,325,051

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	As required by the Transitional Services Agreement, we and the former investment advisor have agreed on a list of unacquired real estate investments for which the former investment advisor has performed certain acquisition related consulting services prior to the termination of the Transitional Service Agreement (a "Qualifying Property"). If any Qualifying Property is acquired by us within the nine months following the termination of the Transitional Services Agreement then we shall pay an acquisition consulting fee equal to 0.75% of (i) the contract purchase price of the real estate investments (including debt), or (ii) when we make an investment indirectly through another entity, such investment's pro rata share of the gross asset value of real estate investments held by that entity to the former investment advisor.
	During the year ended December 31, 2014, we acquired one Qualifying Property and paid the former investment advisor $0.2 million in acquisition consulting fees. There are no further Qualifying Properties under the Transitional Services Agreement and we do not anticipate paying the former investment advisor any further acquisition consulting fees.
	Additionally, until June 30, 2017, if we attempt to effect certain types of transactions, including, but not limited to, a merger, consolidation or sale of 10% of more of our business, assets or voting securities (excluding the sale of any securities pursuant to a registration statement filed pursuant to the Securities Act of 1933, as amended), we have agreed under our Transition to Self-Management Agreement, by and among CB Richard Ellis Realty Trust, CBRE Operating Partnership, L.P., CBRE Global Investors, LLC and CBRE Advisors LLC, dated April 27, 2012 (the “Transition to Self-Management Agreement”) to engage CBRE Global Investors, LLC, our former sponsor, or an affiliate of our former sponsor to provide financial advice and assistance in connection therewith provided that such entity continues to have the sufficient expertise and resources to provide such financial advice and assistance.  The transactional financial advisory fee payable by the Company to CBRE Global Investors or its affiliate upon the closing of a transaction will be equal to one-quarter of one percent (0.25%) of the consideration in the transaction, as defined in the Transition to Self-Management Agreement, plus the reimbursement of reasonable expenses.

Equity_Incentive_Plan_and_Perf

Equity Incentive Plan and Performance Bonus Plan	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plan and Performance Bonus Plan	Equity Incentive Plan and Performance Bonus Plan
	Equity Incentive Plan
	At our annual shareholders' meeting held on May 31, 2013, our shareholders approved the 2013 Equity Incentive Plan. Our key employees, directors, trustees, officers, advisors, consultants or other personnel of ours and our subsidiaries or other persons expected to provide significant services to us or our subsidiaries would be eligible to be granted incentive share options, non-qualified share options, share appreciation rights, restricted shares, restricted share units, dividend equivalent rights and other equity-based awards as contemplated in the 2013 Equity Incentive Plan. As of March 31, 2015, there were 3,330,631 common shares available for grant under the 2013 Equity Incentive Plan.
	2015 Awards
	On January 9, 2015, our Board of Trustees' independent trustees, Messrs. Charles Black, Mark Brugger, James Francis, James Orphanides and Louis Salvatore, were awarded restricted shares units ("Trustee RSUs") under the Company's 2013 Equity Incentive Plan on the following terms: (i) (y) Mr. Black was awarded 20,000 Trustee RSUs, and (z) Messrs. Brugger, Francis, Orphanides and Salvatore each were awarded 5,000 Trustee RSUs; and (ii) each award is subject to a mandatory deferral program. Pursuant to the mandatory deferral program, each Trustee RSU entitles a holder to receive one common share upon the earlier of (i) the sixth month anniversary of the holder's separation of service from the Company, and (ii) a change in control of the Company. Each Trustee RSU also entitles a holder to receive an amount equal to the dividends paid on one common share. The fair value of the Trustee RSUs was valued by a third-party valuation firm taking into consideration the mandatory deferral program restrictions. Based on the valuation analysis, the fair value of each Trustee RSU was determined to be $7.13, which represents a discount of 12.5% from the grant date closing share price of $8.15. The expected remaining tenure is estimated to be two years.
	On March 13, 2015, our employees were awarded an aggregate of 474,862 restricted share units under the Company's 2013 Equity Incentive Plan, of which 237,440 are subject to market and service vesting requirements ("Performance Share Units" or "PSUs") and 237,422 are subject to time-based vesting requirements ("Time-Based RSUs" or "RSUs").
	The Time-Based RSUs are subject to vest in three equal annual installments from the date of grant contingent on the grantee's continued employment with the Company. The Company pays an amount into an escrow account for the benefit of the grantee, measured by the dividends and other distributions paid with respect to the number of shares underlying the Time-Based RSU, or a Dividend Equivalent, between the grant date and the date such Time-Based RSU vests. The Dividend Equivalent is paid to the grantee on the relevant vesting dates of the Time-Based RSU.
	The PSUs are restricted share units that vest at the end of a three-year performance period. Each employee is granted a target number of PSUs (the “PSU Target Award”). The actual number of common shares issued to each employee is subject to the achievement of certain levels of total shareholder return relative to the total shareholder return of a peer group of publicly-traded REITs included in the FTSE NAREIT All Equity Total Return Index, over a three-year performance period. There will be no payout of our common shares if our total shareholder return falls below the 30th percentile of the total shareholder returns of the peer group. The maximum number of common shares issued to an employee is equal to 150% of the PSU Target Award and is earned if our total shareholder return is equal to or greater than the 75th percentile of the total shareholder returns of the peer group. The number of PSUs can ultimately fluctuate from the 237,440 granted based upon the levels of achievement for shareholder returns. Compensation expense for the PSU's will be recorded on a straight-line basis over the three year period. The fair value of the Performance Share Unit award was determined using a Monte Carlo simulation performed by a third-party valuation firm. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing model:
			Assumptions
	Fair value per unit at March 13, 2015		$	6
	Expected share price volatility		22		%
	Dividend yield		6		%
	Risk-free interest rate		0.99		%
	Remaining expected life		2.8 years
	The computations of expected volatility are based on a blend of the historical volatility of our common shares and those of our peer group companies with similar operations over approximately five and a half years as that is expected to be most consistent with future volatility and equates to a time period twice as long as the approximate two and four-fifths year remaining performance period of the PSUs. Implied volatility data is based on the observed pricing of six month (180 day) publicly-traded options on each company's common stock. The risk-free interest rate corresponds to the length of the remaining Performance Cycle and is based on the prevailing zero-coupon U.S. Treasury yield as of March 13, 2015. The expected dividend yield is estimated by examining the Company's average dividend yield over the preceding five years, as well as its current dividend yield as of March 13, 2015. The expected life of the PSUs is equal to the remaining 2.8 year vesting period as of March 13, 2015.
	Retirement of Mr. Cuneo
	On March 5, 2015, Mr. Cuneo stepped down as President and Chief Executive Officer of the Company and resigned from the Board of Trustees of the Company. Pursuant to his Memorandum of Retirement dated November 9, 2014, Mr. Cuneo remained employed by the Company in a non-officer position through March 16, 2015. As part of his 2014 performance bonus, Mr. Cuneo received 75,000 Time-Based RSUs and 75,000 PSUs, which became fully vested upon his retirement. We recognized cash compensation of approximately $187,000 and non-cash compensation of approximately $3.3 million related to Mr. Cuneo’s retirement in 2015.
	2014 Awards
	On January 29, 2014, our Board's independent trustees, Messrs. Black, Brugger, Francis, Orphanides and Salvatore, were awarded equity grants under our 2013 Equity Incentive Plan on the following terms: (i) (x) Mr. Black's award was for 20,000 common shares, (y) Messrs. Orphanides and Salvatore each were awarded 5,000 common shares and (z) Messrs. Brugger and Francis each were awarded 1,550 common shares, for a total of 33,100 common shares awarded to trustees and (ii) each award vested in its entirety, upon issuance. We recorded compensation expense based upon the $7.87 price per share on January 29, 2014.
	On February 26, 2014, the Company and Operating Partnership entered into an amendment to Martin A. Reid's employment agreement, effective as of January 1, 2013, increasing Mr. Reid's annual target Long Term Incentive Award to 90,000 restricted common shares of the Company.
	On March 15, 2014, a total of 401,875 restricted common shares were granted to our named executive officers (Messrs. Cuneo, Kianka and Reid) based on each executive's achievement of performance objectives during 2013, as determined at the discretion of our Compensation Committee. Additionally, 25 of our employees were granted 143,450 restricted common shares, in the aggregate, on March 15, 2014. One-third of the restricted shares granted to our named executive officers and employees will vest on each of the first three anniversaries of grant if the grantee is employed by the Company on such anniversary. We recorded compensation expense based upon the $7.74 price per share on March 15, 2014. Compensation expense is recognized on a straight-line basis over the service vesting period of three years. We recognized share-based compensation expense of $171,000 and $66,000 during the three and three months ended March 31, 2015 and 2014 as a result of granting the awards to our named executive officers and our employees.
	On July 31, 2014, the Compensation Committee of the Board of Trustees of the Company (the “Compensation Committee”) adopted and approved an incentive bonus plan, a form of restricted share award agreement, and a form of restricted share unit award agreement that may be used in connection with awards made pursuant to the 2013 Equity Incentive Plan from time to time to the Company’s trustees, executive officers and other employees.
	The incentive bonus plan is intended to provide additional incentive for key employees of the Company to perform to the best of their abilities, to further the growth, development and financial success of the Company, and to enable us to attract and retain qualified and talented individuals. Restricted shares are awarded to grantees based on a time-based vesting formula. Restricted share units represent a contingent commitment of the Company to issue shares to a grantee based on certain performance-based goals determined by the Compensation Committee.
	Summary of Time-Based Restricted Common Shares
	A summary of our Time-Based Restricted Common Shares from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested Restricted Stock
		Common Shares			Weighted-Average
					Grant Date
					Fair Value
					per Share
	Outstanding at January 1, 2015	800,699			$	8.68
	Granted(1)	200,000			8.1
	Vested(1)(2)	(728,963	)		8.5
	Outstanding at March 31, 2015	271,736			$	8.53
	__________
	-1	Shares granted to Mr. Cuneo were fully vested upon his retirement.
	-2	Total shares vested include 331,485 common shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the restricted common shares that have vested. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
	Summary of Time-Based Restricted Share Units
	A summary of our Time-Based Restricted Share Units from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested RSUs
		Amount			Weighted-Average Grant Date Fair Value Per Share			Vested RSUs		Total RSUs
	Outstanding at January 1, 2015	—			$	—		—		—
	Granted	237,422			7.78			—		237,422
	Vested	(75,000	)		7.78			75,000		—
	Settled(1)	—			—			(75,000	)	(75,000	)
	Outstanding at March 31, 2015	162,422			$	7.78		—		162,422
	__________
	-1	Represents vested RSUs that were settled in shares of the Company's common shares. Total shares settled include 38,806 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the RSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
	Summary of Performance Share Units
	A summary of our Performance Share Units from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested PSUs
		Amount			Weighted-Average Grant Date Fair Value Per Share			Vested PSUs		Total PSUs
	Outstanding at January 1, 2015	—			$	—		—		—
	Granted	237,440			6.56			—		237,440
	Vested	(75,000	)		7.78			75,000		—
	Settled(1)	—			—			(75,000	)	(75,000	)
	Outstanding at March 31, 2015	162,440			$	6		—		162,440
	__________
	-1	Represents vested PSUs that were settled in shares of the Company's common shares. Total shares settled include 38,888 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the PSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
		2015				2014
		(in thousands, except share data)
	Compensation Expense Recorded During the Three Months Ended March 31(1)	$	4,038			$	1,012
	Unamortized Compensation Costs	$	4,269			$	8,263
	Shares Available for the Future Awards(2)	3,330,631				4,019,075
__________
-1	2015 compensation expense includes severance expense totaling $3.3 million.
-2	Shares available for the future awards includes units under our 2013 Equity Incentive Plan.

Shareholders_Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity
	Common Shares
	Under our current declaration of trust, we have the authority to issue a total of 1,000,000,000 shares of beneficial interest. Of the total shares authorized, 990,000,000 shares are designated as common shares, with a par value of $0.01 per share, and 10,000,000 shares are designated as preferred shares, with a par value of $0.01 per share. As of March 31, 2015 and December 31, 2014, there were no preferred shares issued or outstanding.
	At-The-Market Offering
	On November 6, 2013, we and CSP OP entered into four separate Equity Distribution Agreements with certain sales agents, pursuant to which we may sell, from time to time, our common shares having an aggregate offering price of up to $250.0 million. Sales of our common shares may be made in ordinary brokers' transactions on the NYSE, in negotiated transactions or transactions that are deemed to be "at the market" ("ATM") offerings, including sales made to or through a market maker other than on an exchange, at prices related to the prevailing market prices or at negotiated prices. We may use these proceeds and proceeds from the sale of its debt securities to repay debt, including borrowings under our unsecured revolving credit facility, to make acquisitions of properties or portfolios of properties, or for general corporate purposes. As of March 31, 2015 there have been no sales of common shares under the ATM program.
	Accumulated Other Comprehensive Income (Loss)
	The following presents the changes in the balances of each component of accumulated other comprehensive income (loss) for the three months ended March 31, 2015 and 2014 (in thousands):
		Foreign Currency			Swap Fair Value			Accumulated
		Translation Gain (Loss)			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2015	$	(17,513	)	$	(5,756	)	$	(23,269	)
	Other Comprehensive Loss Before Reclassifications	(18,736		)	(8,188		)	(26,924		)
	Amounts Reclassified from Accumulated Other Comprehensive Income to Interest Expense	—			2,145			2,145
	Balance at March 31, 2015	$	(36,249	)	$	(11,799	)	$	(48,048	)
		Foreign Currency			Swap Fair Value			Accumulated
		Translation Gain			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2014	$	1,670		$	2,926		$	4,596
	Other Comprehensive Income (Loss) Before Reclassifications	823			(5,089		)	(4,266		)
	Amounts reclassified from Accumulated Other Comprehensive Income to Interest Expense	—			2,328			2,328
	Balance at March 31, 2014	$	2,493		$	165		$	2,658

