10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________________________ 

FORM 10-Q

__________________________________ 

(Mark One)

x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

for the quarterly period ended March 31, 2015

OR

o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

for the transition period from ______ to ______

Commission file number 001-36113

COLUMBIA PROPERTY TRUST, INC.

(Exact name of registrant as specified in its charter)

__________________________________

Maryland	20-0068852
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

One Glenlake Parkway, Suite 1200

Atlanta, GA 30328

(Address of principal executive offices)

(Zip Code)

(404) 465-2200

(Registrant's telephone number, including area code)

(Former name, former address, and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes  x    No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

  Yes  x  No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of "large accelerated filer", "accelerated filer", and "smaller reporting company" in Rule 12b-2 of the Exchange Act (check one).

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o (Do not check if a smaller reporting company)	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  o    No  x

Number of shares outstanding of the registrant's

only class of common stock, as of April 24, 2015: 125,077,771 shares

FORM 10-Q

COLUMBIA PROPERTY TRUST, INC.

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION		Page No.
Item 1.	Condensed Consolidated Financial Statements	Page 4
	Consolidated Balance Sheets as of March 31, 2015 (unaudited) and December 31, 2014	Page 5
	Consolidated Statements of Operations for the Three Months Ended March 31, 2015 (unaudited) and 2014 (unaudited)	Page 6
	Consolidated Statements of Comprehensive Income for the Three Ended March 31, 2015 (unaudited) and 2014 (unaudited)	Page 7
	Consolidated Statements of Equity for the Three Months Ended March 31, 2015 (unaudited) and 2014 (unaudited)	Page 8
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2015 (unaudited) and 2014 (unaudited)	Page 9
	Condensed Notes to Consolidated Financial Statements (unaudited)	Page 10
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	Page 28
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	Page 33
Item 4.	Controls and Procedures	Page 34
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	Page 35
Item 1A.	Risk Factors	Page 35
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	Page 35
Item 3.	Defaults Upon Senior Securities	Page 35
Item 4.	Mine Safety Disclosures	Page 35
Item 5.	Other Information	Page 35
Item 6.	Exhibits	Page 35

Page 2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements contained in this Quarterly Report on Form 10-Q of Columbia Property Trust, Inc. ("Columbia Property Trust," "the Company," "we," "our," or "us") other than historical facts may be considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. We intend for all such forward-looking statements to be covered by the applicable safe harbor provisions for forward-looking statements contained in those acts. Such statements include, in particular, statements about our plans, strategies, and prospects and are subject to certain risks and uncertainties, including known and unknown risks, which could cause actual results to differ materially from those projected or anticipated. Therefore, such statements are not intended to be a guarantee of our performance in future periods. Such forward-looking statements can generally be identified by our use of forward-looking terminology such as "may," "will," "expect," "intend," "anticipate," "estimate," "believe," "continue," or other similar words. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date this report is filed with the U.S. Securities and Exchange Commission ("SEC"). We make no representations or warranties (express or implied) about the accuracy of any such forward-looking statements contained in this Form 10-Q, and we do not intend to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

Any such forward-looking statements are subject to risks, uncertainties, and other factors and are based on a number of assumptions involving judgments with respect to, among other things, future economic, competitive, and market conditions, all of which are difficult or impossible to predict accurately. To the extent that our assumptions differ from actual conditions, our ability to accurately anticipate results expressed in such forward-looking statements, including our ability to generate positive cash flow from operations, make distributions to stockholders, and maintain the value of our real estate properties, may be significantly hindered. See Item 1A in Columbia Property Trust's Annual Report on Form 10-K for the year ended December 31, 2014 for a discussion of some of the risks and uncertainties that could cause actual results to differ materially from those presented in our forward-looking statements. The risk factors described in our Annual Report are not the only ones we face, but do represent those risks and uncertainties that we believe are material to us. Additional risks and uncertainties not currently known to us or that we currently deem immaterial may also harm our business.

Page 3

PART I. FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The information furnished in the accompanying consolidated balance sheets, and related consolidated statements of operations, comprehensive income, equity, and cash flows, reflects all normal and recurring adjustments that are, in management's opinion, necessary for a fair and consistent presentation of the aforementioned financial statements. The accompanying consolidated financial statements should be read in conjunction with the condensed notes to Columbia Property Trust's financial statements and Management's Discussion and Analysis of Financial Condition and Results of Operations included in this Quarterly Report on Form 10-Q, and with Columbia Property Trust's Annual Report on Form 10-K filed for the year ended December 31, 2014. Columbia Property Trust's results of operations for the three months endedMarch 31, 2015 are not necessarily indicative of the operating results expected for the full year.

Page 4

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per-share amounts)

	(Unaudited)
	March 31, 2015			December 31, 2014
Assets:
Real estate assets, at cost:
Land	$	912,035		$	785,101
Buildings and improvements, less accumulated depreciation of $693,780 and $660,098, as of March 31, 2015 and December 31, 2014, respectively	3,389,402			3,026,431
Intangible lease assets, less accumulated amortization of $316,720 and $313,822, as of March 31, 2015 and December 31, 2014, respectively	291,969			247,068
Construction in progress	27,201			17,962
Total real estate assets	4,620,607			4,076,562
Cash and cash equivalents	31,236			149,790
Tenant receivables, net of allowance for doubtful accounts of $3 as of December 31, 2014	10,859			6,945
Straight-line rent receivable	121,098			116,489
Prepaid expenses and other assets	29,728			52,143
Deferred financing costs, less accumulated amortization of $15,909 and $15,205, as of March 31, 2015 and December 31, 2014, respectively	10,653			8,426
Intangible lease origination costs, less accumulated amortization of $220,596 and $219,626, as of March 31, 2015 and December 31, 2014, respectively	105,759			105,528
Deferred lease costs, less accumulated amortization of $39,338 and $36,589, as of March 31, 2015 and December 31, 2014, respectively	107,668			102,995
Investment in development authority bonds	120,000			120,000
Total assets	$	5,157,608		$	4,738,878
Liabilities:
Line of credit and notes payable	$	1,535,015		$	1,430,884
Bonds payable, net of discounts of $1,246 and $818, as of March 31, 2015 and December 31, 2014, respectively	598,754			249,182
Accounts payable, accrued expenses, and accrued capital expenditures	97,973			106,276
Deferred income	25,688			24,753
Intangible lease liabilities, less accumulated amortization of $86,922 and $84,935, as of March 31, 2015 and December 31, 2014, respectively	78,072			74,305
Obligations under capital leases	120,000			120,000
Total liabilities	2,455,502			2,005,400
Commitments and Contingencies (Note 6)	—			—
Equity:
Common stock, $0.01 par value, 225,000,000 shares authorized, 125,076,869 and 124,973,304 shares issued and outstanding as of March 31, 2015 and December 31, 2014, respectively	1,250			1,249
Additional paid-in capital	4,602,201			4,601,808
Cumulative distributions in excess of earnings	(1,899,536		)	(1,867,611		)
Cumulative other comprehensive loss	(1,809		)	(1,968		)
Total equity	2,702,106			2,733,478
Total liabilities and equity	$	5,157,608		$	4,738,878

See accompanying notes.

Page 5

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per-share amounts)

	(Unaudited)
	Three Months Ended March 31,
	2015			2014
Revenues:
Rental income	$	112,809		$	100,567
Tenant reimbursements	28,249			23,733
Hotel income	4,993			4,061
Other property income	1,492			807
	147,543			129,168
Expenses:
Property operating costs	49,754			38,980
Hotel operating costs	4,591			4,141
Asset and property management fees	397			289
Depreciation	34,007			27,304
Amortization	23,219			18,521
Impairment loss on real estate assets	—			13,550
General and administrative	8,044			6,946
Acquisition expenses	1,995			—
	122,007			109,731
Real estate operating income	25,536			19,437
Other income (expense):
Interest expense	(21,484		)	(17,910		)
Interest and other income	1,833			1,810
Loss on interest rate swaps	(6		)	(230		)
Loss on early extinguishment of debt	(477		)	—
	(20,134		)	(16,330		)
Income before income tax benefit	5,402			3,107
Income tax benefit	196			344
Income from continuing operations	5,598			3,451
Discontinued operations:
Operating income from discontinued operations	—			277
Loss on disposition of discontinued operations	—			(328		)
Loss from discontinued operations	—			(51		)
Net income	$	5,598		$	3,400
Per-share information – basic:
Income from continuing operations	$	0.04		$	0.03
Loss from discontinued operations	$	0.00		$	0.00
Net income	$	0.04		$	0.03
Weighted-average common shares outstanding – basic	124,903			124,851
Per-share information – diluted:
Income from continuing operations	$	0.04		$	0.03
Loss from discontinued operations	$	0.00		$	0.00
Net income	$	0.04		$	0.03
Weighted-average common shares outstanding – diluted	124,935			124,887
Dividends per share	$	0.300		$	0.300

See accompanying notes.

Page 6

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	(Unaudited)
	Three Months Ended March 31,
	2015		2014
Net income	$	5,598	$	3,400
Market value adjustment to interest rate swap	159		254
Comprehensive income	$	5,757	$	3,654

See accompanying notes.

Page 7

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF EQUITY

FOR THE THREE MONTHS ENDED MARCH 31, 2015 AND 2014 (UNAUDITED)

(in thousands, except per-share amounts)

	Stockholders' Equity
	Common Stock			Additional Paid-In Capital		Cumulative Distributions in Excess of Earnings			Cumulative Other Comprehensive Income (Loss)			Total Equity
	Shares	Amount
Balance, December 31, 2014	124,973	$	1,249	$	4,601,808	$	(1,867,611	)	$	(1,968	)	$	2,733,478
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	104	1		393		—			—			394
Distributions to common stockholders ($0.30 per share)	—	—		—		(37,523		)	—			(37,523		)
Net income	—	—		—		5,598			—			5,598
Market value adjustment to interest rate swap	—	—		—		—			159			159
Balance, March 31, 2015	125,077	$	1,250	$	4,602,201	$	(1,899,536	)	$	(1,809	)	$	2,702,106

	Stockholders' Equity
	Common Stock			Additional Paid-In Capital		Cumulative Distributions in Excess of Earnings			Cumulative Other Comprehensive Income (Loss)			Total  Equity
	Shares	Amount
Balance, December 31, 2013	124,830	$	1,248	$	4,600,166	$	(1,810,284	)	$	(3,307	)	$	2,787,823
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	134	1		189		—			—			190
Distributions to common stockholders ($0.30 per share)	—	—		—		(37,489		)	—			(37,489		)
Net income	—	—		—		3,400			—			3,400
Market value adjustment to interest rate swap	—	—		—		—			254			254
Balance, March 31, 2014	124,964	$	1,249	$	4,600,355	$	(1,844,373	)	$	(3,053	)	$	2,754,178

See accompanying notes.

Page 8

COLUMBIA PROPERTY TRUST, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	(Unaudited)
	Three Months Ended March 31,
	2015			2014
Cash Flows from Operating Activities:
Net income	$	5,598		$	3,400
Adjustments to reconcile net income to net cash provided by operating activities:
Straight-line rental income	(5,064		)	(2,356		)
Depreciation	34,007			27,304
Amortization	20,477			18,245
Impairment loss on real estate assets	—			13,550
Noncash interest expense	1,069			736
Loss on early extinguishment of debt	477			—
Gain on interest rate swaps	(1,315		)	(1,097		)
Loss on sale of real estate	—			328
Stock-based compensation expense	1,014			507
Changes in assets and liabilities, net of acquisitions:
Increase in tenant receivables, net	(3,935		)	(1,594		)
Decrease (increase) in prepaid expenses and other assets	(1,295		)	2,426
Decrease in accounts payable and accrued expenses	(7,436		)	(6,348		)
Increase in deferred income	935			2,690
Net cash provided by operating activities	44,532			57,791
Cash Flows from Investing Activities:
Real estate acquisitions	(551,277		)	—
Earnest money paid	—			(10,000		)
Capital improvements	(17,256		)	(12,773		)
Deferred lease costs paid	(6,804		)	(10,495		)
Net cash used in investing activities	(575,337		)	(33,268		)
Cash Flows from Financing Activities:
Financing costs paid	(3,429		)	—
Proceeds from lines of credit and notes payable	463,000			—
Repayments of lines of credit and notes payable	(358,684		)	(646		)
Proceeds from issuance of bonds payable	349,507			—
Distributions paid to stockholders	(37,523		)	(37,489		)
Shares redeemed to fund income tax withholdings on stock compensation	(620		)	—
Net cash provided by (used in) financing activities	412,251			(38,135		)
Net decrease in cash and cash equivalents	(118,554		)	(13,612		)
Cash and cash equivalents, beginning of period	149,790			99,855
Cash and cash equivalents, end of period	$	31,236		$	86,243

See accompanying notes.

Page 9

COLUMBIA PROPERTY TRUST, INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

MARCH 31, 2015

(unaudited)

1. Organization

Columbia Property Trust, Inc. ("Columbia Property Trust") (NYSE: CXP) is a Maryland corporation that operates as a real estate investment trust ("REIT") for federal income tax purposes and owns and operates commercial real estate properties. Columbia Property Trust was incorporated in 2003, commenced operations in 2004, and conducts business primarily through Columbia Property Trust Operating Partnership, L.P. ("Columbia Property Trust OP"), a Delaware limited partnership. Columbia Property Trust is the general partner and sole owner of Columbia Property Trust OP and possesses full legal control and authority over its operations. Columbia Property Trust OP acquires, develops, owns, leases, and operates real properties directly, through wholly owned subsidiaries, or through joint ventures. References to Columbia Property Trust, "we," "us," or "our" herein shall include Columbia Property Trust and all subsidiaries of Columbia Property Trust, direct and indirect, and consolidated joint ventures.

Columbia Property Trust typically invests in high-quality, income-generating office properties. As of March 31, 2015, Columbia Property Trust owned 38 office properties and one hotel, which includes 55operational buildings comprising approximately 16.6 million square feet of commercial space, located in 12 states and the District of Columbia. All of the office properties are wholly owned except for one property, which is owned through a consolidated subsidiary. As of March 31, 2015, the office properties were approximately 92.3% leased.

2. Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements of Columbia Property Trust have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by U.S. generally accepted accounting principles ("GAAP") for complete financial statements. In the opinion of management, the statements for these unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair and consistent presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year's results. Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia Property Trust OP, and any variable interest entity in which Columbia Property Trust or Columbia Property Trust OP was deemed the primary beneficiary. With respect to entities that are not variable interest entities, Columbia Property Trust's consolidated financial statements also include the accounts of any entity in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling financial interest and any limited partnership in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling general partnership interest. All intercompany balances and transactions have been eliminated in consolidation. For further information, refer to the financial statements and footnotes included in Columbia Property Trust's Annual Report on Form 10-K for the year ended December 31, 2014 (the "2014 Form 10-K").

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification ("ASC") 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Page 10

Real Estate Assets

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. Columbia Property Trust considers the period of future benefit of the asset to determine the appropriate useful lives. These assessments have a direct impact on net income. The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets, of both operating properties and properties under construction, in which Columbia Property Trust has an ownership interest, either directly or through investments in joint ventures, may not be recoverable. When indicators of potential impairment are present that suggest that the carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these assets and liabilities by determining whether the respective carrying values will be recovered through the estimated undiscounted future operating cash flows expected from the use of the assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying value of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. Estimated fair values are calculated based on the following information, in order of preference, depending upon availability: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated salvage value. Certain of Columbia Property Trust's assets may be carried at more than an amount that could be realized in a current disposition transaction. Columbia Property Trust has determined that there is no additional impairment in the carrying values of our real estate assets and related intangible assets for the three months ended March 31, 2015.

Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. The subjectivity of assumptions used in the future cash flow analysis, including discount rates, could result in an incorrect assessment of the property's fair value and could result in the misstatement of the carrying value of Columbia Property Trust's real estate assets and related intangible assets and liabilities and net income.

In the first quarter of 2014, Columbia Property Trust revised its investment strategy for the 160 Park Avenue Building in Florham Park, New Jersey, to sell the property to a user in the near term. As a result, management reduced its intended holding period for the building and reevaluated the property's carrying value as of March 31, 2014, pursuant to the accounting policy outlined above. Columbia Property Trust concluded that the 160 Park Avenue Building was not recoverable and reduced its carrying value to reflect its fair value, estimated based on recently quoted market prices (Level 2), by recording an impairment loss of approximately $13.6 million in the first quarter of 2014. The sale of the160 Park Avenue Building closed on June 4, 2014, for $10.2 million, exclusive of transaction costs.

Assets Held for Sale

Columbia Property Trust classifies assets as held for sale according to ASC 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, assets are considered held for sale when the following criteria are met:

• Management, having the authority to approve the action, commits to a plan to sell the property.

• The property is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such property.

• An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

• The sale of the property is probable, and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

• The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

Page 11

• Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

At such time that a property is determined to be held for sale, its carrying amount is reduced to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized. As of March 31, 2015, none of Columbia Property Trust's properties met the criteria to be classified as held for sale in the accompanying balance sheet.

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessor

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see Fair Value Measurements section above for additional detail). As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets						Intangible Lease Origination Costs			Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets			Absorption Period Costs
March 31, 2015	Gross	$	77,271		$	390,502		$	326,355		$	164,994
	Accumulated Amortization	(59,645		)	(241,319		)	(220,596		)	(86,922		)
	Net	$	17,626		$	149,183		$	105,759		$	78,072
December 31, 2014	Gross	$	79,805		$	370,412		$	325,154		$	159,240
	Accumulated Amortization	(61,619		)	(237,084		)	(219,626		)	(84,935		)
	Net	$	18,186		$	133,328		$	105,528		$	74,305

Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the three months ended March 31, 2015	$	1,367	$	12,362	$	8,157	$	5,411
For the three months ended March 31, 2014	$	1,356	$	8,073	$	8,432	$	3,081

The remaining net intangible assets and liabilities as of March 31, 2015, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the nine months ending December 31, 2015	$	3,573	$	34,139	$	22,371	$	14,366
For the years ending December 31:
2016	4,039		32,656		23,508		14,624
2017	1,920		19,958		15,972		9,559
2018	1,081		13,497		11,052		7,442
2019	1,035		12,041		9,944		6,738
2020	996		10,126		8,434		5,543
Thereafter	4,982		26,766		14,478		19,800
	$	17,626	$	149,183	$	105,759	$	78,072

Page 12

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessee

In-place ground leases where Columbia Property Trust is the lessee may have value associated with effective contractual rental rates that are above or below market rates at the time of execution or assumption. Such values are calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place lease and (ii) management's estimate of fair market lease rates for the corresponding in-place lease at the time of execution or assumption, measured over a period equal to the remaining terms of the leases. The capitalized above-market and below-market in-place lease values are recorded as intangible lease liabilities and assets, respectively, and are amortized as an adjustment to property operating cost over the remaining term of the respective leases. Columbia Property Trust had gross below-market lease assets of approximately $140.9 million and $110.7 million as of March 31, 2015 and December 31, 2014, respectively, and recognized amortization of these assets of approximately $0.6 million and $0.5 million for the three months ended March 31, 2015 and 2014, respectively.

As of March 31, 2015, the remaining net below-market lease assets will be amortized as follows (in thousands):

For the nine months ending December 31, 2015	$	1,912
For the years ending December 31:
2016	2,549
2017	2,549
2018	2,549
2019	2,549
2020	2,549
Thereafter	110,502
	$	125,159

Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, non-tenant receivables, prepaid taxes, insurance and operating costs, certain corporate assets, hotel inventory, and deferred tax assets. Prepaid expenses and other assets will be expensed as incurred. As of December 31, 2014, prepaid expenses and other assets included $27.0 million of earnest money deposits paid in 2014 for the January 2015 property acquisitions described in Note 3, Real Estate Transactions. These deposits were applied to the purchase prices at closing.

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate swap transactions for speculative purposes; however, certain of its derivatives may not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of the effective portion of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income, while changes in the fair value of the ineffective portion of a hedge, if any, is recognized currently in earnings. Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain (loss) on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as gain (loss) on interest rate swaps for contracts that do not qualify for hedge accounting treatment.

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The following tables provide additional information related to Columbia Property Trust's interest rate swaps (in thousands):

		Estimated Fair Value as of
Instrument Type	Balance Sheet Classification	March 31, 2015			December 31, 2014
Derivatives designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,809	)	$	(1,968	)
Derivatives not designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,318	)	$	(2,633	)

Columbia Property Trust applied the provisions of ASC 820 in recording its interest rate swaps at fair value. The fair values of the interest rate swaps, classified under Level 2, were determined using a third-party proprietary model that is based on prevailing market data for contracts with matching durations, current and anticipated London Interbank Offered Rate ("LIBOR") information, and reasonable estimates about relevant future market conditions. Columbia Property Trust has determined that the fair value, as determined by the third party, is reasonable. The fair value of Columbia Property Trust's interest rate swaps was $(3.1) million and $(4.6) million at March 31, 2015 and December 31, 2014, respectively.

	Three Months Ended March 31,
	2015			2014
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income	$	159		$	254
Loss on interest rate swap recognized through earnings	$	(6	)	$	(230	)

During the periods presented, there was no hedge ineffectiveness required to be recognized into earnings on the interest rate swaps that qualified for hedge accounting treatment.

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the "Code"), and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. As a REIT, Columbia Property Trust generally is not subject to income tax on income it distributes to stockholders. Columbia Property Trust's stockholder distributions typically exceed its taxable income due to the inclusion of noncash expenses, such as depreciation, in taxable income. As a result, Columbia Property Trust typically does not incur federal income taxes other than as described in the following paragraph. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC ("Columbia Property Trust TRS"), Columbia KCP TRS, LLC ("Columbia KCP TRS"), and Columbia Energy TRS, LLC ("Columbia Energy TRS") (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust, are organized as Delaware limited liability companies, and operate, among other things, office properties that Columbia Property Trust does not intend to hold long term and a full-service hotel. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 25% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Recent Accounting Pronouncements

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"), which establishes a comprehensive model to account for revenue arising from contracts with customers. ASU 2014-09 applies to

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all contracts with customers except those that are within the scope of other topics in the FASB's Accounting Standards Codification such as real estate leases. ASU 2014-09 will require companies to perform a five-step analysis of transactions to determine when and how revenue is recognized. ASU 2014-09 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2018, and early adoption is not permitted. Columbia Property Trust is currently in the process of evaluating the potential impact, if any, ASU 2014-09 will have on its financial statements and disclosures.

In August 2014, the FASB issued Accounting Standards Update 2014-15, Presentation of Financial Statements – Going Concern ("ASU 2014-15"), which provides guidance about the responsibility of management to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures if necessary. ASU 2014-15 will be effective prospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2014-15 to have a material impact on its financial statements and disclosures.

In February 2015, the FASB issued Accounting Standards Update 2015-02, Amendments to the Consolidation Analysis (“ASU 2015-02”), which requires the reevaluation of certain legal entities for consolidation, including limited partnerships, variable interest entities ("VIEs"), and reporting entities that are involved with VIEs. ASU 2015-02 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2015-02 to have a material impact on its financial statements and disclosures.

In April 2015, the FASB issued Accounting Standards Update 2015-03, Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”), which requires that deferred financing costs be presented on the balance sheet as a direct deduction of the carrying amount of the related debt. ASU 2015-03 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2016, and early adoption is permitted. Columbia Property Trust is currently in the process of evaluating additional potential impacts of ASU 2015-03 will have on its financial statements and disclosures.

3. Real Estate Transactions

Acquisitions

During the three months ended March 31, 2015, Columbia Property Trust acquired the following properties (in thousands):

	315 Park Avenue South Building			1881 Campus Commons Building			116 Huntington Avenue Building
Location	New York, NY			Reston, VA			Boston, MA
Date Acquired	January 7, 2015			January 7, 2015			January 8, 2015
Purchase price:
Land	$	119,746		$	7,186		$	—
Building and improvements	232,547			49,186			108,383
Intangible lease assets	16,916			4,645			7,907
Intangible below market ground lease assets	—			—			30,244
Intangible lease origination costs	4,163			1,607			2,669
Intangible below market lease liability	(7,494		)	(97		)	(1,878		)
Total purchase price	$	365,878		$	62,527		$	147,325

The purchase price for these acquisitions includes allocations based upon preliminary estimates of the fair value of the assets and liabilities acquired. These allocations may be adjusted in the future upon finalization of these preliminary estimates. Note 2, Summary of Significant Accounting Policies, providesa discussion of the estimated useful life for each asset class. Columbia Property Trust did not acquire any properties during the three months ended March 31, 2014.

