City Office REIT (CIO) 10-Q 14 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 12, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'CIO	'
Entity Registrant Name	'City Office REIT, Inc.	'
Entity Central Index Key	'0001593222	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	6,582,150

Condensed_Consolidated_and_Com

Condensed Consolidated and Combined Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
		Predecessor [Member]
Assets	'	'
Land	$57,673,760	$30,164,513
Building and improvement	97,665,522	62,908,338
Tenant improvement	22,507,580	14,590,971
Furniture, fixtures and equipment	198,114	198,114
Real estate properties, gross	178,044,976	107,861,936
Accumulated depreciation	-10,949,359	-7,735,450
Real estate properties, net	167,095,617	100,126,486
Investments in unconsolidated entity	'	4,337,899
Cash and cash equivalents	10,175,937	7,127,764
Restricted cash	12,809,664	7,368,124
Rents receivable, net	6,287,588	4,680,284
Deferred financing costs, net of accumulated amortization	2,734,641	1,167,666
Deferred leasing costs, net of accumulated amortization	2,482,529	2,302,841
Acquired lease intangibles assets, net	25,281,548	13,751,563
Prepaid expenses and other assets	2,386,945	296,572
Deferred offering costs	'	1,830,950
Total Assets	229,254,469	142,990,149
Liabilities:	'	'
Debt	155,002,462	109,916,430
Accounts payable and accrued liabilities	4,817,775	2,347,999
Deferred rent	438,770	1,488,618
Tenant rent deposits	1,861,194	1,361,641
Acquired lease intangibles liability, net	692,085	167,346
Dividends payable	2,094,400	'
Earn-out liability	7,057,351	'
Total Liabilities	171,964,037	115,282,034
Commitments and Contingencies (Note 9)	'	'
Equity:	'	'
Common stock, $0.01 par value, 100,000,000 shares authorized, 8,192,915 shares issued and outstanding	81,939	'
Additional paid in capital	45,121,480	'
Accumulated deficit	-3,443,504	'
Predecessor equity	'	26,624,375
Total Stockholders' and Predecessor Equity	41,759,915	26,624,375
Operating Partnership unitholders' noncontrolling interests	16,274,888	'
Noncontrolling interests in properties	-744,371	1,083,740
Total Equity	57,290,432	27,708,115
Total Liabilities and Equity	$229,254,469	$142,990,149

Condensed_Consolidated_and_Com1

Condensed Consolidated and Combined Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
		Predecessor [Member]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000
Common stock, shares issued	8,192,915	1,000
Common stock, shares outstanding	8,192,915	1,000

Condensed_Consolidated_and_Com2

Condensed Consolidated and Combined Statements of Operations (USD $)	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013
			Predecessor [Member]	Predecessor [Member]
Revenues:	'	'	'	'
Rental income	$7,714,275	$14,951,033	$3,819,689	$6,715,922
Expense reimbursement	502,772	952,814	398,259	686,495
Other	176,162	471,822	190,941	390,734
Total Revenues	8,393,209	16,375,669	4,408,889	7,793,151
Operating Expenses:	'	'	'	'
Property operating expenses	2,267,612	4,522,074	1,232,834	2,185,669
Insurance	169,568	322,426	119,481	230,598
Property taxes	561,208	1,022,312	250,168	556,553
Property management fees	186,162	393,779	131,315	253,534
Acquisition costs	343,803	1,150,147	1,479,292	1,479,292
Base management fee	185,176	185,176	'	'
Stock based compensation	285,142	285,142	'	'
General and administrative	364,303	414,303	'	'
Depreciation and amortization	3,415,807	6,575,784	1,591,389	2,715,369
Total Operating Expenses	7,778,781	14,871,143	4,804,479	7,421,015
Operating income/(loss)	614,428	1,504,526	-395,590	372,136
Interest Expense:	'	'	'	'
Contractual interest expense	-1,785,288	-3,954,535	-1,030,906	-1,836,433
Amortization of deferred financing costs	-136,879	-1,129,046	-67,197	-205,443
Loss on early extinguishment of Predecessor debt	-1,654,826	-1,654,826	'	'
Interest expense, net	-3,576,993	-6,738,407	-1,098,103	-2,041,876
Change in fair value of earn-out	-104,865	-104,865	'	'
Gain on equity investment	'	4,474,644	'	'
Equity in income of unconsolidated entity	'	'	71,311	170,648
Net loss	-3,067,430	-864,102	-1,422,382	-1,499,092
Less: Net loss attributable to noncontrolling interests in properties	69,044	78,970	25,269	38,988
Less: Net loss/(income) attributable to Predecessor	240,057	-1,973,197	1,397,113	1,460,104
Less: Net loss attributable to Operating Partnership unitholders' noncontrolling interests	814,127	814,127	'	'
Net loss attributable to Stockholders	($1,944,202)	($1,944,202)	'	'
Net loss per share:	'	'	'	'
Basic and diluted	($0.24)	($0.24)	'	'
Weighted average common shares outstanding:	'	'	'	'
Basic and diluted	8,057,521	8,057,521	'	'
Dividends/distributions declared per common share and unit	$0.18	$0.18	'	'

Condensed_Consolidated_and_Com3

Condensed Consolidated and Combined Statements of Changes in Equity (USD $)	Total	Predecessor [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interests in Properties [Member]	Operating Partnership Unitholders' Noncontrolling Interests [Member]
						Predecessor [Member]
Beginning balance at Dec. 31, 2013	$27,708,115	$26,624,375	'	'	'	$26,624,375	$1,083,740	'
Contributions	3,905,445	3,843,445	'	'	'	3,843,445	62,000	'
Distributions	-1,500,000	-1,347,000	'	'	'	-1,347,000	-153,000	'
Net income/(loss)	1,944,487	1,973,197	'	'	'	1,973,197	-28,710	'
Ending balance at Apr. 20, 2014	32,058,047	31,094,017	'	'	'	31,094,017	964,030	'
Beginning balance at Mar. 31, 2014	'	'	'	'	'	'	'	'
Net income/(loss)	'	-258,842	'	'	'	'	'	'
Ending balance at Apr. 20, 2014	32,058,047	31,094,017	'	'	'	31,094,017	964,030	'
Net proceeds from sale of common shares, values	72,470,465	'	65,831	72,404,634	'	72,470,465	'	'
Net proceeds from sale of common shares	'	'	6,582,150	'	'	'	'	'
Formation Transactions	-42,049,949	-31,094,017	16,108	-26,998,012	'	-58,075,921	-1,658,141	17,684,113
Formation Transactions, shares	'	'	1,610,765	'	'	'	'	'
Restricted stock award grants	-285,142	'	'	-285,142	'	-285,142	'	'
Dividends declared	-2,094,400	'	'	'	-1,499,302	-1,499,302	'	-595,098
Net income/(loss)	-2,808,589	'	'	'	-1,944,202	-1,944,202	-50,260	-814,127
Ending balance at Jun. 30, 2014	$57,290,432	'	$81,939	$45,121,480	($3,443,504)	$41,759,915	($744,371)	$16,274,888
Ending balance, shares at Jun. 30, 2014	'	'	8,192,915	'	'	'	'	'

Condensed_Consolidated_and_Com4

Condensed Consolidated and Combined Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
		Predecessor [Member]
Cash Flows from Operating Activities:	'	'
Net loss	($864,102)	($1,499,092)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'
Depreciation and amortization	6,575,784	2,715,369
Amortization of deferred financing costs	1,970,837	205,443
Amortization of above/below market leases	243,569	214,584
Increase in straight-line rent	-834,229	-865,674
Non-cash stock compensation	285,142	'
Change in fair value of earn-out	104,865	'
Gain on equity investment	-4,474,644	'
Equity in income of unconsolidated entity	'	-170,648
Changes in non-cash working capital:	'	'
Rents receivable, net	-773,075	-272,718
Prepaid expenses and other assets	-2,090,373	226,269
Accounts payable and accrued liabilities	3,290,364	432,779
Deferred rent	-1,049,848	-43,502
Tenant rent deposits	499,554	544,489
Net Cash Provided By (Used In) Operating Activities	2,883,844	1,487,299
Cash Flows to Investing Activities:	'	'
Additions to real estate properties	-1,967,153	-1,348,691
Acquisition of real estate, net of cash assumed	-37,171,675	-71,313,835
Distribution from unconsolidated entity	'	358,766
Deferred leasing cost	-434,854	-569,224
Net Cash Used In Investing Activities	-39,573,682	-72,872,984
Cash Flows from Financing Activities:	'	'
Net proceeds from issuance of common shares	72,470,455	'
Formation Transactions	-35,244,570	'
Debt issuance cost	-3,537,811	-522,077
Proceeds from mortgage loans payable	170,400,000	66,294,637
Repayment of mortgage loans payable	-161,313,968	-10,216,667
Contributions from partners and members	3,843,445	21,471,665
Contributions from noncontrolling interests	62,000	1,305,464
Distributions to partners and members	-1,347,000	-911,266
Distributions to noncontrolling interests	-153,000	-97,500
Change in restricted cash	-5,441,540	-6,296,858
Net Cash Provided By Financing Activities	39,738,011	71,027,398
Net Increase (Decrease) in Cash and Cash Equivalents	3,048,173	-358,287
Cash and Cash Equivalents, Beginning of Period	7,127,764	3,106,616
Cash and Cash Equivalents, End of Period	10,175,937	2,748,329
Supplemental Disclosures of Cash Flow Information:	'	'
Cash paid for interest	4,605,306	1,829,298
Accrued dividends payable	$2,094,400	'