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments and Investments	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments and Investments	Fair Value of Financial Instruments and Investments
	We apply the three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices for identical financial instruments in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as instruments that have little to no pricing observability as of the reported date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.
	As of March 31, 2015 and December 31, 2014, we held certain items that were required to be measured at fair value on a recurring basis. These included cash equivalents, interest rate swap derivative contracts and our equity method investment in CBRE Strategic Partners Asia. Cash equivalents consist of short-term, highly liquid, income-producing investments, all of which have original maturities of 90 days or less, including money market funds and U.S. Government obligations. Derivative instruments are related to our economic hedging activities with respect to interest rates.
	The fair values of the interest rate swap derivative agreements are estimated with the assistance of a third-party valuation specialist using the market standard methodology of discounting the future expected cash payments and receipts on the pay and receive legs of the interest rate swap agreements that swap the estimated variable rate mortgage note payment stream for a fixed rate receive payment stream over the period of the loan. The variable interest rates used in the calculation of projected receipts on the interest rate swap agreements 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 (where appropriate). Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of March 31, 2015 and December 31, 2014, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. We have consistently applied these valuation techniques in all periods presented and believe we have obtained the most accurate information available for the types of derivative contracts we hold.
	Our investment in CBRE Strategic Partners Asia is based on the Level 3 valuation inputs applied by the Investment Manager of this investment company utilizing a mix of different approaches for valuing the underlying real estate related investments within the investment company. The approaches include the income approach, direct market comparison approach and the replacement cost approach for newer properties. For investments owned more than one year, except for investments under construction or incurring significant renovation, it is CBRE Strategic Partners Asia’s policy to obtain a third-party appraisal. For investments in real estate under construction or incurring significant renovation, the valuation analysis is prepared by the Investment Manager. On a quarterly basis, the Company obtains the financial results of CBRE Strategic Partners Asia and on an annual basis the Company receives audited financial statements.
	Impairment of Real Estate
	During the year ended December 31, 2014, we recognized an impairment charge of $27.6 million in continuing operations related to our 70 Hudson Street property. Accordingly, we reduced the carrying value of this property to the property’s current estimated fair value of approximately $94.0 million. The inputs used to calculate the fair value included projected cash flows and risk-adjusted rate of return that we estimated would be used by a market participant in valuing the asset or by obtaining a range of third-party broker valuation estimates.
	We utilized a discounted cash flow analysis to estimate the property's fair value. The unobservable inputs (Level 3) of our real estate that was recorded at fair value as of December 31, 2014 included a discount rate of 12%, a terminal capitalization rate of 6.5%, a market rent growth rate range of 3% - 3.4% and an expense growth rate of 3%.
	The following items are measured at fair value on a recurring basis and non-recurring basis at March 31, 2015 and December 31, 2014 (in thousands):
		As of March 31, 2015
		Fair Value Measurements Using:
		Quoted				Significant			Significant			Total
		Markets				Observable			Unobservable			Fair Value
		Prices				Inputs			Inputs
		(Level 1)				(Level 2)			(Level 3)
	Assets (Liabilities)
	Cash and Cash Equivalents	$	1,574			$	—		$	—		$	1,574
	Interest Rate Swaps Designated as Cash Flow Hedges - Assets	—				—			—			—
	Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	—				(11,992		)	—			(11,992		)
	Investment in CBRE Strategic Partners Asia	—				—			6,684			6,684
		As of December 31, 2014
		Fair Value Measurements Using:
		Quoted				Significant			Significant			Total
		Markets				Observable			Unobservable			Fair Value
		Prices				Inputs			Inputs
		(Level 1)				(Level 2)			(Level 3)
	Assets (Liabilities)
	Cash and Cash Equivalents	$	1,573			$	—		$	—		$	1,573
	Interest Rate Swaps Designated as Cash Flow Hedges - Assets	—				1,733			—			1,733
	Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	—				(7,699		)	—			(7,699		)
	Investment in CBRE Strategic Partners Asia	—				—			6,870			6,870
	Fair Value of Real Estate at Impairment(1)	—				—			94,000			94,000
	__________
	-1	Represents a non-recurring fair value measurement.
	The following table presents our activity for our investment in CBRE Strategic Partners Asia measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015 and 2014, respectively (in thousands):
	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)		Investment in
			CBRE Strategic
			Partners Asia
	Balance at January 1, 2015		$	6,870
	Translation Adjustment in Other Comprehensive Income		(186		)
	Balance at March 31, 2015		$	6,684
	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)		Investment in
			CBRE Strategic
			Partners Asia
	Balance at January 1, 2014		$	9,676
	Total Loss on Fair Value Adjustment		(112		)
	Balance at March 31, 2014		$	9,564
	Disclosure of Fair Value Financial Instruments
	For disclosure purposes only, the following table summarizes our notes payable and their estimated fair value at March 31, 2015 and December 31, 2014 (in thousands):
			March 31, 2015							31-Dec-14
	Financial Instrument		Carrying				Fair			Carrying			Fair
			Value				Value			Value			Value
	Secured Notes Payable(1)		$	581,706			$	603,775		$	610,608		$	628,194
	Unsecured Term Loan Facilities(1)		$	570,000			$	584,654		$	570,000		$	577,196
	Unsecured Revolving Credit Facility(1)		$	235,044			$	235,044		$	200,044		$	200,044
	__________
	-1	Items are measured using Level 2 inputs.
	These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Ground Leases - We own a property that is subject to a long-term noncancellable ground lease obligation that contractually expires on November 30, 2032. We have three ten-year renewal options that will allow us to extend the expiration of the ground lease through November 30, 2062. The minimum commitment under the ground lease as of March 31, 2015 and thereafter is as follows (in thousands):
	Remaining 2015	$	205
	2016	273
	2017	273
	2018	276
	2019	308
	Thereafter	4,474
		$	5,809
	Litigation—From time to time, we and our properties may be subject to legal proceedings, which arise in the ordinary course of our business. Currently, neither our Company nor any of our properties are subject to, or threatened with, any legal proceedings for which the outcome is reasonably likely to have a material adverse effect on our financial statements.
	Environmental Matters—We are not aware of any material environmental liability or any unasserted claim or assessment with respect to a material environmental liability that we believe would require additional disclosure or the recording of a loss contingency.

Segment_Disclosure

Segment Disclosure	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Disclosure	Segment Disclosure
	We view our consolidated property operations as two reportable segments: Industrial Properties and Office Properties. In addition, we had one non-reportable segment, which was Retail Properties. However, during the third quarter ended September 30, 2014 we sold our last remaining retail property, therefore, eliminating the non-reportable segment from future reportable presentations. Management internally evaluates the operating performance and financial results of our segments based on net operating income. We also have certain general and administrative level activities including legal, accounting, tax preparation and shareholder servicing costs that are not considered separate operating segments.
	We evaluate the performance of our segments based on net operating income, defined as: rental income, tenant reimbursements and other property income less property and related expenses (operating and maintenance and real estate taxes) and excludes other non-property income and expenses, interest expense, depreciation and amortization, and corporate general and administrative expenses.
	The following table compares the net operating income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Industrial Properties
	Revenues:
	Rental	$	18,386		$	14,145
	Tenant Reimbursements	4,948			3,721
	Other Property Income	198			—
	Total Revenues	23,532			17,866
	Property and Related Expenses:
	Property Operating	1,872			1,491
	Real Estate Taxes	3,832			3,129
	Total Property and Related Expenses	5,704			4,620
	Net Operating Income	$	17,828		$	13,246
	Office Properties
	Revenues:
	Rental	$	35,960		$	36,700
	Tenant Reimbursements	11,491			11,476
	Other Property Income	—			1,069
	Total Revenues	47,451			49,245
	Property and Related Expenses:
	Property Operating	7,909			8,002
	Real Estate Taxes	6,950			6,672
	Total Property and Related Expenses	14,859			14,674
	Net Operating Income	$	32,592		$	34,571
	Non-Reportable Properties
	Revenues:
	Rental	$	—		$	1,031
	Tenant Reimbursements	—			23
	Total Revenues	—			1,054
	Property and Related Expenses:
	Property Operating	—			60
	Real Estate Taxes	—			—
	Total Property and Related Expenses	—			60
	Net Operating Income	$	—		$	994
		Three Months Ended
		March 31,
		2015			2014
	Reconciliation to Consolidated Net Income
	Total Segment Net Operating Income	$	50,420		$	48,811
	Expenses:
	General and Administrative	9,873			6,864
	Acquisition-Related	—			290
	Depreciation and Amortization	27,920			27,238
	Total Expenses	37,793			34,392
	Income Before Other (Expenses) Income	12,627			14,419
	Other Expenses and Income
	Interest and Other Income	80			167
	Interest Expense	(13,059		)	(14,061		)
	Interest Expense and Net Change in Fair Value of Non-Qualifying Derivative Financial Instruments	17			26
	(Loss) Income Before Provision for Income Taxes and Equity in Income of Unconsolidated Entities	(335		)	551
	Provision for Income Taxes	(176		)	(58		)
	Equity in Income of Unconsolidated Entities	6,505			2,826
	Net Income	$	5,994		$	3,319
		March 31,			December 31,
	Assets	2015			2014
	Industrial Properties	$	915,999		$	916,038
	Office Properties	1,491,098			1,504,285
	Non-Segment Assets(1)	420,070			449,485
	Total Assets	$	2,827,167		$	2,869,808
_________
-1	Non-segment assets primarily include our investments in unconsolidated entities.

Earnings_per_Share

Earnings per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share
	The following table reconciles the numerator and denominator in computing the Company's basic and diluted per-share computations for net income for the three months ended March 31, 2015 and 2014 is as follows (in thousands except share data):
		Three Months Ended
		March 31,
		2015			2014
	Numerator:
	Net Income	$	5,994		$	3,319
	Allocation to Participating Securities (Nonvested Restricted Shares and Vested RSUs)	(40		)	(127		)
	Numerator for Basic and Diluted Net Income	$	5,954		$	3,192
	Denominator:
	Basic Weighted Average Shares Outstanding	236,940,134			236,583,752
	Effect of Dilutive Securities - Non-Vested Time-Based RSUs	23,220			—
	Diluted Weighted Average Shares Outstanding	236,963,354			236,583,752
	Basic and Diluted Earnings Per Share:
	Net Income per Share	$	0.03		$	0.01

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	On April 28, 2015, our Board of Trustees approved a monthly distribution of $0.0425 per common share for each of the months of July, August and September of 2015. The July dividend will be paid on August 10, 2015 to all shareholders of record on July 31, 2015, the August dividend will be paid on September 9, 2015 to all shareholders of record on August 31, 2015, and the September dividend will be paid on October 8, 2015 to all shareholders of record on September 30, 2015.
	On April 28, 2015, our Board of Trustees appointed Hugh S. O’Beirne, in addition to his current position of General Counsel, as Executive Vice President, Chief Legal Officer, Chief Compliance Officer, Chief Risk Officer and Secretary.
	On May 8, 2015, we entered into (i) amendments to the employment agreements with certain of our officers, including Martin A. Reid, our Interim President and Chief Executive Officer, and Chief Financial Officer, and Philip L. Kianka, our Chief Operating Officer, and (ii) an amended and restated severance agreement with Hugh S. O'Beirne, our Chief Legal Officer, General Counsel, Chief Compliance Officer, Chief Risk Officer and Secretary, which, in each case, amended the definition of "Change of Control" to provide that a Change in Control of our company would occur following any consolidation or merger of the company if the company's shareholders immediately prior to the consolidation or merger, would not, immediately thereafter, in substantially the same proportions, beneficially own shares representing 70% rather than 50%, of the combined voting power of the securities of the corporation issuing cash or securities in the consolidation or merger.