Columbia Property Trust acquired these three properties in January 2015, in two separate transactions, as described below. The total purchase price of these two transactions of $588.0 million, exclusive of closing costs, was funded with a $300 million bridge loan; $140.0 million of borrowings on the JPMorgan Chase Credit Facility, as described in Note 4, Line of Credit, Term Loan, and Notes Payable; and cash on hand.

Portfolio Acquisition - 315 Park Avenue South Building & 1881 Campus Commons Building

On January 7, 2015, Columbia Property Trust acquired a portfolio of two assets, which included 315 Park Avenue South, a 341,000-square-foot office building in New York, New York (the "315 Park Avenue South Building") and 1881 Campus Commons, a

Page 15

245,000-square-foot office building in Reston, Virginia (the "1881 Campus Commons Building"). This portfolio was acquired for $436.0 million, exclusive of transaction costs and purchase price adjustments.

As of the acquisition date, the 315 Park Avenue South Building was 94.9% leased to nine tenants, including Credit Suisse (74%). For the period from January 7, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $6.2 million and a net loss of $1.3 million from the 315 Park Avenue South Building. The net loss includes acquisition expenses of $1.2 million.

As of the acquisition date, the 1881 Campus Commons Building was 78.0% leased to 15 tenants, including SOS International (15%) and Siemens (12%). For the period from January 7, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $1.5 million and a net loss of $0.6 million from the 1881 Campus Commons Building. The net loss includes acquisition expenses of $0.5 million.

116 Huntington Avenue Building

On January 8, 2015, Columbia Property Trust acquired a 274,000-square-foot office building in Boston, Massachusetts (the "116 Huntington Avenue Building"), for $152.0 million, inclusive of capital credits. As of the acquisition date, the 116 Huntington Avenue Building was 78.0% leased to 17 tenants, including American Tower (21%), GE Healthcare (13%), and Brigham and Women's (12%). For the period from January 8, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $2.9 million and a net loss of $0.2 million from the 116 Huntington Avenue Building. The net loss includes acquisition expenses of $0.3 million.

Pro Forma Financial Information

The following unaudited pro forma statements of operations presented for the three months endedMarch 31, 2015 have been prepared for Columbia Property Trust to give effect to the acquisitions of the 315 Park Avenue South Building, the 1881 Campus Commons Building, and the 116 Huntington Avenue Building as if the acquisitions occurred on January 1, 2014. The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2014 (in thousands).

	Three Months Ended March 31,
	2015		2014
Revenues	$	148,258	$	170,025
Net income (loss)	$	7,495	$	(4,563	)
Net income (loss) per share - basic	$	0.06	$	(0.04	)
Net income (loss) per share - diluted	$	0.06	$	(0.04	)

Dispositions

Columbia Property Trust did not dispose of any properties during the three months ended March 31, 2015 or 2014.

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4. Line of Credit, Term Loan, and Notes Payable

As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following line of credit, term loan, and notes payable indebtedness (excluding bonds payable; see Note 5, Bonds Payable) in thousands:

Facility	March 31, 2015		December 31, 2014
$450 Million Term Loan	$	450,000	$	450,000
Market Square Buildings mortgage note	325,000		325,000
333 Market Street Building mortgage note	206,625		206,810
650 California Street Building mortgage note	130,000		130,000
JPMorgan Chase Credit Facility	105,000		—
100 East Pratt Street Building mortgage note	105,000		105,000
221 Main Street Building mortgage note	73,000		73,000
263 Shuman Boulevard Building mortgage note	49,000		49,000
SanTan Corporate Center mortgage notes	39,000		39,000
One Glenlake Building mortgage note	31,390		32,074
215 Diehl Road Building mortgage note	21,000		21,000
Total indebtedness	$	1,535,015	$	1,430,884

Bridge Loan

On January 6, 2015, Columbia Property Trust entered into a $300.0 million, six-month, unsecured loan with a syndicate of banks led by JPMorgan Chase Bank (the "Bridge Loan") to finance a portion of the real estate assets purchased in January 2015 (see Note 3, Real Estate Transactions). The Bridge Loan was originally set to mature on July 6, 2015; however, Columbia Property Trust fully repaid the Bridge Loan on March 12, 2015, without premium or penalty, using the proceeds from the 2025 Bonds Payable, as described in Note 5, Bonds Payable. Columbia Property Trust recognized a loss on early extinguishment of debt of $0.5 million as a result of writing off the unamortized deferred financing costs relating to the Bridge Loan.

Fair Value of Debt

The estimated fair value of Columbia Property Trust's line of credit and notes payable as of March 31, 2015 and December 31, 2014, was approximately $1,569.8 million and $1,465.2 million, respectively. Columbia Property Trust estimated the fair value of its JPMorgan Chase Credit Facility (the "JPMorgan Chase Credit Facility") by obtaining estimates for similar facilities from multiple market participants as of the respective reporting dates. Therefore, the fair values determined are considered to be based on observable market data for similar instruments (Level 2). The fair values of all other debt instruments were estimated based on discounted cash flow analyses using the current incremental borrowing rates for similar types of borrowing arrangements as of the respective reporting dates. The discounted cash flow method of assessing fair value results in a general approximation of value, and such value may never actually be realized.

Interest Paid and Capitalized and Debt Covenants

During the three months ended March 31, 2015 and 2014, Columbia Property Trust made interest payments totaling approximately $15.5 million and $13.0 million, respectively, of which approximately $0.1 million was capitalized during the three months ended March 31, 2015, and no interest was capitalized during the three months ended March 31, 2014. As of March 31, 2015, Columbia Property Trust believes it was in compliance with the restrictive financial covenants on its $450 Million Term Loan (the "$450 Million Term Loan"), JPMorgan Chase Credit Facility, and notes payable obligations.

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5.    Bonds Payable

In March 2015, Columbia Property Trust OP issued $350.0 million of ten-year, unsecured 4.150% senior notes at 99.859% of their face value (the "2025 Bonds Payable"), which are guaranteed by Columbia Property Trust. Columbia Property Trust OP received proceeds from the 2025 Bonds Payable, net of fees, of $347.2 million. The 2025 Bonds Payable require semi-annual interest payments in April and October based on a contractual annual interest rate of 4.150%. In the accompanying consolidated balance sheets, the 2025 Bonds Payable are shown net of the initial issuance discount of approximately $0.5 million, which will be amortized to interest expense over the term of the 2025 Bonds Payable using the effective interest method. The principal amount of the 2025 Bonds Payable is due and payable on the maturity date, April 1, 2025.

In 2011, Columbia Property Trust OP issued $250.0 million of seven-year, unsecured 5.875% senior notes at 99.295% of their face value (the "2018 Bonds Payable"), which are guaranteed by Columbia Property Trust. Columbia Property Trust OP received proceeds from the 2018 Bonds Payable, net of fees, of $246.7 million. The 2018 Bonds Payable require semi-annual interest payments in April and October based on a contractual annual interest rate of 5.875%, which is subject to adjustment in certain circumstances. In the accompanying consolidated balance sheets, the 2018 Bonds Payable are shown net of the initial issuance discount of approximately $1.8 million, which is amortized to interest expense over the term of the 2018 Bonds Payable using the effective interest method. The principal amount of the 2018 Bonds Payable is due and payable on the maturity date, April 1, 2018.

No interest payments were made on the 2025 Bonds Payable or the 2018 Bonds Payable during the three months ended March 31, 2015 and 2014. Columbia Property Trust is subject to substantially similar covenants under the 2025 Bonds Payable and the 2018 Bonds Payable. As of March 31, 2015, Columbia Property Trust believes it was in compliance with the restrictive covenants on the 2025 Bonds Payable and the 2018 Bonds Payable.

The estimated fair value of the 2025 Bonds Payable and the 2018 Bonds Payable as of March 31, 2015 was approximately $602.6 million, and the estimated fair value of the 2018 Bonds Payable as of December 31, 2014 was $250.6 million, respectively. The fair value of the 2025 Bonds Payable and the 2018 Bonds Payable was estimated based on discounted cash flow analyses using the current incremental borrowing rates for similar types of borrowings as the 2025 Bonds Payable and the 2018 Bonds Payable arrangements as of the respective reporting dates (Level 2). The discounted cash flow method of assessing fair value results in a general approximation of value, and such value may never actually be realized.

6. Commitments and Contingencies

Commitments Under Existing Lease Agreements

Certain lease agreements include provisions that, at the option of the tenant, may obligate Columbia Property Trust to expend capital to expand an existing property or provide other expenditures for the benefit of the tenant. As of March 31, 2015, no such options have been exercised that have not been materially satisfied.

Litigation

Columbia Property Trust is subject to various legal proceedings, claims, and administrative proceedings arising in the ordinary course of business, some of which are expected to be covered by liability insurance. Management makes assumptions and estimates concerning the likelihood and amount of any reasonably possible loss relating to these matters using the latest information available. Columbia Property Trust records a liability for litigation if an unfavorable outcome is probable and the amount of loss or range of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, Columbia Property Trust accrues the best estimate within the range. If no amount within the range is a better estimate than any other amount, Columbia Property Trust accrues the minimum amount within the range. If an unfavorable outcome is probable but the amount of the loss cannot be reasonably estimated, Columbia Property Trust discloses the nature of the litigation and indicates that an estimate of the loss or range of loss cannot be made. If an unfavorable outcome is reasonably possible and the estimated loss is material, Columbia Property Trust discloses the nature and estimate of the possible loss of the litigation. Columbia Property Trust does not disclose information with respect to litigation where the possibility of an unfavorable outcome is considered to be remote. Based on current expectations, such matters, both individually and in the aggregate, are not expected to have a material adverse effect on the liquidity, results of operations, business, or financial condition of Columbia Property Trust. Columbia Property Trust is not currently involved in any legal proceedings of which management would consider the outcome to be reasonably likely to have a material adverse effect on the results of operations, liquidity, or financial condition of Columbia Property Trust.

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7. Stockholders' Equity

Long-Term Incentive Plan

Columbia Property Trust maintains a long-term incentive plan that provides for grants of stock to be made to certain employees and independent directors of Columbia Property Trust (the "Long-Term Incentive Plan").Columbia Property Trust's shareholders approved the The Long-Term Incentive Plan in July 2013, and a total of 2,000,000 shares are authorized and reserved for issuance under the Long-Term Incentive Plan.

On January 21, 2015, Columbia Property Trust granted 123,187 shares of common stock to employees, net of 11,368 shares withheld to settle the related tax liability, under the Long-Term Incentive Plan (the "2014 LTIP Employee Grant"), of which 25% vested upon grant, and the remaining shares will vest ratably, with the passage of time, on January 31, 2016, 2017, and 2018. Employees will receive quarterly dividends related to their entire grant, including the unvested shares, on each dividend payment date. A summary of the activity for the employee stock grants under the Long-Term Incentive Plan for the three months ended March 31, 2015 and 2014, follows:

	For the Three Months Ended March 31, 2015
	Shares (in thousands)		Weighted-Average Grant-Date Fair Value(1)
Unvested shares - beginning of period	104		$	24.82
Granted	123		$	24.40
Vested	(65	)	$	24.62
Forfeited	—		$	—
Unvested shares - end of period(2)	162		$	24.58

⁽¹⁾  Columbia Property Trust determined the weighted-average grant-date fair value using the market closing price on the date of the respective grants.

⁽²⁾  As of March 31, 2015, we expect approximately 154,000 of the 162,000 unvested shares to ultimately vest, assuming a forfeiture rate of 5.0%, which was determined based on peer company data, adjusted for the specifics of the Long-Term Incentive Plan.

During the three months ended March 31, 2015 and 2014, Columbia Property Trust paid quarterly installments of the independent directors' annual equity retainers by granting shares to the independent directors, which vested at the time of grant. A summary of these grants, made under the Long-Term Incentive Plan, follows:

Date of Grant	Shares	Grant-Date Fair Value
2015 Director Grants:
January 2, 2015	5,850	$	25.75
April 1, 2015	4,995	$	27.16
2014 Director Grants:
January 21, 2014	3,344	$	24.82
April 1, 2014	2,968	$	27.22

For the three months ended March 31, 2015 and 2014, Columbia Property Trust incurred $1.0 million and $0.5 million, respectively, in stock-based compensation expense, of which $0.1 million and $0.1 million, respectively, related to the issuance of shares to independent directors as described above; $0.6 million and $0.2 million, respectively, related to the amortization of unvested awards under the Long-Term Incentive Plan; and $0.3 million and $0.2 million, respectively, related to future employee awards to be granted for service during this period. These future awards have been authorized, and employee service related to these awards began on January 1, 2015. Columbia Property Trust anticipates granting these awards in January 2016, with 25% of the grant vesting on the grant date and the remaining shares vesting ratably, with the passage of time, on January 31, 2017, 2018, and 2019 (the "2015 LTIP Employee Grant"). These expenses are included in general and administrative expenses in the accompanying consolidated statement of operations. As of March 31, 2015, there was $3.2 million of unrecognized compensation costs related to unvested awards under the Long-Term Incentive Plan. This amount will be amortized over the respective vesting period, ranging from one to three years at the time of grant.

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8.     Supplemental Disclosures of Noncash Investing and Financing Activities

Outlined below are significant noncash investing and financing activities for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015			2014
Investments in real estate funded with other assets	$	27,000		$	—
Other assets assumed at acquisition	$	6,119		$	—
Other liabilities assumed at acquisition	$	2,917		$	—
Discount on issuance of bonds payable	$	494		$	—
Amortization of net (premiums) discounts on debt	$	(119	)	$	(88	)
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	159		$	254
Accrued capital expenditures and deferred lease costs	$	10,153		$	6,669
Accrued deferred financing costs	$	461		$	24
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	$	393		$	189

9. Discontinued Operations

As a result of implementing Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components on an Entity ("ASU 2014-08") effective April 1, 2014, beginning in the second quarter of 2014, the operating results for properties sold will generally be included in continuing operations. Properties sold prior to implementing ASU 2014-08 are, therefore, included in discontinued operations in the accompanying consolidated statements of operations for all periods presented.

Columbia Property Trust sold 18 properties for $521.5 million in November 2013, resulting in a net loss of $0.4 million (the "18 Property Sale"). The activity reflected in 2014 relates to post-closing adjustments and true ups related to the 18 Property Sale, and no activity has been reclassified to discontinued operations during the three months ended March 31, 2015.

	For the Three Months Ended March 31, 2014
Revenues:
Rental income	$	3
Tenant reimbursements	(51		)
	(48		)
Expenses:
Property operating costs	(347		)
Asset and property management fees	7
General and administrative	18
Total expenses	(322		)
Operating income	274
Other income (expense):
Interest and other income	3
Income from discontinued operations	277
Loss on disposition of discontinued operations	(328		)
Loss from discontinued operations	$	(51	)

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10.    Earnings Per Share

For the three months endedMarch 31, 2015 and 2014, the basic and diluted earnings per-share computations, net income, and income from continuing operations have been reduced for the dividends paid on unvested shares related to unvested awards under the Long-Term Incentive Plan and the 2015 LTIP Employee Grant. The following table reconciles the numerator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015			2014
Net income	$	5,598		$	3,400
Distributions paid on unvested shares	(49		)	(32		)
Net income used to calculate basic and diluted earnings per share	$	5,549		$	3,368

The following table reconciles the denominator for the basic and diluted earnings per-share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015	2014
Weighted-average common shares - basic	124,903	124,851
Plus incremental weighted-average shares from time-vested conversions less assumed share repurchases:
Unvested awards under the Long-Term Incentive Plan	17	23
2015 LTIP Employee Grant	15	13
Weighted-average common shares - diluted	124,935	124,887

11.     Financial Information for Parent Guarantor, Issuer Subsidiary, and Non-Guarantor Subsidiaries

The 2025 Bonds Payable and the 2018 Bonds Payable (see Note 5, Bonds Payable) were issued by Columbia Property Trust OP, and are guaranteed by Columbia Property Trust. In accordance with SEC Rule 3-10(c), Columbia Property Trust includes herein condensed consolidating financial information in lieu of separate financial statements of the subsidiary issuer (Columbia Property Trust OP), as defined in the bond indentures, because all of the following criteria are met:

(1) The subsidiary issuer (Columbia Property Trust OP) is 100% owned by the parent company guarantor (Columbia Property Trust);

(2) The guarantee is full and unconditional; and

(3) No other subsidiary of the parent company guarantor (Columbia Property Trust) guarantees the 2025 Bonds Payable or the 2018 Bonds Payable.

Columbia Property Trust uses the equity method with respect to its investment in subsidiaries included in its condensed consolidating financial statements. Set forth below are Columbia Property Trust's condensed consolidating balance sheets as of March 31, 2015, and December 31, 2014 (in thousands), as well as its condensed consolidating statements of operations and its condensed consolidating statements of comprehensive income for the three months ended March 31, 2015 and 2014 (in thousands); and its condensed consolidating statements of cash flows for the three months ended March 31, 2015 and 2014 (in thousands).

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Condensed Consolidating Balance Sheets (in thousands)

	As of March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	905,794	$	—		$	912,035
Buildings and improvements, net	—		30,132		3,359,270		—			3,389,402
Intangible lease assets, net	—		—		291,969		—			291,969
Construction in progress	—		308		26,893		—			27,201
Total real estate assets	—		36,681		4,583,926		—			4,620,607
Cash and cash equivalents	3,521		7,580		20,135		—			31,236
Investment in subsidiaries	2,521,532		2,166,615		—		(4,688,147		)	—
Tenant receivables, net of allowance	—		205		10,654		—			10,859
Straight-line rent receivable	—		1,079		120,019		—			121,098
Prepaid expenses and other assets	177,062		147,788		24,236		(319,358		)	29,728
Deferred financing costs, net	—		8,417		2,236		—			10,653
Intangible lease origination costs, net	—		—		105,759		—			105,759
Deferred lease costs, net	—		1,558		106,110		—			107,668
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608
Liabilities:
Line of credit and notes payable	$	—	$	555,000	$	1,297,829	$	(317,814	)	$	1,535,015
Bonds payable, net	—		598,754		—		—			598,754
Accounts payable, accrued expenses, and accrued capital expenditures	9		14,179		83,785		—			97,973
Due to affiliates	—		26		1,518		(1,544		)	—
Deferred income	—		341		25,347		—			25,688
Intangible lease liabilities, net	—		—		78,072		—			78,072
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	9		1,168,300		1,606,551		(319,358		)	2,455,502
Equity:
Total equity	2,702,106		1,201,623		3,486,524		(4,688,147		)	2,702,106
Total liabilities and equity	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608

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Condensed Consolidating Balance Sheets (in thousands)

	As of December 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	778,860	$	—		$	785,101
Building and improvements, net	—		29,899		2,996,532		—			3,026,431
Intangible lease assets, net	—		—		247,068		—			247,068
Construction in progress	—		433		17,529		—			17,962
Total real estate assets	—		36,573		4,039,989		—			4,076,562
Cash and cash equivalents	119,488		10,504		19,798		—			149,790
Investment in subsidiaries	2,409,941		2,120,018		—		(4,529,959		)	—
Tenant receivables, net of allowance	—		246		6,699		—			6,945
Straight-line rent receivable	—		781		115,708		—			116,489
Prepaid expenses and other assets	204,079		148,226		19,734		(319,896		)	52,143
Deferred financing costs, net	—		6,020		2,406		—			8,426
Intangible lease origination costs, net	—		—		105,528		—			105,528
Deferred lease costs, net	—		1,658		101,337		—			102,995
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878
Liabilities:
Lines of credit and notes payable	$	—	$	450,000	$	1,299,232	$	(318,348	)	$	1,430,884
Bonds payable, net	—		249,182		—		—			249,182
Accounts payable, accrued expenses, and accrued capital expenditures	30		9,749		96,497		—			106,276
Due to affiliates	—		24		1,524		(1,548		)	—
Deferred income	—		171		24,582		—			24,753
Intangible lease liabilities, net	—		—		74,305		—			74,305
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	30		709,126		1,616,140		(319,896		)	2,005,400
Equity:
Total equity	2,733,478		1,614,900		2,915,059		(4,529,959		)	2,733,478
Total liabilities and equity	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878

Page 23

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	544		$	112,359		$	(94	)	$	112,809
Tenant reimbursements	—			228			28,021			—			28,249
Hotel income	—			—			4,993			—			4,993
Other property income	—			—			1,563			(71		)	1,492
	—			772			146,936			(165		)	147,543
Expenses:
Property operating costs	—			739			49,109			(94		)	49,754
Hotel operating costs	—			—			4,591			—			4,591
Asset and property management fees:
Related-party	—			14			—			(14		)	—
Other	—			—			397			—			397
Depreciation	—			623			33,384			—			34,007
Amortization	—			56			23,163			—			23,219
General and administrative	38			1,956			6,107			(57		)	8,044
Acquisition expenses	—			—			1,995			—			1,995
	38			3,388			118,746			(165		)	122,007
Real estate operating income (loss)	(38		)	(2,616		)	28,190			—			25,536
Other income (expense):
Interest expense	—			(9,225		)	(16,899		)	4,640			(21,484		)
Interest and other income	1,991			2,657			1,825			(4,640		)	1,833
Loss on interest rate swaps	—			—			(6		)	—			(6		)
Loss on early extinguishment of debt	—			(477		)	—			—			(477		)
Income from equity investment	3,645			12,794			—			(16,439		)	—
	5,636			5,749			(15,080		)	(16,439		)	(20,134		)
Income before income tax benefit (expense)	5,598			3,133			13,110			(16,439		)	5,402
Income tax benefit (expense)	—			(5		)	201			—			196
Net income	$	5,598		$	3,128		$	13,311		$	(16,439	)	$	5,598

Page 24

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	109		$	100,547		$	(89	)	$	100,567
Tenant reimbursements	—			46			23,687			—			23,733
Hotel income	—			—			4,061			—			4,061
Other property income	—			—			844			(37		)	807
	—			155			129,139			(126		)	129,168
Expenses:
Property operating costs	—			610			38,459			(89		)	38,980
Hotel operating costs	—			—			4,141			—			4,141
Asset and property management fees:
Related-party	—			4			—			(4		)	—
Other	—			—			575			(286		)	289
Depreciation	—			381			26,923			—			27,304
Amortization	—			9			18,512			—			18,521
Impairment loss on real estate assets	—			—			13,550			—			13,550
General and administrative	29			2,617			4,333			(33		)	6,946
	29			3,621			106,493			(412		)	109,731
Real estate operating income (loss)	(29		)	(3,466		)	22,646			286			19,437
Other income (expense):
Interest expense	—			(7,434		)	(15,158		)	4,682			(17,910		)
Interest and other income	1,988			2,695			1,809			(4,682		)	1,810
Loss on interest rate swaps	—			—			(230		)	—			(230		)
Income from equity investment	1,441			8,617			—			(10,058		)	—
	3,429			3,878			(13,579		)	(10,058		)	(16,330		)
Income before income tax benefit (expense)	3,400			412			9,067			(9,772		)	3,107
Income tax benefit (expense)	—			(1		)	345			—			344
Income from continuing operations	3,400			411			9,412			(9,772		)	3,451
Discontinued operations:
Operating income from discontinued operations	—			—			277			—			277
Loss on disposition of discontinued operations	—			—			(328		)	—			(328		)
Loss from discontinued operations	—			—			(51		)	—			(51		)
Net income	$	3,400		$	411		$	9,361		$	(9,772	)	$	3,400

Page 25

Consolidating Statements of Comprehensive Income (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	5,598	$	3,128	$	13,311	$	(16,439	)	$	5,598
Market value adjustment to interest rate swap	159		159		—		(159		)	159
Comprehensive income	$	5,757	$	3,287	$	13,311	$	(16,598	)	$	5,757

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	3,400	$	411	$	9,361	$	(9,772	)	$	3,400
Market value adjustment to interest rate swap	254		254		—		(254		)	254
Comprehensive income	$	3,654	$	665	$	9,361	$	(10,026	)	$	3,654

Page 26

Consolidating Statements of Cash Flows (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(32	)	$	(10,292	)	$	54,856		$	—		$	44,532
Cash flows from investing activities:
Net proceeds from sale of real estate	—			—			—			—			—
Investment in real estate and related assets	(57,123		)	(494,850		)	(23,364		)	—			(575,337		)
Investments in subsidiaries	(553,203		)	—			—			553,203			—
Net cash used in investing activities	(610,326		)	(494,850		)	(23,364		)	553,203			(575,337		)
Cash flows from financing activities:
Borrowings, net of fees	—			809,078			—			—			809,078
Repayments of notes payable	—			(358,000		)	(684		)	—			(358,684		)
Distributions	(37,523		)	—			—			—			(37,523		)
Shares redeemed to fund income tax withholdings on stock compensation	(620		)	—			—			—			(620		)
Intercompany contributions (distributions)	532,534			51,140			(30,471		)	(553,203		)	—
Net cash provided by (used in) financing activities	494,391			502,218			(31,155		)	(553,203		)	412,251
Net decrease in cash and cash equivalents	(115,967		)	(2,924		)	337			—			(118,554		)
Cash and cash equivalents, beginning of period	119,488			10,504			19,798			—			149,790
Cash and cash equivalents, end of period	$	3,521		$	7,580		$	20,135		$	—		$	31,236

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(28	)	$	(9,614	)	$	67,433		$	—		$	57,791
Cash flows from investing activities:
Investment in real estate and related assets	—			(10,932		)	(22,336		)	—			(33,268		)
Intercompany contributions (distributions)	(13,700		)	(12,985		)	—			26,685			—
Net cash used in investing activities	(13,700		)	(23,917		)	(22,336		)	26,685			(33,268		)
Cash flows from financing activities:
Repayments of line of credit and notes payable	—			—			(646		)	—			(646		)
Distributions	(37,489		)	—			—			—			(37,489		)
Intercompany transfers, net	23,392			53,225			(49,932		)	(26,685		)	—
Net cash provided by (used in) financing activities	(14,097		)	53,225			(50,578		)	(26,685		)	(38,135		)
Net increase (decrease) in cash and cash equivalents	(27,825		)	19,694			(5,481		)	—			(13,612		)
Cash and cash equivalents, beginning of period	53,322			20,708			25,825			—			99,855
Cash and cash equivalents, end of period	$	25,497		$	40,402		$	20,344		$	—		$	86,243

Page 27

12. Subsequent Event

Columbia Property Trust has evaluated subsequent events in connection with the preparation of the consolidated financial statements and notes thereto included in this report on Form 10-Q and did not note any additional subsequent events, other than those disclosed elsewhere in this report.