Organization_and_Description_o

Organization and Description of Business	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Organization and Description of Business	'
	1. Organization and Description of Business
	City Office REIT, Inc. (the “Company”) was organized in the state of Maryland on November 26, 2013. On April 21, 2014, the Company completed its initial public offering (“IPO”) of shares of the Company’s common stock. The Company contributed the net proceeds of the IPO to City Office REIT Operating Partnership, L.P., a Maryland limited partnership (the “Operating Partnership”), in exchange for common units in the Operating Partnership. Both the Company and the Operating Partnership commenced operations upon completion of the IPO and certain related formation transactions (the “Formation Transactions”).
	The Company’s interest in the Operating Partnership entitles the Company to share in distributions from, and allocations of profits and losses of, the Operating Partnership in proportion to the Company’s percentage ownership of common units. As the sole general partner of the Operating Partnership, the Company has the exclusive power under the partnership agreement to manage and conduct the Operating Partnership’s business, subject to limited approval and voting rights of the limited partners.
	City Office REIT, Inc. Predecessor (the “Predecessor”) represents the combination of the six properties outlined below (the “Properties”). The Predecessor does not represent a legal entity. The Predecessor and its related assets and liabilities are under common control and were contributed to a newly formed Operating Partnership in connection with the “IPO” of the Company on April 21, 2014.
	The historical financial results in these financial statements for periods prior to April 21, 2014 relate to the Predecessor. The Predecessor is comprised of the following properties:
		•		City Center: Property in St. Petersburg, Florida, acquired in December 2010.
		•		Central Fairwinds: Property in Orlando, Florida, acquired in May 2012.
		•		AmberGlen: Property in Portland, Oregon, acquired in December 2009.
		•		Washington Group Plaza: Property in downtown Boise, Idaho, acquired in June 2013.
		•		Corporate Parkway: Property in Allentown, Pennsylvania, acquired in May 2013.
		•		Cherry Creek: Property in Denver, Colorado, acquired in January 2014.
	The Company intends to elect to be taxed and to operate in a manner that will allow it to qualify as a real estate investment trust (“REIT”) commencing with its taxable year ending December 31, 2014. Subject to qualification as a REIT, the Company will be permitted to deduct distributions paid to its stockholders, eliminating the U.S. federal taxation of income represented by such distributions at the Company level. REITs are subject to a number of organizational and operational requirements. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to U.S. federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.
	Pursuant to the Jumpstart Our Business Startups Act (the “JOBS Act”), the Company qualifies as an emerging growth company (“EGC”). An EGC may choose to take advantage of the extended private company transition period provided for complying with new or revised accounting standards that may be issued by the Financial Accounting Standards Board (“FASB”) or the Securities and Exchange Commission (the “SEC”). The Company has elected to opt out of such extended transition period. This election is irrevocable.
	Initial Public Offering and Formation Transactions
	The Company’s operations will be carried on primarily through the Operating Partnership and wholly owned subsidiaries of the Operating Partnership. Both the Company and the Operating Partnership commenced operations upon completion of the IPO and certain related formation transactions (the “Formation Transactions”).
	On April 21, 2014, the Company closed the IPO, pursuant to which it sold 5,800,000 shares of common stock to the public at a public offering price of $12.50 per share. The Company raised $72.5 million in gross proceeds, resulting in net proceeds to us of approximately $63.4 million after deducting approximately $5.1 million in underwriting discounts and approximately $4.0 million in other expenses relating to the IPO. On May 9, 2014, the underwriters of the IPO exercised their overallotment option to purchase an additional 782,150 shares of the Company’s common stock at the IPO price of $12.50 a share resulting in additional gross proceeds of approximately $9.8 million. The net proceeds to the Company were $9.1 million after deducting approximately $0.7 million in underwriting discounts. The Company’s common stock began trading on the New York Stock Exchange under the symbol “CIO” on April 15, 2014.
	The Company contributed the net proceeds of the IPO to the Operating Partnership in exchange for common units in the Operating Partnership. The Operating Partnership utilized a portion of the net proceeds of the IPO to pay fees in connection with the assumption of the indebtedness, pay expenses incurred in connection with the IPO and Formation Transactions and repay loans that were made to several of the contributing entities by certain investors in such entities. The remaining funds are expected to be used for general working capital purposes and to fund potential future acquisitions.
	Pursuant to the Formation Transactions and exercise of the underwriters’ overallotment option, the Operating Partnership acquired a 100% interest in each of the Washington Group Plaza, Cherry Creek and Corporate Parkway properties and acquired an approximate 76% economic interest in the AmberGlen property, 90% interest in the Central Fairwinds property and 95% interest in the City Center property. These initial property interests were contributed in exchange for 3,731,209 common units, 1,610,765 common stock and $19.4 million of cash. On May 9, 2014, subsequent to the exercise of the underwriters’ overallotment option, 479,305 common units and 248,095 common stock were redeemed for $9.1 million in cash.
	In connection with the IPO and Formation Transactions, the Company, through its Operating Partnership, extinguished the loan on the Central Fairwinds property and completed a refinancing of three properties (Cherry Creek, City Center and Corporate Parkway) with a new $95 million non-recourse mortgage loan and proceeds from the IPO. The loan bears a fixed interest rate of 4.34% and matures on May 6, 2021.
	The following is a summary of the Predecessor Statement of Operations for the period from April 1, 2014 through April 20, 2014 and for the period from January 1, 2014 through April 20, 2014, and the Company’s Statement of Operations for the period from April 21, 2014 through June 30, 2014. These amounts are included in the condensed consolidated and combined statement of operations herein for the three and six months ended June 30, 2014. All balances as of December 31, 2013 and for the three and six months ended June 30, 2013 are those of the Predecessor.
			Predecessor						City Office REIT, Inc.
			April 1, 2014 through			January 1, 2014 through			April 21, 2014 through
			April 20, 2014			April 20, 2014			June 30, 2014
	Revenues:
	Rental income		$	1,628,480		$	8,865,238		$	6,085,796
	Expense reimbursement			105,569			555,611			397,203
	Other			47,198			342,859			128,963
	Total Revenues			1,781,247			9,763,708			6,611,962
	Operating Expenses:
	Property operating expenses			510,431			2,764,893			1,757,182
	Insurance			23,570			176,428			145,998
	Property taxes			136,684			597,788			424,524
	Property management fees			27,265			234,882			158,896
	Acquisition costs			—			806,344			343,803
	Base management fees			—			—			185,176
	Stock based compensation			—			—			285,142
	General and administrative			29,799			79,799			334,504
	Depreciation and amortization			701,962			3,861,939			2,713,845
	Total Operating Expenses			1,429,711			8,522,073			6,349,070
	Operating income			351,536			1,241,635			262,892
	Interest expense, net			(610,378	)		(3,771,792	)		(2,966,616	)
	Change in fair value of earn-out			—			—			(104,865	)
	Gain on equity investment			—			4,474,644			—
	Net (Loss)/Income			(258,842	)		1,944,487			(2,808,589	)
	Net Loss attributable to noncontrolling interests in properties			18,785			28,710			50,260
	Net (Loss)/Income attributable to Predecessor			(240,057	)		1,973,197			—
	Net loss attributable to Operating Partnership noncontrolling interests									814,127
	Net loss attributable to Stockholders									(1,944,202	)