Basis_of_Presentation_and_Summ1

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") and reflect the accounts of the Company, CSP OP and its consolidated subsidiaries. The Company consolidates its wholly-owned properties and joint ventures it controls through either 1) voting rights or similar rights or 2) by means other than voting rights if the Company is deemed to be the primary beneficiary of a variable interest entity. All intercompany accounts and transactions are eliminated in consolidation.
	Certain information and footnotes required for annual financial statement presentation have been condensed or excluded pursuant to Securities and Exchange Commission (the "SEC") rules and regulations. Accordingly, our interim financial statements do not include all of the information and disclosures required under GAAP for complete financial statements. In the opinion of management, all adjustments of a normal recurring nature considered necessary in all material respects to present fairly our financial position, results of our operations and cash flows as of and for the three months ended March 31, 2015 have been made. The results of operations for the three months ended March 31, 2015 are not necessarily indicative of the results of operations to be expected for the entire year. The consolidated financial statements and notes thereto should be read in conjunction with our current Annual Report on Form 10-K, which contains the latest available audited consolidated financial statements and notes thereto, which are as of and for the year ended December 31, 2014.
Use of Estimates	Use of Estimates
	The preparation of financial statements, in conformity with GAAP, requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Segment Information	Segment Information
	We currently operate our consolidated properties in two geographic areas, the United States and the United Kingdom. We view our consolidated property operations as two reportable segments, Industrial Properties and Office Properties, which participate in the acquisition, development, ownership, and operation of high quality real estate in their respective segments
Revenue Recognition and Valuation of Receivables	Revenue Recognition and Valuation of Receivables
	All leases are classified as operating leases and minimum rents are recognized on a straight-line basis over the terms of the leases. The excess of rents recognized over amounts contractually due pursuant to the underlying leases is recorded as deferred rent. In connection with various leases, we have received irrevocable stand-by letters of credit totaling $20.3 million as security for such leases at March 31, 2015 and December 31, 2014.
	Reimbursements from tenants, consisting of amounts due from tenants for common area maintenance, real estate taxes, insurance and other recoverable costs, are recognized as revenue in the period the expenses are incurred. Tenant reimbursements are recognized and presented on a gross basis, when we are the primary obligor with respect to incurring expenses and with respect to having the credit risk.
	Tenant receivables and deferred rent receivables are carried net of the allowances for uncollectible current tenant receivables and deferred rent. Management's determination of the adequacy of these allowances is based primarily upon evaluations of historical loss experience, individual receivables, current economic conditions, and other relevant factors. The allowances are increased or decreased through the provision for bad debts.
Translation of Non-U.S. Currency Amounts	Translation of Non-U.S. Currency Amounts
	The financial statements and transactions of our United Kingdom properties are recorded in their functional currency, namely the Great Britain Pound ("GBP") and are then translated into U.S. dollars ("USD").
	Assets and liabilities of these properties are denominated in the functional currency and are then translated at exchange rates in effect at the balance sheet date. Revenues and expenses are translated at the average exchange rate for the reporting period. Translation adjustments are reported in "Accumulated Other Comprehensive Income (Loss)," a component of Shareholders' Equity.
Income Taxes	Income Taxes
	We elected to be taxed as a REIT under the Internal Revenue Code commencing with our taxable year ended December 31, 2004. To qualify as a REIT, we must meet a number of organizational and operational requirements, including a requirement that we generally distribute at least 90% of our REIT taxable income (determined without regard to the dividends paid deduction and excluding net capital gain). It is our current intention to adhere to these requirements and maintain our REIT qualification. As a REIT, we generally will not be subject to corporate level U.S. federal income tax on net income we distribute currently to our shareholders. If we fail to qualify as a REIT in any taxable year, then we will be subject to U.S. federal income taxes at regular corporate rates (including any applicable alternative minimum tax) and may not be able to qualify as a REIT for four subsequent taxable years. We believe that we have met all the REIT organizational and operational requirements for the three months ended March 31, 2015, and we were not subject to any U.S. federal income taxes, other than U.S. federal income taxes on income generated by our Taxable REIT Subsidiary. As such, we have not provided for income taxes other than as addressed below.
	ASC 740-10 Income Taxes requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse.
	We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary difference, projected future taxable income, tax-planning strategies, and results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.
	No deferred tax assets or liabilities were recorded as of March 31, 2015, other than as mentioned below related to the United Kingdom net operating losses. In addition, we believe that any current or deferred tax liability associated with our Taxable REIT Subsidiary would be de minimus.
	We record uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in which (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position, and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
Fair Value of Financial Instruments and Investments	Fair Value of Financial Instruments and Investments
	We generally determine or calculate the fair value of financial instruments using appropriate present value or other valuation techniques, such as discounted cash flow analyses, incorporating available market discount rate information for similar types of instruments and our estimates for non-performance and liquidity risk. These techniques are significantly affected by the assumptions used, including the discount rate, credit spreads, and estimates of future cash flow. The Investment Manager of CBRE Strategic Partners Asia applies valuation techniques for our investment carried at fair value based upon the application of the income approach, the direct market comparison approach, the replacement cost approach or third party appraisals to the underlying assets held in the unconsolidated entity in determining the net asset value attributable to our ownership interest therein. As of March 31, 2015, the financial assets and liabilities recorded at fair value in our consolidated financial statements are our derivative instruments and our investment in CBRE Strategic Partners Asia.
	The remaining financial assets and liabilities which are only disclosed at fair value are comprised of all other notes payable, the unsecured line of credit and other debt instruments. We determined the fair value of our secured notes payable and other debt instruments by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market discount rate by obtaining period-end treasury rates for fixed-rate debt, or London Inter-Bank Offering Rate ("LIBOR") rates for variable-rate debt, for maturities that correspond to the maturities of our debt and then adding an appropriate credit spread derived from information obtained from third-party financial institutions. These credit spreads take into account factors such as our credit standing, the maturity of the debt, whether the debt is secured or unsecured, and the loan-to-value ratios of the debt.
	The carrying amounts of our cash and cash equivalents, restricted cash, tenant and other receivables and accounts payable approximate fair value due to their short-term maturities.
Share-based Compensation	Share-based Compensation
	For share-based awards for which there is no pre-established performance period, we recognize compensation costs over the service vesting period, which represents the requisite service period, on a straight-line basis.
	For share-based awards with service or market conditions, we record the cost of the awards based on the grant-date fair value of the award. That cost is recognized over the period during which an employee is required to provide service in exchange for the award. No compensation cost is recognized for equity instruments for which employees do not render the requisite service. For share-based awards in which the performance period precedes the grant date, we recognize compensation costs straight-lined over the requisite service period, which includes both the performance and service vesting periods.
	During the performance period for a share-based award program, we estimate the total compensation cost of the potential future awards. We then record compensation costs equal to the portion of the requisite service period that has elapsed through the end of the reporting period.
	For share-based awards granted by the Company, CSP OP issues a number of common units equal to the number of common shares ultimately granted by us in respect of such awards.
New Accounting Standards	New Accounting Standards
	In May 2014, the FASB and IASB issued their final standard on revenue from contracts with customers. The standard, issued by the FASB as ASU 2014-09, outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including the guidance on real estate derecognition for most transactions. Entities have the option of using either a full retrospective or a modified approach to adopt the guidance in ASU 2014-09. For public entities, the ASU is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016. Early application is not permitted. We are assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.
	In January 2015, the FASB issued ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The ASU is a part of the Simplification Initiative, to identify, evaluate, and improve areas of generally accepted accounting principles (GAAP) for which cost and complexity can be reduced while maintaining or improving the usefulness of the information provided to the users of financial statements. The new standard eliminates the requirements for reporting entities to consider whether an underlying event or transaction is extraordinary but retains the presentation and disclosure guidance for items that are unusual in nature and occur infrequently. The ASU applies to all entities and is effective for fiscal years beginning after December 15, 2015, and interim periods thereafter, with early adoption permitted. The adoption of this guidance is not anticipated to have a material impact on our consolidated financial statements or notes to our consolidated financial statements.
	In February 2015, the FASB issued ASU 2015-02, Consolidated (Topic 810): Amendments to the Consolidation Analysis. The ASU changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. Key amendments under the new standard include the following: evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities; elimination of the presumption that a general partner should consolidate a limited partnership; consolidation analysis of reporting entities that are involved with variable interest entities (VIEs), particularly those that have fee arrangements and related party relationship; addition of scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those for registered money market funds. The ASU applies to all reporting entities that are required to evaluate whether they should consolidate certain legal entities and is effective for fiscal years beginning after December 15, 2015, and interim periods thereafter, with early adoption permitted. We are still assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.
	In April 7, 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. This ASU addresses balance sheet presentation requirements for debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability. This will make the presentation of debt issuance costs consistent with the presentation of debt discounts or premiums. The recognition and measurement guidance for debt issuance costs is not affected. The guidance is effective for public business entities for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. For all other entities, it is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. Upon adoption, an entity must apply the new guidance retrospectively to all prior periods presented in the financial statements. An entity is also required in the year of adoption (and in interim periods within that year) to provide certain disclosures about the change in accounting principle, including the nature of and reason for the change, the transition method, a description of the prior-period information that has been retrospectively adjusted and the effect of the change on the financial statement line items (that is, debt issuance cost asset and the debt liability). We are still assessing the impact of this guidance on our consolidated financial statements and notes to our consolidated financial statements.

Investments_in_Unconsolidated_1

Investments in Unconsolidated Entities (Tables)	3 Months Ended
	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Real Estate Properties	As of March 31, 2015 and December 31, 2014, we owned the following number of properties through unconsolidated entities:
		Ownership %		Number of Properties
				March 31,		December 31,
				2015		2014
	Duke JV	80.00%		13		14
	European JV	80.00%		9		9
	UK JV	80.00%		3		3
	CBRE Strategic Partners Asia	5.07%		3		3
				28		29
Investments in Unconsolidated Entities	Investments in unconsolidated entities at March 31, 2015 and December 31, 2014 consist of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Duke JV	$	230,861		$	239,376
	European JV	125,853			144,141
	UK JV	31,223			33,189
	Afton Ridge	117			117
	CBRE Strategic Partners Asia	6,684			6,870
		$	394,738		$	423,693
Summary of Investments in Unconsolidated Entities	The following is a summary of the investments in unconsolidated entities for the three months ended March 31, 2015 and the year ended December 31, 2014 (in thousands):
		March 31,			December 31,
		2015			2014
	Investment Balance, January 1	$	423,693		$	514,802
	Contributions	—			7,625
	Company's Equity in Net Income (including adjustments for basis differences)	6,505			28,823
	Other Comprehensive Loss of Unconsolidated Entities	(17,828		)	(22,342		)
	Distributions	(17,632		)	(105,215		)
	Investment Balance, End of Period	$	394,738		$	423,693
Consolidated Balance Sheet	The following are the balance sheets of our investments in unconsolidated entities at March 31, 2015 (in thousands):
		Duke JV			European JV			Other (2)			Total
	Assets
	Investments in Real Estate(1)	$	319,663		$	241,518		$	184,245		$	745,426
	Other Assets	32,886			42,108			10,379			85,373
	Total Assets	$	352,549		$	283,626		$	194,624		$	830,799
	Liabilities and Equity
	Secured Notes Payable, net	$	56,948		$	119,897		$	—		$	176,845
	Other Liabilities	7,581			6,413			20,150			34,144
	Total Liabilities	64,529			126,310			20,150			210,989
	CSP Equity	230,861			125,853			38,024			394,738
	Other Investors' Equity	57,159			31,463			136,450			225,072
	Total Liabilities and Equity	$	352,549		$	283,626		$	194,624		$	830,799
	__________
	-1	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke/Hulfish, LLC joint venture (the "Duke JV") that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to January 1, 2009.
	-2	Includes  the Goodman Princeton Holdings (Jersey) Limited joint venture (the "UK JV") and CBRE Strategic Partners Asia.
	The following are the balance sheets of our investments in unconsolidated entities at December 31, 2014 (in thousands):
		Duke JV			European JV			Other (2)			Total
	Assets
	Investments in Real Estate(1)	$	323,236		$	274,128		$	186,360		$	783,724
	Real Estate Investments and Other Assets Held-for-Sale	17,230			—			—			17,230
	Other Assets	32,474			49,435			11,553			93,462
	Total Assets	$	372,940		$	323,563		$	197,913		$	894,416
	Liabilities and Equity
	Liabilities Related to Real Estate Investments Held-for-Sale	$	11,048		$	—		$	—		$	11,048
	Secured Notes Payable, net	57,222			135,173			—			192,395
	Other Liabilities	6,013			8,214			17,093			31,320
	Total Liabilities	74,283			143,387			17,093			234,763
	CSP Equity	239,376			144,141			40,176			423,693
	Other Investors' Equity	59,281			36,035			140,644			235,960
	Total Liabilities and Equity	$	372,940		$	323,563		$	197,913		$	894,416
	__________
	-1	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke JV that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to January 1, 2009.
	-2	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.
Consolidated Statement of Operations	he following are the statements of operations for our investments in unconsolidated entities for the three months ended March 31, 2015 and March 31, 2014 (in thousands):
		Three Months Ended
		March 31, 2015												March 31, 2014
		Duke JV			European JV			Other (1)			Total			Duke JV			European JV		Other (2)			Total
	Total Revenue	$	12,631		$	6,573		$	(2,334	)	$	16,870		$	14,660		$	7,336	$	(399	)	$	21,597
	Operating Expenses	3,423			1,215			618			5,256			5,036			1,129		745			6,910
	Net Operating Income	9,208			5,358			(2,952		)	11,614			9,624			6,207		(1,144		)	14,687
	Depreciation and Amortization	5,214			2,601			484			8,299			7,516			2,929		523			10,968
	Interest Expense	794			957			—			1,751			1,040			1,133		—			2,173
	Gain on Sale of Real Estate	3,020			—			—			3,020			—			—		—			—
	Loss on Extinguishment of Debt	(73		)	—			—			(73		)	—			—		—			—
	Net Income (Loss)	6,147			1,800			(3,436		)	4,511			1,068			2,145		(1,667		)	1,546
	Company Share in Net Income	4,917			1,439			175			6,531			854			1,716		287			2,857
	Adjustments for REIT basis	(26		)	—			—			(26		)	(31		)	—		—			(31		)
	CSP Equity in Net Income	$	4,891		$	1,439		$	175		$	6,505		$	823		$	1,716	$	287		$	2,826
	__________
	-1	Includes UK JV and CBRE Strategic Partners Asia.
	-2	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.