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis should be read in conjunction with our accompanying consolidated financial statements (and notes thereto) and the "Cautionary Note Regarding Forward-Looking Statements" preceding Part I of this report, as well as our consolidated financial statements (and the notes thereto) and Management's Discussion and Analysis of Financial Condition and Results of Operations included in our 2014 Form 10-K.

Overview

In 2015, we are continuing to focus on enhancing our market concentration through strategic acquisitions and dispositions. Building on the momentum created in 2014 by investing $539.0 million in San Francisco and disposing of $425.5 million of non-strategic properties, we opened 2015 by acquiring three properties in January for $588.0 million, principally in New York City and Boston. We have also identified $500 million to $600 million of properties for near-term disposition that fall outside of our targeted investment strategy because they are situated in outlying markets, or are otherwise facing challenging appreciation prospects.

These capital recycling initiatives have continued to improve our concentration in key markets and central business districts, as well as reduced our exposure to single-tenant assets. Over the intermediate and longer term, we are continuing to seek to increase our allocation to central business district properties, multi-tenant buildings, and primary, high barrier markets, and also to optimize the allocation between our traditional, stabilized core investments, and growth-oriented, value-add investments. While transitioning the portfolio to more growth-oriented, value-add properties is likely to cause some dilution in earnings for a period of time, we believe that it will improve the opportunity for growth over the longer term.

Liquidity and Capital Resources

Overview

Cash flows generated from the operation of our properties are primarily used to fund recurring expenditures and stockholder dividends. Our board of directors elected to maintain the quarterly stockholder distribution rate of $0.30 per share for the first quarter of 2015. The amount of distributions to common stockholders is determined by our board of directors and is dependent upon a number of factors, including funds deemed available for distribution based principally on our current and future projected operating cash flows, reduced by capital requirements necessary to maintain our existing portfolio. In determining the amount of distributions to common stockholders, we also consider our future capital needs and future sources of liquidity, as well as the annual distribution requirements necessary to maintain our status as a REIT under the Code. Investments in new property acquisitions and first-generation capital improvements are generally funded with capital proceeds from property sales, debt, or cash on hand.

Short-term Liquidity and Capital Resources

During the three months ended March 31, 2015, we generated net cash flows from operating activities of $44.5 million, which consists primarily of receipts from tenants for rent and reimbursements, reduced by payments for operating costs, administrative expenses, and interest expense. During the same period, we paid total distributions to stockholders of $37.5 million.

During the three months ended March 31, 2015, we acquired three properties, for an aggregate purchase price of $588.0 million, exclusive of transaction costs. These acquisitions were funded with the $300.0 million of proceeds from the Bridge Loan, $140.0 million of borrowings under the JPMorgan Chase Credit Facility, and cash on hand. The Bridge Loan was fully prepaid in March 2015 with the issuance of the $350.0 million 2025 Bonds Payable. We paid down a portion of the borrowings under the JPMorgan Chase Credit Facility during the quarter, leaving $105.0 million outstanding as of March 31, 2015.

On a short-term basis, we expect our primary sources of capital to be operating cash flows and select property dispositions. We expect that our principal demands for funds will be operating expenses, distributions to stockholders, capital improvements to our existing assets, property acquisitions, and interest and principal on current, maturing debt and any future debt financings. We believe that we have adequate liquidity and capital resources to meet our current obligations as they come due. We listed our shares on the New York Stock Exchange on October 10, 2013, which we believe provides us access to additional and more efficient sources of capital. As of April 24, 2015, we had access to $398.0 million of the borrowing capacity under the JPMorgan Chase Credit Facility.

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Long-term Liquidity and Capital Resources

Over the long term, we expect that our primary sources of capital will include operating cash flows, select property dispositions, and proceeds from secured or unsecured borrowings from third-party lenders. We expect that our primary uses of capital will continue to include stockholder distributions; acquisitions; capital expenditures, such as building improvements, tenant improvements, and leasing costs; and repaying or refinancing debt.

Consistent with our financing objectives and operational strategy, we continue to maintain low debt levels, historically less than 40% of the cost of our assets. This conservative leverage goal could reduce the amount of current income we can generate for our stockholders, but it also reduces their risk of loss. We believe that preserving investor capital while generating stable current income is in the best interest of our stockholders. Our debt-to-real-estate-asset ratio is calculated using the outstanding debt balance and real estate at cost. As of March 31, 2015, our debt-to-real-estate-asset ratio was approximately 36.9%.

Universal Shelf Registration Statement

We have on file a universal shelf registration statement on Form S-3 (No. 333-198764) with the Securities and Exchange Commission (the "Universal Shelf Registration Statement"), which was effective upon filing in September 2014. The Universal Shelf Registration Statement provides us with future flexibility to offer, from time to time and in one or more offerings, debt securities, common stock, preferred stock, depositary shares, warrants, or any combination thereof. The terms of any such future offerings would be established at the time of an offering.

JPMorgan Chase Credit Facility

The JPMorgan Chase Credit Facility has a capacity of $500.0 million and matures on August 21, 2017, with a one-year extension option. As of March 31, 2015, we had an outstanding balance of $105.0 million on the JPMorgan Chase Credit Facility. Amounts outstanding under the JPMorgan Chase Credit Facility bear interest at LIBOR, plus an applicable margin ranging from 1.00% to 1.70% for LIBOR borrowings, or an applicable base rate, plus an applicable margin ranging from 0.00% to 0.70% for base rate borrowings, based on our applicable credit rating. The per annum facility fee on the aggregate revolving commitment (used or unused) ranges from 0.15% to 0.35%, also based on our applicable credit rating. Additionally, we have the ability to increase the capacity of the JPMorgan Chase Credit Facility to up to $800.0 million, subject to certain limitations.

$450 Million Term Loan

The $450 Million Term Loan matures on February 3, 2016, with two, one-year extension options available. The interest rate on the $450 Million Term Loan continues to be effectively fixed with an interest rate swap agreement. Based on the terms of the interest rate swap and our current credit rating, the interest rate on the $450 Million Term Loan is effectively fixed at 2.27%. Additionally, we have the ability to increase the borrowing capacity of the $450 Million Term Loan to up to $700.0 million, subject to certain limitations.

Bonds Payable

In March 2015, we issued $350.0 million of ten-year, unsecured 4.150% senior notes at 99.859% of their face value under our Universal Shelf Registration Statement. We received proceeds from the 2025 Bonds Payable, net of fees, of $347.2 million, a portion of which was used to repay the Bridge Loan. The 2025 Bonds Payable require semiannual interest payments in April and October based on a contractual annual interest rate of 4.150%. The principal amount of the 2025 Bonds Payable is due and payable on the maturity date, April 1, 2025.

Also, in 2011, we issued $250.0 million of seven-year, unsecured 5.875% senior notes at 99.295% of their face value. We received proceeds from the 2018 Bonds Payable, net of fees, of $246.7 million. The 2018 Bonds Payable require semiannual interest payments in April and October based on a contractual annual interest rate of 5.875%, which is subject to adjustment in certain circumstances. The principal amount of the 2018 Bonds Payable is due and payable on the maturity date, April 1, 2018.

Debt Covenants

Our portfolio debt instruments, the $450 Million Term Loan, the JPMorgan Chase Credit Facility, the 2025 Bonds Payable, and the 2018 Bonds Payable, contain certain covenants and restrictions that require us to meet certain financial ratios. We believe we were in compliance with all of our debt covenants as of March 31, 2015. Currently, we expect to continue to be able to meet the requirements of our debt covenants over the short and long term.

Page 29

Contractual Commitments and Contingencies

As of March 31, 2015, our contractual obligations will become payable in the following periods (in thousands):

Contractual Obligations	Total		2015		2016-2017		2018-2019		Thereafter
Debt obligations	$	2,134,890	$	209,827	$	853,188	$	396,875	$	675,000
Interest obligations on debt(1)	414,838		79,710		126,624		74,576		133,928
Capital lease obligations(2)	120,000		—		—		—		120,000
Operating lease obligations	215,437		1,918		5,259		5,463		202,797
Total	$	2,885,165	$	291,455	$	985,071	$	476,914	$	1,131,725

⁽¹⁾  Interest obligations on variable-rate debt are measured at the rate at which they are effectively fixed with interest rate swap agreements (where applicable), a portion of which is reflected as gain on interest rate swaps in our accompanying consolidated statements of operations. Interest obligations on all other debt are measured at the contractual rate. See Item 3, Quantitative and Qualitative Disclosure About Market Risk, for more information regarding our interest rate swaps.

⁽²⁾  Amounts include principal obligations only. We made interest payments on these obligations of $1.8 million during the three months ended March 31, 2015, all of which was funded with interest income earned on the corresponding investments in development authority bonds. These obligations will be fully satisfied at maturity with equivalent investments in development authority bonds.

Results of Operations

Overview

As of March 31, 2015, we owned controlling interests in 38 office properties, which were approximately 92.3% leased, and one hotel. During the three months ended March 31, 2015, we entered into leases for 230,000 square feet of office space with an average lease term of 9.4 years. This activity consisted of 190,000 square feet of new leasing and 40,000 square feet of renewal leasing. For leases executed during the year, we experienced a 82.7% increase in rental rates on a GAAP basis. Our real estate operating income was $25.5 million for the three months ended March 31, 2015, which represents an increase from $19.4 million for the three months ended March 31, 2014, primarily due to recent acquisitions. In the near term, we expect real estate operating income to fluctuate primarily based on acquisitions, dispositions, and leasing activities.

Comparison of the three months ended March 31, 2015 with the three months ended March 31, 2014

Continuing Operations

Rental income was $112.8 million for the three months ended March 31, 2015, which represents an increase as compared with $100.6 million for the three months ended March 31, 2014, primarily due to recent acquisitions, partially offset by properties sold during 2014. We expect rental income to fluctuate based on leasing, acquisition, and disposition activity.

Tenant reimbursements and property operating costs were $28.2 million and $49.8 million, respectively, for the three months ended March 31, 2015, which represents an increase as compared with $23.7 million and $39.0 million, respectively, for the three months ended March 31, 2014, primarily due to recent acquisitions, partially offset by properties sold during 2014. Tenant reimbursements and property operating costs are expected to fluctuate with changes in our portfolio.

Hotel income, net of hotel operating costs, was $0.4 million for the three months ended March 31, 2015, which represents an increase as compared with a loss of $0.1 million for the three months ended March 31, 2014, due to additional group bookings and meetings at the hotel. Hotel income and hotel operating costs are primarily driven by the local economic conditions and, as a result, are expected to fluctuate in the future primarily based on changes in the supply of, and demand for, hotel and banquet space in Cleveland, Ohio, similar to that offered by the Key Center Marriott hotel.

Other property income was $1.5 million for the three months ended March 31, 2015, which represents an increase as compared with $0.8 million for the three months ended March 31, 2014, primarily due to fees earned in 2015 in connection with a lease termination at the 222 East 41st Street Building. Future other property income is expected to fluctuate primarily as a result of lease restructuring and termination activities.

Asset and property management fees were $0.4 million for the three months ended March 31, 2015, which represents an increase as compared with $0.3 million for the three months ended March 31, 2014, due to recent acquisitions. Future asset and property management fees are expected to fluctuate with future acquisition and disposition activity.

Page 30

Depreciation was $34.0 million for the three months ended March 31, 2015, which represents an increase as compared with $27.3 million for the three months ended March 31, 2014, primarily due to the impact of recent acquisitions and the completion of capital improvements at existing properties, partially offset by properties sold during 2014. Excluding the impact of changes in our portfolio, depreciation is expected to increase in future periods due to ongoing capital improvements at our existing properties.

Amortization was $23.2 million for the three months ended March 31, 2015, which represents an increase as compared with $18.5 million for the three months ended March 31, 2014, respectively, primarily due to recent acquisitions, partially offset by the properties sold in 2014. We expect future amortization to fluctuate primarily as a result of future leasing activity, acquisitions, and dispositions.

During the three months ended March 31, 2014, we recognized an impairment loss of $13.6 million on the 160 Park Avenue Building in connection with revising our investment strategy to sell this property "as-is" in the first quarter of 2014; we closed on the sale in June 2014. We expect future impairment losses on real estate assets to be dependent upon the nature, timing, and extent of future disposition activities.

General and administrative expenses were $8.0 million for the three months ended March 31, 2015, which represents an increase as compared to $6.9 million for the three months ended March 31, 2014, primarily due to incurring one-time charges in connection with developing our regional investment and asset management platform. We expect that future general and administrative expenses may fluctuate somewhat over the near-term as we continue to build out our regionalized team.

We incurred total acquisition expenses of $2.0 million for the three months ended March 31, 2015 in connection with acquiring three properties in January 2015, and no acquisition expenses were incurred for the three months ended March 31, 2014. See Note 3, Real Estate Transactions, of the accompanying financial statements for additional details. We expect future acquisition expenses to fluctuate with acquisition activity.

Interest expense was $21.5 million for the three months ended March 31, 2015, which represents an increase as compared with $17.9 million for the three months ended March 31, 2014, primarily due to mortgage notes and unsecured borrowings related to recent acquisitions and refinancing activities. Interest expense is expected to fluctuate in the near term as a result of the issuance of the 2025 Bonds Payable, which will be offset as other borrowings are reduced using the proceeds of our planned near term dispositions.

Interest and other income was stable at $1.8 million for the three months ended March 31, 2015 and 2014. Interest income is expected to remain at comparable levels in future periods, as the majority of this income is earned on investments in development authority bonds with a remaining term of approximately 6.8 years as of March 31, 2015. Interest income earned on development authority bonds is entirely offset by interest expense incurred on the corresponding capital leases.

We recognized a loss on interest rate swaps that do not qualify for hedge accounting treatment of approximately $6,000 for the three months ended March 31, 2015, compared with a loss of $230,000 for the three months ended March 31, 2014. We anticipate future gains and losses on interest rate swaps that do not qualify for hedge accounting treatment will fluctuate, primarily due to changes in the estimated fair value of our interest rate swaps relative to then-current market conditions. Market value adjustments to swaps that qualify for hedge accounting treatment are recorded directly to equity, and therefore do not impact net income.

We recognized a loss on early extinguishment of debt of $0.5 million for the three months ended March 31, 2015, due to writing-off deferred financing costs in connection with repaying the Bridge Loan 4.3 months prior to its maturity date (see Note 4, Line of Credit, Term Loan, and Notes Payable, of the accompanying financial statements) with proceeds from the 2025 Bonds Payable issued in March 2015. We expect future gains or losses on early extinguishments of debt to fluctuate with financing activities.

Discontinued Operations

Loss from discontinued operations was $0.1 million for the three months ended March 31, 2014. Effective April 1, 2014, we adopted ASU 2014-08, which requires only dispositions that represent a strategic shift in our operations be reclassified to discontinued operations. Therefore, the operating results of properties disposed subsequent to our adoption date, have not been reclassified to discontinued operations. As further explained in Note 9, Discontinued Operations, to the accompanying consolidated financial statements, prior to our adoption of ASU 2014-08, properties meeting certain criteria for disposal were classified as "discontinued operations" in the accompanying consolidated statements of operations.

Net Income

Net income was $5.6 million, or $0.04 per basic and diluted share, for the three months ended March 31, 2015, which represents an increase as compared with $3.4 million, or $0.03 per basic and diluted share, for the three months ended March 31, 2014. The increase is primarily due to recent acquisitions, partially offset by the impact of related financing activity and properties sold

Page 31

during 2014. We expect future earnings to fluctuate as a result of leasing activity at our existing properties and acquisition and disposition activity.

Funds From Operations

Funds from operations ("FFO") is a non-GAAP measure used by many investors and analysts who follow the real estate industry to measure the performance of an equity REIT. We consider FFO a useful measure of our performance because it principally adjusts for the effects of GAAP depreciation and amortization of real estate assets, which assumes that the value of real estate diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, we believe that FFO provides a meaningful supplemental measure of our performance. We believe that the use of FFO, combined with the required GAAP presentations, is beneficial in improving our investors' understanding of our operating results and allowing for comparisons among other companies who define FFO as we do.

FFO, as defined by the National Association of Real Estate Investment Trusts ("NAREIT"), represents net income (computed in accordance with GAAP), excluding gains (losses) on sales of real estate and impairments of real estate assets, plus real estate-related depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures, for both continuing and discontinued operations. We compute FFO in accordance with NAREIT's definition, which may differ from the methodology for calculating FFO, or similarly titled measures, used by other companies, and this may not be comparable to those presentations.

FFO does not represent amounts available for management's discretionary use because of needed capital replacement or expansion, debt service obligations, or other commitments and uncertainties, nor is it indicative of funds available to fund our cash needs, including our ability to make distributions. Our presentation of FFO should not be considered as an alternative to net income (computed in accordance with GAAP) as an indicator of financial performance.

Reconciliations of net income to FFO (in thousands):

	Three Months Ended March 31,
	2015		2014
Reconciliation of Net Income to Funds From Operations:
Net income	$	5,598	$	3,400
Adjustments:
Depreciation of real estate assets	34,007		27,304
Amortization of lease-related costs	23,219		18,521
Impairment loss on real estate assets	—		13,550
Loss on sale of real estate assets - discontinued operations	—		328
Total Funds From Operations adjustments	57,226		59,703
Funds From Operations	$	62,824	$	63,103

Election as a REIT

We have elected to be taxed as a REIT under the Code, and have operated as such beginning with our taxable year ended December 31, 2003. To qualify as a REIT, we must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of our adjusted taxable income, as defined in the Code, to our stockholders, computed without regard to the dividends-paid deduction and by excluding our net capital gain. As a REIT, we generally will not be subject to federal income tax on income that we distribute to our stockholders. If we fail to qualify as a REIT in any taxable year, we will then be subject to federal income taxes on our taxable income for that year and for the four years following the year during which qualification is lost, unless the Internal Revenue Service grants us relief under certain statutory provisions. Such an event could materially affect our net income and net cash available for distribution to our stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT for federal income tax purposes.

Columbia Property Trust TRS, Columbia KCP TRS, and Columbia Energy TRS are wholly owned subsidiaries of Columbia Property Trust, are organized as Delaware limited liability companies, and operate, among other things, office properties that we do not intend to hold long term and a full-service hotel. We have elected to treat the TRS Entities as taxable REIT subsidiaries. We may perform certain additional, noncustomary services for tenants of our buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for us to continue to qualify as a REIT, we must limit our investments in taxable REIT subsidiaries to 25% of the value of our total assets. Deferred tax assets and liabilities

Page 32

are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted rates expected to be in effect when the temporary differences reverse.

No provisions for federal income taxes have been made in our accompanying consolidated financial statements, other than the provisions relating to Columbia Property Trust TRS, Columbia KCP TRS, and Columbia Energy TRS, as we made distributions in excess of taxable income for the periods presented. We are subject to certain state and local taxes related to property operations in certain locations, which have been provided for in our accompanying consolidated financial statements.

Inflation

We are exposed to inflation risk, as income from long-term leases is the primary source of our cash flows from operations. There are provisions in the majority of our tenant leases that are intended to protect us from, and mitigate the risk of, the impact of inflation. These provisions include rent steps, reimbursement billings for operating expense pass-through charges, real estate tax and insurance reimbursements on a per-square-foot basis, or in some cases, annual reimbursement of operating expenses above a certain per-square-foot allowance. However, due to the long-term nature of the leases, the leases may not reset frequently enough to fully cover inflation.

Application of Critical Accounting Policies

There have been no material changes in our critical accounting policies from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014.

Related-Party Transactions

During the three months ended March 31, 2015 and 2014, we did not have any related party transactions.

Commitments and Contingencies

We are subject to certain commitments and contingencies with regard to certain transactions. Refer to Note 6, Commitments and Contingencies, of our accompanying consolidated financial statements for further explanation. Examples of such commitments and contingencies include:

• obligations under operating leases;

• obligations under capital leases;

• commitments under existing lease agreements; and

• litigation.

Other Regulatory Matters

The SEC is conducting a formal, nonpublic investigation regarding Wells Investment Securities, Inc. ("WIS"), the former dealer-manager for our previous nonlisted public offerings. The investigation also relates to our company and another entity that also conducted public offerings through WIS. The investigation relates to whether there have been violations of certain provisions of the federal securities laws in connection with public offerings in which WIS served as dealer-manager, including a public offering of our shares that concluded in August 2010. In February 2013, we received a subpoena for documents and information, and we have been cooperating fully with the SEC. We are not in a position to estimate the timing of a conclusion of the investigation or whether the SEC may accuse us of any wrongdoing. To date, the costs related to our response to this subpoena have been covered by our insurance company, subject to a deductible, and we expect that any additional costs will be covered by insurance. However, we may incur uninsured losses related to our response to the subpoena in the future.

Subsequent Events

We have evaluated subsequent events in connection with the preparation of the accompanying consolidated financial statements and notes thereto included in this report on Form 10-Q and did not note any additional subsequent events, other than those disclosed elsewhere in this report.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As a result of certain of our debt facilities, we are exposed to interest rate changes. Our interest rate risk management objectives are to limit the impact of interest rate changes on earnings and cash flow, primarily through a low to moderate level of overall borrowings. However, we currently have a substantial amount of debt outstanding. We manage our ratio of fixed- to floating-rate debt with the objective of achieving a mix that we believe is appropriate in light of anticipated changes in interest rates. We closely

Page 33

monitor interest rates and will continue to consider the sources and terms of our borrowing facilities to determine whether we have appropriately guarded ourselves against the risk of increasing interest rates in future periods.

Additionally, we have entered into interest rate swaps, and may enter into other interest rate swaps, caps, or other arrangements to mitigate our interest rate risk on a related financial instrument. We do not enter into derivative or interest rate transactions for speculative purposes; however, certain of our derivatives may not qualify for hedge accounting treatment. All of our debt was entered into for other-than-trading purposes.