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2. Summary of Significant Accounting Policies
	Basis of Preparation and Summary of Significant Accounting Policies
	The accompanying consolidated and combined financial statements were prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and include the financial position and results of operations of the Company, the Operating Partnership and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.
	The Predecessor represents a combination of certain entities holding interests in real estate that were commonly controlled prior to the Formation Transactions. Due to their common control, the financial statements of the separate entities which own the properties are presented on a combined basis. The accompanying condensed combined financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). All significant intercompany balances and transactions have been eliminated on combination.
	The information furnished in the accompanying condensed consolidated and combined financial statements reflects all adjustments that, in the opinion of management, are necessary for a fair presentation of the aforementioned condensed consolidated and combined financial statements for the interim periods. Operating results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. These interim financial statements should be read in conjunction with, and follow the same policies and procedures as outlined in the audited combined financial statements of the Predecessor for the year ended December 31, 2013, included in the Company’s final prospectus dated April 14, 2014.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the combined financial statements and the reported amounts of revenues and expenses during the period. Such estimates are based on management’s best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from management’s estimates.
	Offering Costs
	Costs related to the IPO and Formation Transactions paid by the Company’s Predecessor were reimbursed from the proceeds of the IPO.
	Income Taxes
	The Company intends to elect to be taxed and to operate in a manner that will allow it to qualify as a real estate investment trust (“REIT”) under the U.S. Internal Revenue Code (the “Code”) commencing with its taxable year ending December 31, 2014. To qualify as a REIT, the Company is required to distribute dividends equal to at least 90% of the REIT taxable income (computed without regards to the dividends paid deduction and net capital gains) to its stockholders, and meet the various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided the Company qualifies for taxation as a REIT, it is generally not subject to U.S. federal corporate-level income tax on the earnings distributed currently to its stockholders. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to U.S. federal and state income tax on its taxable income at regular corporate tax rates and any applicable alternative minimum tax. In addition, the Company may not be able to re-elect as a REIT for the four subsequent taxable years.
	For periods prior to the completion of the IPO and the Formation Transactions on April 21, 2014, no provision was made for U.S. federal, state or local income taxes because profits and losses of the Predecessor flowed through to its respective partners, members and shareholders who were individually responsible for reporting such amounts.
	For periods subsequent to the completion of the IPO and the Formation Transactions, the taxable REIT subsidiaries (“TRS”) are subject to federal, state and local corporate income taxes to the extent there is taxable income.
	Noncontrolling Interests
	Upon completion of the IPO and Formation Transactions and exercise of the underwriters’ overallotment option, the Operating Partnership issued 3,251,904 common units of limited partnership interest to the Predecessor’s prior investors as partial consideration for the contribution of their interest in the Predecessor to the Operating Partnership. Noncontrolling interest in the Company represents common units of the Operating Partnership held by the Predecessor’s prior investors.
	As of June 30, 2014, the Company held a 71.6% interest in the Operating Partnership. As the sole general partner and the majority interest holder, the Company consolidates the financial position and results of operations of the Operating Partnership.
	Dividends
	On May 12, 2014, the Company’s board of directors declared an initial, prorated cash dividend of $0.183 per share for the quarterly period from April 21, 2014 through June 30, 2014, which is equivalent to a full quarterly dividend of $0.235. The dividend was payable on July 17, 2014 to stockholders and common unitholders of record on July 3, 2014. The $1.5 million in dividends to stockholders and $0.6 million to common unitholders, totaling $2.1 million.
	Equity Based Compensation
	The Company accounts for equity-based compensation, including shares of restricted stock units, in accordance with ASC Topic 718 Compensation – Stock Compensation, which requires the Company to recognize an expense for the fair value of equity-based awards. The estimated fair value of restricted stock units is amortized over their respective vesting periods. See note 11 for further details.
	Earnings per Share
	The Company calculates net income per share based upon the weighted average shares outstanding during the period beginning April 21, 2014. Diluted earnings per share is calculated after giving effect to all potential dilutive shares outstanding during the period. There were 3,251,904 potentially dilutive shares outstanding related to the issuance of common units held by noncontrolling interests during the three and six months ended June 30, 2014. However, the shares were excluded from the computation of diluted shares as their impact would have been anti-dilutive. As a result, the number of diluted outstanding shares was treated equal to the number of outstanding shares.

Real_Estate_Investments

Real Estate Investments	6 Months Ended
	Jun. 30, 2014
Real Estate [Abstract]	'
Real Estate Investments	'
	3. Real Estate Investments
	Acquisitions
	During the three months and six months ended June 30, 2014, the Company acquired the following properties:
	Property	Date		Percentage
		Acquired		Owned
	Cherry Creek	January 2014			100	%
	Plaza 25	Jun-14			100	%
	The above acquisitions have been accounted for as business combinations.
	On January 2, 2014, the Predecessor acquired the remaining 57.7% interest it did not already own in ROC-SCCP Cherry Creek I, LP (“Cherry Creek”) for approximately $12.0 million. The acquisition was financed through a new $50 million mortgage loan, the proceeds of which were used to repay $36 million of existing debt of Cherry Creek, fund the payment of $12.0 million to the seller, pay $1.2 million of deferred financing costs and $0.8 million in transactions costs.
	The following table summarizes the Company’s preliminary allocation of the purchase price of assets acquired and liabilities assumed during the three and six months ended June 30, 2014:
		Cherry Creek
	Land	$	25,745,012
	Building and improvements		15,771,277
	Tenant Improvements		4,372,849
	Acquired intangible assets		12,009,085
	Accounts payable and accrued liabilities		(815,378	)
	Lease intangible liability		(249,409	)
	Fair value of assets and liabilities at acquisition	$	56,833,436
	The Company recognized expenses relating to the Cherry Creek acquisition of $806,344 for the three and six months ended June 30, 2014. A gain of $4.5 million was recognized from the fair value adjustment associated with the Predecessor’s original ownership due to a change in control, calculated as follows:
	Fair value of assets and liabilities acquired	$	56,833,436
	Less existing mortgage in Cherry Creek		(36,000,000	)
			20,833,436
	Less cash paid to seller		(12,020,893	)
	Fair value of 42.3% equity interest		8,812,543
	Carrying value of investment in Cherry Creek		(4,337,899	)
	Gain on existing 42.3% equity interest	$	4,474,644
	On June 4, 2014, the Company, through its Operating Partnership acquired 100% of CIO Plaza 25 Limited Partnership, a property in Denver, Colorado for $25.1 million. The following table summarizes the Company’s preliminary allocation of the purchase price of assets acquired and liabilities assumed during the three and six months ended June 30, 2014:
		Plaza 25
	Land	$	1,764,235
	Building and improvements		18,486,580
	Tenant Improvements		2,075,932
	Acquired intangible assets		2,923,754
	Accounts payable and accrued liabilities		228,187
	Lease intangible liability		(327,906	)
	Total consideration	$	25,150,782
	The operating results of the acquired properties, during the three and six months ended June 30, 2014, since the date of acquisition have been included in the Company’s consolidated and combined financial statements. The following table represents the results of the property’s operations since the date of acquisition on a stand-alone basis.
		Three months ended				Six months ended
		June 30, 2014				June 30, 2014
	Operating revenues	$	2,012,971			$	3,724,473
	Operating expenses		(1,672,109	)			(3,704,122	)
	Interest		(867,153	)			(2,370,974	)
	Net loss before gain on equity investment	$	(526,291	)		$	(2,350,623	)
	The following table presents the unaudited revenues and income from continuing operations for Cherry Creek and Plaza 25 on a pro forma basis as if the Predecessor had completed the acquisition of the properties as of January 1, 2013:
		Six months ended				Six months ended
		June 30, 2014				June 30, 2013
	Total revenues as reported by City Office REIT, Inc. and Predecessor	$	16,375,669			$	7,793,151
	Plus: Cherry Creek		—				3,258,954
	Plaza 25		1,613,864				1,594,830
	Proforma total revenues	$	17,989,533			$	12,646,935
	Total operating income as reported by the City Office REIT, Inc. and Predecessor	$	1,504,526			$	372,136
	Property acquisition costs		(855,201	)			(855,201	)
	Plus: Cherry Creek		—				926,862
	Plaza 25		648,160				594,175
	Proforma operating income	$	1,297,485			$	1,037,972

Lease_Intangibles

Lease Intangibles	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Lease Intangibles	'
	4. Lease Intangibles
	Lease intangibles and the value of assumed lease obligations as of June 30, 2014 and December 31, 2013 were comprised as follows:
	June 30, 2014	Above Market			In Place			Leasing			Total			Below Market			Below Market			Total
		Leases			Leases			Commissions						Leases			Ground Lease
	Cost	$	6,738,058		$	19,896,523		$	11,578,532		$	38,213,113		$	(746,219	)	$	(138,218	)	$	(884,437	)
	Accumulated amortization		(2,711,000	)		(7,575,794	)		(2,644,771	)		(12,931,565	)		174,138			18,214			192,352
		$	4,027,058		$	12,320,729		$	8,933,761		$	25,281,548		$	(572,081	)	$	(120,004	)	$	(692,085	)
	December 31, 2013	Above Market			In Place			Leasing			Total			Below Market			Below Market			Total
		Leases			Leases			Commissions						Leases			Ground Lease
	Cost	$	3,043,030		$	14,885,115		$	5,447,198		$	23,375,343		$	(168,904	)	$	(138,218	)	$	(307,122	)
	Accumulated Amortization		(1,306,326	)		(6,536,311	)		(1,781,143	)		(9,623,780	)		123,567			16,209			139,776
		$	1,736,704		$	8,348,804		$	3,666,055		$	13,751,563		$	(45,337	)	$	(122,009	)	$	(167,346	)
	The Company has adjusted acquired lease intangibles and accounts payable and accrued liabilities as of December 31, 2013 in the amount of $649,192 to conform with the current period presentation as of June 30, 2014. There was no impact to net income resulting from this adjustment.
	The estimated aggregate amortization expense for lease intangibles for the five succeeding years and in the aggregate are as follows:
	2014	$	3,025,920
	2015		6,289,564
	2016		5,475,934
	2017		2,932,560
	2018		1,721,733
	Thereafter		5,143,752
		$	24,589,463