Deferred_Leasing_Costs_and_Int1

Deferred Leasing Costs and Intangible Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table summarizes our deferred leasing costs and intangible assets, including acquired above-market leases, acquired in-place leases and other intangible assets and intangible liabilities, including acquired below-market leases and acquired above-market ground lease obligations (in thousands):
		March 31,			December 31,
		2015			2014
	Deferred Leasing Costs and Intangible Assets, Net:
	Deferred Leasing Costs	$	22,848		$	22,481
	Accumulated Amortization	(4,961		)	(4,218		)
	Deferred Leasing Costs, Net	17,887			18,263
	Above-Market Leases	63,566			63,566
	Accumulated Amortization	(32,449		)	(30,311		)
	Above-Market Leases, Net	31,117			33,255
	In-Place Leases	300,124			300,124
	Accumulated Amortization	(141,740		)	(132,414		)
	In-Place Leases, Net	158,384			167,710
	Other Intangible Assets	1,425			1,425
	Accumulated Amortization	(199		)	(163		)
	Other Intangible Assets, Net	1,226			1,262
	Total Deferred Leasing Costs and Intangible Assets, Net	$	208,614		$	220,490
	Intangible Liabilities, Net:
	Below-Market Leases	$	51,653		$	51,653
	Accumulated Amortization	(27,838		)	(26,675		)
	Below-Market Leases, Net	23,815			24,978
	Above-Market Ground Lease Obligation	1,501			1,501
	Accumulated Amortization	(249		)	(231		)
	Above-Market Ground Lease Obligation, Net	1,252			1,270
	Total Intangible Liabilities, Net	$	25,067		$	26,248
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The following table sets forth amortization related to intangible assets and liabilities for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Deferred Leasing Costs(1)	$	749		$	354
	Above-Market Leases(2)	2,138			2,515
	In-Place Leases(1)	9,326			9,469
	Other Intangible Assets(1)	36			—
	Below-Market Leases(2)	(1,163		)	(1,033		)
	Above-Market Ground Lease Obligation(3)	(18		)	(18		)
	__________
	-1	The amortization of deferred leasing costs, in-place leases and other intangible assets are recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
	-2	The amortization of above-market leases and below-market leases are recorded as reductions and additions to rental income, respectively, in the consolidated statements of operations for the periods presented.
	-3	The amortization of the above-market ground lease obligation is recorded as a decrease to property operating expense in the consolidated statements of operations for the periods presented.
Schedule of Future Amortization of Acquisition Related Intangible Assets and Liabilities	The following is a schedule of future amortization of deferred leasing costs, intangible assets and liabilities as of March 31, 2015 (in thousands):
		Intangible Assets										Intangible Liabilities
		Deferred Leasing Costs			Acquired			Acquired		Other Intangible Assets		Acquired		Above-Market
					Above-Market			In-Place				Below-Market		Ground Lease
					Leases			Leases				Leases		Obligations
	Remaining 2015	$	1,424		$	6,327		$	27,236	$	108	$	3,368	$	53
	2016	1,750			5,557			29,727		144		3,590		71
	2017	1,604			4,466			25,254		144		3,098		71
	2018	1,531			3,862			21,050		144		2,825		71
	2019	1,332			3,300			17,284		144		2,604		71
	Thereafter	10,246			7,605			37,833		542		8,330		915
		$	17,887		$	31,117		$	158,384	$	1,226	$	23,815	$	1,252

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The terms of our unsecured term loan facilities and outstanding balances as of March 31, 2015 and December 31, 2014 are set forth in the table below (in thousands):
	Term Loan Facility		Unswapped Interest Rate		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
									March 31,			December 31,
									2015			2014
	WF Term Loan #2(2)		LIBOR + 1.50%		2.49%		3/7/18		$	200,000		$	200,000
	WF Term Loan #3(2)		LIBOR + 1.50%		3.12%		1/15/19		200,000			200,000
	TD Term Loan(3)		LIBOR + 1.75%		3.28%		3/6/20		50,000			50,000
	Capital One Term Loan(2)		LIBOR + 1.75%		4.32%		1/31/21		120,000			120,000
	Total Unsecured Term Loan Facilities								$	570,000		$	570,000
	__________
	-1	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the effect of the interest rate swaps, excluding debt issuance costs.
	-2	As of March 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.156%, respectively, for these loans.
	-3	As of March 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.155%, respectively, for this loan.
	Secured notes payable are summarized as follows (in thousands):
	Property		Stated		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
			Interest Rate						March 31,			December 31,
									2015			2014
	Lakeside Office Center		6.03%		6.03%		9/1/15		$	8,585		$	8,617
	Celebration Office Center III(2)		4.25%		2.50%		12/1/15		8,770			8,817
	22535 Colonial Pkwy(2)		4.25%		2.50%		12/1/15		7,847			7,889
	Northpoint III(2)		4.25%		2.50%		12/1/15		10,155			10,209
	Goodyear Crossing II(2)		4.25%		2.50%		12/1/15		19,386			19,489
	3900 North Paramount Parkway(2)		4.25%		2.50%		12/1/15		7,616			7,656
	3900 South Paramount Parkway(2)		4.25%		2.50%		12/1/15		7,616			7,656
	1400 Perimeter Park Drive(2)		4.25%		2.50%		12/1/15		2,308			2,320
	Miramar I(2)		4.25%		2.50%		12/1/15		9,047			9,095
	Miramar II(2)		4.25%		2.50%		12/1/15		12,185			12,250
	70 Hudson Street (3)		5.65%		5.15%		4/11/16		113,570			114,108
	Point West I - Swapped to Fixed		3.41%		3.41%		12/6/16		10,635			10,716
	100 Tice Blvd		5.97%		4.38%		9/15/17		18,808			18,960
	100 Tice Blvd		5.97%		4.38%		9/15/17		18,808			18,960
	4701 Gold Spike Drive(4)		4.45%		4.45%		3/1/18		9,908			9,958
	1985 International Way(4)		4.45%		4.45%		3/1/18		6,883			6,920
	3660 Deerpark Boulevard(4)		4.45%		4.45%		3/1/18		7,117			7,153
	Tolleson Commerce Park II(4)		4.45%		4.45%		3/1/18		4,280			4,301
	20000 S. Diamond Lake Road(4)		4.45%		4.45%		3/1/18		6,233			6,265
	Atrium I - Swapped to Fixed		3.78%		3.78%		5/31/18		21,346			21,580
	McAuley Place		3.98%		3.50%		9/1/18		12,771			12,865
	Easton III - Swapped to Fixed		3.95%		3.95%		1/31/19		6,234			6,280
	90 Hudson Street		5.66%		5.26%		5/1/19		102,880			103,301
	Fairforest Bldg. 6		5.42%		6.50%		6/1/19		1,664			1,751
	North Rhett I		5.65%		6.50%		8/1/19		1,843			1,958
	Kings Mountain II		5.47%		6.50%		1/1/20		3,318			3,467
	1 Rocket Road		6.60%		4.00%		8/1/20		18,413			18,516
	North Rhett II		5.20%		6.50%		10/1/20		1,372			1,425
	Mount Holly Bldg.		5.20%		6.50%		10/1/20		1,372			1,425
	Orangeburg Park Bldg.		5.20%		6.50%		10/1/20		1,395			1,449
	Kings Mountain I		5.27%		6.50%		10/1/20		1,189			1,235
	Ten Parkway North		4.75%		4.75%		1/1/21		11,388			11,469
	Union Cross Bldg. II		5.53%		6.50%		6/1/21		5,570			5,755
	Union Cross Bldg. I		5.50%		6.50%		7/1/21		1,832			1,892
	Property		Stated		Effective Interest Rate(1)		Maturity Date		Outstanding Balance
			Interest Rate						March 31,			December 31,
									2015			2014
	Norman Pointe I		5.24%		3.50%		10/1/21		20,091			20,177
	Norman Pointe II		5.24%		3.50%		10/1/21		22,119			22,214
	The Landings I		5.24%		3.50%		10/1/21		15,120			15,185
	The Landings II		5.24%		3.50%		10/1/21		13,336			13,393
	Fairforest Bldg. 5		6.33%		6.50%		2/1/24		7,522			7,678
	North Rhett IV		5.80%		6.50%		2/1/25		7,719			7,862
	One Wayside Road(5)		5.66%		5.25%		8/1/15		—			12,938
	One Wayside Road(5)		5.92%		5.25%		8/1/15		—			10,854
	Total Secured Notes Payable								568,251			596,008
	Plus Premium								14,291			15,494
Less Discount								(836		)	(894		)
Total Secured Notes Payable, Net								$	581,706		$	610,608
__________
-1	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of any discounts/premiums, excluding debt issuance costs.
-2	These nine loans are cross-collateralized.
-3	In accordance with the provisions of this loan, beginning in February 2015, the property's excess cash proceeds after the payment of debt service, impounds and budgeted operating expenses are being held by the lender until the loan is repaid or the property is re-leased under terms described in the loan agreement.
-4	These five loans are cross-collaterialized.
-5	This loan was paid off in full on February 2, 2015 prior to the maturity date.
The terms of our unsecured revolving credit facility are set forth in the table below (in thousands):
	March 31,				December 31,
	2015				2014
Outstanding Borrowings	$	235,044			$	200,044
Remaining Borrowing Capacity	614,956				649,956
Total Borrowing Capacity	$	850,000			$	850,000
Interest Rate(1)	1.47		%		1.46		%
Facility Fee(2)	30 bps				30 bps
Maturity Date(3)	15-Jan-18				15-Jan-18
__________
-1	Calculated based on one-month LIBOR plus 1.30% as of March 31, 2015 and December 31, 2014.
-2	The facility fee is based on the unsecured revolving credit facility's total borrowing capacity.
-3	We may exercise an option to extend the maturity date by one year.
Schedule of Maturities of Long-term Debt	The minimum principal payments due for our secured notes payable, unsecured term loan facilities and unsecured revolving credit facility are as follows as of March 31, 2015 (in thousands):
	Remaining 2015	$	103,960
	2016	134,612
	2017	46,822
	2018	507,612
	2019	308,768
	Thereafter	271,521
		$	1,373,295

Risk_Management_and_Use_of_Fin1

Risk Management and Use of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Derivative Instruments	The following table sets forth the terms of our interest rate swaps at March 31, 2015 and December 31, 2014 (amounts in thousands):
		Notional Amount								Fair Value						Rate
	Type of Instrument	March 31,				December 31,				March 31,			December 31,			March 31,		December 31,		Index	Maturity
		2015				2014				2015			2014			2015		2014			Date
	Interest Rate Swap(1)	$	10,635			$	10,716			$	(146	)	$	(135	)	1.2	%	1.3	%	LIBOR	12/6/16
	Interest Rate Swap(2)	200,000				200,000				(116		)	1,467			0.8	%	0.8	%	LIBOR	3/7/18
	Interest Rate Swap(1)	21,346				21,580				(478		)	(354		)	1.6	%	1.6	%	LIBOR	5/31/18
	Interest Rate Swap	200,000				200,000				(3,497		)	(1,540		)	1.5	%	1.5	%	LIBOR	1/15/19
	Interest Rate Swap(1)	6,234				6,280				(177		)	(127		)	1.8	%	1.8	%	LIBOR	1/31/19
	Interest Rate Swap(2)	50,000				50,000				(399		)	266			1.4	%	1.4	%	LIBOR	3/6/20
	Interest Rate Swap	120,000				120,000				(7,179		)	(5,543		)	2.4	%	2.4	%	LIBOR	1/31/21
	__________
	-1	We assumed this swap in connection with the purchase of the Duke Portfolio on March 1, 2013. This swap is considered a hedging instrument under ASC 815-20 as of March 31, 2015. The swap was not considered a hedging instrument under ASC 815-20 during the period from March 1, 2013 to March 31, 2013.
	-2	We entered into these swaps in connection with the origination of the TD Term Loan and WF Term Loan #1 in March 2013. These swaps are considered hedging instruments under ASC 815-20 as of March 31, 2015. These swaps were not considered hedging instruments under ASC 815-20 during the period from March 11, 2013 and March 12, 2013, respectively, to May 29, 2013.
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The asset and liability balances presented in the table below reflect the gross amounts of derivatives recorded in the consolidated balance sheets (in thousands):
		Asset Derivatives										Liability Derivatives
				Fair Value									Fair Value
				March 31,				December 31,					March 31,			December 31,
	Type of Instrument	Balance Sheet Location		2015				2014				Balance Sheet Location	2015			2014
	Derivatives designated as hedging instruments
	Interest Rate Swaps	Prepaid Expenses and Other Assets		$	—			$	1,733			Accounts Payable, Accrued Expenses and Other Liabilities	$	11,992		$	7,699
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The table below presents the effect of our derivative instruments on our consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015				2014
	Derivatives Designated as Cash Flow Hedges:
	Gain (Loss) Recognized in Other Comprehensive Income (OCI) (Effective Portion)	$	(8,188	)		$	(5,089	)
	Loss Reclassified from AOCI into Interest Expense (Effective Portion)	(2,145		)		(2,328		)
	Net Change in Fair Value of Derivative Financial Instruments (Ineffective Portion and Amount Excluded from Effectiveness Testing)	17				26

Future_Minimum_Rents_Tables

Future Minimum Rents (Tables)	3 Months Ended
	Mar. 31, 2015
Leases [Abstract]
Schedule of Minimum Future Rents to be Received on Non-cancelable Operating Leases	The following is a schedule of future minimum rents to be received on non-cancelable operating leases from consolidated properties as of March 31, 2015 (in thousands):
	Remaining 2015	$	162,143
	2016	197,435
	2017	185,133
	2018	168,162
	2019	149,110
	Thereafter	463,068
		$	1,325,051

Equity_Incentive_Plan_and_Perf1

Equity Incentive Plan and Performance Bonus Plan (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing model:
			Assumptions
	Fair value per unit at March 13, 2015		$	6
	Expected share price volatility		22		%
	Dividend yield		6		%
	Risk-free interest rate		0.99		%
	Remaining expected life		2.8 years
Summary of Time-Based Restricted Common Shares	A summary of our Time-Based Restricted Common Shares from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested Restricted Stock
		Common Shares			Weighted-Average
					Grant Date
					Fair Value
					per Share
	Outstanding at January 1, 2015	800,699			$	8.68
	Granted(1)	200,000			8.1
	Vested(1)(2)	(728,963	)		8.5
	Outstanding at March 31, 2015	271,736			$	8.53
	__________
	-1	Shares granted to Mr. Cuneo were fully vested upon his retirement.
	-2	Total shares vested include 331,485 common shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the restricted common shares that have vested. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
Summary of Time-Based Restricted Share Units	A summary of our Time-Based Restricted Share Units from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested RSUs
		Amount			Weighted-Average Grant Date Fair Value Per Share			Vested RSUs		Total RSUs
	Outstanding at January 1, 2015	—			$	—		—		—
	Granted	237,422			7.78			—		237,422
	Vested	(75,000	)		7.78			75,000		—
	Settled(1)	—			—			(75,000	)	(75,000	)
	Outstanding at March 31, 2015	162,422			$	7.78		—		162,422
	__________
	-1	Represents vested RSUs that were settled in shares of the Company's common shares. Total shares settled include 38,806 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the RSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
Summary of Performance Share Units	A summary of our Performance Share Units from January 1, 2015 through March 31, 2015 is presented below:
		Nonvested PSUs
		Amount			Weighted-Average Grant Date Fair Value Per Share			Vested PSUs		Total PSUs
	Outstanding at January 1, 2015	—			$	—		—		—
	Granted	237,440			6.56			—		237,440
	Vested	(75,000	)		7.78			75,000		—
	Settled(1)	—			—			(75,000	)	(75,000	)
	Outstanding at March 31, 2015	162,440			$	6		—		162,440
	__________
	-1	Represents vested PSUs that were settled in shares of the Company's common shares. Total shares settled include 38,888 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the PSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.
Summary of Compensation Expense and Details
		2015				2014
		(in thousands, except share data)
	Compensation Expense Recorded During the Three Months Ended March 31(1)	$	4,038			$	1,012
	Unamortized Compensation Costs	$	4,269			$	8,263
	Shares Available for the Future Awards(2)	3,330,631				4,019,075
	__________
	-1	2015 compensation expense includes severance expense totaling $3.3 million.
	-2	Shares available for the future awards includes units under our 2013 Equity Incentive Plan.