Our financial instruments consist of both fixed-rate and variable-rate debt. Our variable-rate borrowings consist of the JPMorgan Chase Credit Facility, the $450 Million Term Loan, and the 333 Market Street Building mortgage note. However, only the JPMorgan Chase Credit Facility bears interest at an effectively variable rate, as the variable rates on the $450 Million Term Loan and the 333 Market Street Building mortgage note have been effectively fixed through the interest rate swap agreements described in the "Liquidity and Capital Resources" section of Item 2, Management's Discussion and Analysis of Financial Condition and Results of Operations.

As of March 31, 2015, we had $105.0 million of outstanding borrowings under the JPMorgan Chase Credit Facility; $450.0 million outstanding on the $450 Million Term Loan; $206.6 million outstanding on the 333 Market Street Building mortgage note; $249.3 million in 2018 Bonds Payable outstanding; $349.5 million in 2025 Bonds Payable outstanding; and $773.4million outstanding on fixed-rate, term mortgage loans. The weighted-average interest rate of all of our debt instruments was 4.08% as of March 31, 2015.

Approximately $2,028.8 million of our total debt outstanding as of March 31, 2015 is subject to fixed rates, either directly or when coupled with an interest rate swap agreement. As of March 31, 2015, these balances incurred interest expense at an average interest rate of 4.22% and have expirations ranging from 2015 through 2025. A change in the market interest rate impacts the net financial instrument position of our fixed-rate debt portfolio; however, it has no impact on interest incurred or cash flows. The amounts outstanding on our variable-rate debt facility in the future will largely depend upon future acquisition and disposition activity.

We do not believe there is any exposure to increases in interest rates related to the capital lease obligations of $120.0 million at March 31, 2015, as the obligations are at fixed interest rates.

ITEM 4. CONTROLS AND PROCEDURES

Management's Conclusions Regarding the Effectiveness of Disclosure Controls and Procedures

We carried out an evaluation, under the supervision and with the participation of management, including the Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(e) under the Securities Exchange Act of 1934 as of the end of the period covered by this report. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this report in providing a reasonable level of assurance that information we are required to disclose in reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods in SEC rules and forms, including providing a reasonable level of assurance that information required to be disclosed by us in such reports is accumulated and communicated to our management, including our Principal Executive Officer and our Principal Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There have been no changes in our internal control over financial reporting during the quarter ended March 31, 2015, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Page 34

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we are party to legal proceedings, which arise in the ordinary course of our business. We are not currently involved in any legal proceedings of which the outcome is reasonably likely to have a material adverse effect on our results of operations, liquidity, or financial condition, nor are we aware of any such legal proceedings contemplated by governmental authorities.

ITEM 1A. RISK FACTORS

There have been no material changes from the risk factors disclosed in the "Risk Factors" section of our Annual Report on Form 10-K for the year ended December 31, 2014.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) During the quarter ended March 31, 2015, we did not sell any equity securities that were not registered under the Securities Act of 1933.

(b) Not applicable.

(c)    During the quarter ended March 31, 2015, we redeemed shares as follows (in thousands, except per-share amounts):

Period	Total Number of Shares Purchased(1)	Average  Price Paid  per Share(1)
January 2015	11,368	$	24.40
February 2015	—	$	—
March 2015	—	$	—

⁽¹⁾  All activity for January 2015 related to the remittances of shares for income taxes associated with stock grants under the Long-Term Incentive Plan (see Note 7, Stockholders' Equity).

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

(a) There have been no defaults with respect to any of our indebtedness.

(b) Not applicable.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

(a) During the first quarter of 2015, there was no information that was required to be disclosed in a report on Form 8-K that was not disclosed in a report on Form 8-K.

(b) There are no material changes to the procedures by which stockholders may recommend nominees to our board of directors since the filing of our most recent Schedule 14A.

ITEM 6. EXHIBITS

The exhibits required to be filed with this report are set forth on the Exhibit Index to this quarterly report attached hereto.

Page 35

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		COLUMBIA PROPERTY TRUST, INC. (Registrant)
Dated:	April 30, 2015	By:	/s/ JAMES A. FLEMING
			James A. Fleming Executive Vice President and Chief Financial Officer

Page 36

EXHIBIT INDEX TO

FIRST QUARTER 2015 FORM 10-Q OF

COLUMBIA PROPERTY TRUST, INC.

The following documents are filed as exhibits to this report. Exhibits that are not required for this report are omitted.

Ex.	Description
3.1	Second Amended and Restated Articles of Incorporation as Amended by the First, Second, Third and Fourth Articles of Amendment and the Articles Supplementary (incorporated by reference to Exhibit 3.1 to the Company's Quarterly Report on Form 10-Q filed with the Commission on November 5, 2013).
3.2	Second Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's current Report on Form 8-K filed with the Commission on August 15, 2013).
3.3	Third Articles of Amendment (incorporated by reference to Exhibit 3.2 to the Company's current Report on Form 8-K filed with the Commission on August 15, 2013).
3.4	Fourth Articles of Amendment (incorporated by reference to Exhibit 3.1 to the Company's current Report on Form 8-K filed with the Commission on July 1, 2014).
3.5	Articles Supplementary (incorporated by reference to Exhibit 3.1 to the Company's current Report on Form 8-K filed with the Commission on September 4, 2013).
3.6	Third Amended and Restated Bylaws (incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K filed with the Commission on September 4, 2013).
4.1	Statement regarding restrictions on transferability of shares of common stock (to appear on stock certificate or to be sent upon request and without charge to stockholders issued shares without certificates) (incorporated by reference to Exhibit 4.1 to the Company's Annual Report on Form 10-K filed with the Commission on March 1, 2013).
4.2	Indenture, dated March 12, 2015 (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed with the Commission on March 12, 2015).
4.3	Supplement Indenture, dated March 12, 2015 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed with the Commission on March 12, 2015).
4.4	Form of 4.150% Senior Notes due 2025 (included in Exhibit 4.3)
31.1*	Certification of the Principal Executive Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of the Principal Financial Officer of the Company, pursuant to Securities Exchange Act Rules 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of the Principal Executive Officer and Principal Financial Officer of the Company, pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	XBRL Instance Document.
101.SCH*	XBRL Taxonomy Extension Schema.
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase.
101.DEF*	XBRL Taxonomy Extension Definition Linkbase.
101.LAB*	XBRL Taxonomy Extension Label Linkbase.
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase.
*	Filed herewith.

Page 37

EX-31.1

EXHIBIT 31.1

PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, E. Nelson Mills, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Columbia Property Trust, Inc. for the quarter ended March 31, 2015;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:	April 30, 2015	By:	/s/ E. Nelson Mills
			E. Nelson Mills
			Principal Executive Officer

EX-31.2

EXHIBIT 31.2

PRINCIPAL FINANCIAL OFFICER

CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

I, James A. Fleming, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Columbia Property Trust, Inc. for the quarter ended March 31, 2015;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:	April 30, 2015	By:	/s/ James A. Fleming
			James A. Fleming
			Principal Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

AND PRINCIPAL FINANCIAL OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

In connection with the Quarterly Report of Columbia Property Trust, Inc. (the "Registrant") on Form 10-Q for the quarter ended March 31, 2015, as filed with the Securities and Exchange Commission (the "Report"), the undersigned, E. Nelson Mills, Principal Executive Officer of the Registrant, and James A. Fleming, Principal Financial Officer of the Registrant, hereby certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350) that, to the best of our knowledge and belief:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ E. NELSON MILLS

E. Nelson Mills

Principal Executive Officer

April 30, 2015

/s/ JAMES A. FLEMING

James A. Fleming

Principal Financial Officer

April 30, 2015

XML

Real Estate Transactions (Pro Forma) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Real Estate [Abstract]
Revenues	$ 148,258	$ 170,025
Net income (loss)	$ 7,495	$ (4,563)
Net income (loss) per share - basic (in dollars per share)	$ 0.06	$ (0.04)
Net income (loss) per share - diluted (in dollars per share)	$ 0.06	$ (0.04)

XML

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Consolidating Statements of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 44,532	$ 57,791
Cash flows from investing activities:
Net proceeds from sale of real estate	0
Investment in real estate and related assets	(575,337)	(33,268)
Intercompany contributions (distributions)		0
Investments in subsidiaries	0
Net cash used in investing activities	(575,337)	(33,268)
Cash flows from financing activities:
Borrowings, net of fees	809,078
Repayments of line of credit and notes payable	(358,684)	(646)
Distributions	(37,523)	(37,489)
Shares redeemed to fund income tax withholdings on stock compensation	(620)
Intercompany contributions (distributions)	0
Intercompany transfers, net		0
Net cash provided by (used in) financing activities	412,251	(38,135)
Net increase (decrease) in cash and cash equivalents	(118,554)	(13,612)
Cash and cash equivalents, beginning of period	149,790	99,855
Cash and cash equivalents, end of period	31,236	86,243
Reportable Legal Entities | Columbia Property Trust (Parent) (Guarantor)
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(32)	(28)
Cash flows from investing activities:
Net proceeds from sale of real estate	0
Investment in real estate and related assets	(57,123)	0
Intercompany contributions (distributions)		(13,700)
Investments in subsidiaries	(553,203)
Net cash used in investing activities	(610,326)	(13,700)
Cash flows from financing activities:
Borrowings, net of fees	0
Repayments of line of credit and notes payable	0	0
Distributions	(37,523)	(37,489)
Shares redeemed to fund income tax withholdings on stock compensation	(620)
Intercompany contributions (distributions)	532,534
Intercompany transfers, net		23,392
Net cash provided by (used in) financing activities	494,391	(14,097)
Net increase (decrease) in cash and cash equivalents	(115,967)	(27,825)
Cash and cash equivalents, beginning of period	119,488	53,322
Cash and cash equivalents, end of period	3,521	25,497
Reportable Legal Entities | Columbia Property Trust OP (the Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(10,292)	(9,614)
Cash flows from investing activities:
Net proceeds from sale of real estate	0
Investment in real estate and related assets	(494,850)	(10,932)
Intercompany contributions (distributions)		(12,985)
Investments in subsidiaries	0
Net cash used in investing activities	(494,850)	(23,917)
Cash flows from financing activities:
Borrowings, net of fees	809,078
Repayments of line of credit and notes payable	(358,000)	0
Distributions	0	0
Shares redeemed to fund income tax withholdings on stock compensation	0
Intercompany contributions (distributions)	51,140
Intercompany transfers, net		53,225
Net cash provided by (used in) financing activities	502,218	53,225
Net increase (decrease) in cash and cash equivalents	(2,924)	19,694
Cash and cash equivalents, beginning of period	10,504	20,708
Cash and cash equivalents, end of period	7,580	40,402
Reportable Legal Entities | Non- Guarantors
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	54,856	67,433
Cash flows from investing activities:
Net proceeds from sale of real estate	0
Investment in real estate and related assets	(23,364)	(22,336)
Intercompany contributions (distributions)		0
Investments in subsidiaries	0
Net cash used in investing activities	(23,364)	(22,336)
Cash flows from financing activities:
Borrowings, net of fees	0
Repayments of line of credit and notes payable	(684)	(646)
Distributions	0	0
Shares redeemed to fund income tax withholdings on stock compensation	0
Intercompany contributions (distributions)	(30,471)
Intercompany transfers, net		(49,932)
Net cash provided by (used in) financing activities	(31,155)	(50,578)
Net increase (decrease) in cash and cash equivalents	337	(5,481)
Cash and cash equivalents, beginning of period	19,798	25,825
Cash and cash equivalents, end of period	20,135	20,344
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	0	0
Cash flows from investing activities:
Net proceeds from sale of real estate	0
Investment in real estate and related assets	0	0
Intercompany contributions (distributions)		26,685
Investments in subsidiaries	553,203
Net cash used in investing activities	553,203	26,685
Cash flows from financing activities:
Borrowings, net of fees	0
Repayments of line of credit and notes payable	0	0
Distributions	0	0
Shares redeemed to fund income tax withholdings on stock compensation	0
Intercompany contributions (distributions)	(553,203)
Intercompany transfers, net		(26,685)
Net cash provided by (used in) financing activities	(553,203)	(26,685)
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ 0

XML

Discontinued Operations (Schedule of Revenue and Expenses from Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Nov. 30, 2013
Other income (expense):
Income from discontinued operations	$ 0	$ 277
Loss on disposition of discontinued operations	0	(328)
Loss from discontinued operations	0	(51)
18 Property Sale | Discontinued Operations, Disposed of by Sale
Revenues:
Rental income		3
Tenant reimbursements		(51)
Revenues		(48)
Expenses:
Property operating costs		(347)
Asset and property management fees		7
General and administrative		18
Total expenses		(322)
Operating income		274
Other income (expense):
Interest and other income		3
Income from discontinued operations		277
Loss on disposition of discontinued operations		(328)	(400)
Loss from discontinued operations		$ (51)

XML

Supplemental Disclosures of Noncash Investing and Financing Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Supplemental Cash Flow Information [Abstract]
Investments in real estate funded with other assets	$ 27,000	$ 0
Other assets assumed at acquisition	6,119	0
Other liabilities assumed at acquisition	2,917	0
Discount on issuance of bonds payable	494	0
Amortization of net (premiums) discounts on debt	(119)	(88)
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	159	254
Accrued capital expenditures and deferred lease costs	10,153	6,669
Accrued deferred financing costs	461	24
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	$ 393	$ 189

XML

Summary of Significant Accounting Policies (Schedule of Recognized Amortization) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 23,219	$ 18,521
Amortization of Below Market Lease	5,411	3,081
Above-Market In-Place Lease Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,367	1,356
Absorption Period Costs
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	12,362	8,073
Intangible lease origination costs
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 8,157	$ 8,432

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Stockholder's Equity (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Summary of the Activity of Employee Stock Grants

A summary of the activity for the employee stock grants under the Long-Term Incentive Plan for the three months ended March 31, 2015 and 2014, follows:

	For the Three Months Ended March 31, 2015
	Shares (in thousands)		Weighted-Average Grant-Date Fair Value(1)
Unvested shares - beginning of period	104		$	24.82
Granted	123		$	24.40
Vested	(65	)	$	24.62
Forfeited	—		$	—
Unvested shares - end of period(2)	162		$	24.58

⁽¹⁾  Columbia Property Trust determined the weighted-average grant-date fair value using the market closing price on the date of the respective grants.

⁽²⁾  As of March 31, 2015, we expect approximately 154,000 of the 162,000 unvested shares to ultimately vest, assuming a forfeiture rate of 5.0%, which was determined based on peer company data, adjusted for the specifics of the Long-Term Incentive Plan.

Summary of Shares Granted to Independent Directors

A summary of these grants, made under the Long-Term Incentive Plan, follows:

Date of Grant	Shares	Grant-Date Fair Value
2015 Director Grants:
January 2, 2015	5,850	$	25.75
April 1, 2015	4,995	$	27.16
2014 Director Grants:
January 21, 2014	3,344	$	24.82
April 1, 2014	2,968	$	27.22

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Narratives) (Details)	Mar. 31, 2015
Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non Guarantor Subsidiaries [Abstract]
Ownership percentage of wholly owned subsidiary	100.00%

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Bonds Payable (Narratives) (Details) (USD $)	3 Months Ended		12 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2011	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Proceeds from issuance of bonds payable	$ 349,507,000	$ 0
Initial issuance discount of bonds payable	1,246,000			1,246,000	818,000
Bonds Payable
Debt Instrument [Line Items]
Maturity of debt instrument			7 years
Bonds Payable | 2025 Bonds Payable
Debt Instrument [Line Items]
Face amount of issued debt instrument	350,000,000.0			350,000,000.0
Maturity of debt instrument				10 years
Interest rate for debt instrument (percent)	4.15%			4.15%
Discount rate of face value of issued debt instrument (in percent)	99.859%			99.859%
Proceeds from issuance of bonds payable				347,200,000
Frequency of payments				semi-annual
Initial issuance discount of bonds payable	500,000			500,000
Maturity date				Apr. 01, 2025
Interest payments	0	0
Bonds Payable | 2018 Bonds Payable
Debt Instrument [Line Items]
Face amount of issued debt instrument			250,000,000.0
Interest rate for debt instrument (percent)			5.875%
Discount rate of face value of issued debt instrument (in percent)			99.295%
Proceeds from issuance of bonds payable			246,700,000
Frequency of payments			semi-annual
Initial issuance discount of bonds payable			1,800,000
Maturity date	Apr. 01, 2018
Interest payments	0	0
Fair Value, Inputs, Level 2 | Bonds Payable | 2025 and 2018 Bonds Payable
Debt Instrument [Line Items]
Estimated fair value of debt instrument	602,600,000			602,600,000
Fair Value, Inputs, Level 2 | Bonds Payable | 2018 Bonds Payable
Debt Instrument [Line Items]
Estimated fair value of debt instrument					$ 250,600,000

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Real Estate Transactions (Schedule of Properties Acquired) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 07, 2015	Jan. 08, 2015
315 Park Avenue South Building
Business Acquisition [Line Items]
Land	$ 119,746
Buildings and Improvements	232,547
Intangible below market lease liability	(7,494)
Total Purchase Price	365,878
1881 Campus Commons Building
Business Acquisition [Line Items]
Land	7,186
Buildings and Improvements	49,186
Intangible below market lease liability	(97)
Total Purchase Price	62,527
116 Huntington Avenue Building
Business Acquisition [Line Items]
Land		0
Buildings and Improvements		108,383
Intangible below market lease liability		(1,878)
Total Purchase Price		147,325
Intangible lease assets | 315 Park Avenue South Building
Business Acquisition [Line Items]
Intangible Lease Assets	16,916
Intangible lease assets | 1881 Campus Commons Building
Business Acquisition [Line Items]
Intangible Lease Assets	4,645
Intangible lease assets | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Intangible Lease Assets		7,907
Intangible below market ground lease assets | 315 Park Avenue South Building
Business Acquisition [Line Items]
Intangible Lease Assets	0
Intangible below market ground lease assets | 1881 Campus Commons Building
Business Acquisition [Line Items]
Intangible Lease Assets	0
Intangible below market ground lease assets | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Intangible Lease Assets		30,244
Intangible lease origination costs | 315 Park Avenue South Building
Business Acquisition [Line Items]
Intangible Lease Assets	4,163
Intangible lease origination costs | 1881 Campus Commons Building
Business Acquisition [Line Items]
Intangible Lease Assets	1,607
Intangible lease origination costs | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Intangible Lease Assets		$ 2,669

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Consolidating Statements of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Rental income	$ 112,809	$ 100,567
Tenant reimbursements	28,249	23,733
Hotel income	4,993	4,061
Other property income	1,492	807
Revenues	147,543	129,168
Expenses:
Property operating costs	49,754	38,980
Hotel operating costs	4,591	4,141
Asset and property management fees - Related-party	0	0
Asset and property management fees - Other	397	289
Depreciation	34,007	27,304
Amortization	23,219	18,521
Impairment loss on real estate assets	0	13,550
General and administrative	8,044	6,946
Acquisition expenses	1,995	0
Costs and expenses	122,007	109,731
Real estate operating income	25,536	19,437
Other income (expense):
Interest expense	(21,484)	(17,910)
Interest and other income	1,833	1,810
Loss on interest rate swaps	(6)	(230)
Loss on early extinguishment of debt	(477)	0
Income from equity investment	0	0
Nonoperating income (expense)	(20,134)	(16,330)
Income before income tax benefit	5,402	3,107
Income tax expense	196	344
Income from continuing operations	5,598	3,451
Discontinued operations:
Operating income (loss) from discontinued operations	0	277
Loss on disposition of discontinued operations	0	(328)
Loss from discontinued operations	0	(51)
Net income	5,598	3,400
Reportable Legal Entities | Columbia Property Trust (Parent) (Guarantor)
Revenues:
Rental income	0	0
Tenant reimbursements	0	0
Hotel income	0	0
Other property income	0	0
Revenues	0	0
Expenses:
Property operating costs	0	0
Hotel operating costs	0	0
Asset and property management fees - Related-party	0	0
Asset and property management fees - Other	0	0
Depreciation	0	0
Amortization	0	0
Impairment loss on real estate assets		0
General and administrative	38	29
Acquisition expenses	0
Costs and expenses	38	29
Real estate operating income	(38)	(29)
Other income (expense):
Interest expense	0	0
Interest and other income	1,991	1,988
Loss on interest rate swaps	0	0
Loss on early extinguishment of debt	0
Income from equity investment	3,645	1,441
Nonoperating income (expense)	5,636	3,429
Income before income tax benefit	5,598	3,400
Income tax expense	0	0
Income from continuing operations		3,400
Discontinued operations:
Operating income (loss) from discontinued operations		0
Loss on disposition of discontinued operations		0
Loss from discontinued operations		0
Net income	5,598	3,400
Reportable Legal Entities | Columbia Property Trust OP (the Issuer)
Revenues:
Rental income	544	109
Tenant reimbursements	228	46
Hotel income	0	0
Other property income	0	0
Revenues	772	155
Expenses:
Property operating costs	739	610
Hotel operating costs	0	0
Asset and property management fees - Related-party	14	4
Asset and property management fees - Other	0	0
Depreciation	623	381
Amortization	56	9
Impairment loss on real estate assets		0
General and administrative	1,956	2,617
Acquisition expenses	0
Costs and expenses	3,388	3,621
Real estate operating income	(2,616)	(3,466)
Other income (expense):
Interest expense	(9,225)	(7,434)
Interest and other income	2,657	2,695
Loss on interest rate swaps	0	0
Loss on early extinguishment of debt	(477)
Income from equity investment	12,794	8,617
Nonoperating income (expense)	5,749	3,878
Income before income tax benefit	3,133	412
Income tax expense	(5)	(1)
Income from continuing operations		411
Discontinued operations:
Operating income (loss) from discontinued operations		0
Loss on disposition of discontinued operations		0
Loss from discontinued operations		0
Net income	3,128	411
Reportable Legal Entities | Non- Guarantors
Revenues:
Rental income	112,359	100,547
Tenant reimbursements	28,021	23,687
Hotel income	4,993	4,061
Other property income	1,563	844
Revenues	146,936	129,139
Expenses:
Property operating costs	49,109	38,459
Hotel operating costs	4,591	4,141
Asset and property management fees - Related-party	0	0
Asset and property management fees - Other	397	575
Depreciation	33,384	26,923
Amortization	23,163	18,512
Impairment loss on real estate assets		13,550
General and administrative	6,107	4,333
Acquisition expenses	1,995
Costs and expenses	118,746	106,493
Real estate operating income	28,190	22,646
Other income (expense):
Interest expense	(16,899)	(15,158)
Interest and other income	1,825	1,809
Loss on interest rate swaps	(6)	(230)
Loss on early extinguishment of debt	0
Income from equity investment	0	0
Nonoperating income (expense)	(15,080)	(13,579)
Income before income tax benefit	13,110	9,067
Income tax expense	201	345
Income from continuing operations		9,412
Discontinued operations:
Operating income (loss) from discontinued operations		277
Loss on disposition of discontinued operations		(328)
Loss from discontinued operations		(51)
Net income	13,311	9,361
Consolidating adjustments
Revenues:
Rental income	(94)	(89)
Tenant reimbursements	0	0
Hotel income	0	0
Other property income	(71)	(37)
Revenues	(165)	(126)
Expenses:
Property operating costs	(94)	(89)
Hotel operating costs	0	0
Asset and property management fees - Related-party	(14)	(4)
Asset and property management fees - Other	0	(286)
Depreciation	0	0
Amortization	0	0
Impairment loss on real estate assets		0
General and administrative	(57)	(33)
Acquisition expenses	0
Costs and expenses	(165)	(412)
Real estate operating income	0	286
Other income (expense):
Interest expense	4,640	4,682
Interest and other income	(4,640)	(4,682)
Loss on interest rate swaps	0	0
Loss on early extinguishment of debt	0
Income from equity investment	(16,439)	(10,058)
Nonoperating income (expense)	(16,439)	(10,058)
Income before income tax benefit	(16,439)	(9,772)
Income tax expense	0	0
Income from continuing operations		(9,772)
Discontinued operations:
Operating income (loss) from discontinued operations		0
Loss on disposition of discontinued operations		0
Loss from discontinued operations		0
Net income	$ (16,439)	$ (9,772)

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Discontinued Operations (Narratives) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Nov. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from the sale of real estate	$ 0
Loss on disposition of discontinued operations	0	(328)
Discontinued Operations, Disposed of by Sale | 18 Property Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from the sale of real estate			521,500
Loss on disposition of discontinued operations		$ (328)	$ (400)

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Organization

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Columbia Property Trust, Inc. ("Columbia Property Trust") (NYSE: CXP) is a Maryland corporation that operates as a real estate investment trust ("REIT") for federal income tax purposes and owns and operates commercial real estate properties. Columbia Property Trust was incorporated in 2003, commenced operations in 2004, and conducts business primarily through Columbia Property Trust Operating Partnership, L.P. ("Columbia Property Trust OP"), a Delaware limited partnership. Columbia Property Trust is the general partner and sole owner of Columbia Property Trust OP and possesses full legal control and authority over its operations. Columbia Property Trust OP acquires, develops, owns, leases, and operates real properties directly, through wholly owned subsidiaries, or through joint ventures. References to Columbia Property Trust, "we," "us," or "our" herein shall include Columbia Property Trust and all subsidiaries of Columbia Property Trust, direct and indirect, and consolidated joint ventures.