Debt

Debt	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	5. Debt
	The following table summarizes the secured indebtedness as of June 30, 2014 and December 31, 2013:
	Property		June 30,		December 31,		Interest			Maturity
			2014		2013		Rate as of
							30-Jun-14
	Revolving Credit Facility (1)		$	—	$	—		LIBOR +2.75	%(2)	Apr-16
	AmberGlen Mortgage Loan (3)			25,365,817		—		4.38	%	May-19
	Midland Life Insurance (4)			95,000,000		—		4.34	%	May-21
	Washington Group Plaza (5)			34,636,645		34,949,159		3.85	%	Jul-18
	City Center (6)			—		22,333,938		—		Jun-14
	Central Fairwinds (7)			—		10,000,000		—		October 2015
	Corporate Parkway (7)			—		19,133,333		—		Apr-16
	AmberGlen (8)			—		23,500,000		—		Jul-17
	Total		$	155,002,462	$	109,916,430
	All interest rates are fixed interest rates with the exception of the revolving credit facility as explained in footnote 1 below.
	(1)	The Revolving Credit Facility currently has $30 million authorized with $26.4 million available immediately. In addition, the Revolving Credit Facility has an accordion feature that will permit us to borrow up to $150 million, subject to additional collateral availability and lender approval. The revolving credit facility bears an interest rate of LIBOR plus 2.75% and requires the company to maintain a fixed charge coverage ratio of no less than 1.60x.
	(2)	As of June 30, 2014, the 3 Month LIBOR rate was 0.27%.
	(3)	Following the Formation Transactions, on April 29, 2014, we entered into a new mortgage loan in relation to the AmberGlen property for $25.4 million. The loan bears an interest rate of 4.38% and matures on May 1, 2019. The Company is required to maintain a minimum net worth of $25 million and a minimum liquidity of $2 million.
	(4)	The loan is cross-collateralized by Corporate Parkway, Cherry Creek and City Center. Interest only until February 2016 then interest payable monthly plus principal based on 360 months of amortization. The loan bears a fixed interest rate of 4.34% and matures on May 6, 2021.
	(5)	Interest payable monthly plus principal based on 360 months of amortization.
	-6	Interest payable monthly plus monthly principal payment of $20,000. This loan was extinguished on April 21, 2014 in relation to the Formation Transaction.
	(7)	Interest only payable monthly, principal due on maturity. This loan was extinguished on April 21, 2014 in relation to the Formation Transactions.
	-8	This Amberglen loan was refinanced on April 29, 2014 with the new Amberglen Loan discussed in footnote (3) above.
	On June 13, 2014, in connection with the addition of Plaza 25 as an additional collateral property, the Company, through its Operating Partnership, exercised a portion of the accordion feature of the Revolving Credit Facility and entered into an amendment to the credit agreement, thereby increasing the aggregate principal maximum amount available for borrowing under the Revolving Credit Facility to $30 million.
	The scheduled principal repayments of mortgage payable as of June 30, 2014 are as follows:
	2014		$	516,623
	2015			1,065,209
	2016			2,020,590
	2017			2,772,027
	2018			34,522,392
	Thereafter			114,105,621
			$	155,002,462

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2014

Investments All Other Investments [Abstract]

'

Fair Value of Financial Instruments

'

6. Fair Value of Financial Instruments

Fair value measurements are based on assumptions that market participants would use in pricing an asset or a liability. The hierarchy for inputs used in measuring fair value is as follows:

Level 1 Inputs – quoted prices in active markets for identical assets or liabilities

Level 2 Inputs – observable inputs other than quoted prices in active markets for identical assets and liabilities

Level 3 Inputs – unobservable inputs

Financial assets whose fair values are measured on a recurring basis consist only of an interest rate swap. The fair value of the interest rate swap is calculated based on Level 2 inputs.

As of June 30, 2014, the Company did not have any hedges or derivatives. As of December 31, 2013, the Predecessor had not designated its interest rate swap as a hedge. This derivative was not speculative and was used to manage the Predecessor’s exposure to interest rate movements and other identified risks, but the Predecessor elected not to designate these instruments in hedging relationships based on the provisions in ASC 815-10. The changes in fair value of derivatives not designated in hedging relationships have been recognized in earnings. Summarized below is the interest rate derivative that was not designated as a cash flow hedge and the fair value of all derivative assets and liabilities as of December 31, 2013. The interest rate swap was subsequently terminated upon completion of the IPO.

Type of

Notional

Maturity

Fair Value as of

Property

Instrument

amount

date

Effective rate

December 31, 2013

City Center

Interest Rate Swap

$

15,000,000

—

6

%

$

—

The Fair value of the earn-out was derived by making assumptions on the timing of the lease up of vacant space and the net effective rents of those new leases and then applying an 8% discount rate to the resulting cash-flows to obtain a present value. The earn-out valuation assumes that approximately 40,000 square feet of additional leasing is completed between the date of the valuation and the end of the calculation period which would take the existing occupancy from 67% at June 30, 2014 to 85% by October 2016 and stabilized at that level thereafter. The average net effective rent and incremental operating costs per square foot is assumed to be $14 and $4 respectively.

Level 3 sensitivity analysis:

The Company applies judgment in determining unobservable inputs used to calculate the fair value of Level 3 instruments. Level 3 instruments held by the Company include the earn-out. The unobservable inputs used in the valuation of the earn-out primarily include the net effective rent assumptions. A sensitivity analysis has been performed to determine the potential gain or loss by varying the significant unobservable inputs by increasing or decreasing them by 10%. The impact of applying these other reasonably possible inputs is a potential loss of $0.4 million and a potential gain of $0.4 million. This potential gain or loss would be recorded through profit and loss.

Fair Values of Financial Instruments Not Carried at Fair Value

With the exception of fixed rate mortgage loans payable, the carrying amounts of the Predecessor’s financial instruments approximate their fair value. The Predecessor determines the fair value of its fixed rate mortgage loan payable based on a discounted cash flow analysis using a discount rate that approximates the current borrowing rates for instruments of similar maturities. Based on this, the Company has determined that the fair value of these instruments was $155,000,000 and $88,500,000 as of June 30, 2014 and December 31, 2013, respectively. Although the Predecessor has determined that the majority of the inputs used to value its fixed rate debt fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its fixed rate debt utilize Level 3 inputs, such as estimates of current credit spreads. Accordingly, mortgage loans payable have been classified as Level 3 fair value measurements.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	7. Related Party Transactions
	Formation Transactions
	The formation transactions were completed on April 21, 2014 through the contribution of the initial properties by Second City Capital Partners II, Limited Partnership, Second City General Partner II, Limited Partnership, Gibralt US, Inc., GCC Amberglen Investments Limited Partnership and Daniel Rapaport (collectively the “Second City Group”). The Second City Group received as consideration for its contribution approximately $19.4 million in cash in accordance with the terms of its contribution agreement to acquire various noncontrolling interests and eliminate economic incentives in the initial properties. Additional payments to the Second City Group included $4.9 million for reimbursement of IPO costs and $1.8 million for working capital. On May 9, 2014, subsequent to the underwriters’ exercise of the overallotment option, net proceeds of $9.1 million was paid to the Second City Group to redeem 479,305 common units and 248,095 common stock.
	Property Management Fees
	Three of the properties (City Center, Central Fairwinds and AmberGlen) engaged related parties to perform asset and property management services for a fee ranging from 1.75% to 3.5% of gross revenue.
	Prior to the Formation Transactions, the property manager of Washington Group Plaza was also entitled to an additional incentive commission equal to the lesser of (a) 15% of net operating income in excess of $5 million in 2013, $5.45 million in 2014 and $5.6 million in 2015; or (b) 1% of all monthly gross revenue. The asset and management agreement has an initial term of three years and will automatically renew for successive two year periods. This agreement can be terminated by the Company or the property manager upon thirty days prior written notice to the other party.
	Deferred Offering and Financing Costs
	Deferred offering and financing costs directly associated with the IPO and Formation Transactions of $4.9 million were reimbursed to Second City upon the closing of the IPO.