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Components of Accumulated Other Comprehensive Income	The following presents the changes in the balances of each component of accumulated other comprehensive income (loss) for the three months ended March 31, 2015 and 2014 (in thousands):
		Foreign Currency			Swap Fair Value			Accumulated
		Translation Gain (Loss)			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2015	$	(17,513	)	$	(5,756	)	$	(23,269	)
	Other Comprehensive Loss Before Reclassifications	(18,736		)	(8,188		)	(26,924		)
	Amounts Reclassified from Accumulated Other Comprehensive Income to Interest Expense	—			2,145			2,145
	Balance at March 31, 2015	$	(36,249	)	$	(11,799	)	$	(48,048	)
		Foreign Currency			Swap Fair Value			Accumulated
		Translation Gain			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2014	$	1,670		$	2,926		$	4,596
	Other Comprehensive Income (Loss) Before Reclassifications	823			(5,089		)	(4,266		)
	Amounts reclassified from Accumulated Other Comprehensive Income to Interest Expense	—			2,328			2,328
	Balance at March 31, 2014	$	2,493		$	165		$	2,658

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments and Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis	The following items are measured at fair value on a recurring basis and non-recurring basis at March 31, 2015 and December 31, 2014 (in thousands):
		As of March 31, 2015
		Fair Value Measurements Using:
		Quoted				Significant			Significant			Total
		Markets				Observable			Unobservable			Fair Value
		Prices				Inputs			Inputs
		(Level 1)				(Level 2)			(Level 3)
	Assets (Liabilities)
	Cash and Cash Equivalents	$	1,574			$	—		$	—		$	1,574
	Interest Rate Swaps Designated as Cash Flow Hedges - Assets	—				—			—			—
	Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	—				(11,992		)	—			(11,992		)
	Investment in CBRE Strategic Partners Asia	—				—			6,684			6,684
		As of December 31, 2014
		Fair Value Measurements Using:
		Quoted				Significant			Significant			Total
		Markets				Observable			Unobservable			Fair Value
		Prices				Inputs			Inputs
		(Level 1)				(Level 2)			(Level 3)
	Assets (Liabilities)
	Cash and Cash Equivalents	$	1,573			$	—		$	—		$	1,573
	Interest Rate Swaps Designated as Cash Flow Hedges - Assets	—				1,733			—			1,733
	Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	—				(7,699		)	—			(7,699		)
	Investment in CBRE Strategic Partners Asia	—				—			6,870			6,870
	Fair Value of Real Estate at Impairment(1)	—				—			94,000			94,000
	__________
	-1	Represents a non-recurring fair value measurement.
Investment in CBRE Strategic Partners Asia Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)	The following table presents our activity for our investment in CBRE Strategic Partners Asia measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2015 and 2014, respectively (in thousands):
	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)		Investment in
			CBRE Strategic
			Partners Asia
	Balance at January 1, 2015		$	6,870
	Translation Adjustment in Other Comprehensive Income		(186		)
	Balance at March 31, 2015		$	6,684
	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)		Investment in
			CBRE Strategic
			Partners Asia
	Balance at January 1, 2014		$	9,676
	Total Loss on Fair Value Adjustment		(112		)
	Balance at March 31, 2014		$	9,564
Summary of Notes Payable and Estimated Fair Value	For disclosure purposes only, the following table summarizes our notes payable and their estimated fair value at March 31, 2015 and December 31, 2014 (in thousands):
			March 31, 2015							31-Dec-14
	Financial Instrument		Carrying				Fair			Carrying			Fair
			Value				Value			Value			Value
	Secured Notes Payable(1)		$	581,706			$	603,775		$	610,608		$	628,194
	Unsecured Term Loan Facilities(1)		$	570,000			$	584,654		$	570,000		$	577,196
	Unsecured Revolving Credit Facility(1)		$	235,044			$	235,044		$	200,044		$	200,044
	__________
	-1	Items are measured using Level 2 inputs.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Minimum Commitment Under Ground Lease	The minimum commitment under the ground lease as of March 31, 2015 and thereafter is as follows (in thousands):
	Remaining 2015	$	205
	2016	273
	2017	273
	2018	276
	2019	308
	Thereafter	4,474
		$	5,809

Segment_Disclosure_Tables

Segment Disclosure (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Comparison of Net Operating Income	The following table compares the net operating income for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Industrial Properties
	Revenues:
	Rental	$	18,386		$	14,145
	Tenant Reimbursements	4,948			3,721
	Other Property Income	198			—
	Total Revenues	23,532			17,866
	Property and Related Expenses:
	Property Operating	1,872			1,491
	Real Estate Taxes	3,832			3,129
	Total Property and Related Expenses	5,704			4,620
	Net Operating Income	$	17,828		$	13,246
	Office Properties
	Revenues:
	Rental	$	35,960		$	36,700
	Tenant Reimbursements	11,491			11,476
	Other Property Income	—			1,069
	Total Revenues	47,451			49,245
	Property and Related Expenses:
	Property Operating	7,909			8,002
	Real Estate Taxes	6,950			6,672
	Total Property and Related Expenses	14,859			14,674
	Net Operating Income	$	32,592		$	34,571
	Non-Reportable Properties
	Revenues:
	Rental	$	—		$	1,031
	Tenant Reimbursements	—			23
	Total Revenues	—			1,054
	Property and Related Expenses:
	Property Operating	—			60
	Real Estate Taxes	—			—
	Total Property and Related Expenses	—			60
	Net Operating Income	$	—		$	994
Reconciliation to Consolidated Net Income (Loss)
		Three Months Ended
		March 31,
		2015			2014
	Reconciliation to Consolidated Net Income
	Total Segment Net Operating Income	$	50,420		$	48,811
	Expenses:
	General and Administrative	9,873			6,864
	Acquisition-Related	—			290
	Depreciation and Amortization	27,920			27,238
	Total Expenses	37,793			34,392
	Income Before Other (Expenses) Income	12,627			14,419
	Other Expenses and Income
	Interest and Other Income	80			167
	Interest Expense	(13,059		)	(14,061		)
	Interest Expense and Net Change in Fair Value of Non-Qualifying Derivative Financial Instruments	17			26
	(Loss) Income Before Provision for Income Taxes and Equity in Income of Unconsolidated Entities	(335		)	551
	Provision for Income Taxes	(176		)	(58		)
	Equity in Income of Unconsolidated Entities	6,505			2,826
	Net Income	$	5,994		$	3,319
Condensed Assets
		March 31,			December 31,
	Assets	2015			2014
	Industrial Properties	$	915,999		$	916,038
	Office Properties	1,491,098			1,504,285
	Non-Segment Assets(1)	420,070			449,485
	Total Assets	$	2,827,167		$	2,869,808
	_________
	-1	Non-segment assets primarily include our investments in unconsolidated entities.

Earnings_per_Share_Tables

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles the numerator and denominator in computing the Company's basic and diluted per-share computations for net income for the three months ended March 31, 2015 and 2014 is as follows (in thousands except share data):
		Three Months Ended
		March 31,
		2015			2014
	Numerator:
	Net Income	$	5,994		$	3,319
	Allocation to Participating Securities (Nonvested Restricted Shares and Vested RSUs)	(40		)	(127		)
	Numerator for Basic and Diluted Net Income	$	5,954		$	3,192
	Denominator:
	Basic Weighted Average Shares Outstanding	236,940,134			236,583,752
	Effect of Dilutive Securities - Non-Vested Time-Based RSUs	23,220			—
	Diluted Weighted Average Shares Outstanding	236,963,354			236,583,752
	Basic and Diluted Earnings Per Share:
	Net Income per Share	$	0.03		$	0.01

Organization_and_Nature_of_Bus1

Organization and Nature of Business - Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
	Property	Property
	entity
	country
Schedule of Equity Method Investments [Line Items]
Common shares, par value	$0.01	$0.01
Number of Real Estate Properties	28	29
Equity Method Investments, Unconsolidated Entities, Number	4
Number of Countries in Which Unconsolidated Properties Located	3
Unconsolidated Properties
Schedule of Equity Method Investments [Line Items]
Number of Real Estate Properties	25
Net Rentable Area	12,300,000
Percentage Of Area Leased Property	99.90%
Number Of States In Which Unconsolidated Properties Located	7
Triple Net Lease, Single Tenant Properties | Unconsolidated Properties
Schedule of Equity Method Investments [Line Items]
Net Rentable Area	11,500,000
Property Subject to or Available for Operating Lease, Number of Units	20
CSP OP
Schedule of Equity Method Investments [Line Items]
Interest owned	100.00%
Consolidated Entities
Schedule of Equity Method Investments [Line Items]
Number of Real Estate Properties	102
Number Of States In Which Consolidated Properties Located	18
Net Rentable Area	25,300,000
Percentage Of Area Leased Property	97.60%
Consolidated Entities | Triple Net Lease, Single Tenant Properties
Schedule of Equity Method Investments [Line Items]
Net Rentable Area	20,600,000
Property Subject to or Available for Operating Lease, Number of Units	77

Basis_of_Presentation_and_Summ2

Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	segment
Schedule of Equity Method Investments [Line Items]
Number of reportable segments	2
Irrevocable stand-by letters of credit	$20,300,000		$20,300,000
Allowance for uncollectible rent receivable	18,000		62,000
Income Tax Expense (Benefit)	176,000	58,000
United Kingdom
Schedule of Equity Method Investments [Line Items]
Exchange rate	1.4819		1.5576
Profit and loss weighted average exchange rate	1.5357	1.6586
Deferred tax assets	600,000
Valuation allowance	$600,000
European
Schedule of Equity Method Investments [Line Items]
Exchange rate	1.0732		1.2099
Profit and loss weighted average exchange rate	1.1513	1.3679
Foreign Tax Authority
Schedule of Equity Method Investments [Line Items]
Statutory tax rate on real property operating results	20.00%

Investment_in_Real_Estate_Acti1

Investment in Real Estate Activity - Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Real Estate Properties [Line Items]
Real Estate Investment Property, at Cost	$2,340,794	$2,329,163
Undeveloped Parcel in Phoenix, AZ
Real Estate Properties [Line Items]
Area of Land	11.8
Real Estate Investment Property, at Cost	$1,700

Investments_in_Unconsolidated_2

Investments in Unconsolidated Entities - Narrative (Details) (USD $)	0 Months Ended
In Millions, unless otherwise specified	Jan. 23, 2015	Jan. 23, 2015
Equity Method Investments and Joint Ventures [Abstract]
Gross sales price of investment real estate		$20.60
Sales of real estate property	16.4
Gain on sale of real estate	$2

Investments_in_Unconsolidated_3

Investments in Unconsolidated Entities - Properties (Details)	Mar. 31, 2015	Dec. 31, 2014
	Property	Property
Schedule of Equity Method Investments [Line Items]
Number of Properties	28	29
Duke Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership %	80.00%
Number of Properties	13	14
European JV
Schedule of Equity Method Investments [Line Items]
Ownership %	80.00%
Number of Properties	9	9
UK JV
Schedule of Equity Method Investments [Line Items]
Ownership %	80.00%
Number of Properties	3	3
CBRE Strategic Partners Asia
Schedule of Equity Method Investments [Line Items]
Ownership %	5.07%
Number of Properties	3	3

Investments_in_Unconsolidated_4

Investments in Unconsolidated Entities - Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$394,738	$423,693	$514,802
Duke Joint Venture
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	230,861	239,376
European JV
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	125,853	144,141
UK JV
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	31,223	33,189
Afton Ridge Joint Venture
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	117	117
CBRE Strategic Partners Asia
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$6,684	$6,870

Investments_in_Unconsolidated_5

Investments in Unconsolidated Entities - Investments Roll Forward (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investments in Unconsolidated Entities [Roll Forward]
Investment Balance, January 1	$423,693	$514,802	$514,802
Contributions	0		7,625
CSP Equity in Net Income	6,505	2,826	28,823
Other Comprehensive Loss of Unconsolidated Entities	-17,828		-22,342
Distributions	-17,632		-105,215
Investment Balance, End of Period	$394,738		$423,693