Columbia Property Trust typically invests in high-quality, income-generating office properties. As of March 31, 2015, Columbia Property Trust owned 38 office properties and one hotel, which includes 55operational buildings comprising approximately 16.6 million square feet of commercial space, located in 12 states and the District of Columbia. All of the office properties are wholly owned except for one property, which is owned through a consolidated subsidiary. As of March 31, 2015, the office properties were approximately 92.3% leased.

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Stockholder's Equity (Details) (USD $)	0 Months Ended	3 Months Ended
	Jan. 21, 2015	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 1,014,000	$ 507,000
2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share authorized		2,000,000
Shares of common stock granted to employees	123,187	123,000
Shares withheld to settle tax liability	11,368
Percent vested upon grant (percent)	25.00%
Stock-based compensation expense		1,000,000	500,000
Stock-based compensation expense related to future employee awards		300,000	200,000
Unrecognized compensation costs related to unvested awards		3,200,000
Director | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		100,000	100,000
Employees | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 600,000	$ 200,000
Grant Date | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (in percent)		25.00%
January 31, 2016 | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (in percent)		25.00%
January 31, 2017 | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (in percent)		25.00%
January 31, 2018 | 2013 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (in percent)		25.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs recognition period (years)		1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs recognition period (years)		3 years

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Tables)

3 Months Ended

Mar. 31, 2015

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non Guarantor Subsidiaries [Abstract]

Condensed Consolidating Balance Sheets

Condensed Consolidating Balance Sheets (in thousands)

	As of March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	905,794	$	—		$	912,035
Buildings and improvements, net	—		30,132		3,359,270		—			3,389,402
Intangible lease assets, net	—		—		291,969		—			291,969
Construction in progress	—		308		26,893		—			27,201
Total real estate assets	—		36,681		4,583,926		—			4,620,607
Cash and cash equivalents	3,521		7,580		20,135		—			31,236
Investment in subsidiaries	2,521,532		2,166,615		—		(4,688,147		)	—
Tenant receivables, net of allowance	—		205		10,654		—			10,859
Straight-line rent receivable	—		1,079		120,019		—			121,098
Prepaid expenses and other assets	177,062		147,788		24,236		(319,358		)	29,728
Deferred financing costs, net	—		8,417		2,236		—			10,653
Intangible lease origination costs, net	—		—		105,759		—			105,759
Deferred lease costs, net	—		1,558		106,110		—			107,668
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608
Liabilities:
Line of credit and notes payable	$	—	$	555,000	$	1,297,829	$	(317,814	)	$	1,535,015
Bonds payable, net	—		598,754		—		—			598,754
Accounts payable, accrued expenses, and accrued capital expenditures	9		14,179		83,785		—			97,973
Due to affiliates	—		26		1,518		(1,544		)	—
Deferred income	—		341		25,347		—			25,688
Intangible lease liabilities, net	—		—		78,072		—			78,072
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	9		1,168,300		1,606,551		(319,358		)	2,455,502
Equity:
Total equity	2,702,106		1,201,623		3,486,524		(4,688,147		)	2,702,106
Total liabilities and equity	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608

Condensed Consolidating Balance Sheets (in thousands)

	As of December 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	778,860	$	—		$	785,101
Building and improvements, net	—		29,899		2,996,532		—			3,026,431
Intangible lease assets, net	—		—		247,068		—			247,068
Construction in progress	—		433		17,529		—			17,962
Total real estate assets	—		36,573		4,039,989		—			4,076,562
Cash and cash equivalents	119,488		10,504		19,798		—			149,790
Investment in subsidiaries	2,409,941		2,120,018		—		(4,529,959		)	—
Tenant receivables, net of allowance	—		246		6,699		—			6,945
Straight-line rent receivable	—		781		115,708		—			116,489
Prepaid expenses and other assets	204,079		148,226		19,734		(319,896		)	52,143
Deferred financing costs, net	—		6,020		2,406		—			8,426
Intangible lease origination costs, net	—		—		105,528		—			105,528
Deferred lease costs, net	—		1,658		101,337		—			102,995
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878
Liabilities:
Lines of credit and notes payable	$	—	$	450,000	$	1,299,232	$	(318,348	)	$	1,430,884
Bonds payable, net	—		249,182		—		—			249,182
Accounts payable, accrued expenses, and accrued capital expenditures	30		9,749		96,497		—			106,276
Due to affiliates	—		24		1,524		(1,548		)	—
Deferred income	—		171		24,582		—			24,753
Intangible lease liabilities, net	—		—		74,305		—			74,305
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	30		709,126		1,616,140		(319,896		)	2,005,400
Equity:
Total equity	2,733,478		1,614,900		2,915,059		(4,529,959		)	2,733,478
Total liabilities and equity	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878

Consolidating Statements of Operations

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	544		$	112,359		$	(94	)	$	112,809
Tenant reimbursements	—			228			28,021			—			28,249
Hotel income	—			—			4,993			—			4,993
Other property income	—			—			1,563			(71		)	1,492
	—			772			146,936			(165		)	147,543
Expenses:
Property operating costs	—			739			49,109			(94		)	49,754
Hotel operating costs	—			—			4,591			—			4,591
Asset and property management fees:
Related-party	—			14			—			(14		)	—
Other	—			—			397			—			397
Depreciation	—			623			33,384			—			34,007
Amortization	—			56			23,163			—			23,219
General and administrative	38			1,956			6,107			(57		)	8,044
Acquisition expenses	—			—			1,995			—			1,995
	38			3,388			118,746			(165		)	122,007
Real estate operating income (loss)	(38		)	(2,616		)	28,190			—			25,536
Other income (expense):
Interest expense	—			(9,225		)	(16,899		)	4,640			(21,484		)
Interest and other income	1,991			2,657			1,825			(4,640		)	1,833
Loss on interest rate swaps	—			—			(6		)	—			(6		)
Loss on early extinguishment of debt	—			(477		)	—			—			(477		)
Income from equity investment	3,645			12,794			—			(16,439		)	—
	5,636			5,749			(15,080		)	(16,439		)	(20,134		)
Income before income tax benefit (expense)	5,598			3,133			13,110			(16,439		)	5,402
Income tax benefit (expense)	—			(5		)	201			—			196
Net income	$	5,598		$	3,128		$	13,311		$	(16,439	)	$	5,598

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	109		$	100,547		$	(89	)	$	100,567
Tenant reimbursements	—			46			23,687			—			23,733
Hotel income	—			—			4,061			—			4,061
Other property income	—			—			844			(37		)	807
	—			155			129,139			(126		)	129,168
Expenses:
Property operating costs	—			610			38,459			(89		)	38,980
Hotel operating costs	—			—			4,141			—			4,141
Asset and property management fees:
Related-party	—			4			—			(4		)	—
Other	—			—			575			(286		)	289
Depreciation	—			381			26,923			—			27,304
Amortization	—			9			18,512			—			18,521
Impairment loss on real estate assets	—			—			13,550			—			13,550
General and administrative	29			2,617			4,333			(33		)	6,946
	29			3,621			106,493			(412		)	109,731
Real estate operating income (loss)	(29		)	(3,466		)	22,646			286			19,437
Other income (expense):
Interest expense	—			(7,434		)	(15,158		)	4,682			(17,910		)
Interest and other income	1,988			2,695			1,809			(4,682		)	1,810
Loss on interest rate swaps	—			—			(230		)	—			(230		)
Income from equity investment	1,441			8,617			—			(10,058		)	—
	3,429			3,878			(13,579		)	(10,058		)	(16,330		)
Income before income tax benefit (expense)	3,400			412			9,067			(9,772		)	3,107
Income tax benefit (expense)	—			(1		)	345			—			344
Income from continuing operations	3,400			411			9,412			(9,772		)	3,451
Discontinued operations:
Operating income from discontinued operations	—			—			277			—			277
Loss on disposition of discontinued operations	—			—			(328		)	—			(328		)
Loss from discontinued operations	—			—			(51		)	—			(51		)
Net income	$	3,400		$	411		$	9,361		$	(9,772	)	$	3,400

Consolidating Statements of Comprehensive Income

Consolidating Statements of Comprehensive Income (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	5,598	$	3,128	$	13,311	$	(16,439	)	$	5,598
Market value adjustment to interest rate swap	159		159		—		(159		)	159
Comprehensive income	$	5,757	$	3,287	$	13,311	$	(16,598	)	$	5,757

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	3,400	$	411	$	9,361	$	(9,772	)	$	3,400
Market value adjustment to interest rate swap	254		254		—		(254		)	254
Comprehensive income	$	3,654	$	665	$	9,361	$	(10,026	)	$	3,654

Consolidating Statements of Cash Flows

Consolidating Statements of Cash Flows (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(32	)	$	(10,292	)	$	54,856		$	—		$	44,532
Cash flows from investing activities:
Net proceeds from sale of real estate	—			—			—			—			—
Investment in real estate and related assets	(57,123		)	(494,850		)	(23,364		)	—			(575,337		)
Investments in subsidiaries	(553,203		)	—			—			553,203			—
Net cash used in investing activities	(610,326		)	(494,850		)	(23,364		)	553,203			(575,337		)
Cash flows from financing activities:
Borrowings, net of fees	—			809,078			—			—			809,078
Repayments of notes payable	—			(358,000		)	(684		)	—			(358,684		)
Distributions	(37,523		)	—			—			—			(37,523		)
Shares redeemed to fund income tax withholdings on stock compensation	(620		)	—			—			—			(620		)
Intercompany contributions (distributions)	532,534			51,140			(30,471		)	(553,203		)	—
Net cash provided by (used in) financing activities	494,391			502,218			(31,155		)	(553,203		)	412,251
Net decrease in cash and cash equivalents	(115,967		)	(2,924		)	337			—			(118,554		)
Cash and cash equivalents, beginning of period	119,488			10,504			19,798			—			149,790
Cash and cash equivalents, end of period	$	3,521		$	7,580		$	20,135		$	—		$	31,236

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(28	)	$	(9,614	)	$	67,433		$	—		$	57,791
Cash flows from investing activities:
Investment in real estate and related assets	—			(10,932		)	(22,336		)	—			(33,268		)
Intercompany contributions (distributions)	(13,700		)	(12,985		)	—			26,685			—
Net cash used in investing activities	(13,700		)	(23,917		)	(22,336		)	26,685			(33,268		)
Cash flows from financing activities:
Repayments of line of credit and notes payable	—			—			(646		)	—			(646		)
Distributions	(37,489		)	—			—			—			(37,489		)
Intercompany transfers, net	23,392			53,225			(49,932		)	(26,685		)	—
Net cash provided by (used in) financing activities	(14,097		)	53,225			(50,578		)	(26,685		)	(38,135		)
Net increase (decrease) in cash and cash equivalents	(27,825		)	19,694			(5,481		)	—			(13,612		)
Cash and cash equivalents, beginning of period	53,322			20,708			25,825			—			99,855
Cash and cash equivalents, end of period	$	25,497		$	40,402		$	20,344		$	—		$	86,243

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings per Share Computations

The following table reconciles the numerator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015			2014
Net income	$	5,598		$	3,400
Distributions paid on unvested shares	(49		)	(32		)
Net income used to calculate basic and diluted earnings per share	$	5,549		$	3,368

The following table reconciles the denominator for the basic and diluted earnings per-share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015	2014
Weighted-average common shares - basic	124,903	124,851
Plus incremental weighted-average shares from time-vested conversions less assumed share repurchases:
Unvested awards under the Long-Term Incentive Plan	17	23
2015 LTIP Employee Grant	15	13
Weighted-average common shares - diluted	124,935	124,887

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Stockholder's Equity (Unvested Activity Rollforward) (Details) (2013 Long Term Incentive Plan, USD $)	0 Months Ended	3 Months Ended
	Jan. 21, 2015	Mar. 31, 2015
2013 Long Term Incentive Plan
Shares Rollforward
Unvested shares as of		104,000
Granted	123,187	123,000
Vested		(65,000)
Forfeited		0
Unvested shares as of		162,000	[1]
Weighted-Average, Grant-Date Fair Value Rollforward
Unvested shares as of		$ 24.82	[2]
Granted		$ 24.40	[2]
Vested		$ 24.62	[2]
Forfeited		$ 0.00	[2]
Unvested shares as of		$ 24.58	[2]
Shares expected to ultimately vest		154,000
Expected forfeiture rate		5.00%

[1] As of March 31, 2015, we expect approximately 154,000 of the 162,000 unvested shares to ultimately vest, assuming a forfeiture rate of 5.0%, which was determined based on peer company data, adjusted for the specifics of the Long-Term Incentive Plan.

[2] Columbia Property Trust determined the weighted-average grant-date fair value using the market closing price on the date of the respective grants.

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Organization (Details)	Mar. 31, 2015 sqft States Buildings
Real Estate
Number of operational buildings	55
Square feet of real estate	16,600,000
Number of states with properties	12
Percent of leased office space of owned properties	92.30%
Office Building
Real Estate
Number of real estate properties	38
Hotel
Real Estate
Number of real estate properties	1

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Summary of Significant Accounting Policies (Narratives) (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 04, 2014	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Impairment loss on real estate assets	$ 0	$ 13,550,000
Amortization of intangible assets	20,477,000	18,245,000
Earnest money deposits included in prepaid expenses and other assets				27,000,000
Fair value of interest rate swaps	(3,100,000)			(4,600,000)
Requirement to distribute taxable income (percent)	90.00%
Limit on investments in taxable real estate investment trusts (percent)	25.00%
Building
Significant Accounting Policies [Line Items]
Estimated useful life of real estate assets	40 years
Intangible below market lease assets
Significant Accounting Policies [Line Items]
Gross intangible assets	140,900,000			110,700,000
Amortization of intangible assets	600,000	500,000
Minimum | Building Improvements
Significant Accounting Policies [Line Items]
Estimated useful life of real estate assets	5 years
Maximum | Building Improvements
Significant Accounting Policies [Line Items]
Estimated useful life of real estate assets	25 years
160 Park Avenue
Significant Accounting Policies [Line Items]
Net proceeds from the sale of real estate			10,200,000
160 Park Avenue | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Impairment loss on real estate assets		$ 13,600,000

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Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 5,598	$ 3,400
Adjustments to reconcile net income to net cash provided by operating activities:
Straight-line rental income	(5,064)	(2,356)
Depreciation	34,007	27,304
Amortization	20,477	18,245
Impairment loss on real estate assets	0	13,550
Noncash interest expense	1,069	736
Loss on early extinguishment of debt	477	0
Gain on interest rate swaps	(1,315)	(1,097)
Loss on sale of real estate	0	328
Stock-based compensation expense	1,014	507
Changes in assets and liabilities, net of acquisitions:
Increase in tenant receivables, net	(3,935)	(1,594)
Decrease (increase) in prepaid expenses and other assets	(1,295)	2,426
Decrease in accounts payable and accrued expenses	(7,436)	(6,348)
Increase in deferred income	935	2,690
Net cash provided by operating activities	44,532	57,791
Cash Flows from Investing Activities:
Real estate acquisitions	(551,277)	0
Earnest money paid	0	(10,000)
Capital improvements	(17,256)	(12,773)
Deferred lease costs paid	(6,804)	(10,495)
Net cash used in investing activities	(575,337)	(33,268)
Cash Flows from Financing Activities:
Financing costs paid	(3,429)	0
Proceeds from lines of credit and notes payable	463,000	0
Repayments of lines of credit and notes payable	(358,684)	(646)
Proceeds from issuance of bonds payable	349,507	0
Distributions paid to stockholders	(37,523)	(37,489)
Shares redeemed to fund income tax withholdings on stock compensation	(620)	0
Net cash provided by (used in) financing activities	412,251	(38,135)
Net decrease in cash and cash equivalents	(118,554)	(13,612)
Cash and cash equivalents, beginning of period	149,790	99,855
Cash and cash equivalents, end of period	$ 31,236	$ 86,243

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Summary of Significant Accounting Policies (Schedule of Intangible Assets & Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Gross Intangible In-Place Lease Assets and Liabilities [Abstract]
Intangible Lease Assets, Accumulated Amortization	$ (316,720)	$ (313,822)
Intangible lease assets, net	291,969	247,068
Intangible Lease Origination Costs, Accumulated Amortization	(220,596)	(219,626)
Intangible Lease Origination Costs, Net	105,759	105,528
Below Market Lease, Gross	164,994	159,240
Below Market Lease, Accumulated Amortization	(86,922)	(84,935)
Below Market Lease, Net	78,072	74,305
Above-Market In-Place Lease Assets
Gross Intangible In-Place Lease Assets and Liabilities [Abstract]
Intangible Lease Assets, Gross	77,271	79,805
Intangible Lease Assets, Accumulated Amortization	(59,645)	(61,619)
Intangible lease assets, net	17,626	18,186
Absorption Period Costs
Gross Intangible In-Place Lease Assets and Liabilities [Abstract]
Intangible Lease Assets, Gross	390,502	370,412
Intangible Lease Assets, Accumulated Amortization	(241,319)	(237,084)
Intangible lease assets, net	149,183	133,328
Intangible lease origination costs
Gross Intangible In-Place Lease Assets and Liabilities [Abstract]
Intangible Lease Origination Costs, Gross	326,355	325,154
Intangible Lease Origination Costs, Accumulated Amortization	(220,596)	(219,626)
Intangible Lease Origination Costs, Net	$ 105,759	$ 105,528

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Line of Credit, Term Loan, and Notes Payable (Schedule of Long-Term Debt (excluding Bonds Payable)) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total indebtedness	$ 1,535,015	$ 1,430,884
Term Loans | $450 Million Term Loan
Debt Instrument [Line Items]
Total indebtedness	450,000	450,000
Mortgage Notes | Market Square Buildings mortgage note
Debt Instrument [Line Items]
Total indebtedness	325,000	325,000
Mortgage Notes | 333 Market Street Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	206,625	206,810
Mortgage Notes | 650 California Street Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	130,000	130,000
Mortgage Notes | 100 East Pratt Street Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	105,000	105,000
Mortgage Notes | 221 Main Street Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	73,000	73,000
Mortgage Notes | 263 Shuman Boulevard Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	49,000	49,000
Mortgage Notes | SanTan Corporate Center mortgage notes
Debt Instrument [Line Items]
Total indebtedness	39,000	39,000
Mortgage Notes | One Glenlake Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	31,390	32,074
Mortgage Notes | 215 Diehl Road Building mortgage note
Debt Instrument [Line Items]
Total indebtedness	21,000	21,000
Credit Facilities | JPMorgan Chase Credit Facility
Debt Instrument [Line Items]
Total indebtedness	$ 105,000	$ 0

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Consolidating Statements of Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net income	$ 5,598	$ 3,400
Market value adjustment to interest rate swap	159	254
Comprehensive income (loss)	5,757	3,654
Reportable Legal Entities | Columbia Property Trust (Parent) (Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net income	5,598	3,400
Market value adjustment to interest rate swap	159	254
Comprehensive income (loss)	5,757	3,654
Reportable Legal Entities | Columbia Property Trust OP (the Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	3,128	411
Market value adjustment to interest rate swap	159	254
Comprehensive income (loss)	3,287	665
Reportable Legal Entities | Non- Guarantors
Condensed Financial Statements, Captions [Line Items]
Net income	13,311	9,361
Market value adjustment to interest rate swap	0	0
Comprehensive income (loss)	13,311	9,361
Consolidating adjustments
Condensed Financial Statements, Captions [Line Items]
Net income	(16,439)	(9,772)
Market value adjustment to interest rate swap	(159)	(254)
Comprehensive income (loss)	$ (16,598)	$ (10,026)

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Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets:
Land	$ 912,035	$ 785,101
Buildings and improvements, less accumulated depreciation of $693,780 and $660,098, as of March 31, 2015 and December 31, 2014, respectively	3,389,402	3,026,431
Intangible lease assets, less accumulated amortization of $316,720 and $313,822, as of March 31, 2015 and December 31, 2014, respectively	291,969	247,068
Construction in progress	27,201	17,962
Total real estate assets	4,620,607	4,076,562
Cash and cash equivalents	31,236	149,790
Tenant receivables, net of allowance for doubtful accounts of $3 as of December 31, 2014	10,859	6,945
Straight-line rent receivable	121,098	116,489
Prepaid expenses and other assets	29,728	52,143
Deferred financing costs, less accumulated amortization of $15,909 and $15,205, as of March 31, 2015 and December 31, 2014, respectively	10,653	8,426
Intangible lease origination costs, less accumulated amortization of $220,596 and $219,626, as of March 31, 2015 and December 31, 2014, respectively	105,759	105,528
Deferred lease costs, less accumulated amortization of $39,338 and $36,589, as of March 31, 2015 and December 31, 2014, respectively	107,668	102,995
Investment in development authority bonds	120,000	120,000
Total assets	5,157,608	4,738,878
Liabilities:
Line of credit and notes payable	1,535,015	1,430,884
Bonds payable, net of discounts of $1,246 and $818, as of March 31, 2015 and December 31, 2014, respectively	598,754	249,182
Accounts payable, accrued expenses, and accrued capital expenditures	97,973	106,276
Deferred income	25,688	24,753
Intangible lease liabilities, less accumulated amortization of $86,922 and $84,935, as of March 31, 2015 and December 31, 2014, respectively	78,072	74,305
Obligations under capital leases	120,000	120,000
Total liabilities	2,455,502	2,005,400
Commitments and Contingencies (Note 6)
Equity:
Common stock, $0.01 par value, 225,000,000 shares authorized, 125,076,869 and 124,973,304 shares issued and outstanding as of March 31, 2015 and December 31, 2014, respectively	1,250	1,249
Additional paid-in capital	4,602,201	4,601,808
Cumulative distributions in excess of earnings	(1,899,536)	(1,867,611)
Cumulative other comprehensive loss	(1,809)	(1,968)
Total equity	2,702,106	2,733,478
Total liabilities and equity	$ 5,157,608	$ 4,738,878

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Stockholder's Equity (Summary of Shares Granted to Independent Directors) (Details) (2013 Long Term Incentive Plan, USD $)	0 Months Ended	3 Months Ended		0 Months Ended
	Jan. 21, 2015	Mar. 31, 2015		Jan. 02, 2015	Jan. 21, 2014	Apr. 01, 2014	Apr. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted to employees	123,187	123,000
Weighted average grant date fair value of shares granted		$ 24.40	[1]
Director | January 02, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted to employees				5,850
Weighted average grant date fair value of shares granted				$ 25.75
Director | January 21, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted to employees					3,344
Weighted average grant date fair value of shares granted					$ 24.82
Director | April 1, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted to employees						2,968
Weighted average grant date fair value of shares granted						$ 27.22
Subsequent Event | Director | April 1, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted to employees							4,995
Weighted average grant date fair value of shares granted							$ 27.16

[1] Columbia Property Trust determined the weighted-average grant-date fair value using the market closing price on the date of the respective grants.