Future_Minimum_Rent_Schedule

Future Minimum Rent Schedule	6 Months Ended
	Jun. 30, 2014
Leases [Abstract]	'
Future Minimum Rent Schedule	'
	8. Future Minimum Rent Schedule
	Future minimum lease payments to be received as of June 30, 2014 under noncancellable operating leases for the next five years and thereafter are as follows:
	2014	$	15,992,612
	2015		32,611,575
	2016		25,801,105
	2017		17,645,841
	2018		13,975,673
	Thereafter		57,764,006
		$	163,790,812
	The above minimum lease payments to be received do not include reimbursements from tenants for certain operating expenses and real estate taxes and do not include early termination payments provided for in certain leases.
	Two state government tenants currently have the exercisable right to terminate their lease if the state does not appropriate rent in its annual budgets. The Company has determined that the occurrence of the government tenant not appropriating the rent in its annual budget is a remote contingency and accordingly recognizes lease revenue on a straight-line basis over the respective lease term. These tenants represent approximately 47.4% of the Company’s total future minimum lease payments as of June 30, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	9. Commitments and Contingencies
	Earn-Out
	As part of the Formation Transactions and contribution agreement with respect to the Central Fairwinds property (which is currently approximately 72.1% leased, including committed tenants), the Company is obligated to make additional payments to Second City (each, an “Earn-Out Payment”). Earn-Out Payments are contingent on the property reaching certain specified occupancy levels through new leases to qualified tenants and exceeding a net operating income threshold, which grows annually. Second City will be entitled to receive an Earn-Out Payment (net of the associated leasing costs and inclusive of leasing commissions and tenant improvements/allowances and free rent) as and when the occupancy of Central Fairwinds reaches each of 70%, 80% and 90% (each, an “Earn-Out Threshold”) based on the incremental cash flow generated by new leases and a 7.75% stabilized capitalization rate. The Company will make any additional Earn-Out Payment within 30 days of the end of the Earn-Out Term based on new qualified leases entered into since the achievement of the last Earn-Out Threshold. Earn-Out Payments will be subject to a claw-back if a qualified tenant defaults in the payment of rent and is not replaced with another qualified tenant.
	As of June 30, 2014, the estimated fair value of the earn-out liability is $7.1 million. The change in fair value for the for the period from April 21, 2014 to June 30, 2014 was $0.1 million.
	Property Management Fees
	Prior to the Formation Transactions, Washington Group Plaza engaged a related party to perform asset and management services for base and incentive fees as discussed in Note 7.
	Other
	The Company is obligated under certain tenant leases to fund tenant improvements and the expansion of the underlying leased properties.
	Under various federal, state and local laws, ordinances and regulations relating to the protection of the environment, a current or previous owner or operator of real estate may be liable for the cost of removal or remediation of certain hazardous or toxic substances disposed, stored, generated, released, manufactured or discharged from, on, at, under, or in a property. As such, the Company may be potentially liable for costs associated with any potential environmental remediation at any of its formerly or currently owned properties.
	The Company believes that it is in compliance in all material respects with all federal, state and local ordinances and regulations regarding hazardous or toxic substances. Management is not aware of any environmental liability that it believes would have a material adverse impact on the Company’s financial position or results of operations. Management is unaware of any instances in which the Company would incur significant environmental costs if any or all properties were sold, disposed of or abandoned. However, there can be no assurance that any such non-compliance, liability, claim or expenditure will not arise in the future.
	The Company is involved from time to time in lawsuits and other disputes which arise in the ordinary course of business. As of June 30, 2014 management believes that these matters will not have a material adverse effect, individually or in the aggregate, on the Company’s financial position or results of operations.

Earnings_per_Share

Earnings per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings per Share	'
	10. Earnings per Share
	The following table shows the amounts used in computing the Company’s basic and diluted earnings per share. As of the three and six months ended June 30, 2014, there is no dilution to earnings per share.
		Three Months Ended			Six Months Ended
		June 30, 2014			June 30, 2014
	Numerator for earnings per share – basic and diluted
	Net loss	$	(3,067,430	)	$	(864,102	)
	Less: Net loss attributable to noncontrolling interests in properties		69,044			78,970
	Less: Net loss attributable to Predecessor		240,057			(1,973,197	)
	Less: Net loss attributable to Operating Partnership unitholders’ noncontrolling interests		814,127			814,127
	Numerator for earnings per share – basic and diluted	$	1,944,202		$	1,944,202
	Denominator for earnings per share – basic and diluted		8,057,521			8,057,521
	Basic and diluted earnings per share	$	(0.24	)	$	(0.24	)

Stockholders_Equity

Stockholder's Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Stockholder's Equity	'
	11. Stockholder’s Equity
	The Company issued 5,800,000 shares in conjunction with the IPO resulting in net proceeds of $63.4 million after deducting the underwriters’ discount and offering expenses. The underwriters of the IPO exercised their overallotment option to purchase an additional 782,150 shares of the Company’s common stock resulting in additional net proceeds to us of $9.1 million after deducting underwriting discounts.
	Noncontrolling Interests
	Noncontrolling interest in the Company represent common units of the Operating Partnership held by the Predecessor’s prior investors. Noncontrolling interests consisted of 3,251,904 Operating Partnership units and represented approximately 28.4% of the Operating Partnership as of June 30, 2014. Operating Partnership units and shares of common stock have essentially the same economic characteristics, as they share equally in the total net income or loss distributions of the Operating Partnership. Beginning on or after the date which is 12 months after the later of the completion of this offering or the date on which a person first became a holder of common units, each limited partner and assignees of limited partners will have the right, subject to the terms and conditions set forth in the partnership agreement, to require the Operating Partnership to redeem all or a portion of the common units held by such limited partner or assignee in exchange for a cash amount per common unit equal to the value of one share of common stock, determined in accordance with and subject to adjustment under the partnership agreement. The Company has the sole option at its discretion to redeem the common units by issuing common stock on a one-for-one basis. The Operating Partnership unitholders are entitled to share in cash distributions from the Operating Partnership in proportion to its percentage ownership of common units.
	Restricted Stock Units
	The Company has an equity incentive plan (“Equity Investment Plan”) for certain officers, directors, advisors and personnel, and, with approval of the board of directors, for subsidiaries, the Advisor and their respective affiliates. The Equity Incentive Plan provides for grants of restricted common stock, restricted stock units, phantom shares, stock options, dividend equivalent rights (“DERs”) and other equity-based awards (including LTIP Units), subject to the total number of shares available for issuance under the plan. The Equity Incentive Plan is administered by the compensation committee of the board of directors (the “plan administrator”).
	The maximum number of shares of common stock that may be issued under the Equity Incentive Plan is 1,263,580 shares. To the extent an award granted under the Equity Incentive Plan expires or terminates, the shares subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards.
	On April 21, 2014, 352,272 restricted stock units (“RSUs”) were granted to the Company’s executive officers and one of the directors at a grant date fair value of $12.50 totaling $4.4 million. The awards will vest in three equal, annual installments on each of the first three anniversaries of the date of grant. For the three and six months ended June 30, 2014, the Company recognized net compensation expense of $0.3 million related to the RSU’s.
	A restricted stock unit award represents the right to receive shares of the Company’s common stock in the future, after the applicable vesting criteria, determined by the plan administrator, has been satisfied. The holder of an award of restricted stock units has no rights as a stockholder until shares of common stock are issued in settlement of vested restricted stock units. The plan administrator may provide for a grant of dividend equivalent rights in connection with the grant of restricted stock units; provided, however, that if the restricted stock units do not vest solely upon satisfaction of continued employment or service, any payment in respect to the related dividend equivalent rights will be held by the Company and paid when, and only to the extent that, the related restricted stock units vest.