Investments_in_Unconsolidated_6

Investments in Unconsolidated Entities - Consolidated Balance Sheet (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Assets
Assets	$830,799		$894,416
Liabilities and Equity
Liabilities	210,989		234,763
CSP Equity	394,738		423,693
Other Investors' Equity	225,072		235,960
Total Liabilities and Equity	830,799		894,416
Investments in Real Estate
Assets
Assets	745,426	[1]	783,724	[2]
Real Estate Investments and Other Assets Held-for-Sale
Assets
Assets			17,230
Other Assets
Assets
Assets	85,373		93,462
Liabilities Related to Real Estate Investments Held-for-Sale
Liabilities and Equity
Liabilities			11,048
Secured Note Payable, net
Liabilities and Equity
Liabilities	176,845		192,395
Other Liabilities
Liabilities and Equity
Liabilities	34,144		31,320
Duke Joint Venture
Assets
Assets	352,549		372,940
Liabilities and Equity
Liabilities	64,529		74,283
CSP Equity	230,861		239,376
Other Investors' Equity	57,159		59,281
Total Liabilities and Equity	352,549		372,940
Duke Joint Venture | Investments in Real Estate
Assets
Assets	319,663	[1]	323,236	[2]
Duke Joint Venture | Real Estate Investments and Other Assets Held-for-Sale
Assets
Assets			17,230
Duke Joint Venture | Other Assets
Assets
Assets	32,886		32,474
Duke Joint Venture | Liabilities Related to Real Estate Investments Held-for-Sale
Liabilities and Equity
Liabilities			11,048
Duke Joint Venture | Secured Note Payable, net
Liabilities and Equity
Liabilities	56,948		57,222
Duke Joint Venture | Other Liabilities
Liabilities and Equity
Liabilities	7,581		6,013
European JV
Assets
Assets	283,626		323,563
Liabilities and Equity
Liabilities	126,310		143,387
CSP Equity	125,853		144,141
Other Investors' Equity	31,463		36,035
Total Liabilities and Equity	283,626		323,563
European JV | Investments in Real Estate
Assets
Assets	241,518	[1]	274,128	[2]
European JV | Real Estate Investments and Other Assets Held-for-Sale
Assets
Assets			0
European JV | Other Assets
Assets
Assets	42,108		49,435
European JV | Liabilities Related to Real Estate Investments Held-for-Sale
Liabilities and Equity
Liabilities			0
European JV | Secured Note Payable, net
Liabilities and Equity
Liabilities	119,897		135,173
European JV | Other Liabilities
Liabilities and Equity
Liabilities	6,413		8,214
Other
Assets
Assets	194,624	[3]	197,913	[4]
Liabilities and Equity
Liabilities	20,150	[3]	17,093	[4]
CSP Equity	38,024	[3]	40,176	[4]
Other Investors' Equity	136,450	[3]	140,644	[4]
Total Liabilities and Equity	194,624	[3]	197,913	[4]
Other | Investments in Real Estate
Assets
Assets	184,245	[1],[3]	186,360	[2],[4]
Other | Real Estate Investments and Other Assets Held-for-Sale
Assets
Assets			0	[4]
Other | Other Assets
Assets
Assets	10,379	[3]	11,553	[4]
Other | Liabilities Related to Real Estate Investments Held-for-Sale
Liabilities and Equity
Liabilities			0	[4]
Other | Secured Note Payable, net
Liabilities and Equity
Liabilities	0	[3]	0	[4]
Other | Other Liabilities
Liabilities and Equity
Liabilities	$20,150	[3]	$17,093	[4]
[1]	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke/Hulfish, LLC joint venture (the "Duke JV") that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to JanuaryB 1, 2009.
[2]	Includes REIT Basis Adjustments for costs incurred by the Company outside of the Duke JV that are directly capitalizable to its investment in real estate assets acquired, including acquisition costs paid to our former investment advisor prior to JanuaryB 1, 2009.
[3]	Includes the Goodman Princeton Holdings (Jersey) Limited joint venture (the "UK JV") and CBRE Strategic Partners Asia.
[4]	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.

Investments_in_Unconsolidated_7

Investments in Unconsolidated Entities - Consolidated Statements of Operations (Details) (USD $)	3 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Total Revenue	$16,870		$21,597
Operating Expenses	5,256		6,910
Net Operating Income	11,614		14,687
Depreciation and Amortization	8,299		10,968
Gain on Sale of Real Estate	3,020		0
Loss on Extinguishment of Debt	-73		0
Interest Expense	1,751		2,173
Net Income (Loss)	4,511		1,546
Company Share in Net Income	6,531		2,857
Adjustments for REIT basis	-26		-31
Income (Loss) from Equity Method Investments	6,505		2,826		28,823
Duke Joint Venture
Schedule of Equity Method Investments [Line Items]
Total Revenue	12,631		14,660
Operating Expenses	3,423		5,036
Net Operating Income	9,208		9,624
Depreciation and Amortization	5,214		7,516
Gain on Sale of Real Estate	3,020
Loss on Extinguishment of Debt	-73
Interest Expense	794		1,040
Net Income (Loss)	6,147		1,068
Company Share in Net Income	4,917		854
Adjustments for REIT basis	-26		-31
Income (Loss) from Equity Method Investments	4,891		823
European JV
Schedule of Equity Method Investments [Line Items]
Total Revenue	6,573		7,336
Operating Expenses	1,215		1,129
Net Operating Income	5,358		6,207
Depreciation and Amortization	2,601		2,929
Gain on Sale of Real Estate	0
Loss on Extinguishment of Debt	0
Interest Expense	957		1,133
Net Income (Loss)	1,800		2,145
Company Share in Net Income	1,439		1,716
Adjustments for REIT basis	0		0
Income (Loss) from Equity Method Investments	1,439		1,716
Other
Schedule of Equity Method Investments [Line Items]
Total Revenue	-2,334	[1]	-399	[2]
Operating Expenses	618	[1]	745	[2]
Net Operating Income	-2,952	[1]	-1,144	[2]
Depreciation and Amortization	484	[1]	523	[2]
Gain on Sale of Real Estate	0
Loss on Extinguishment of Debt	0
Interest Expense	0	[1]	0	[2]
Net Income (Loss)	-3,436	[1]	-1,667	[2]
Company Share in Net Income	175	[1]	287	[2]
Adjustments for REIT basis	0	[1]	0	[2]
Income (Loss) from Equity Method Investments	$175	[1]	$287	[2]
[1]	Includes UK JV and CBRE Strategic Partners Asia.
[2]	Includes UK JV, Afton Ridge, and CBRE Strategic Partners Asia.

Deferred_Leasing_Costs_and_Int2

Deferred Leasing Costs and Intangible Assets and Liabilities - Summary of Deferred Leasing Costs and Intangible Assets (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Intangible Assets, net:
Total	$208,614	$220,490
Intangible Liabilities, net:
Below Market Lease, Gross	51,653	51,653
Below Market Lease, Accumulated Amortization	-27,838	-26,675
Acquired Intangible Liabilities, Net	23,815	24,978
Above-Market Ground Lease Obligation	1,501	1,501
Above Market Ground Leases Obligation Accumulated Amortization	-249	-231
Above Market Ground Lease Obligation, Net	1,252	1,270
Intangible Liabilities, Net	25,067	26,248
Deferred Leasing Costs
Intangible Assets, net:
Finite-Lived Intangible Assets, Gross	22,848	22,481
Finite-Lived Intangible Assets, Accumulated Amortization	-4,961	-4,218
Total	17,887	18,263
Above-Market Leases
Intangible Assets, net:
Finite-Lived Intangible Assets, Gross	63,566	63,566
Finite-Lived Intangible Assets, Accumulated Amortization	-32,449	-30,311
Total	31,117	33,255
Acquired In-Place Leases
Intangible Assets, net:
Finite-Lived Intangible Assets, Gross	300,124	300,124
Finite-Lived Intangible Assets, Accumulated Amortization	-141,740	-132,414
Total	158,384	167,710
Other Intangible Assets
Intangible Assets, net:
Finite-Lived Intangible Assets, Gross	1,425	1,425
Finite-Lived Intangible Assets, Accumulated Amortization	-199	-163
Total	$1,226	$1,262

Deferred_Leasing_Costs_and_Int3

Deferred Leasing Costs and Intangible Assets and Liabilities - Amortization of Intangible Assets and Liabilities (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Deferred Leasing Costs
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	$749	[1]	$354	[1]
Above-Market Leases
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	2,138	[2]	2,515	[2]
Acquired In-Place Leases
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	9,326	[1]	9,469	[1]
Other Intangible Assets
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	36	[1]	0	[1]
Below-Market Lease Value
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	-1,163	[2]	-1,033	[2]
Above-Market Ground Lease Obligations
Intangible Assets Goodwill And Other Assets [Line Items]
Amortization leases	($18)	[3]	($18)	[3]
[1]	The amortization of deferred leasing costs, in-place leases and other intangible assets are recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
[2]	The amortization of above-market leases and below-market leases are recorded as reductions and additions to rental income, respectively, in the consolidated statements of operations for the periods presented
[3]	The amortization of the above-market ground lease obligation is recorded as a decrease to property operating expense in the consolidated statements of operations for the periods presented.

Deferred_Leasing_Costs_and_Int4

Deferred Leasing Costs and Intangible Assets and Liabilities - Schedule of Future Amortization of Acquisition Related Intangible Assets and Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Acquired Indefinite-lived Intangible Assets [Line Items]
Total	$208,614	$220,490
Deferred Leasing Costs
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	1,424
2016	1,750
2017	1,604
2018	1,531
2019	1,332
Thereafter	10,246
Total	17,887	18,263
Acquired Above-Market Leases
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	6,327
2016	5,557
2017	4,466
2018	3,862
2019	3,300
Thereafter	7,605
Total	31,117
Acquired In-Place Leases
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	27,236
2016	29,727
2017	25,254
2018	21,050
2019	17,284
Thereafter	37,833
Total	158,384	167,710
Other Intangible Assets
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	108
2016	144
2017	144
2018	144
2019	144
Thereafter	542
Total	1,226	1,262
Acquired Below-Market Leases
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	3,368
2016	3,590
2017	3,098
2018	2,825
2019	2,604
Thereafter	8,330
Total	23,815
Above-Market Ground Lease Obligations
Acquired Indefinite-lived Intangible Assets [Line Items]
Remaining 2015	53
2016	71
2017	71
2018	71
2019	71
Thereafter	915
Total	$1,252

Debt_Notes_Payable_Secured_by_

Debt - Notes Payable Secured by Real Property (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Outstanding Balance	$581,706		$610,608
Total Secured Notes Payable	568,251		596,008
Plus Premium	14,291		15,494
Less Discount	-836		-894
Total Secured Notes Payable, Net	581,706		610,608
Lakeside Office Center
Debt Instrument [Line Items]
Stated Interest Rate	6.03%
Effective Interest Rate	6.03%	[1]
Maturity Date	1-Sep-15
Outstanding Balance	8,585		8,617
Celebration Office Center
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	8,770	[2]	8,817	[2]
22535 Colonial Pkwy
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	7,847	[2]	7,889	[2]
Northpoint III
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	10,155	[2]	10,209	[2]
Goodyear Crossing Ind. Park II
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	19,386	[2]	19,489	[2]
3900 North Paramount Parkway
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	7,616	[2]	7,656	[2]
3900 South Paramount Parkway
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	7,616	[2]	7,656	[2]
1400 Perimeter Park Drive
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	2,308	[2]	2,320	[2]
Miramar I
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	9,047	[2]	9,095	[2]
Miramar II
Debt Instrument [Line Items]
Stated Interest Rate	4.25%	[2]
Effective Interest Rate	2.50%	[1],[2]
Maturity Date	1-Dec-15	[2]
Outstanding Balance	12,185	[2]	12,250	[2]
70 Hudson Street
Debt Instrument [Line Items]
Stated Interest Rate	5.65%	[3]
Effective Interest Rate	5.15%	[1],[3]
Maturity Date	11-Apr-16	[3]
Outstanding Balance	113,570	[3]	114,108	[3]
Point West I
Debt Instrument [Line Items]
Stated Interest Rate	3.41%
Effective Interest Rate	3.41%	[1]
Maturity Date	6-Dec-16
Outstanding Balance	10,635		10,716
100 Tice Blvd 1
Debt Instrument [Line Items]
Stated Interest Rate	5.97%
Effective Interest Rate	4.38%	[1]
Maturity Date	15-Sep-17
Outstanding Balance	18,808		18,960
100 Tice Blvd 2
Debt Instrument [Line Items]
Stated Interest Rate	5.97%
Effective Interest Rate	4.38%	[1]
Maturity Date	15-Sep-17
Outstanding Balance	18,808		18,960
4701 Gold Spike Drive
Debt Instrument [Line Items]
Stated Interest Rate	4.45%	[4]
Effective Interest Rate	4.45%	[1],[4]
Maturity Date	1-Mar-18	[4]
Outstanding Balance	9,908	[4]	9,958	[4]
1985 International Way
Debt Instrument [Line Items]
Stated Interest Rate	4.45%	[4]
Effective Interest Rate	4.45%	[1],[4]
Maturity Date	1-Mar-18	[4]
Outstanding Balance	6,883	[4]	6,920	[4]
3660 Deerpark Blvd
Debt Instrument [Line Items]
Stated Interest Rate	4.45%	[4]
Effective Interest Rate	4.45%	[1],[4]
Maturity Date	1-Mar-18	[4]
Outstanding Balance	7,117	[4]	7,153	[4]
Tolleson Commerce Park II
Debt Instrument [Line Items]
Stated Interest Rate	4.45%	[4]
Effective Interest Rate	4.45%	[1],[4]
Maturity Date	1-Mar-18	[4]
Outstanding Balance	4,280	[4]	4,301	[4]
20000 S Diamond Lake Road
Debt Instrument [Line Items]
Stated Interest Rate	4.45%	[4]
Effective Interest Rate	4.45%	[1],[4]
Maturity Date	1-Mar-18	[4]
Outstanding Balance	6,233	[4]	6,265	[4]
Atrium I
Debt Instrument [Line Items]
Stated Interest Rate	3.78%
Effective Interest Rate	3.78%	[1]
Maturity Date	31-May-18
Outstanding Balance	21,346		21,580
McAuley Place
Debt Instrument [Line Items]
Stated Interest Rate	3.98%
Effective Interest Rate	3.50%	[1]
Maturity Date	1-Sep-18
Outstanding Balance	12,771		12,865
Easton III
Debt Instrument [Line Items]
Stated Interest Rate	3.95%
Effective Interest Rate	3.95%	[1]
Maturity Date	31-Jan-19
Outstanding Balance	6,234		6,280
90 Hudson Street
Debt Instrument [Line Items]
Stated Interest Rate	5.66%
Effective Interest Rate	5.26%	[1]
Maturity Date	1-May-19
Outstanding Balance	102,880		103,301
Fairforest Bldg. 6
Debt Instrument [Line Items]
Stated Interest Rate	5.42%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Jun-19
Outstanding Balance	1,664		1,751
North Rhett I
Debt Instrument [Line Items]
Stated Interest Rate	5.65%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Aug-19
Outstanding Balance	1,843		1,958
Kings Mountain II
Debt Instrument [Line Items]
Stated Interest Rate	5.47%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Jan-20
Outstanding Balance	3,318		3,467
One Rocket Road
Debt Instrument [Line Items]
Stated Interest Rate	6.60%
Effective Interest Rate	4.00%	[1]
Maturity Date	1-Aug-20
Outstanding Balance	18,413		18,516
North Rhett II
Debt Instrument [Line Items]
Stated Interest Rate	5.20%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Oct-20
Outstanding Balance	1,372		1,425
Mt Holly Bldg.
Debt Instrument [Line Items]
Stated Interest Rate	5.20%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Oct-20
Outstanding Balance	1,372		1,425
Orangeburg Park Bldg.
Debt Instrument [Line Items]
Stated Interest Rate	5.20%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Oct-20
Outstanding Balance	1,395		1,449
Kings Mountain I
Debt Instrument [Line Items]
Stated Interest Rate	5.27%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Oct-20
Outstanding Balance	1,189		1,235
Ten Parkway North
Debt Instrument [Line Items]
Stated Interest Rate	4.75%
Effective Interest Rate	4.75%	[1]
Maturity Date	1-Jan-21
Outstanding Balance	11,388		11,469
Union Cross Bldg. II
Debt Instrument [Line Items]
Stated Interest Rate	5.53%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Jun-21
Outstanding Balance	5,570		5,755
Union Cross Bldg. I
Debt Instrument [Line Items]
Stated Interest Rate	5.50%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Jul-21
Outstanding Balance	1,832		1,892
Norman Pointe I
Debt Instrument [Line Items]
Stated Interest Rate	5.24%
Effective Interest Rate	3.50%	[1]
Maturity Date	1-Oct-21
Outstanding Balance	20,091		20,177
Norman Pointe II
Debt Instrument [Line Items]
Stated Interest Rate	5.24%
Effective Interest Rate	3.50%	[1]
Maturity Date	1-Oct-21
Outstanding Balance	22,119		22,214
The Landings I
Debt Instrument [Line Items]
Stated Interest Rate	5.24%
Effective Interest Rate	3.50%	[1]
Maturity Date	1-Oct-21
Outstanding Balance	15,120		15,185
The Landings II
Debt Instrument [Line Items]
Stated Interest Rate	5.24%
Effective Interest Rate	3.50%	[1]
Maturity Date	1-Oct-21
Outstanding Balance	13,336		13,393
Fairforest Bldg. 5
Debt Instrument [Line Items]
Stated Interest Rate	6.33%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Feb-24
Outstanding Balance	7,522		7,678
North Rhett IV
Debt Instrument [Line Items]
Stated Interest Rate	5.80%
Effective Interest Rate	6.50%	[1]
Maturity Date	1-Feb-25
Outstanding Balance	7,719		7,862
One Wayside Road 1
Debt Instrument [Line Items]
Stated Interest Rate	5.66%	[5]
Effective Interest Rate	5.25%	[1],[5]
Maturity Date	1-Aug-15	[5]
Outstanding Balance	0	[5]	12,938	[5]
One Wayside Road 2
Debt Instrument [Line Items]
Stated Interest Rate	5.92%	[5]
Effective Interest Rate	5.25%	[1],[5]
Maturity Date	1-Aug-15	[5]
Outstanding Balance	$0	[5]	$10,854	[5]
[1]	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of any discounts/premiums, excluding debt issuance costs.
[2]	These nine loans are cross-collateralized.
[3]	{F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmVjNmY3MzFmYzQ5NDQwNDZiYWEyMTNiY2YyMWQzZGJkfFRleHRTZWxlY3Rpb246NUUzMEM0RTRCRjQ2NTZEQzg3NTA1NzZBRjhBNjZBRTEM}
[4]	These five loans are cross-collaterialized.
[5]	This loan was paid off in full on February 2, 2015 prior to the maturity date.