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Consolidated Statements of Equity (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Cumulative Distributions in Excess of Earnings	Cumulative Other Comprehensive Income (Loss)
Balance, value at beginning of period at Dec. 31, 2013	$ 2,787,823	$ 1,248	$ 4,600,166	$ (1,810,284)	$ (3,307)
Balance, shares at beginning of period at Dec. 31, 2013		124,830,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes), shares		134,000
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	190	1	189
Distributions to common stockholders	(37,489)			(37,489)
Net income	3,400			3,400
Market value adjustment to interest rate swap	254				254
Balance, value at end of period at Mar. 31, 2014	2,754,178	1,249	4,600,355	(1,844,373)	(3,053)
Balance, shares at end of period at Mar. 31, 2014		124,964,000
Balance, value at beginning of period at Dec. 31, 2014	2,733,478	1,249	4,601,808	(1,867,611)	(1,968)
Balance, shares at beginning of period at Dec. 31, 2014	124,973,304	124,973,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes), shares		104,000
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	394	1	393
Distributions to common stockholders	(37,523)			(37,523)
Net income	5,598			5,598
Market value adjustment to interest rate swap	159				159
Balance, value at end of period at Mar. 31, 2015	$ 2,702,106	$ 1,250	$ 4,602,201	$ (1,899,536)	$ (1,809)
Balance, shares at end of period at Mar. 31, 2015	125,076,869	125,077,000

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Summary of Significant Accounting Policies (Schedule of Future Amortization for Below-Market Lease Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
For the years ending December 31:
Intangible lease assets, net	$ 291,969	$ 247,068
Intangible below market lease assets
Finite-Lived Intangible Assets [Line Items]
For the nine months ending December 31, 2015	1,912
For the years ending December 31:
2016	2,549
2017	2,549
2018	2,549
2019	2,549
2020	2,549
Thereafter	110,502
Intangible lease assets, net	$ 125,159

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives for Real Estate Assets

The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Schedule of Intangible Assets and Liabilities

As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets						Intangible Lease Origination Costs			Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets			Absorption Period Costs
March 31, 2015	Gross	$	77,271		$	390,502		$	326,355		$	164,994
	Accumulated Amortization	(59,645		)	(241,319		)	(220,596		)	(86,922		)
	Net	$	17,626		$	149,183		$	105,759		$	78,072
December 31, 2014	Gross	$	79,805		$	370,412		$	325,154		$	159,240
	Accumulated Amortization	(61,619		)	(237,084		)	(219,626		)	(84,935		)
	Net	$	18,186		$	133,328		$	105,528		$	74,305

Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the three months ended March 31, 2015	$	1,367	$	12,362	$	8,157	$	5,411
For the three months ended March 31, 2014	$	1,356	$	8,073	$	8,432	$	3,081

The remaining net intangible assets and liabilities as of March 31, 2015, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the nine months ending December 31, 2015	$	3,573	$	34,139	$	22,371	$	14,366
For the years ending December 31:
2016	4,039		32,656		23,508		14,624
2017	1,920		19,958		15,972		9,559
2018	1,081		13,497		11,052		7,442
2019	1,035		12,041		9,944		6,738
2020	996		10,126		8,434		5,543
Thereafter	4,982		26,766		14,478		19,800
	$	17,626	$	149,183	$	105,759	$	78,072

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of March 31, 2015, the remaining net below-market lease assets will be amortized as follows (in thousands):

For the nine months ending December 31, 2015	$	1,912
For the years ending December 31:
2016	2,549
2017	2,549
2018	2,549
2019	2,549
2020	2,549
Thereafter	110,502
	$	125,159

Schedule of Interest Rate Derivatives

The following tables provide additional information related to Columbia Property Trust's interest rate swaps (in thousands):

		Estimated Fair Value as of
Instrument Type	Balance Sheet Classification	March 31, 2015			December 31, 2014
Derivatives designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,809	)	$	(1,968	)
Derivatives not designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,318	)	$	(2,633	)

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position

Columbia Property Trust applied the provisions of ASC 820 in recording its interest rate swaps at fair value. The fair values of the interest rate swaps, classified under Level 2, were determined using a third-party proprietary model that is based on prevailing market data for contracts with matching durations, current and anticipated London Interbank Offered Rate ("LIBOR") information, and reasonable estimates about relevant future market conditions. Columbia Property Trust has determined that the fair value, as determined by the third party, is reasonable. The fair value of Columbia Property Trust's interest rate swaps was $(3.1) million and $(4.6) million at March 31, 2015 and December 31, 2014, respectively.

	Three Months Ended March 31,
	2015			2014
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income	$	159		$	254
Loss on interest rate swap recognized through earnings	$	(6	)	$	(230	)

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Summary of Significant Accounting Policies (Interest Rate Swaps) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Market value adjustment to interest rate swap designated as a hedge instrument included in other comprehensive income	$ 159	$ 254
Loss on interest rate swap recognized through earnings	(6)	(230)
Interest Rate Contract | Accounts Payable
Derivative, Fair Value, Net [Abstract]
Derivative designated as hedging instruments	(1,809)		(1,968)
Derivatives not designated as hedging instruments	$ (1,318)		$ (2,633)

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Line of Credit, Term Loan, and Notes Payable (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Schedule of line of credit and notes payable indebtedness outstanding

As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following line of credit, term loan, and notes payable indebtedness (excluding bonds payable; see Note 5, Bonds Payable) in thousands:

Facility	March 31, 2015		December 31, 2014
$450 Million Term Loan	$	450,000	$	450,000
Market Square Buildings mortgage note	325,000		325,000
333 Market Street Building mortgage note	206,625		206,810
650 California Street Building mortgage note	130,000		130,000
JPMorgan Chase Credit Facility	105,000		—
100 East Pratt Street Building mortgage note	105,000		105,000
221 Main Street Building mortgage note	73,000		73,000
263 Shuman Boulevard Building mortgage note	49,000		49,000
SanTan Corporate Center mortgage notes	39,000		39,000
One Glenlake Building mortgage note	31,390		32,074
215 Diehl Road Building mortgage note	21,000		21,000
Total indebtedness	$	1,535,015	$	1,430,884

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Consolidated Statements of Equity Parentheticals (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Distributions to common stockholders per share (dollars per share)	$ 0.30	$ 0.30
Common Stock
Distributions to common stockholders per share (dollars per share)	$ 0.30	$ 0.3

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Consolidated Balance Sheets Parentheticals (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Buildings and improvements - accumulated depreciation	$ 693,780	$ 660,098
Intangible lease assets - accumulated amortization	316,720	313,822
Allowance for doubtful accounts	0	3
Deferred financing costs, accumulated amortization	15,909	15,205
Intangible lease origination costs, accumulated amortization	220,596	219,626
Deferred lease costs, accumulated amortization	39,338	36,589
Bonds payable, discount	1,246	818
Intangible lease liabilities, accumulated amortization	$ 86,922	$ 84,935
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	125,076,869	124,973,304
Common stock, shares outstanding	125,076,869	124,973,304

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Discontinued Operations

3 Months Ended

Mar. 31, 2015

Discontinued Operation, Additional Disclosures [Abstract]

Discontinued Operations

Discontinued Operations

As a result of implementing Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components on an Entity ("ASU 2014-08") effective April 1, 2014, beginning in the second quarter of 2014, the operating results for properties sold will generally be included in continuing operations. Properties sold prior to implementing ASU 2014-08 are, therefore, included in discontinued operations in the accompanying consolidated statements of operations for all periods presented.

Columbia Property Trust sold 18 properties for $521.5 million in November 2013, resulting in a net loss of $0.4 million (the "18 Property Sale"). The activity reflected in 2014 relates to post-closing adjustments and true ups related to the 18 Property Sale, and no activity has been reclassified to discontinued operations during the three months ended March 31, 2015.

	For the Three Months Ended March 31, 2014
Revenues:
Rental income	$	3
Tenant reimbursements	(51		)
	(48		)
Expenses:
Property operating costs	(347		)
Asset and property management fees	7
General and administrative	18
Total expenses	(322		)
Operating income	274
Other income (expense):
Interest and other income	3
Income from discontinued operations	277
Loss on disposition of discontinued operations	(328		)
Loss from discontinued operations	$	(51	)

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Document Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 24, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	COLUMBIA PROPERTY TRUST, INC.
Entity Central Index Key	0001252849
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		125,077,771

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Earnings Per Share

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

For the three months endedMarch 31, 2015 and 2014, the basic and diluted earnings per-share computations, net income, and income from continuing operations have been reduced for the dividends paid on unvested shares related to unvested awards under the Long-Term Incentive Plan and the 2015 LTIP Employee Grant. The following table reconciles the numerator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015			2014
Net income	$	5,598		$	3,400
Distributions paid on unvested shares	(49		)	(32		)
Net income used to calculate basic and diluted earnings per share	$	5,549		$	3,368

The following table reconciles the denominator for the basic and diluted earnings per-share computations shown on the consolidated statements of income for the three months endedMarch 31, 2015 and 2014, respectively (in thousands):

	Three Months Ended March 31,
	2015	2014
Weighted-average common shares - basic	124,903	124,851
Plus incremental weighted-average shares from time-vested conversions less assumed share repurchases:
Unvested awards under the Long-Term Incentive Plan	17	23
2015 LTIP Employee Grant	15	13
Weighted-average common shares - diluted	124,935	124,887

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Consolidated Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Rental income	$ 112,809	$ 100,567
Tenant reimbursements	28,249	23,733
Hotel income	4,993	4,061
Other property income	1,492	807
Revenues	147,543	129,168
Expenses:
Property operating costs	49,754	38,980
Hotel operating costs	4,591	4,141
Asset and property management fees	397	289
Depreciation	34,007	27,304
Amortization	23,219	18,521
Impairment loss on real estate assets	0	13,550
General and administrative	8,044	6,946
Acquisition expenses	1,995	0
Costs and expenses	122,007	109,731
Real estate operating income	25,536	19,437
Other income (expense):
Interest expense	(21,484)	(17,910)
Interest and other income	1,833	1,810
Loss on interest rate swaps	(6)	(230)
Loss on early extinguishment of debt	(477)	0
Nonoperating income (expense)	(20,134)	(16,330)
Income before income tax benefit	5,402	3,107
Income tax benefit	196	344
Income from continuing operations	5,598	3,451
Discontinued operations:
Operating income from discontinued operations	0	277
Loss on disposition of discontinued operations	0	(328)
Loss from discontinued operations	0	(51)
Net income	$ 5,598	$ 3,400
Per-share information – basic:
Income from continuing operations - basic (dollars per share)	$ 0.04	$ 0.03
Loss from discontinued operations - basic (dollars per share)	$ 0.00	$ 0.00
Net income - basic (dollars per share)	$ 0.04	$ 0.03
Weighted-average common shares outstanding – basic	124,903	124,851
Per-share information – diluted:
Income from continuing operations - diluted (dollars per share)	$ 0.04	$ 0.03
Loss from discontinued operations - diluted (dollars per share)	$ 0.00	$ 0.00
Net income - diluted (dollars per share)	$ 0.04	$ 0.03
Weighted-average common shares outstanding – diluted	124,935	124,887
Dividends per share (dollars per share)	$ 0.30	$ 0.30

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Line of Credit, Term Loan, and Notes Payable

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Line of Credit, Term Loan, and Notes Payable

Line of Credit, Term Loan, and Notes Payable

As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following line of credit, term loan, and notes payable indebtedness (excluding bonds payable; see Note 5, Bonds Payable) in thousands:

Facility	March 31, 2015		December 31, 2014
$450 Million Term Loan	$	450,000	$	450,000
Market Square Buildings mortgage note	325,000		325,000
333 Market Street Building mortgage note	206,625		206,810
650 California Street Building mortgage note	130,000		130,000
JPMorgan Chase Credit Facility	105,000		—
100 East Pratt Street Building mortgage note	105,000		105,000
221 Main Street Building mortgage note	73,000		73,000
263 Shuman Boulevard Building mortgage note	49,000		49,000
SanTan Corporate Center mortgage notes	39,000		39,000
One Glenlake Building mortgage note	31,390		32,074
215 Diehl Road Building mortgage note	21,000		21,000
Total indebtedness	$	1,535,015	$	1,430,884

Bridge Loan

On January 6, 2015, Columbia Property Trust entered into a $300.0 million, six-month, unsecured loan with a syndicate of banks led by JPMorgan Chase Bank (the "Bridge Loan") to finance a portion of the real estate assets purchased in January 2015 (see Note 3, Real Estate Transactions). The Bridge Loan was originally set to mature on July 6, 2015; however, Columbia Property Trust fully repaid the Bridge Loan on March 12, 2015, without premium or penalty, using the proceeds from the 2025 Bonds Payable, as described in Note 5, Bonds Payable. Columbia Property Trust recognized a loss on early extinguishment of debt of $0.5 million as a result of writing off the unamortized deferred financing costs relating to the Bridge Loan.

Fair Value of Debt

The estimated fair value of Columbia Property Trust's line of credit and notes payable as of March 31, 2015 and December 31, 2014, was approximately $1,569.8 million and $1,465.2 million, respectively. Columbia Property Trust estimated the fair value of its JPMorgan Chase Credit Facility (the "JPMorgan Chase Credit Facility") by obtaining estimates for similar facilities from multiple market participants as of the respective reporting dates. Therefore, the fair values determined are considered to be based on observable market data for similar instruments (Level 2). The fair values of all other debt instruments were estimated based on discounted cash flow analyses using the current incremental borrowing rates for similar types of borrowing arrangements as of the respective reporting dates. The discounted cash flow method of assessing fair value results in a general approximation of value, and such value may never actually be realized.

Interest Paid and Capitalized and Debt Covenants

During the three months ended March 31, 2015 and 2014, Columbia Property Trust made interest payments totaling approximately $15.5 million and $13.0 million, respectively, of which approximately $0.1 million was capitalized during the three months ended March 31, 2015, and no interest was capitalized during the three months ended March 31, 2014. As of March 31, 2015, Columbia Property Trust believes it was in compliance with the restrictive financial covenants on its $450 Million Term Loan (the "$450 Million Term Loan"), JPMorgan Chase Credit Facility, and notes payable obligations.

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Real Estate Transactions

3 Months Ended

Mar. 31, 2015

Real Estate [Abstract]

Real Estate Transactions

Real Estate Transactions

Acquisitions

During the three months ended March 31, 2015, Columbia Property Trust acquired the following properties (in thousands):

	315 Park Avenue South Building			1881 Campus Commons Building			116 Huntington Avenue Building
Location	New York, NY			Reston, VA			Boston, MA
Date Acquired	January 7, 2015			January 7, 2015			January 8, 2015
Purchase price:
Land	$	119,746		$	7,186		$	—
Building and improvements	232,547			49,186			108,383
Intangible lease assets	16,916			4,645			7,907
Intangible below market ground lease assets	—			—			30,244
Intangible lease origination costs	4,163			1,607			2,669
Intangible below market lease liability	(7,494		)	(97		)	(1,878		)
Total purchase price	$	365,878		$	62,527		$	147,325

The purchase price for these acquisitions includes allocations based upon preliminary estimates of the fair value of the assets and liabilities acquired. These allocations may be adjusted in the future upon finalization of these preliminary estimates. Note 2, Summary of Significant Accounting Policies, providesa discussion of the estimated useful life for each asset class. Columbia Property Trust did not acquire any properties during the three months ended March 31, 2014.

Columbia Property Trust acquired these three properties in January 2015, in two separate transactions, as described below. The total purchase price of these two transactions of $588.0 million, exclusive of closing costs, was funded with a $300 million bridge loan; $140.0 million of borrowings on the JPMorgan Chase Credit Facility, as described in Note 4, Line of Credit, Term Loan, and Notes Payable; and cash on hand.

Portfolio Acquisition - 315 Park Avenue South Building & 1881 Campus Commons Building

On January 7, 2015, Columbia Property Trust acquired a portfolio of two assets, which included 315 Park Avenue South, a 341,000-square-foot office building in New York, New York (the "315 Park Avenue South Building") and 1881 Campus Commons, a 245,000-square-foot office building in Reston, Virginia (the "1881 Campus Commons Building"). This portfolio was acquired for $436.0 million, exclusive of transaction costs and purchase price adjustments.

As of the acquisition date, the 315 Park Avenue South Building was 94.9% leased to nine tenants, including Credit Suisse (74%). For the period from January 7, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $6.2 million and a net loss of $1.3 million from the 315 Park Avenue South Building. The net loss includes acquisition expenses of $1.2 million.

As of the acquisition date, the 1881 Campus Commons Building was 78.0% leased to 15 tenants, including SOS International (15%) and Siemens (12%). For the period from January 7, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $1.5 million and a net loss of $0.6 million from the 1881 Campus Commons Building. The net loss includes acquisition expenses of $0.5 million.

116 Huntington Avenue Building

On January 8, 2015, Columbia Property Trust acquired a 274,000-square-foot office building in Boston, Massachusetts (the "116 Huntington Avenue Building"), for $152.0 million, inclusive of capital credits. As of the acquisition date, the 116 Huntington Avenue Building was 78.0% leased to 17 tenants, including American Tower (21%), GE Healthcare (13%), and Brigham and Women's (12%). For the period from January 8, 2015 to March 31, 2015, Columbia Property Trust recognized revenues of $2.9 million and a net loss of $0.2 million from the 116 Huntington Avenue Building. The net loss includes acquisition expenses of $0.3 million.

Pro Forma Financial Information

The following unaudited pro forma statements of operations presented for the three months endedMarch 31, 2015 have been prepared for Columbia Property Trust to give effect to the acquisitions of the 315 Park Avenue South Building, the 1881 Campus Commons Building, and the 116 Huntington Avenue Building as if the acquisitions occurred on January 1, 2014. The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2014 (in thousands).

	Three Months Ended March 31,
	2015		2014
Revenues	$	148,258	$	170,025
Net income (loss)	$	7,495	$	(4,563	)
Net income (loss) per share - basic	$	0.06	$	(0.04	)
Net income (loss) per share - diluted	$	0.06	$	(0.04	)

Dispositions

Columbia Property Trust did not dispose of any properties during the three months ended March 31, 2015 or 2014.

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Real Estate Transactions (Tables)

3 Months Ended

Mar. 31, 2015

Real Estate [Abstract]

Schedule of Real Estate Property Acquired

During the three months ended March 31, 2015, Columbia Property Trust acquired the following properties (in thousands):

	315 Park Avenue South Building			1881 Campus Commons Building			116 Huntington Avenue Building
Location	New York, NY			Reston, VA			Boston, MA
Date Acquired	January 7, 2015			January 7, 2015			January 8, 2015
Purchase price:
Land	$	119,746		$	7,186		$	—
Building and improvements	232,547			49,186			108,383
Intangible lease assets	16,916			4,645			7,907
Intangible below market ground lease assets	—			—			30,244
Intangible lease origination costs	4,163			1,607			2,669
Intangible below market lease liability	(7,494		)	(97		)	(1,878		)
Total purchase price	$	365,878		$	62,527		$	147,325

Business Acquisition, Pro Forma Information

The following unaudited pro forma financial results for Columbia Property Trust have been prepared for informational purposes only and are not necessarily indicative of future results or of actual results that would have been achieved had these acquisitions been consummated as of January 1, 2014 (in thousands).

	Three Months Ended March 31,
	2015		2014
Revenues	$	148,258	$	170,025
Net income (loss)	$	7,495	$	(4,563	)
Net income (loss) per share - basic	$	0.06	$	(0.04	)
Net income (loss) per share - diluted	$	0.06	$	(0.04	)

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries

3 Months Ended

Mar. 31, 2015

Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non Guarantor Subsidiaries [Abstract]

Financial Information for Parent Guarantor, Issuer Subsidiary and Non-Guarantor Subsidiaries

Financial Information for Parent Guarantor, Issuer Subsidiary, and Non-Guarantor Subsidiaries

The 2025 Bonds Payable and the 2018 Bonds Payable (see Note 5, Bonds Payable) were issued by Columbia Property Trust OP, and are guaranteed by Columbia Property Trust. In accordance with SEC Rule 3-10(c), Columbia Property Trust includes herein condensed consolidating financial information in lieu of separate financial statements of the subsidiary issuer (Columbia Property Trust OP), as defined in the bond indentures, because all of the following criteria are met:

(1) The subsidiary issuer (Columbia Property Trust OP) is 100% owned by the parent company guarantor (Columbia Property Trust);

(2) The guarantee is full and unconditional; and

(3) No other subsidiary of the parent company guarantor (Columbia Property Trust) guarantees the 2025 Bonds Payable or the 2018 Bonds Payable.

Columbia Property Trust uses the equity method with respect to its investment in subsidiaries included in its condensed consolidating financial statements. Set forth below are Columbia Property Trust's condensed consolidating balance sheets as of March 31, 2015, and December 31, 2014 (in thousands), as well as its condensed consolidating statements of operations and its condensed consolidating statements of comprehensive income for the three months ended March 31, 2015 and 2014 (in thousands); and its condensed consolidating statements of cash flows for the three months ended March 31, 2015 and 2014 (in thousands).

Condensed Consolidating Balance Sheets (in thousands)

	As of March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	905,794	$	—		$	912,035
Buildings and improvements, net	—		30,132		3,359,270		—			3,389,402
Intangible lease assets, net	—		—		291,969		—			291,969
Construction in progress	—		308		26,893		—			27,201
Total real estate assets	—		36,681		4,583,926		—			4,620,607
Cash and cash equivalents	3,521		7,580		20,135		—			31,236
Investment in subsidiaries	2,521,532		2,166,615		—		(4,688,147		)	—
Tenant receivables, net of allowance	—		205		10,654		—			10,859
Straight-line rent receivable	—		1,079		120,019		—			121,098
Prepaid expenses and other assets	177,062		147,788		24,236		(319,358		)	29,728
Deferred financing costs, net	—		8,417		2,236		—			10,653
Intangible lease origination costs, net	—		—		105,759		—			105,759
Deferred lease costs, net	—		1,558		106,110		—			107,668
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608
Liabilities:
Line of credit and notes payable	$	—	$	555,000	$	1,297,829	$	(317,814	)	$	1,535,015
Bonds payable, net	—		598,754		—		—			598,754
Accounts payable, accrued expenses, and accrued capital expenditures	9		14,179		83,785		—			97,973
Due to affiliates	—		26		1,518		(1,544		)	—
Deferred income	—		341		25,347		—			25,688
Intangible lease liabilities, net	—		—		78,072		—			78,072
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	9		1,168,300		1,606,551		(319,358		)	2,455,502
Equity:
Total equity	2,702,106		1,201,623		3,486,524		(4,688,147		)	2,702,106
Total liabilities and equity	$	2,702,115	$	2,369,923	$	5,093,075	$	(5,007,505	)	$	5,157,608

Condensed Consolidating Balance Sheets (in thousands)

	As of December 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Assets:
Real estate assets, at cost:
Land	$	—	$	6,241	$	778,860	$	—		$	785,101
Building and improvements, net	—		29,899		2,996,532		—			3,026,431
Intangible lease assets, net	—		—		247,068		—			247,068
Construction in progress	—		433		17,529		—			17,962
Total real estate assets	—		36,573		4,039,989		—			4,076,562
Cash and cash equivalents	119,488		10,504		19,798		—			149,790
Investment in subsidiaries	2,409,941		2,120,018		—		(4,529,959		)	—
Tenant receivables, net of allowance	—		246		6,699		—			6,945
Straight-line rent receivable	—		781		115,708		—			116,489
Prepaid expenses and other assets	204,079		148,226		19,734		(319,896		)	52,143
Deferred financing costs, net	—		6,020		2,406		—			8,426
Intangible lease origination costs, net	—		—		105,528		—			105,528
Deferred lease costs, net	—		1,658		101,337		—			102,995
Investment in development authority bonds	—		—		120,000		—			120,000
Total assets	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878
Liabilities:
Lines of credit and notes payable	$	—	$	450,000	$	1,299,232	$	(318,348	)	$	1,430,884
Bonds payable, net	—		249,182		—		—			249,182
Accounts payable, accrued expenses, and accrued capital expenditures	30		9,749		96,497		—			106,276
Due to affiliates	—		24		1,524		(1,548		)	—
Deferred income	—		171		24,582		—			24,753
Intangible lease liabilities, net	—		—		74,305		—			74,305
Obligations under capital leases	—		—		120,000		—			120,000
Total liabilities	30		709,126		1,616,140		(319,896		)	2,005,400
Equity:
Total equity	2,733,478		1,614,900		2,915,059		(4,529,959		)	2,733,478
Total liabilities and equity	$	2,733,508	$	2,324,026	$	4,531,199	$	(4,849,855	)	$	4,738,878