Subsequent_Events

Subsequent Events	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	12. Subsequent Events
	On July 18, 2014, the Company, through its Operating Partnership, acquired a property in Dallas, Texas for $28.4 million. The acquisition was financed with a combination of $9.9 million of cash and a draw from the revolving credit facility and an $18.5 million mortgage loan which bears a fixed interest rate of 4.28% and matures on August 6, 2024.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Summary of Significant Accounting Policies	'
	Basis of Preparation and Summary of Significant Accounting Policies
	The accompanying consolidated and combined financial statements were prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and include the financial position and results of operations of the Company, the Operating Partnership and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation.
	The Predecessor represents a combination of certain entities holding interests in real estate that were commonly controlled prior to the Formation Transactions. Due to their common control, the financial statements of the separate entities which own the properties are presented on a combined basis. The accompanying condensed combined financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). All significant intercompany balances and transactions have been eliminated on combination.
	The information furnished in the accompanying condensed consolidated and combined financial statements reflects all adjustments that, in the opinion of management, are necessary for a fair presentation of the aforementioned condensed consolidated and combined financial statements for the interim periods. Operating results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. These interim financial statements should be read in conjunction with, and follow the same policies and procedures as outlined in the audited combined financial statements of the Predecessor for the year ended December 31, 2013, included in the Company’s final prospectus dated April 14, 2014.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the combined financial statements and the reported amounts of revenues and expenses during the period. Such estimates are based on management’s best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from management’s estimates.
Offering Costs	'
	Offering Costs
	Costs related to the IPO and Formation Transactions paid by the Company’s Predecessor were reimbursed from the proceeds of the IPO.
Income Taxes	'
	Income Taxes
	The Company intends to elect to be taxed and to operate in a manner that will allow it to qualify as a real estate investment trust (“REIT”) under the U.S. Internal Revenue Code (the “Code”) commencing with its taxable year ending December 31, 2014. To qualify as a REIT, the Company is required to distribute dividends equal to at least 90% of the REIT taxable income (computed without regards to the dividends paid deduction and net capital gains) to its stockholders, and meet the various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided the Company qualifies for taxation as a REIT, it is generally not subject to U.S. federal corporate-level income tax on the earnings distributed currently to its stockholders. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to U.S. federal and state income tax on its taxable income at regular corporate tax rates and any applicable alternative minimum tax. In addition, the Company may not be able to re-elect as a REIT for the four subsequent taxable years.
	For periods prior to the completion of the IPO and the Formation Transactions on April 21, 2014, no provision was made for U.S. federal, state or local income taxes because profits and losses of the Predecessor flowed through to its respective partners, members and shareholders who were individually responsible for reporting such amounts.
	For periods subsequent to the completion of the IPO and the Formation Transactions, the taxable REIT subsidiaries (“TRS”) are subject to federal, state and local corporate income taxes to the extent there is taxable income.
Noncontrolling Interests	'
	Noncontrolling Interests
	Upon completion of the IPO and Formation Transactions and exercise of the underwriters’ overallotment option, the Operating Partnership issued 3,251,904 common units of limited partnership interest to the Predecessor’s prior investors as partial consideration for the contribution of their interest in the Predecessor to the Operating Partnership. Noncontrolling interest in the Company represents common units of the Operating Partnership held by the Predecessor’s prior investors.
	As of June 30, 2014, the Company held a 71.6% interest in the Operating Partnership. As the sole general partner and the majority interest holder, the Company consolidates the financial position and results of operations of the Operating Partnership.
Dividends	'
	Dividends
	On May 12, 2014, the Company’s board of directors declared an initial, prorated cash dividend of $0.183 per share for the quarterly period from April 21, 2014 through June 30, 2014, which is equivalent to a full quarterly dividend of $0.235. The dividend was payable on July 17, 2014 to stockholders and common unitholders of record on July 3, 2014. The $1.5 million in dividends to stockholders and $0.6 million to common unitholders, totaling $2.1 million.
Equity Based Compensation	'
	Equity Based Compensation
	The Company accounts for equity-based compensation, including shares of restricted stock units, in accordance with ASC Topic 718 Compensation – Stock Compensation, which requires the Company to recognize an expense for the fair value of equity-based awards. The estimated fair value of restricted stock units is amortized over their respective vesting periods. See note 11 for further details.
Earnings per Share	'
	Earnings per Share
	The Company calculates net income per share based upon the weighted average shares outstanding during the period beginning April 21, 2014. Diluted earnings per share is calculated after giving effect to all potential dilutive shares outstanding during the period. There were 3,251,904 potentially dilutive shares outstanding related to the issuance of common units held by noncontrolling interests during the three and six months ended June 30, 2014. However, the shares were excluded from the computation of diluted shares as their impact would have been anti-dilutive. As a result, the number of diluted outstanding shares was treated equal to the number of outstanding shares.

Organization_and_Description_o1

Organization and Description of Business (Tables)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Predecessor and Company's Statement of Operations	'
	The following is a summary of the Predecessor Statement of Operations for the period from April 1, 2014 through April 20, 2014 and for the period from January 1, 2014 through April 20, 2014, and the Company’s Statement of Operations for the period from April 21, 2014 through June 30, 2014. These amounts are included in the condensed consolidated and combined statement of operations herein for the three and six months ended June 30, 2014. All balances as of December 31, 2013 and for the three and six months ended June 30, 2013 are those of the Predecessor.
		Predecessor						City Office REIT, Inc.
		April 1, 2014 through			January 1, 2014 through			April 21, 2014 through
		April 20, 2014			April 20, 2014			June 30, 2014
	Revenues:
	Rental income	$	1,628,480		$	8,865,238		$	6,085,796
	Expense reimbursement		105,569			555,611			397,203
	Other		47,198			342,859			128,963
	Total Revenues		1,781,247			9,763,708			6,611,962
	Operating Expenses:
	Property operating expenses		510,431			2,764,893			1,757,182
	Insurance		23,570			176,428			145,998
	Property taxes		136,684			597,788			424,524
	Property management fees		27,265			234,882			158,896
	Acquisition costs		—			806,344			343,803
	Base management fees		—			—			185,176
	Stock based compensation		—			—			285,142
	General and administrative		29,799			79,799			334,504
	Depreciation and amortization		701,962			3,861,939			2,713,845
	Total Operating Expenses		1,429,711			8,522,073			6,349,070
	Operating income		351,536			1,241,635			262,892
	Interest expense, net		(610,378	)		(3,771,792	)		(2,966,616	)
	Change in fair value of earn-out		—			—			(104,865	)
	Gain on equity investment		—			4,474,644			—
	Net (Loss)/Income		(258,842	)		1,944,487			(2,808,589	)
	Net Loss attributable to noncontrolling interests in properties		18,785			28,710			50,260
	Net (Loss)/Income attributable to Predecessor		(240,057	)		1,973,197			—
	Net loss attributable to Operating Partnership noncontrolling interests								814,127
	Net loss attributable to Stockholders								(1,944,202	)

Real_Estate_Investments_Tables

Real Estate Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Schedule of Acquired Properties	'
	During the three months and six months ended June 30, 2014, the Company acquired the following properties:
	Property	Date		Percentage
		Acquired		Owned
	Cherry Creek	January 2014			100	%
	Plaza 25	Jun-14			100	%
Schedule of Realized Gain Loss on Investments	'
	The Company recognized expenses relating to the Cherry Creek acquisition of $806,344 for the three and six months ended June 30, 2014. A gain of $4.5 million was recognized from the fair value adjustment associated with the Predecessor’s original ownership due to a change in control, calculated as follows:
	Fair value of assets and liabilities acquired	$	56,833,436
	Less existing mortgage in Cherry Creek		(36,000,000	)
			20,833,436
	Less cash paid to seller		(12,020,893	)
	Fair value of 42.3% equity interest		8,812,543
	Carrying value of investment in Cherry Creek		(4,337,899	)
	Gain on existing 42.3% equity interest	$	4,474,644
Schedule of Operating Results Relating to Acquired Entities	'
	The following table represents the results of the property’s operations since the date of acquisition on a stand-alone basis.
		Three months ended				Six months ended
		June 30, 2014				June 30, 2014
	Operating revenues	$	2,012,971			$	3,724,473
	Operating expenses		(1,672,109	)			(3,704,122	)
	Interest		(867,153	)			(2,370,974	)
	Net loss before gain on equity investment	$	(526,291	)		$	(2,350,623	)
Schedule of Business Acquisition Pro Forma Results of Operations	'
	The following table presents the unaudited revenues and income from continuing operations for Cherry Creek and Plaza 25 on a pro forma basis as if the Predecessor had completed the acquisition of the properties as of January 1, 2013:
		Six months ended				Six months ended
		June 30, 2014				June 30, 2013
	Total revenues as reported by City Office REIT, Inc. and Predecessor	$	16,375,669			$	7,793,151
	Plus: Cherry Creek		—				3,258,954
	Plaza 25		1,613,864				1,594,830
	Proforma total revenues	$	17,989,533			$	12,646,935
	Total operating income as reported by the City Office REIT, Inc. and Predecessor	$	1,504,526			$	372,136
	Property acquisition costs		(855,201	)			(855,201	)
	Plus: Cherry Creek		—				926,862
	Plaza 25		648,160				594,175
	Proforma operating income	$	1,297,485			$	1,037,972
Cherry Creek [Member]	'
Schedule of Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	'
	The following table summarizes the Company’s preliminary allocation of the purchase price of assets acquired and liabilities assumed during the three and six months ended June 30, 2014:
		Cherry Creek
	Land	$	25,745,012
	Building and improvements		15,771,277
	Tenant Improvements		4,372,849
	Acquired intangible assets		12,009,085
	Accounts payable and accrued liabilities		(815,378	)
	Lease intangible liability		(249,409	)
	Fair value of assets and liabilities at acquisition	$	56,833,436
Plaza 25 [Member]	'
Schedule of Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	'
	The following table summarizes the Company’s preliminary allocation of the purchase price of assets acquired and liabilities assumed during the three and six months ended June 30, 2014:
		Plaza 25
	Land	$	1,764,235
	Building and improvements		18,486,580
	Tenant Improvements		2,075,932
	Acquired intangible assets		2,923,754
	Accounts payable and accrued liabilities		228,187
	Lease intangible liability		(327,906	)
	Total consideration	$	25,150,782