Debt_Notes_Payable_Secured_by_1

Debt - Notes Payable Secured by Real Property (Footnotes) (Details)	Mar. 31, 2015
	SecurityLoan
Loan Group Maturity Date December 1, 2015
Debt Instrument [Line Items]
Number of loan cross-collateralized by properties	9
Loan Group Maturity Date March 1, 2018
Debt Instrument [Line Items]
Number of loan cross-collateralized by properties	5

Debt_Notes_Payable_Unsecured_T

Debt - Notes Payable - Unsecured Term Loan Facilities (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Outstanding borrowings	$570,000			$570,000
WF Term Loan 2
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.50%
Interest rate	2.49%	[1],[2]
Outstanding borrowings	200,000	[1]		200,000	[1]
Long Term Debt, LIBOR Rate	0.17%		0.16%
WF Term Loan 3
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.50%
Interest rate	3.12%	[1],[2]
Outstanding borrowings	200,000	[1]		200,000	[1]
Long Term Debt, LIBOR Rate			0.16%
TD Term Loan
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.75%
Interest rate	3.28%	[2],[3]
Outstanding borrowings	50,000	[3]		50,000	[3]
Capital One Term Loan
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.75%
Interest rate	4.32%	[1],[2]
Outstanding borrowings	$120,000	[1]		$120,000	[1]
[1]	As of MarchB 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.156%, respectively, for these loans
[2]	Represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the effect of the interest rate swaps, excluding debt issuanceB costs.
[3]	As of MarchB 31, 2015 and December 31, 2014, the applicable LIBOR rate was 0.172% and 0.155%, respectively, for this loan.

Debt_Notes_Payable_Unsecured_C

Debt - Notes Payable - Unsecured Credit Facility (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2013	Dec. 31, 2014
Line of Credit Facility [Line Items]
Outstanding borrowings	$570,000				$570,000
Revolving credit facility
Line of Credit Facility [Line Items]
Outstanding borrowings	235,044					200,044
Remaining borrowing capacity	614,956					649,956
Total borrowing capacity	$850,000					$850,000
Interest rate	1.47%	[1]				1.46%	[1]
Facility Fee	0.30%	[2]	0.30%	[2]
Basis spread on variable rate	1.30%		1.30%
[1]	Calculated based on one-month LIBOR plus 1.30% as of MarchB 31, 2015 and DecemberB 31, 2014
[2]	The facility fee is based on the unsecured revolving credit facility's total borrowing capacity.

Debt_Notes_Payable_Debt_Covena

Debt - Notes Payable - Debt Covenants and Restrictions (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
	eligible_property
Debt Instrument [Line Items]
Leverage ratio on credit facility	0.6
Fixed charge coverage ratio	1.5
Secured leverage ratio	0.4
Unencumbered leverage ratio	0.6
Minimum tangible net worth value	$1,500,000,000
Percentage of net proceeds from future equity issuances	85.00%
Unencumbered asset value	$400,000,000
Minimum number of eligible properties	10
Revolving credit facility
Debt Instrument [Line Items]
Secured leverage ratio	0.45

Debt_Minimum_Principal_Payment

Debt - Minimum Principal Payments Due for Notes Payable (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
Remaining 2015	$103,960
2016	134,612
2017	46,822
2018	507,612
2019	308,768
Thereafter	271,521
Total	$1,373,295

Risk_Management_and_Use_of_Fin2

Risk Management and Use of Financial Instruments - Schedule of Interest Rate Swap Derivative Instruments (Details) (LIBOR, Interest Rate Swap, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Qualifying Interest Rate Swap on Point West I Debt
Derivative [Line Items]
Notional Amount	$10,635	[1]	$10,716	[1]
Fair Value	-146	[1]	-135	[1]
Rate	1.20%	[1]	1.30%	[1]
Index	LIBOR	[1]
Maturity Date	6-Dec-16	[1]
Qualifying Interest Rate Swap on Wells Fargo Term Loan - Two
Derivative [Line Items]
Notional Amount	200,000	[2]	200,000	[2]
Fair Value	-116	[2]	1,467	[2]
Rate	0.80%	[2]	0.80%	[2]
Index	LIBOR	[2]
Maturity Date	7-Mar-18	[2]
Qualifying Interest Rate Swap on Atrium I Debt
Derivative [Line Items]
Notional Amount	21,346	[1]	21,580	[1]
Fair Value	-478	[1]	-354	[1]
Rate	1.60%	[1]	1.60%	[1]
Index	LIBOR	[1]
Maturity Date	31-May-18	[1]
Qualifying Interest Rate Swap on Wells Fargo Term Loan - Three
Derivative [Line Items]
Notional Amount	200,000		200,000
Fair Value	-3,497		-1,540
Rate	1.50%		1.50%
Index	LIBOR
Maturity Date	15-Jan-19
Qualifying Interest Rate Swap on Easton III Debt
Derivative [Line Items]
Notional Amount	6,234	[1]	6,280	[1]
Fair Value	-177	[1]	-127	[1]
Rate	1.80%	[1]	1.80%	[1]
Index	LIBOR	[1]
Maturity Date	31-Jan-19	[1]
Qualifying Interest Rate Swap on TD Term Loan
Derivative [Line Items]
Notional Amount	50,000	[2]	50,000	[2]
Fair Value	-399	[2]	266	[2]
Rate	1.40%	[2]	1.40%	[2]
Index	LIBOR	[2]
Maturity Date	6-Mar-20	[2]
Qualifying Interest Rate Swap on Capital I Debt
Derivative [Line Items]
Notional Amount	120,000		120,000
Fair Value	($7,179)		($5,543)
Rate	2.40%		2.40%
Index	LIBOR
Maturity Date	31-Jan-21
[1]	We assumed this swap in connection with the purchase of the Duke Portfolio on March 1, 2013. This swap is considered a hedging instrument under ASC 815-20 as of MarchB 31, 2015. The swap was not considered a hedging instrument under ASC 815-20 during the period from March 1, 2013 to March 31, 2013.
[2]	We entered into these swaps in connection with the origination of the TD Term Loan and WF Term Loan #1 in March 2013. These swaps are considered hedging instruments under ASC 815-20 as of MarchB 31, 2015. These swaps were not considered hedging instruments under ASC 815-20 during the period from March 11, 2013 and MarchB 12, 2013, respectively, to May 29, 2013.

Risk_Management_and_Use_of_Fin3

Risk Management and Use of Financial Instruments - Balance Sheet Location (Details) (Designated as Hedging Instrument, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$0	$1,733
Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$11,992	$7,699

Risk_Management_and_Use_of_Fin4

Risk Management and Use of Financial Instruments - Cash Flow Hedges (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivatives, Fair Value [Line Items]
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$17,000	$26,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	7,500,000
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income (OCI) (Effective Portion)	-8,188,000	-5,089,000
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	-2,145,000	-2,328,000
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$17,000	$26,000

Future_Minimum_Rents_Schedule_

Future Minimum Rents - Schedule of Minimum Future Rents to be Received on Non-cancelable Operating Leases (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Leases [Abstract]
Remaining 2015	$162,143
2016	197,435
2017	185,133
2018	168,162
2019	149,110
Thereafter	463,068
Total	$1,325,051

Related_Party_Transactions_Nar

Related Party Transactions - Narrative (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Related Party Transactions [Abstract]
Acquisition consulting fee percentage	0.75%
Sub advisory fees paid by former investment advisor	$0.20
Percentage of business, assets or voting securities to trigger agreement	10.00%
Transaction financial advisory fee due as percent of consideration in transaction	0.25%

Equity_Incentive_Plan_and_Perf2

Equity Incentive Plan and Performance Bonus Plan - Narrative (Details) (USD $)	0 Months Ended			3 Months Ended	0 Months Ended		3 Months Ended	0 Months Ended
	Mar. 15, 2014	Mar. 15, 2013	Jan. 09, 2015	Mar. 31, 2015	Feb. 26, 2014	Mar. 05, 2015	Dec. 31, 2014	Jan. 29, 2014
	employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service vesting period		3 years
Number of employees granted restricted common shares	25
Vesting description	One-third of the restricted shares granted to our named executive officers and employees will vest on each of the first three anniversaries of grant if the grantee is employed by the Company on such anniversary
Percentage of restricted shares to vest on each anniversary of grant date	33.33%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discounted grant date fair value			$7.13
Remaining term			2 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)				237,440
Grant date fair value				$6.56
Time-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)				237,422
Grant date fair value				$7.78
Martin Reid
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common shares (in shares)					90,000
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash compensation						187,000
Non-cash compensation						3,300,000
Chief Executive Officer | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)						75,000
Chief Executive Officer | Time-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)						75,000
Executive Officers and Other Senior Management | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of restricted common shares granted to employees (in shares)	401,875
Grant date fair value, per share	7.74
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of restricted common shares granted to employees (in shares)	143,450
Named Executive Officers and Our Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense				$66,000			$171,000
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares available for grant (in shares)				3,330,631
Common shares granted (in shares)								33,100
Grant date fair value, per share								$7.87
2013 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount percent			12.50%
Grant date fair value			$8.15
Aggregate number of restricted common shares granted to employees (in shares)	474,862
2013 Equity Incentive Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of restricted common shares granted to employees (in shares)	237,440
Service vesting period	3 years
Maximum number of shares of common stock issued to an employee, percent	150.00%
2013 Equity Incentive Plan | Time-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of restricted common shares granted to employees (in shares)	237,422
2013 Equity Incentive Plan | Charles Black | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)			20,000
2013 Equity Incentive Plan | Louis Salvatore
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)								5,000
2013 Equity Incentive Plan | Louis Salvatore | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)			5,000
2013 Equity Incentive Plan | James Orphanides | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)			5,000
2013 Equity Incentive Plan | James Francis
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)								1,550
2013 Equity Incentive Plan | James Francis | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)			5,000
2013 Equity Incentive Plan | Mark Brugger
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares granted (in shares)								1,550

Equity_Incentive_Plan_and_Perf3

Equity Incentive Plan and Performance Bonus Plan - Fair Value Assumptions (Details) (Performance Shares, USD $)	0 Months Ended	3 Months Ended
	Jan. 23, 2015	Mar. 31, 2015
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per unit at March 13, 2015		$6
Expected share price volatility		22.00%
Dividend yield		6.00%
Risk-free interest rate	0.00%
Remaining expected life	2 years 9 months 18 days

Equity_Incentive_Plan_and_Perf4

Equity Incentive Plan and Performance Bonus Plan - Summary of Time-Based Restricted Common Shares (Details) (USD $)	0 Months Ended	3 Months Ended
	Jan. 29, 2014	Mar. 31, 2015
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Granted Shares	33,100
Time-Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Beginning Balance Shares		800,699
Nonvested, Granted Shares		200,000	[1]
Nonvested, Vested Shares		-728,963	[1],[2]
Nonvested, Ending Balance Shares		271,736
Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Beginning Balance		$8.68
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Granted		$8.10	[1]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Vested		$8.50	[1],[2]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Ending Balance		$8.53
Time-Based Restricted Stock | 2013 Equity Incentive Plan
Weighted Average Grant Date Fair Value [Abstract]
Shares tendered to satisfy tax withholding requirements		331,485
[1]	Shares granted to Mr. Cuneo were fully vested upon his retirement.
[2]	Total shares vested include 331,485 common shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the restricted common shares that have vested. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.