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	544		$	112,359		$	(94	)	$	112,809
Tenant reimbursements	—			228			28,021			—			28,249
Hotel income	—			—			4,993			—			4,993
Other property income	—			—			1,563			(71		)	1,492
	—			772			146,936			(165		)	147,543
Expenses:
Property operating costs	—			739			49,109			(94		)	49,754
Hotel operating costs	—			—			4,591			—			4,591
Asset and property management fees:
Related-party	—			14			—			(14		)	—
Other	—			—			397			—			397
Depreciation	—			623			33,384			—			34,007
Amortization	—			56			23,163			—			23,219
General and administrative	38			1,956			6,107			(57		)	8,044
Acquisition expenses	—			—			1,995			—			1,995
	38			3,388			118,746			(165		)	122,007
Real estate operating income (loss)	(38		)	(2,616		)	28,190			—			25,536
Other income (expense):
Interest expense	—			(9,225		)	(16,899		)	4,640			(21,484		)
Interest and other income	1,991			2,657			1,825			(4,640		)	1,833
Loss on interest rate swaps	—			—			(6		)	—			(6		)
Loss on early extinguishment of debt	—			(477		)	—			—			(477		)
Income from equity investment	3,645			12,794			—			(16,439		)	—
	5,636			5,749			(15,080		)	(16,439		)	(20,134		)
Income before income tax benefit (expense)	5,598			3,133			13,110			(16,439		)	5,402
Income tax benefit (expense)	—			(5		)	201			—			196
Net income	$	5,598		$	3,128		$	13,311		$	(16,439	)	$	5,598

Consolidating Statements of Operations (in thousands)

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia  Property Trust OP  (the Issuer)			Non- Guarantors			Consolidating adjustments			Columbia Property Trust (Consolidated)
Revenues:
Rental income	$	—		$	109		$	100,547		$	(89	)	$	100,567
Tenant reimbursements	—			46			23,687			—			23,733
Hotel income	—			—			4,061			—			4,061
Other property income	—			—			844			(37		)	807
	—			155			129,139			(126		)	129,168
Expenses:
Property operating costs	—			610			38,459			(89		)	38,980
Hotel operating costs	—			—			4,141			—			4,141
Asset and property management fees:
Related-party	—			4			—			(4		)	—
Other	—			—			575			(286		)	289
Depreciation	—			381			26,923			—			27,304
Amortization	—			9			18,512			—			18,521
Impairment loss on real estate assets	—			—			13,550			—			13,550
General and administrative	29			2,617			4,333			(33		)	6,946
	29			3,621			106,493			(412		)	109,731
Real estate operating income (loss)	(29		)	(3,466		)	22,646			286			19,437
Other income (expense):
Interest expense	—			(7,434		)	(15,158		)	4,682			(17,910		)
Interest and other income	1,988			2,695			1,809			(4,682		)	1,810
Loss on interest rate swaps	—			—			(230		)	—			(230		)
Income from equity investment	1,441			8,617			—			(10,058		)	—
	3,429			3,878			(13,579		)	(10,058		)	(16,330		)
Income before income tax benefit (expense)	3,400			412			9,067			(9,772		)	3,107
Income tax benefit (expense)	—			(1		)	345			—			344
Income from continuing operations	3,400			411			9,412			(9,772		)	3,451
Discontinued operations:
Operating income from discontinued operations	—			—			277			—			277
Loss on disposition of discontinued operations	—			—			(328		)	—			(328		)
Loss from discontinued operations	—			—			(51		)	—			(51		)
Net income	$	3,400		$	411		$	9,361		$	(9,772	)	$	3,400

Consolidating Statements of Comprehensive Income (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)		Columbia Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	5,598	$	3,128	$	13,311	$	(16,439	)	$	5,598
Market value adjustment to interest rate swap	159		159		—		(159		)	159
Comprehensive income	$	5,757	$	3,287	$	13,311	$	(16,598	)	$	5,757

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)		Columbia  Property Trust OP  (the Issuer)		Non- Guarantors		Consolidating adjustments			Columbia Property Trust (Consolidated)
Net income	$	3,400	$	411	$	9,361	$	(9,772	)	$	3,400
Market value adjustment to interest rate swap	254		254		—		(254		)	254
Comprehensive income	$	3,654	$	665	$	9,361	$	(10,026	)	$	3,654

Consolidating Statements of Cash Flows (in thousands)

	For the Three Months Ended March 31, 2015
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(32	)	$	(10,292	)	$	54,856		$	—		$	44,532
Cash flows from investing activities:
Net proceeds from sale of real estate	—			—			—			—			—
Investment in real estate and related assets	(57,123		)	(494,850		)	(23,364		)	—			(575,337		)
Investments in subsidiaries	(553,203		)	—			—			553,203			—
Net cash used in investing activities	(610,326		)	(494,850		)	(23,364		)	553,203			(575,337		)
Cash flows from financing activities:
Borrowings, net of fees	—			809,078			—			—			809,078
Repayments of notes payable	—			(358,000		)	(684		)	—			(358,684		)
Distributions	(37,523		)	—			—			—			(37,523		)
Shares redeemed to fund income tax withholdings on stock compensation	(620		)	—			—			—			(620		)
Intercompany contributions (distributions)	532,534			51,140			(30,471		)	(553,203		)	—
Net cash provided by (used in) financing activities	494,391			502,218			(31,155		)	(553,203		)	412,251
Net decrease in cash and cash equivalents	(115,967		)	(2,924		)	337			—			(118,554		)
Cash and cash equivalents, beginning of period	119,488			10,504			19,798			—			149,790
Cash and cash equivalents, end of period	$	3,521		$	7,580		$	20,135		$	—		$	31,236

	For the Three Months Ended March 31, 2014
	Columbia Property Trust (Parent) (Guarantor)			Columbia Property Trust OP (the Issuer)			Non- Guarantors			Eliminations			Columbia Property Trust (Consolidated)
Cash flows from operating activities	$	(28	)	$	(9,614	)	$	67,433		$	—		$	57,791
Cash flows from investing activities:
Investment in real estate and related assets	—			(10,932		)	(22,336		)	—			(33,268		)
Intercompany contributions (distributions)	(13,700		)	(12,985		)	—			26,685			—
Net cash used in investing activities	(13,700		)	(23,917		)	(22,336		)	26,685			(33,268		)
Cash flows from financing activities:
Repayments of line of credit and notes payable	—			—			(646		)	—			(646		)
Distributions	(37,489		)	—			—			—			(37,489		)
Intercompany transfers, net	23,392			53,225			(49,932		)	(26,685		)	—
Net cash provided by (used in) financing activities	(14,097		)	53,225			(50,578		)	(26,685		)	(38,135		)
Net increase (decrease) in cash and cash equivalents	(27,825		)	19,694			(5,481		)	—			(13,612		)
Cash and cash equivalents, beginning of period	53,322			20,708			25,825			—			99,855
Cash and cash equivalents, end of period	$	25,497		$	40,402		$	20,344		$	—		$	86,243

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Stockholder's Equity

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Stockholders' Equity

Stockholders' Equity

Long-Term Incentive Plan

Columbia Property Trust maintains a long-term incentive plan that provides for grants of stock to be made to certain employees and independent directors of Columbia Property Trust (the "Long-Term Incentive Plan").Columbia Property Trust's shareholders approved the The Long-Term Incentive Plan in July 2013, and a total of 2,000,000 shares are authorized and reserved for issuance under the Long-Term Incentive Plan.

On January 21, 2015, Columbia Property Trust granted 123,187 shares of common stock to employees, net of 11,368 shares withheld to settle the related tax liability, under the Long-Term Incentive Plan (the "2014 LTIP Employee Grant"), of which 25% vested upon grant, and the remaining shares will vest ratably, with the passage of time, on January 31, 2016, 2017, and 2018. Employees will receive quarterly dividends related to their entire grant, including the unvested shares, on each dividend payment date. A summary of the activity for the employee stock grants under the Long-Term Incentive Plan for the three months ended March 31, 2015 and 2014, follows:

	For the Three Months Ended March 31, 2015
	Shares (in thousands)		Weighted-Average Grant-Date Fair Value(1)
Unvested shares - beginning of period	104		$	24.82
Granted	123		$	24.40
Vested	(65	)	$	24.62
Forfeited	—		$	—
Unvested shares - end of period(2)	162		$	24.58

⁽¹⁾  Columbia Property Trust determined the weighted-average grant-date fair value using the market closing price on the date of the respective grants.

⁽²⁾  As of March 31, 2015, we expect approximately 154,000 of the 162,000 unvested shares to ultimately vest, assuming a forfeiture rate of 5.0%, which was determined based on peer company data, adjusted for the specifics of the Long-Term Incentive Plan.

During the three months ended March 31, 2015 and 2014, Columbia Property Trust paid quarterly installments of the independent directors' annual equity retainers by granting shares to the independent directors, which vested at the time of grant. A summary of these grants, made under the Long-Term Incentive Plan, follows:

Date of Grant	Shares	Grant-Date Fair Value
2015 Director Grants:
January 2, 2015	5,850	$	25.75
April 1, 2015	4,995	$	27.16
2014 Director Grants:
January 21, 2014	3,344	$	24.82
April 1, 2014	2,968	$	27.22

For the three months ended March 31, 2015 and 2014, Columbia Property Trust incurred $1.0 million and $0.5 million, respectively, in stock-based compensation expense, of which $0.1 million and $0.1 million, respectively, related to the issuance of shares to independent directors as described above; $0.6 million and $0.2 million, respectively, related to the amortization of unvested awards under the Long-Term Incentive Plan; and $0.3 million and $0.2 million, respectively, related to future employee awards to be granted for service during this period. These future awards have been authorized, and employee service related to these awards began on January 1, 2015. Columbia Property Trust anticipates granting these awards in January 2016, with 25% of the grant vesting on the grant date and the remaining shares vesting ratably, with the passage of time, on January 31, 2017, 2018, and 2019 (the "2015 LTIP Employee Grant"). These expenses are included in general and administrative expenses in the accompanying consolidated statement of operations. As of March 31, 2015, there was $3.2 million of unrecognized compensation costs related to unvested awards under the Long-Term Incentive Plan. This amount will be amortized over the respective vesting period, ranging from one to three years at the time of grant.

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Bonds Payable

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Bonds Payable

Bonds Payable

In March 2015, Columbia Property Trust OP issued $350.0 million of ten-year, unsecured 4.150% senior notes at 99.859% of their face value (the "2025 Bonds Payable"), which are guaranteed by Columbia Property Trust. Columbia Property Trust OP received proceeds from the 2025 Bonds Payable, net of fees, of $347.2 million. The 2025 Bonds Payable require semi-annual interest payments in April and October based on a contractual annual interest rate of 4.150%. In the accompanying consolidated balance sheets, the 2025 Bonds Payable are shown net of the initial issuance discount of approximately $0.5 million, which will be amortized to interest expense over the term of the 2025 Bonds Payable using the effective interest method. The principal amount of the 2025 Bonds Payable is due and payable on the maturity date, April 1, 2025.

In 2011, Columbia Property Trust OP issued $250.0 million of seven-year, unsecured 5.875% senior notes at 99.295% of their face value (the "2018 Bonds Payable"), which are guaranteed by Columbia Property Trust. Columbia Property Trust OP received proceeds from the 2018 Bonds Payable, net of fees, of $246.7 million. The 2018 Bonds Payable require semi-annual interest payments in April and October based on a contractual annual interest rate of 5.875%, which is subject to adjustment in certain circumstances. In the accompanying consolidated balance sheets, the 2018 Bonds Payable are shown net of the initial issuance discount of approximately $1.8 million, which is amortized to interest expense over the term of the 2018 Bonds Payable using the effective interest method. The principal amount of the 2018 Bonds Payable is due and payable on the maturity date, April 1, 2018.

No interest payments were made on the 2025 Bonds Payable or the 2018 Bonds Payable during the three months ended March 31, 2015 and 2014. Columbia Property Trust is subject to substantially similar covenants under the 2025 Bonds Payable and the 2018 Bonds Payable. As of March 31, 2015, Columbia Property Trust believes it was in compliance with the restrictive covenants on the 2025 Bonds Payable and the 2018 Bonds Payable.

The estimated fair value of the 2025 Bonds Payable and the 2018 Bonds Payable as of March 31, 2015 was approximately $602.6 million, and the estimated fair value of the 2018 Bonds Payable as of December 31, 2014 was $250.6 million, respectively. The fair value of the 2025 Bonds Payable and the 2018 Bonds Payable was estimated based on discounted cash flow analyses using the current incremental borrowing rates for similar types of borrowings as the 2025 Bonds Payable and the 2018 Bonds Payable arrangements as of the respective reporting dates (Level 2). The discounted cash flow method of assessing fair value results in a general approximation of value, and such value may never actually be realized.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments Under Existing Lease Agreements

Certain lease agreements include provisions that, at the option of the tenant, may obligate Columbia Property Trust to expend capital to expand an existing property or provide other expenditures for the benefit of the tenant. As of March 31, 2015, no such options have been exercised that have not been materially satisfied.

Litigation

Columbia Property Trust is subject to various legal proceedings, claims, and administrative proceedings arising in the ordinary course of business, some of which are expected to be covered by liability insurance. Management makes assumptions and estimates concerning the likelihood and amount of any reasonably possible loss relating to these matters using the latest information available. Columbia Property Trust records a liability for litigation if an unfavorable outcome is probable and the amount of loss or range of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, Columbia Property Trust accrues the best estimate within the range. If no amount within the range is a better estimate than any other amount, Columbia Property Trust accrues the minimum amount within the range. If an unfavorable outcome is probable but the amount of the loss cannot be reasonably estimated, Columbia Property Trust discloses the nature of the litigation and indicates that an estimate of the loss or range of loss cannot be made. If an unfavorable outcome is reasonably possible and the estimated loss is material, Columbia Property Trust discloses the nature and estimate of the possible loss of the litigation. Columbia Property Trust does not disclose information with respect to litigation where the possibility of an unfavorable outcome is considered to be remote. Based on current expectations, such matters, both individually and in the aggregate, are not expected to have a material adverse effect on the liquidity, results of operations, business, or financial condition of Columbia Property Trust. Columbia Property Trust is not currently involved in any legal proceedings of which management would consider the outcome to be reasonably likely to have a material adverse effect on the results of operations, liquidity, or financial condition of Columbia Property Trust.

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Supplemental Disclosures of Noncash Investing and Financing Activities

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosures of Noncash Investing and Financing Activities

Supplemental Disclosures of Noncash Investing and Financing Activities

Outlined below are significant noncash investing and financing activities for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015			2014
Investments in real estate funded with other assets	$	27,000		$	—
Other assets assumed at acquisition	$	6,119		$	—
Other liabilities assumed at acquisition	$	2,917		$	—
Discount on issuance of bonds payable	$	494		$	—
Amortization of net (premiums) discounts on debt	$	(119	)	$	(88	)
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	159		$	254
Accrued capital expenditures and deferred lease costs	$	10,153		$	6,669
Accrued deferred financing costs	$	461		$	24
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	$	393		$	189

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Summary of Significant Accounting Policies (Schedule of Future Amortization by Intangible Asset Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net [Abstract]
Intangible lease assets, net	$ 291,969	$ 247,068
Intangible Lease Origination Costs, Net	105,759	105,528
Below Market Lease [Abstract]
For the nine months ending December 31, 2015	14,366
2016	14,624
2017	9,559
2018	7,442
2019	6,738
2020	5,543
Thereafter	19,800
Below Market Lease, Net	78,072	74,305
Above-Market In-Place Lease Assets
Finite-Lived Intangible Assets, Net [Abstract]
For the nine months ending December 31, 2015	3,573
2016	4,039
2017	1,920
2018	1,081
2019	1,035
2020	996
Thereafter	4,982
Intangible lease assets, net	17,626	18,186
Absorption Period Costs
Finite-Lived Intangible Assets, Net [Abstract]
For the nine months ending December 31, 2015	34,139
2016	32,656
2017	19,958
2018	13,497
2019	12,041
2020	10,126
Thereafter	26,766
Intangible lease assets, net	149,183	133,328
Intangible lease origination costs
Finite-Lived Intangible Assets, Net [Abstract]
For the nine months ending December 31, 2015	22,371
2016	23,508
2017	15,972
2018	11,052
2019	9,944
2020	8,434
Thereafter	14,478
Intangible Lease Origination Costs, Net	$ 105,759	$ 105,528

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Financial Information for Parent Guarantor, Other Guarantor Subsidiaries and Non-Guarantor Subsidiaries (Condensed Consolidating Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Assets:
Land	$ 912,035	$ 785,101
Buildings and improvements, net	3,389,402	3,026,431
Intangible lease assets, net	291,969	247,068
Construction in progress	27,201	17,962
Total real estate assets	4,620,607	4,076,562
Cash and cash equivalents	31,236	149,790	86,243	99,855
Investment in subsidiaries	0	0
Tenant receivables, net of allowance	10,859	6,945
Straight-line rent receivable	121,098	116,489
Prepaid expenses and other assets	29,728	52,143
Deferred financing costs, net	10,653	8,426
Intangible lease origination costs, net	105,759	105,528
Deferred lease costs, net	107,668	102,995
Investment in development authority bonds	120,000	120,000
Total assets	5,157,608	4,738,878
Liabilities:
Line of credit and notes payable	1,535,015	1,430,884
Bonds payable, net	598,754	249,182
Accounts payable, accrued expenses, and accrued capital expenditures	97,973	106,276
Due to affiliates	0	0
Deferred income	25,688	24,753
Intangible lease liabilities, net	78,072	74,305
Obligations under capital leases	120,000	120,000
Total liabilities	2,455,502	2,005,400
Equity:
Total equity	2,702,106	2,733,478	2,754,178	2,787,823
Total liabilities and equity	5,157,608	4,738,878
Reportable Legal Entities | Columbia Property Trust (Parent) (Guarantor)
Assets:
Land	0	0
Buildings and improvements, net	0	0
Intangible lease assets, net	0	0
Construction in progress	0	0
Total real estate assets	0	0
Cash and cash equivalents	3,521	119,488	25,497	53,322
Investment in subsidiaries	2,521,532	2,409,941
Tenant receivables, net of allowance	0	0
Straight-line rent receivable	0	0
Prepaid expenses and other assets	177,062	204,079
Deferred financing costs, net	0	0
Intangible lease origination costs, net	0	0
Deferred lease costs, net	0	0
Investment in development authority bonds	0	0
Total assets	2,702,115	2,733,508
Liabilities:
Line of credit and notes payable	0	0
Bonds payable, net	0	0
Accounts payable, accrued expenses, and accrued capital expenditures	9	30
Due to affiliates	0	0
Deferred income	0	0
Intangible lease liabilities, net	0	0
Obligations under capital leases	0	0
Total liabilities	9	30
Equity:
Total equity	2,702,106	2,733,478
Total liabilities and equity	2,702,115	2,733,508
Reportable Legal Entities | Columbia Property Trust OP (the Issuer)
Assets:
Land	6,241	6,241
Buildings and improvements, net	30,132	29,899
Intangible lease assets, net	0	0
Construction in progress	308	433
Total real estate assets	36,681	36,573
Cash and cash equivalents	7,580	10,504	40,402	20,708
Investment in subsidiaries	2,166,615	2,120,018
Tenant receivables, net of allowance	205	246
Straight-line rent receivable	1,079	781
Prepaid expenses and other assets	147,788	148,226
Deferred financing costs, net	8,417	6,020
Intangible lease origination costs, net	0	0
Deferred lease costs, net	1,558	1,658
Investment in development authority bonds	0	0
Total assets	2,369,923	2,324,026
Liabilities:
Line of credit and notes payable	555,000	450,000
Bonds payable, net	598,754	249,182
Accounts payable, accrued expenses, and accrued capital expenditures	14,179	9,749
Due to affiliates	26	24
Deferred income	341	171
Intangible lease liabilities, net	0	0
Obligations under capital leases	0	0
Total liabilities	1,168,300	709,126
Equity:
Total equity	1,201,623	1,614,900
Total liabilities and equity	2,369,923	2,324,026
Reportable Legal Entities | Non- Guarantors
Assets:
Land	905,794	778,860
Buildings and improvements, net	3,359,270	2,996,532
Intangible lease assets, net	291,969	247,068
Construction in progress	26,893	17,529
Total real estate assets	4,583,926	4,039,989
Cash and cash equivalents	20,135	19,798	20,344	25,825
Investment in subsidiaries	0	0
Tenant receivables, net of allowance	10,654	6,699
Straight-line rent receivable	120,019	115,708
Prepaid expenses and other assets	24,236	19,734
Deferred financing costs, net	2,236	2,406
Intangible lease origination costs, net	105,759	105,528
Deferred lease costs, net	106,110	101,337
Investment in development authority bonds	120,000	120,000
Total assets	5,093,075	4,531,199
Liabilities:
Line of credit and notes payable	1,297,829	1,299,232
Bonds payable, net	0	0
Accounts payable, accrued expenses, and accrued capital expenditures	83,785	96,497
Due to affiliates	1,518	1,524
Deferred income	25,347	24,582
Intangible lease liabilities, net	78,072	74,305
Obligations under capital leases	120,000	120,000
Total liabilities	1,606,551	1,616,140
Equity:
Total equity	3,486,524	2,915,059
Total liabilities and equity	5,093,075	4,531,199
Consolidating adjustments
Assets:
Land	0	0
Buildings and improvements, net	0	0
Intangible lease assets, net	0	0
Construction in progress	0	0
Total real estate assets	0	0
Cash and cash equivalents	0	0	0	0
Investment in subsidiaries	(4,688,147)	(4,529,959)
Tenant receivables, net of allowance	0	0
Straight-line rent receivable	0	0
Prepaid expenses and other assets	(319,358)	(319,896)
Deferred financing costs, net	0	0
Intangible lease origination costs, net	0	0
Deferred lease costs, net	0	0
Investment in development authority bonds	0	0
Total assets	(5,007,505)	(4,849,855)
Liabilities:
Line of credit and notes payable	(317,814)	(318,348)
Bonds payable, net	0	0
Accounts payable, accrued expenses, and accrued capital expenditures	0	0
Due to affiliates	(1,544)	(1,548)
Deferred income	0	0
Intangible lease liabilities, net	0	0
Obligations under capital leases	0	0
Total liabilities	(319,358)	(319,896)
Equity:
Total equity	(4,688,147)	(4,529,959)
Total liabilities and equity	$ (5,007,505)	$ (4,849,855)

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The consolidated financial statements of Columbia Property Trust have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by U.S. generally accepted accounting principles ("GAAP") for complete financial statements. In the opinion of management, the statements for these unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair and consistent presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year's results. Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia Property Trust OP, and any variable interest entity in which Columbia Property Trust or Columbia Property Trust OP was deemed the primary beneficiary. With respect to entities that are not variable interest entities, Columbia Property Trust's consolidated financial statements also include the accounts of any entity in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling financial interest and any limited partnership in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling general partnership interest. All intercompany balances and transactions have been eliminated in consolidation.

Fair Value Measurements

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification ("ASC") 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Real Estate Assets

Real Estate Assets

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. Columbia Property Trust considers the period of future benefit of the asset to determine the appropriate useful lives. These assessments have a direct impact on net income. The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Evaluating the Recoverability of Real Estate Assets

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets, of both operating properties and properties under construction, in which Columbia Property Trust has an ownership interest, either directly or through investments in joint ventures, may not be recoverable. When indicators of potential impairment are present that suggest that the carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these assets and liabilities by determining whether the respective carrying values will be recovered through the estimated undiscounted future operating cash flows expected from the use of the assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying value of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. Estimated fair values are calculated based on the following information, in order of preference, depending upon availability: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated salvage value. Certain of Columbia Property Trust's assets may be carried at more than an amount that could be realized in a current disposition transaction. Columbia Property Trust has determined that there is no additional impairment in the carrying values of our real estate assets and related intangible assets for the three months ended March 31, 2015.

Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. The subjectivity of assumptions used in the future cash flow analysis, including discount rates, could result in an incorrect assessment of the property's fair value and could result in the misstatement of the carrying value of Columbia Property Trust's real estate assets and related intangible assets and liabilities and net income.

Assets Held for Sale

Assets Held for Sale

Columbia Property Trust classifies assets as held for sale according to ASC 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, assets are considered held for sale when the following criteria are met:

• Management, having the authority to approve the action, commits to a plan to sell the property.

• The property is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such property.

• An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

• The sale of the property is probable, and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

• The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

• Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

At such time that a property is determined to be held for sale, its carrying amount is reduced to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized.