Lease_Intangibles_Tables

Lease Intangibles (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Schedule of Lease Intangibles and Value of Assumed Lease Obligations	'
	Lease intangibles and the value of assumed lease obligations as of June 30, 2014 and December 31, 2013 were comprised as follows:
	June 30, 2014	Above Market			In Place			Leasing			Total			Below Market			Below Market			Total
		Leases			Leases			Commissions						Leases			Ground Lease
	Cost	$	6,738,058		$	19,896,523		$	11,578,532		$	38,213,113		$	(746,219	)	$	(138,218	)	$	(884,437	)
	Accumulated amortization		(2,711,000	)		(7,575,794	)		(2,644,771	)		(12,931,565	)		174,138			18,214			192,352
		$	4,027,058		$	12,320,729		$	8,933,761		$	25,281,548		$	(572,081	)	$	(120,004	)	$	(692,085	)
	December 31, 2013	Above Market			In Place			Leasing			Total			Below Market			Below Market			Total
		Leases			Leases			Commissions						Leases			Ground Lease
	Cost	$	3,043,030		$	14,885,115		$	5,447,198		$	23,375,343		$	(168,904	)	$	(138,218	)	$	(307,122	)
	Accumulated Amortization		(1,306,326	)		(6,536,311	)		(1,781,143	)		(9,623,780	)		123,567			16,209			139,776
		$	1,736,704		$	8,348,804		$	3,666,055		$	13,751,563		$	(45,337	)	$	(122,009	)	$	(167,346	)
Estimated Aggregate Amortization Expense for Lease Intangibles	'
	The estimated aggregate amortization expense for lease intangibles for the five succeeding years and in the aggregate are as follows:
	2014	$	3,025,920
	2015		6,289,564
	2016		5,475,934
	2017		2,932,560
	2018		1,721,733
	Thereafter		5,143,752
		$	24,589,463

Debt_Tables

Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Summary of Secured Indebtedness	'
	The following table summarizes the secured indebtedness as of June 30, 2014 and December 31, 2013:
	Property		June 30,		December 31,		Interest			Maturity
			2014		2013		Rate as of
							30-Jun-14
	Revolving Credit Facility (1)		$	—	$	—		LIBOR +2.75	%(2)	Apr-16
	AmberGlen Mortgage Loan (3)			25,365,817		—		4.38	%	May-19
	Midland Life Insurance (4)			95,000,000		—		4.34	%	May-21
	Washington Group Plaza (5)			34,636,645		34,949,159		3.85	%	Jul-18
	City Center (6)			—		22,333,938		—		Jun-14
	Central Fairwinds (7)			—		10,000,000		—		October 2015
	Corporate Parkway (7)			—		19,133,333		—		Apr-16
	AmberGlen (8)			—		23,500,000		—		Jul-17
	Total		$	155,002,462	$	109,916,430
	All interest rates are fixed interest rates with the exception of the revolving credit facility as explained in footnote 1 below.
	(1)	The Revolving Credit Facility currently has $30 million authorized with $26.4 million available immediately. In addition, the Revolving Credit Facility has an accordion feature that will permit us to borrow up to $150 million, subject to additional collateral availability and lender approval. The revolving credit facility bears an interest rate of LIBOR plus 2.75% and requires the company to maintain a fixed charge coverage ratio of no less than 1.60x.
	(2)	As of June 30, 2014, the 3 Month LIBOR rate was 0.27%.
	(3)	Following the Formation Transactions, on April 29, 2014, we entered into a new mortgage loan in relation to the AmberGlen property for $25.4 million. The loan bears an interest rate of 4.38% and matures on May 1, 2019. The Company is required to maintain a minimum net worth of $25 million and a minimum liquidity of $2 million.
	(4)	The loan is cross-collateralized by Corporate Parkway, Cherry Creek and City Center. Interest only until February 2016 then interest payable monthly plus principal based on 360 months of amortization. The loan bears a fixed interest rate of 4.34% and matures on May 6, 2021.
	(5)	Interest payable monthly plus principal based on 360 months of amortization.
	-6	Interest payable monthly plus monthly principal payment of $20,000. This loan was extinguished on April 21, 2014 in relation to the Formation Transaction.
	(7)	Interest only payable monthly, principal due on maturity. This loan was extinguished on April 21, 2014 in relation to the Formation Transactions.
	-8	This Amberglen loan was refinanced on April 29, 2014 with the new Amberglen Loan discussed in footnote (3) above.
Schedule of Principal Repayments of Mortgage Payable	'
	The scheduled principal repayments of mortgage payable as of June 30, 2014 are as follows:
	2014		$	516,623
	2015			1,065,209
	2016			2,020,590
	2017			2,772,027
	2018			34,522,392
	Thereafter			114,105,621
			$	155,002,462

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2014

Investments All Other Investments [Abstract]

'

Summary of Interest Rate Derivative Not Designated as Cash Flow Hedge

'

Summarized below is the interest rate derivative that was not designated as a cash flow hedge and the fair value of all derivative assets and liabilities as of December 31, 2013. The interest rate swap was subsequently terminated upon completion of the IPO.

Type of

Notional

Maturity

Fair Value as of

Property

Instrument

amount

date

Effective rate

December 31, 2013

City Center

Interest Rate Swap

$

15,000,000

—

6

%

$

—

Future_Minimum_Rent_Schedule_T

Future Minimum Rent Schedule (Tables)	6 Months Ended
	Jun. 30, 2014
Leases [Abstract]	'
Schedule of Future Minimum Lease Payments under Noncancellable Operating Leases	'
	Future minimum lease payments to be received as of June 30, 2014 under noncancellable operating leases for the next five years and thereafter are as follows:
	2014	$	15,992,612
	2015		32,611,575
	2016		25,801,105
	2017		17,645,841
	2018		13,975,673
	Thereafter		57,764,006
		$	163,790,812

Earnings_per_Share_Tables

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings per Share	'
	The following table shows the amounts used in computing the Company’s basic and diluted earnings per share. As of the three and six months ended June 30, 2014, there is no dilution to earnings per share.
		Three Months Ended			Six Months Ended
		June 30, 2014			June 30, 2014
	Numerator for earnings per share – basic and diluted
	Net loss	$	(3,067,430	)	$	(864,102	)
	Less: Net loss attributable to noncontrolling interests in properties		69,044			78,970
	Less: Net loss attributable to Predecessor		240,057			(1,973,197	)
	Less: Net loss attributable to Operating Partnership unitholders’ noncontrolling interests		814,127			814,127
	Numerator for earnings per share – basic and diluted	$	1,944,202		$	1,944,202
	Denominator for earnings per share – basic and diluted		8,057,521			8,057,521
	Basic and diluted earnings per share	$	(0.24	)	$	(0.24	)

Organization_and_Description_o2

Organization and Description of Business - Additional Information (Detail) (USD $)	0 Months Ended		6 Months Ended
	9-May-14	Apr. 21, 2014	Jun. 30, 2014	Apr. 21, 2014
			Property	Property
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Company formation date	'	'	26-Nov-13	'
Operation commencement date	'	'	21-Apr-14	'
Number of properties acquired	'	'	6	'
Common stock issued in IPO, shares	'	5,800,000	5,800,000	'
Common stock issued in IPO, price per share	'	'	'	$12.50
Shares issued to underwriters under overallotment option	782,150	'	782,150	'
IPO Closed date	'	'	21-Apr-14	'
Gross proceeds from IPO	$9,800,000	$72,500,000	'	'
Net proceeds from IPO	9,100,000	63,400,000	63,400,000	'
Underwriting discounts	700,000	5,100,000	'	'
Other expenses relating to IPO	'	4,000,000	'	'
Purchase consideration, cash paid	'	19,400,000	'	'
Percent of ownership interest acquired in properties	'	'	71.60%	'
Common stock redemption value, in cash	9,100,000	'	'	'
Number of properties in which loan refinanced	'	'	'	3
Washington Group Plaza [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	100.00%	'	100.00%
Cherry Creek [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	100.00%	'	100.00%
Corporate Parkway [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	100.00%	'	100.00%
AmberGlen [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	76.00%	'	76.00%
Central Fairwinds [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	90.00%	'	90.00%
City Center Property [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Percent of ownership interest acquired in properties	'	95.00%	'	95.00%
Non-Recourse Mortgage Loan [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Non-recourse mortgage loan, amount	'	$95,000,000	'	$95,000,000
Non-recourse mortgage loan, interest rate	'	4.34%	'	4.34%
Non-recourse mortgage loan, maturity date	'	'	6-May-21	'
Common Units [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Purchase consideration, units issued	'	3,731,209	3,251,904	'
Previously issued number of redeemable shares	479,305	'	'	'
Common Stock [Member]	'	'	'	'
Business Description And Basis Of Presentation [Line Items]	'	'	'	'
Purchase consideration, units issued	'	1,610,765	'	'
Previously issued number of redeemable shares	248,095	'	'	'