Equity_Incentive_Plan_and_Perf5

Equity Incentive Plan and Performance Bonus Plan - Summary of Time-Based Restricted Share Units (Details) (Time-Based Restricted Share Units, USD $)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Beginning Balance Shares	0
Nonvested, Granted Shares	237,422
Nonvested, Vested Shares	-75,000
Nonvested, Settled Shares	0	[1]
Nonvested, Ending Balance Shares	162,422
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Beginning Balance	$0
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Granted	$7.78
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Vested	$7.78
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Settled	$0	[1]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Ending Balance	$7.78
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested, Outstanding [Roll Forward]
Beginning Balance	0
Granted	0
Vested	75,000
Settled	-75,000	[1]
Ending Balance	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Beginning Balance	0
Granted	237,422
Vested	0
Settled	-75,000	[1]
Ending Balance	162,422
2015 Equity Incentive Award
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Shares tendered to satisfy tax withholding requirements	38,806
[1]	Represents vested RSUs that were settled in shares of the Company's common shares. Total shares settled include 38,806 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the RSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.

Equity_Incentive_Plan_and_Perf6

Equity Incentive Plan and Performance Bonus Plan - Summary of Performance Share Units (Details) (Performance Shares, USD $)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Beginning Balance Shares	0
Nonvested, Granted Shares	237,440
Nonvested, Vested Shares	-75,000
Nonvested, Settled Shares	0	[1]
Nonvested, Ending Balance Shares	162,440
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Beginning Balance	$0
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Granted	$6.56
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Vested	$7.78
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Settled	$0	[1]
Nonvested, Weighted-Average Grant Date Fair Value Per Share, Ending Balance	$6
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested, Outstanding [Roll Forward]
Beginning Balance	0
Granted	0
Vested	75,000
Settled	-75,000	[1]
Ending Balance	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Beginning Balance	0
Granted	237,440
Vested	0
Settled	-75,000	[1]
Ending Balance	162,440
2015 Equity Incentive Award
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Shares tendered to satisfy tax withholding requirements	38,888
[1]	Represents vested PSUs that were settled in shares of the Company's common shares. Total shares settled include 38,888 shares that were tendered in accordance with the terms of our 2013 Equity Incentive Plan to satisfy minimum state tax withholding requirements related to the PSU settled. We accept the return of shares at the current quoted closing share price of the Company's common shares on the NYSE to satisfy tax obligations.

Equity_Incentive_Plan_and_Perf7

Equity Incentive Plan and Performance Bonus Plan - Summary of Compensation Expense and Details (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense Recorded During the Three Months Ended March 31	$4,038	[1]	$1,012	[1]
Unamortized Compensation Costs	4,269		8,263
Units available for the future awards	3,330,631	[2]	4,019,075	[2]
Severance Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense Recorded During the Three Months Ended March 31	$3,300
[1]	2015 compensation expense includes severance expense totaling $3.3 million.
[2]	Shares available for the future awards includes units under our 2013 Equity Incentive Plan.

Shareholders_Equity_Narrative_

Shareholders' Equity - Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Nov. 06, 2013
In Millions, except Share data, unless otherwise specified
Equity [Abstract]
Authorized aggregate number of shares	1,000,000,000
Common shares of beneficial interest, shares authorized	990,000,000	990,000,000
Common shares, par value	$0.01	$0.01
Preferred shares under beneficial interest	10,000,000
Par value of preferred stock	$0.01
Preferred stock issued	0	0
Preferred stock outstanding	0	0
Common stock, at the market offering, offering price			$250

Shareholders_Equity_Components

Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	($23,269)	$4,596
Other Comprehensive Income (Loss) Before Reclassifications	-26,924	-4,266
Ending balance	-48,048	2,658
Reclassified From Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amounts Reclassified from Accumulated Other Comprehensive Income to Interest Expense	2,145	2,328
Foreign Currency Translation Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	-17,513	1,670
Other Comprehensive Income (Loss) Before Reclassifications	-18,736	823
Ending balance	-36,249	2,493
Foreign Currency Translation Loss | Reclassified From Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amounts Reclassified from Accumulated Other Comprehensive Income to Interest Expense	0	0
Swap Fair Value Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	-5,756	2,926
Other Comprehensive Income (Loss) Before Reclassifications	-8,188	-5,089
Ending balance	-11,799	165
Swap Fair Value Adjustment | Reclassified From Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amounts Reclassified from Accumulated Other Comprehensive Income to Interest Expense	$2,145	$2,328

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments and Investments - Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period to reset variable rate on derivative	90 days
Impairment of real estate		$27,563
Fair value of real estate at impairment	2,083,284	2,089,190
Discount rate		12.00%
Terminal cap rate		6.50%
Expense growth rate		3.00%
70 Hudson Street
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of real estate at impairment		$94,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term revenue growth rate		3.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term revenue growth rate		3.40%

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments and Investments - Schedule of Fair Value of Assets and Liabilities Measured On Recurring Basis (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Quoted Markets Prices (Level 1) | Fair Value, Measurements, Recurring
Financial Assets (Liabilities)
Cash and Cash Equivalents	$1,574	$1,573
Interest Rate Swaps Designated as Cash Flow Hedges - Assets	0	0
Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	0	0
Investment in CBRE Strategic Partners Asia	0	0
Significant Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial Assets (Liabilities)
Cash and Cash Equivalents	0	0
Interest Rate Swaps Designated as Cash Flow Hedges - Assets	0	1,733
Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	11,992	7,699
Investment in CBRE Strategic Partners Asia	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial Assets (Liabilities)
Cash and Cash Equivalents	0	0
Interest Rate Swaps Designated as Cash Flow Hedges - Assets	0	0
Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	0	0
Investment in CBRE Strategic Partners Asia	6,684	6,870
Fair Value | Fair Value, Measurements, Recurring
Financial Assets (Liabilities)
Cash and Cash Equivalents	1,574	1,573
Interest Rate Swaps Designated as Cash Flow Hedges - Assets	0	1,733
Interest Rate Swaps Designated as Cash Flow Hedges - Liabilities	11,992	7,699
Investment in CBRE Strategic Partners Asia	6,684	6,870
Real Estate Investment | Quoted Markets Prices (Level 1) | Fair Value, Measurements, Nonrecurring
Financial Assets (Liabilities)
Fair value of real estate at impairment		0	[1]
Real Estate Investment | Significant Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Financial Assets (Liabilities)
Fair value of real estate at impairment		0	[1]
Real Estate Investment | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Financial Assets (Liabilities)
Fair value of real estate at impairment		94,000	[1]
Real Estate Investment | Fair Value | Fair Value, Measurements, Nonrecurring
Financial Assets (Liabilities)
Fair value of real estate at impairment		$94,000	[1]
[1]	Represents a non-recurring fair value measurement.

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments and Investments - Investment in CBRE Strategic Partners Asia Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment in CBRE Strategic Partners Asia
Beginning Balance, Investment in CBRE Strategic Partners Asia	$6,870	$9,676
Translation Adjustment in Other Comprehensive Income	-186
Total Income (Loss) on Fair Value Adjustment, Investment in CBRE Strategic Partners Asia		-112
Ending Balance, Investment in CBRE Strategic Partners Asia	$6,684	$9,564

Fair_Value_of_Financial_Instru5

Fair Value of Financial Instruments and Investments - Summary of Notes Payable and Estimated Fair Value (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	Mar. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Secured Notes Payable, Net	$581,706		$610,608
Unsecured Term Loan Facilities	570,000		570,000
Unsecured Revolving Credit Facility	570,000				570,000
Book Value | Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Secured Notes Payable, Net	581,706	[1]	610,608	[1]
Book Value | Unsecured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Term Loan Facilities	570,000	[1]				570,000	[1]
Unsecured Revolving Credit Facility	235,044	[1]	200,044	[1]
Fair Value | Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Secured Notes Payable, Net	603,775	[1]	628,194	[1]
Fair Value | Unsecured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Term Loan Facilities	584,654	[1]	577,196	[1]
Unsecured Revolving Credit Facility	$235,044	[1]	$200,044	[1]
[1]	Items are measured using Level 2 inputs.

Commitments_and_Contingencies_1

Commitments and Contingencies - Narrative (Details)	3 Months Ended
	Mar. 31, 2015
	renewal_option
Commitments and Contingencies Disclosure [Abstract]
Number of Lease Renewal Options	3
Lease Agreement Period	10 years

Commitments_and_Contingencies_2

Commitments and Contingencies - Maturity of Ground Lease (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]
Remaining 2015	$205
2016	273
2017	273
2018	276
2019	308
Thereafter	4,474
Total	$5,809

Segment_Disclosure_Narrative_D

Segment Disclosure - Narrative (Details)	3 Months Ended
	Mar. 31, 2015
	segment
Segment Reporting [Abstract]
Number of reportable segments	2
Number of nonreportable segments	1

Segment_Disclosure_Comparison_

Segment Disclosure - Comparison of Net Operating Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	$54,346	$51,876
Tenant Reimbursements	16,439	15,220
Other Property Income	198	1,069
Total Revenues	70,983	68,165
Property and Related Expenses:
Real Estate Taxes	10,782	9,801
Total Expenses	58,356	53,746
Income Before Other (Expenses) Income	12,627	14,419
Operating Segments
Property and Related Expenses:
Income Before Other (Expenses) Income	50,420	48,811
Operating Segments | Domestic Industrial Properties
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	18,386	14,145
Tenant Reimbursements	4,948	3,721
Other Property Income	198	0
Total Revenues	23,532	17,866
Property and Related Expenses:
Operating and Maintenance	1,872	1,491
Real Estate Taxes	3,832	3,129
Total Expenses	5,704	4,620
Income Before Other (Expenses) Income	17,828	13,246
Operating Segments | Domestic Office Properties
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	35,960	36,700
Tenant Reimbursements	11,491	11,476
Other Property Income	0	1,069
Total Revenues	47,451	49,245
Property and Related Expenses:
Operating and Maintenance	7,909	8,002
Real Estate Taxes	6,950	6,672
Total Expenses	14,859	14,674
Income Before Other (Expenses) Income	32,592	34,571
Operating Segments | Non-Reportable Properties
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	0	1,031
Tenant Reimbursements	0	23
Total Revenues	0	1,054
Property and Related Expenses:
Operating and Maintenance	0	60
Real Estate Taxes	0	0
Total Expenses	0	60
Income Before Other (Expenses) Income	$0	$994

Segment_Disclosure_Reconciliat

Segment Disclosure - Reconciliation to Consolidated Net Income (Loss) (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Reconciliation to Consolidated Net Income (Loss)
Total Segment Net Operating Income	$12,627	$14,419
EXPENSES
General and Administrative	9,873	6,864
Acquisition-Related	0	290
Depreciation and Amortization	27,920	27,238
Total Expenses	37,793	34,392
Gross Loss	12,627	14,419
OTHER EXPENSES AND INCOME
Interest and Other Income	80	167
Interest Expense	-13,059	-14,061
Interest Expense and Net Change in Fair Value of Non-Qualifying Derivative Financial Instruments	17	26
(Loss) Income Before Provision for Income Taxes and Equity in Income of Unconsolidated Entities	-335	551
Provision For Income Taxes	-176	-58
Equity in Income of Unconsolidated Entities	6,505	2,826	28,823
NET INCOME	5,994	3,319
Operating Segments
Reconciliation to Consolidated Net Income (Loss)
Total Segment Net Operating Income	$50,420	$48,811

Segment_Disclosure_Condensed_A

Segment Disclosure - Condensed Assets (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$2,827,167		$2,869,808
Operating Segments | Domestic Industrial Properties
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	915,999		916,038
Operating Segments | Domestic Office Properties
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	1,491,098		1,504,285
Corporate, Non-Segment | Non-Segment Assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$420,070	[1]	$449,485	[1]
[1]	Non-segment assets primarily include our investments in unconsolidated entities.

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net Income	$5,994	$3,319
Allocation to Participating Securities (Nonvested Restricted Shares and Vested RSUs)	-40	-127
Numerator for Basic and Diluted Net Income	$5,954	$3,192
Basic Weighted Average Shares Outstanding	236,940,134	236,583,752
Effect of Dilutive Securities - Non-Vested Time-Based RSUs	23,220	0
Diluted Weighted Average Shares Outstanding	236,963,354	236,583,752
Earnings Per Share, Basic and Diluted [Abstract]
Net Income per Share	$0.03	$0.01

Subsequent_Events_Narrative_De

Subsequent Events - Narrative (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 28, 2015	8-May-15	7-May-15
Subsequent Event [Line Items]
Distributions declared	$0.13	$0.13
Subsequent Event
Subsequent Event [Line Items]
Distributions declared			$0.04
Threshold for change in control, percent				50.00%	70.00%