Intangible Assets and Liabilities Arising from In-Place Leases

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessee

In-place ground leases where Columbia Property Trust is the lessee may have value associated with effective contractual rental rates that are above or below market rates at the time of execution or assumption. Such values are calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place lease and (ii) management's estimate of fair market lease rates for the corresponding in-place lease at the time of execution or assumption, measured over a period equal to the remaining terms of the leases. The capitalized above-market and below-market in-place lease values are recorded as intangible lease liabilities and assets, respectively, and are amortized as an adjustment to property operating cost over the remaining term of the respective leases.

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessor

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see Fair Value Measurements section above for additional detail).

Prepaid Expenses and Other Assets

Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, non-tenant receivables, prepaid taxes, insurance and operating costs, certain corporate assets, hotel inventory, and deferred tax assets. Prepaid expenses and other assets will be expensed as incurred.

Interest Rate Swap Agreements

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate swap transactions for speculative purposes; however, certain of its derivatives may not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of the effective portion of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income, while changes in the fair value of the ineffective portion of a hedge, if any, is recognized currently in earnings. Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain (loss) on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as gain (loss) on interest rate swaps for contracts that do not qualify for hedge accounting treatment.

Income Taxes

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the "Code"), and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. As a REIT, Columbia Property Trust generally is not subject to income tax on income it distributes to stockholders. Columbia Property Trust's stockholder distributions typically exceed its taxable income due to the inclusion of noncash expenses, such as depreciation, in taxable income. As a result, Columbia Property Trust typically does not incur federal income taxes other than as described in the following paragraph. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC ("Columbia Property Trust TRS"), Columbia KCP TRS, LLC ("Columbia KCP TRS"), and Columbia Energy TRS, LLC ("Columbia Energy TRS") (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust, are organized as Delaware limited liability companies, and operate, among other things, office properties that Columbia Property Trust does not intend to hold long term and a full-service hotel. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 25% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"), which establishes a comprehensive model to account for revenue arising from contracts with customers. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB's Accounting Standards Codification such as real estate leases. ASU 2014-09 will require companies to perform a five-step analysis of transactions to determine when and how revenue is recognized. ASU 2014-09 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2018, and early adoption is not permitted. Columbia Property Trust is currently in the process of evaluating the potential impact, if any, ASU 2014-09 will have on its financial statements and disclosures.

In August 2014, the FASB issued Accounting Standards Update 2014-15, Presentation of Financial Statements – Going Concern ("ASU 2014-15"), which provides guidance about the responsibility of management to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures if necessary. ASU 2014-15 will be effective prospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2014-15 to have a material impact on its financial statements and disclosures.

In February 2015, the FASB issued Accounting Standards Update 2015-02, Amendments to the Consolidation Analysis (“ASU 2015-02”), which requires the reevaluation of certain legal entities for consolidation, including limited partnerships, variable interest entities ("VIEs"), and reporting entities that are involved with VIEs. ASU 2015-02 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2015-02 to have a material impact on its financial statements and disclosures.

In April 2015, the FASB issued Accounting Standards Update 2015-03, Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”), which requires that deferred financing costs be presented on the balance sheet as a direct deduction of the carrying amount of the related debt. ASU 2015-03 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2016, and early adoption is permitted. Columbia Property Trust is currently in the process of evaluating additional potential impacts of ASU 2015-03 will have on its financial statements and disclosures.

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Supplemental Disclosures of Noncash Investing and Financing Activities (Tables)

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Information [Abstract]

Schedule of Other Significant Noncash Transactions

Outlined below are significant noncash investing and financing activities for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015			2014
Investments in real estate funded with other assets	$	27,000		$	—
Other assets assumed at acquisition	$	6,119		$	—
Other liabilities assumed at acquisition	$	2,917		$	—
Discount on issuance of bonds payable	$	494		$	—
Amortization of net (premiums) discounts on debt	$	(119	)	$	(88	)
Market value adjustment to interest rate swaps that qualify for hedge accounting treatment	$	159		$	254
Accrued capital expenditures and deferred lease costs	$	10,153		$	6,669
Accrued deferred financing costs	$	461		$	24
Common stock issued to employees and directors, and amortized (net of amounts withheld for income taxes)	$	393		$	189

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Earnings Per Share (Basic and Diluted EPS Computations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 5,598	$ 3,400
Distributions paid on unvested shares	(49)	(32)
Net income used to calculate basic and diluted earnings per share	$ 5,549	$ 3,368
Weighted-average common shares - basic	124,903	124,851
Weighted-average common shares - diluted	124,935	124,887
Unvested awards under the Long-Term Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Plus incremental weighted-average shares from time-vested conversions less assumed share repurchases:	17	23
2015 LTIP Employee Grant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Plus incremental weighted-average shares from time-vested conversions less assumed share repurchases:	15	13

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Line of Credit, Term Loan, and Notes Payable (Details) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2011	Mar. 12, 2015	Jan. 06, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Loss on early extinguishment of debt	$ 477,000	$ 0
$450 Million Term Loan Amended
Debt Instrument [Line Items]
Debt face amount	450,000,000.0
Bonds Payable
Debt Instrument [Line Items]
Maturity of debt instrument			7 years
Bonds Payable | JPMorgan Chase Term Loan
Debt Instrument [Line Items]
Debt face amount					300,000,000.0
Maturity of debt instrument					6 months
Loss on early extinguishment of debt				500,000
Loans Payable
Debt Instrument [Line Items]
Estimated fair value of line of credit and notes payable	1,569,800,000					1,465,200,000
Interest payments	15,500,000	13,000,000
Interest capitalized	$ 100,000	$ 0

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Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 5,598	$ 3,400
Market value adjustment to interest rate swap	159	254
Comprehensive income	$ 5,757	$ 3,654

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements of Columbia Property Trust have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by U.S. generally accepted accounting principles ("GAAP") for complete financial statements. In the opinion of management, the statements for these unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair and consistent presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year's results. Columbia Property Trust's consolidated financial statements include the accounts of Columbia Property Trust, Columbia Property Trust OP, and any variable interest entity in which Columbia Property Trust or Columbia Property Trust OP was deemed the primary beneficiary. With respect to entities that are not variable interest entities, Columbia Property Trust's consolidated financial statements also include the accounts of any entity in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling financial interest and any limited partnership in which Columbia Property Trust, Columbia Property Trust OP, or their subsidiaries own a controlling general partnership interest. All intercompany balances and transactions have been eliminated in consolidation. For further information, refer to the financial statements and footnotes included in Columbia Property Trust's Annual Report on Form 10-K for the year ended December 31, 2014 (the "2014 Form 10-K").

Fair Value Measurements

Columbia Property Trust estimates the fair value of its assets and liabilities (where currently required under GAAP) consistent with the provisions of Accounting Standard Codification ("ASC") 820, Fair Value Measurements ("ASC 820"). Under this standard, fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date. While various techniques and assumptions can be used to estimate fair value depending on the nature of the asset or liability, the accounting standard for fair value measurements and disclosures provides the following fair value technique parameters and hierarchy, depending upon availability:

Level 1 – Assets or liabilities for which the identical term is traded on an active exchange, such as publicly traded instruments or futures contracts.

Level 2 – Assets and liabilities valued based on observable market data for similar instruments.

Level 3 – Assets or liabilities for which significant valuation assumptions are not readily observable in the market. Such assets or liabilities are valued based on the best available data, some of which may be internally developed. Significant assumptions may include risk premiums that a market participant would consider.

Real Estate Assets

Columbia Property Trust is required to make subjective assessments as to the useful lives of its depreciable assets. Columbia Property Trust considers the period of future benefit of the asset to determine the appropriate useful lives. These assessments have a direct impact on net income. The estimated useful lives of its assets by class are as follows:

Buildings	40 years
Building and site improvements	5-25 years
Tenant improvements	Shorter of economic life or lease term
Intangible lease assets	Lease term

Evaluating the Recoverability of Real Estate Assets

Columbia Property Trust continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets, of both operating properties and properties under construction, in which Columbia Property Trust has an ownership interest, either directly or through investments in joint ventures, may not be recoverable. When indicators of potential impairment are present that suggest that the carrying amounts of real estate assets and related intangible assets and liabilities may not be recoverable, Columbia Property Trust assesses the recoverability of these assets and liabilities by determining whether the respective carrying values will be recovered through the estimated undiscounted future operating cash flows expected from the use of the assets and their eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying values, Columbia Property Trust adjusts the carrying value of the real estate assets and related intangible assets and liabilities to the estimated fair values, pursuant to the property, plant, and equipment accounting standard for the impairment or disposal of long-lived assets, and recognizes an impairment loss. Estimated fair values are calculated based on the following information, in order of preference, depending upon availability: (i) recently quoted market prices, (ii) market prices for comparable properties, or (iii) the present value of future cash flows, including estimated salvage value. Certain of Columbia Property Trust's assets may be carried at more than an amount that could be realized in a current disposition transaction. Columbia Property Trust has determined that there is no additional impairment in the carrying values of our real estate assets and related intangible assets for the three months ended March 31, 2015.

Projections of expected future operating cash flows require that Columbia Property Trust estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. The subjectivity of assumptions used in the future cash flow analysis, including discount rates, could result in an incorrect assessment of the property's fair value and could result in the misstatement of the carrying value of Columbia Property Trust's real estate assets and related intangible assets and liabilities and net income.

In the first quarter of 2014, Columbia Property Trust revised its investment strategy for the 160 Park Avenue Building in Florham Park, New Jersey, to sell the property to a user in the near term. As a result, management reduced its intended holding period for the building and reevaluated the property's carrying value as of March 31, 2014, pursuant to the accounting policy outlined above. Columbia Property Trust concluded that the 160 Park Avenue Building was not recoverable and reduced its carrying value to reflect its fair value, estimated based on recently quoted market prices (Level 2), by recording an impairment loss of approximately $13.6 million in the first quarter of 2014. The sale of the160 Park Avenue Building closed on June 4, 2014, for $10.2 million, exclusive of transaction costs.

Assets Held for Sale

Columbia Property Trust classifies assets as held for sale according to ASC 360, Accounting for the Impairment or Disposal of Long-Lived Assets ("ASC 360"). According to ASC 360, assets are considered held for sale when the following criteria are met:

• Management, having the authority to approve the action, commits to a plan to sell the property.

• The property is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such property.

• An active program to locate a buyer and other actions required to complete the plan to sell the property have been initiated.

• The sale of the property is probable, and transfer of the property is expected to qualify for recognition as a completed sale, within one year.

• The property is being actively marketed for sale at a price that is reasonable in relation to its current fair value.

• Actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

At such time that a property is determined to be held for sale, its carrying amount is reduced to the lower of its depreciated book value or its estimated fair value, less costs to sell, and depreciation is no longer recognized. As of March 31, 2015, none of Columbia Property Trust's properties met the criteria to be classified as held for sale in the accompanying balance sheet.

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessor

Upon the acquisition of real properties, Columbia Property Trust allocates the purchase price of properties to tangible assets, consisting of land, building, site improvements, and identified intangible assets and liabilities, including the value of in-place leases, based in each case on Columbia Property Trust's estimate of their fair values in accordance with ASC 820 (see Fair Value Measurements section above for additional detail). As of March 31, 2015 and December 31, 2014, Columbia Property Trust had the following gross intangible in-place lease assets and liabilities (in thousands):

		Intangible Lease Assets						Intangible Lease Origination Costs			Intangible Below-Market In-Place Lease Liabilities
		Above-Market In-Place Lease Assets			Absorption Period Costs
March 31, 2015	Gross	$	77,271		$	390,502		$	326,355		$	164,994
	Accumulated Amortization	(59,645		)	(241,319		)	(220,596		)	(86,922		)
	Net	$	17,626		$	149,183		$	105,759		$	78,072
December 31, 2014	Gross	$	79,805		$	370,412		$	325,154		$	159,240
	Accumulated Amortization	(61,619		)	(237,084		)	(219,626		)	(84,935		)
	Net	$	18,186		$	133,328		$	105,528		$	74,305

Columbia Property Trust recognized the following amortization of intangible lease assets and liabilities (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the three months ended March 31, 2015	$	1,367	$	12,362	$	8,157	$	5,411
For the three months ended March 31, 2014	$	1,356	$	8,073	$	8,432	$	3,081

The remaining net intangible assets and liabilities as of March 31, 2015, will be amortized as follows (in thousands):

	Intangible Lease Assets				Intangible Lease Origination Costs		Intangible Below-Market In-Place Lease Liabilities
	Above-Market In-Place Lease Assets		Absorption Period Costs
For the nine months ending December 31, 2015	$	3,573	$	34,139	$	22,371	$	14,366
For the years ending December 31:
2016	4,039		32,656		23,508		14,624
2017	1,920		19,958		15,972		9,559
2018	1,081		13,497		11,052		7,442
2019	1,035		12,041		9,944		6,738
2020	996		10,126		8,434		5,543
Thereafter	4,982		26,766		14,478		19,800
	$	17,626	$	149,183	$	105,759	$	78,072

Intangible Assets and Liabilities Arising from In-Place Leases where Columbia Property Trust Is the Lessee

In-place ground leases where Columbia Property Trust is the lessee may have value associated with effective contractual rental rates that are above or below market rates at the time of execution or assumption. Such values are calculated based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place lease and (ii) management's estimate of fair market lease rates for the corresponding in-place lease at the time of execution or assumption, measured over a period equal to the remaining terms of the leases. The capitalized above-market and below-market in-place lease values are recorded as intangible lease liabilities and assets, respectively, and are amortized as an adjustment to property operating cost over the remaining term of the respective leases. Columbia Property Trust had gross below-market lease assets of approximately $140.9 million and $110.7 million as of March 31, 2015 and December 31, 2014, respectively, and recognized amortization of these assets of approximately $0.6 million and $0.5 million for the three months ended March 31, 2015 and 2014, respectively.

As of March 31, 2015, the remaining net below-market lease assets will be amortized as follows (in thousands):

For the nine months ending December 31, 2015	$	1,912
For the years ending December 31:
2016	2,549
2017	2,549
2018	2,549
2019	2,549
2020	2,549
Thereafter	110,502
	$	125,159

Prepaid Expenses and Other Assets

Prepaid expenses and other assets primarily include earnest money deposits, escrow accounts held by lenders to pay future real estate taxes, insurance and tenant improvements, notes receivable, non-tenant receivables, prepaid taxes, insurance and operating costs, certain corporate assets, hotel inventory, and deferred tax assets. Prepaid expenses and other assets will be expensed as incurred. As of December 31, 2014, prepaid expenses and other assets included $27.0 million of earnest money deposits paid in 2014 for the January 2015 property acquisitions described in Note 3, Real Estate Transactions. These deposits were applied to the purchase prices at closing.

Interest Rate Swap Agreements

Columbia Property Trust enters into interest rate swap contracts to mitigate its interest rate risk on the related financial instruments. Columbia Property Trust does not enter into derivative or interest rate swap transactions for speculative purposes; however, certain of its derivatives may not qualify for hedge accounting treatment. Columbia Property Trust records the fair value of its interest rate swaps either as prepaid expenses and other assets or as accounts payable, accrued expenses, and accrued capital expenditures. Changes in the fair value of the effective portion of interest rate swaps that are designated as cash flow hedges are recorded as other comprehensive income, while changes in the fair value of the ineffective portion of a hedge, if any, is recognized currently in earnings. Changes in the fair value of interest rate swaps that do not qualify for hedge accounting treatment are recorded as gain (loss) on interest rate swaps. Amounts received or paid under interest rate swap agreements are recorded as interest expense for contracts that qualify for hedge accounting treatment and as gain (loss) on interest rate swaps for contracts that do not qualify for hedge accounting treatment.

The following tables provide additional information related to Columbia Property Trust's interest rate swaps (in thousands):

		Estimated Fair Value as of
Instrument Type	Balance Sheet Classification	March 31, 2015			December 31, 2014
Derivatives designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,809	)	$	(1,968	)
Derivatives not designated as hedging instruments:
Interest rate contracts	Accounts payable	$	(1,318	)	$	(2,633	)

Columbia Property Trust applied the provisions of ASC 820 in recording its interest rate swaps at fair value. The fair values of the interest rate swaps, classified under Level 2, were determined using a third-party proprietary model that is based on prevailing market data for contracts with matching durations, current and anticipated London Interbank Offered Rate ("LIBOR") information, and reasonable estimates about relevant future market conditions. Columbia Property Trust has determined that the fair value, as determined by the third party, is reasonable. The fair value of Columbia Property Trust's interest rate swaps was $(3.1) million and $(4.6) million at March 31, 2015 and December 31, 2014, respectively.

	Three Months Ended March 31,
	2015			2014
Market value adjustment to interest rate swaps designated as hedging instruments and included in other comprehensive income	$	159		$	254
Loss on interest rate swap recognized through earnings	$	(6	)	$	(230	)

During the periods presented, there was no hedge ineffectiveness required to be recognized into earnings on the interest rate swaps that qualified for hedge accounting treatment.

Income Taxes

Columbia Property Trust has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the "Code"), and has operated as such beginning with its taxable year ended December 31, 2003. To qualify as a REIT, Columbia Property Trust must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its REIT taxable income, as defined by the Code, to its stockholders. As a REIT, Columbia Property Trust generally is not subject to income tax on income it distributes to stockholders. Columbia Property Trust's stockholder distributions typically exceed its taxable income due to the inclusion of noncash expenses, such as depreciation, in taxable income. As a result, Columbia Property Trust typically does not incur federal income taxes other than as described in the following paragraph. Columbia Property Trust is, however, subject to certain state and local taxes related to the operations of properties in certain locations, which have been provided for in the accompanying consolidated financial statements.

Columbia Property Trust TRS, LLC ("Columbia Property Trust TRS"), Columbia KCP TRS, LLC ("Columbia KCP TRS"), and Columbia Energy TRS, LLC ("Columbia Energy TRS") (collectively, the "TRS Entities") are wholly owned subsidiaries of Columbia Property Trust, are organized as Delaware limited liability companies, and operate, among other things, office properties that Columbia Property Trust does not intend to hold long term and a full-service hotel. Columbia Property Trust has elected to treat the TRS Entities as taxable REIT subsidiaries. Columbia Property Trust may perform certain additional, noncustomary services for tenants of its buildings through the TRS Entities; however, any earnings related to such services are subject to federal and state income taxes. In addition, for Columbia Property Trust to continue to qualify as a REIT, Columbia Property Trust must limit its investments in taxable REIT subsidiaries to 25% of the value of the total assets. The TRS Entities' deferred tax assets and liabilities represent temporary differences between the financial reporting basis and the tax basis of assets and liabilities based on the enacted rates expected to be in effect when the temporary differences reverse. If applicable, Columbia Property Trust records interest and penalties related to uncertain tax positions as general and administrative expense in the accompanying consolidated statements of operations.

Recent Accounting Pronouncements

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"), which establishes a comprehensive model to account for revenue arising from contracts with customers. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB's Accounting Standards Codification such as real estate leases. ASU 2014-09 will require companies to perform a five-step analysis of transactions to determine when and how revenue is recognized. ASU 2014-09 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2018, and early adoption is not permitted. Columbia Property Trust is currently in the process of evaluating the potential impact, if any, ASU 2014-09 will have on its financial statements and disclosures.

In August 2014, the FASB issued Accounting Standards Update 2014-15, Presentation of Financial Statements – Going Concern ("ASU 2014-15"), which provides guidance about the responsibility of management to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures if necessary. ASU 2014-15 will be effective prospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2014-15 to have a material impact on its financial statements and disclosures.

In February 2015, the FASB issued Accounting Standards Update 2015-02, Amendments to the Consolidation Analysis (“ASU 2015-02”), which requires the reevaluation of certain legal entities for consolidation, including limited partnerships, variable interest entities ("VIEs"), and reporting entities that are involved with VIEs. ASU 2015-02 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2017, and early adoption is permitted. Columbia Property Trust does not expect the adoption of ASU 2015-02 to have a material impact on its financial statements and disclosures.

In April 2015, the FASB issued Accounting Standards Update 2015-03, Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”), which requires that deferred financing costs be presented on the balance sheet as a direct deduction of the carrying amount of the related debt. ASU 2015-03 will be effective retrospectively for Columbia Property Trust beginning on January 1, 2016, and early adoption is permitted. Columbia Property Trust is currently in the process of evaluating additional potential impacts of ASU 2015-03 will have on its financial statements and disclosures.

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Discontinued Operations (Tables)

3 Months Ended

Mar. 31, 2015

Discontinued Operation, Additional Disclosures [Abstract]

Schedule of revenues and expenses of the above-described discontinued operations

The activity reflected in 2014 relates to post-closing adjustments and true ups related to the 18 Property Sale, and no activity has been reclassified to discontinued operations during the three months ended March 31, 2015.

	For the Three Months Ended March 31, 2014
Revenues:
Rental income	$	3
Tenant reimbursements	(51		)
	(48		)
Expenses:
Property operating costs	(347		)
Asset and property management fees	7
General and administrative	18
Total expenses	(322		)
Operating income	274
Other income (expense):
Interest and other income	3
Income from discontinued operations	277
Loss on disposition of discontinued operations	(328		)
Loss from discontinued operations	$	(51	)

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Real Estate Transactions (Acquisitions) (Details) (USD $)	1 Months Ended	3 Months Ended			0 Months Ended
	Jan. 31, 2015 transaction Properties	Mar. 31, 2015 sqft	Mar. 31, 2014	Mar. 31, 2015	Jan. 08, 2015	Jan. 07, 2015	Jan. 06, 2015
Business Acquisition [Line Items]
Number of real estate properties acquired	3
Number of transactions	2
Real estate acquisitions		$ 551,277,000	$ 0
Square feet of real estate		16,600,000		16,600,000
Percent of leased office space of owned properties		92.30%		92.30%
Acquisition expenses		1,995,000	0
315 Park Avenue South Building
Business Acquisition [Line Items]
Revenue recognized since acquisition date				6,200,000
Net loss recognized since acquisition date				1,300,000
Acquisition expenses				1,200,000
1881 Campus Commons Building
Business Acquisition [Line Items]
Revenue recognized since acquisition date				1,500,000
Net loss recognized since acquisition date				600,000
Acquisition expenses				500,000
116 Huntington Avenue Building
Business Acquisition [Line Items]
Revenue recognized since acquisition date					2,900,000
Net loss recognized since acquisition date					200,000
Acquisition expenses					300,000
Customer Concentration Risk | Credit Suisse | 315 Park Avenue South Building
Business Acquisition [Line Items]
Concentration risk percentage						74.00%
Customer Concentration Risk | SOS International | 1881 Campus Commons Building
Business Acquisition [Line Items]
Concentration risk percentage						15.00%
Customer Concentration Risk | Siemens | 1881 Campus Commons Building
Business Acquisition [Line Items]
Concentration risk percentage						12.00%
Customer Concentration Risk | American Tower | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Concentration risk percentage					21.00%
Customer Concentration Risk | GE Healthcare | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Concentration risk percentage					13.00%
Customer Concentration Risk | Brigham and Women's | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Concentration risk percentage					12.00%
Office Building
Business Acquisition [Line Items]
Real estate acquisitions	588,000,000
Number of real estate properties		38		38
Office Building | 315 Park Avenue South Building
Business Acquisition [Line Items]
Square feet of real estate						341,000
Percent of leased office space of owned properties						94.90%
Number of customers						9
Office Building | 1881 Campus Commons Building
Business Acquisition [Line Items]
Square feet of real estate						245,000
Percent of leased office space of owned properties						78.00%
Number of customers						15
Office Building | 116 Huntington Avenue Building
Business Acquisition [Line Items]
Real estate acquisitions					152,000,000
Square feet of real estate					274,000
Percent of leased office space of owned properties					78.00%
Number of customers					17
Office Building | 315 Park Avenue South and 1881 Campus Commons Building
Business Acquisition [Line Items]
Real estate acquisitions						436,000,000
Number of real estate properties						2
Bonds Payable | JPMorgan Chase Term Loan
Business Acquisition [Line Items]
Debt face amount							300,000,000.0
Credit Facilities | JPMorgan Chase Credit Facility
Business Acquisition [Line Items]
Proceeds from lines of credit							$ 140,000,000

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Subsequent Event

3 Months Ended

Mar. 31, 2015

Subsequent Events [Abstract]

Subsequent Event

Subsequent Event

Columbia Property Trust has evaluated subsequent events in connection with the preparation of the consolidated financial statements and notes thereto included in this report on Form 10-Q and did not note any additional subsequent events, other than those disclosed elsewhere in this report.