Organization_and_Description_o3

Organization and Description of Business - Summary of Predecessor and Company's Statement of Operations (Detail) (USD $)	3 Months Ended			6 Months Ended	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Apr. 20, 2014	Jun. 30, 2014	Apr. 20, 2014	Jun. 30, 2013	Apr. 20, 2014	Jun. 30, 2013
					Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
Revenues:	'	'	'	'	'	'	'	'
Rental income	$6,085,796	$7,714,275	'	$14,951,033	$1,628,480	$3,819,689	$8,865,238	$6,715,922
Expense reimbursement	397,203	502,772	'	952,814	105,569	398,259	555,611	686,495
Other	128,963	176,162	'	471,822	47,198	190,941	342,859	390,734
Total Revenues	6,611,962	8,393,209	'	16,375,669	1,781,247	4,408,889	9,763,708	7,793,151
Operating Expenses:	'	'	'	'	'	'	'	'
Property operating expenses	1,757,182	2,267,612	'	4,522,074	510,431	1,232,834	2,764,893	2,185,669
Insurance	145,998	169,568	'	322,426	23,570	119,481	176,428	230,598
Property taxes	424,524	561,208	'	1,022,312	136,684	250,168	597,788	556,553
Property management fees	158,896	186,162	'	393,779	27,265	131,315	234,882	253,534
Acquisition costs	343,803	343,803	'	1,150,147	'	1,479,292	806,344	1,479,292
Base management fees	185,176	185,176	'	185,176	'	'	'	'
Stock based compensation	285,142	285,142	'	285,142	'	'	'	'
General and administrative	334,504	364,303	'	414,303	29,799	'	79,799	'
Depreciation and amortization	2,713,845	3,415,807	'	6,575,784	701,962	1,591,389	3,861,939	2,715,369
Total Operating Expenses	6,349,070	7,778,781	'	14,871,143	1,429,711	4,804,479	8,522,073	7,421,015
Operating income	262,892	614,428	'	1,504,526	351,536	-395,590	1,241,635	372,136
Interest expense, net	-2,966,616	-1,785,288	'	-3,954,535	-610,378	-1,030,906	-3,771,792	-1,836,433
Change in fair value of earn-out	-104,865	-104,865	'	-104,865	'	'	'	'
Gain on equity investment	'	'	'	4,474,644	'	'	4,474,644	'
Net loss	-2,808,589	-3,067,430	1,944,487	-864,102	-258,842	-1,422,382	1,973,197	-1,499,092
Net Loss attributable to noncontrolling interests in properties	50,260	'	'	'	18,785	'	28,710	'
Net (Loss)/Income attributable to Predecessor	'	-240,057	'	1,973,197	-240,057	-1,397,113	1,973,197	-1,460,104
Net loss attributable to Operating Partnership noncontrolling interests	814,127	-814,127	'	-814,127	'	'	'	'
Net loss attributable to Stockholders	($1,944,202)	($1,944,202)	'	($1,944,202)	'	'	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	12-May-14	Apr. 21, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
					Common Units [Member]	Common Units [Member]	Common Stockholders [Member]	Common Unitholders [Member]
Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'	'
Percentage of REIT taxable income distributed to stockholders	'	'	90.00%	'	'	'	'	'
Purchase consideration, units issued	'	'	'	'	3,731,209	3,251,904	'	'
Percent of ownership interest acquired in properties	71.60%	71.60%	71.60%	'	'	'	'	'
Dividends	$2,094,400	'	$2,100,000	'	'	'	$1,500,000	$600,000
dividends payable date	'	'	17-Jul-14	'	'	'	'	'
Cash dividend per share	$0.24	$0.24	$0.24	$0.18	'	'	'	'
Potentially dilutive shares outstanding	'	3,251,904	3,251,904	'	'	'	'	'

Real_Estate_Investments_Schedu

Real Estate Investments - Schedule of Acquired Properties (Detail)	Jun. 30, 2014	Apr. 21, 2014	Jun. 30, 2014	Jun. 30, 2014	Jan. 02, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 04, 2014
		Cherry Creek [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
			Cherry Creek [Member]	Cherry Creek [Member]	Cherry Creek [Member]	Plaza 25 [Member]	Plaza 25 [Member]	Plaza 25 [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Real estate property, date acquired	'	'	'2014-01	'	'	'2014-06	'	'
Real estate property, percentage owned	71.60%	100.00%	'	100.00%	57.70%	'	100.00%	100.00%

Real_Estate_Investments_Additi

Real Estate Investments - Additional Information (Detail) (USD $)

0 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

Apr. 21, 2014

Jun. 30, 2014

Apr. 21, 2014

Jan. 02, 2014

Apr. 20, 2014

Dec. 31, 2013

Jan. 02, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 04, 2014

Jun. 30, 2014

Jun. 04, 2014

Cherry Creek [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Cherry Creek [Member]

Cherry Creek [Member]

Cherry Creek [Member]

Plaza 25 [Member]

Plaza 25 [Member]

Plaza 25 [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Business acquisition, ownership percentage

'

71.60%

100.00%

'

'

'

57.70%

100.00%

100.00%

'

100.00%

100.00%

Business acquisition, purchase consideration

$19,400,000

'

'

$12,000,000

'

'

$12,000,000

'

$12,020,893

$25,100,000

'

'

Business acquisition, liabilities assumed

'

'

'

'

'

'

50,000,000

'

'

'

'

'

Repayment of debt

'

'

'

'

'

'

36,000,000

'

36,000,000

'

'

'

Business acquisition, deferred financing costs

'

2,734,641

'

'

'

1,167,666

1,200,000

'

'

'

'

'

Business acquisition, transaction costs

'

'

'

'

'

'

800,000

'

'

'

'

'

Expenses related to acquisition

'

'

'

'

'

'

'

806,344

806,344

'

'

'

Gain on equity investment

'

$4,474,644

'

'

$4,474,644

'

'

'

$4,500,000

'

'

'

Real_Estate_Investments_Schedu1

Real Estate Investments - Schedule of Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Jun. 30, 2014
Cherry Creek [Member]	'
Business Acquisition [Line Items]	'
Land	$25,745,012
Building and improvements	15,771,277
Tenant Improvements	4,372,849
Acquired intangible assets	12,009,085
Accounts payable and accrued liabilities	-815,378
Lease intangible liability	-249,409
Fair value of assets and liabilities at acquisition	56,833,436
Plaza 25 [Member]	'
Business Acquisition [Line Items]	'
Land	1,764,235
Building and improvements	18,486,580
Tenant Improvements	2,075,932
Acquired intangible assets	2,923,754
Accounts payable and accrued liabilities	228,187
Lease intangible liability	-327,906
Fair value of assets and liabilities at acquisition	$25,150,782

Real_Estate_Investments_Schedu2

Real Estate Investments - Schedule of Realized Gain Loss on Investments (Detail) (USD $)	0 Months Ended		0 Months Ended		0 Months Ended	6 Months Ended
	Apr. 21, 2014	Jun. 30, 2014	Jan. 02, 2014	Dec. 31, 2013	Jan. 02, 2014	Jun. 30, 2014
		Cherry Creek [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
					Cherry Creek [Member]	Cherry Creek [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Fair value of assets and liabilities acquired	'	$56,833,436	'	'	'	$56,833,436
Less existing mortgage in Cherry Creek	'	'	'	'	-36,000,000	-36,000,000
Fair value of assets and liabilities acquired, after mortgage	'	'	'	'	'	20,833,436
Less cash paid to seller	-19,400,000	'	-12,000,000	'	-12,000,000	-12,020,893
Fair value of 42.3% equity interest	'	'	'	'	'	8,812,543
Carrying value of investment in Cherry Creek	'	'	'	-4,337,899	'	-4,337,899
Gain on existing 42.3% equity interest	'	'	'	'	'	$4,474,644

Real_Estate_Investments_Schedu3

Real Estate Investments - Schedule of Realized Gain Loss on Investments (Parenthetical) (Detail) (Predecessor [Member], Cherry Creek [Member])	Jun. 30, 2014
Predecessor [Member] | Cherry Creek [Member]	'
Business Acquisition [Line Items]	'
Percentage of equity interest	42.30%

Real_Estate_Investments_Schedu4

Real Estate Investments - Schedule of Operating Results Relating to Acquired Entities (Detail) (USD $)	3 Months Ended		6 Months Ended	1 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Apr. 20, 2014	Jun. 30, 2013	Apr. 20, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014
				Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
								Cherry Creek [Member]	Cherry Creek [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Operating revenues	$6,085,796	$7,714,275	$14,951,033	$1,628,480	$3,819,689	$8,865,238	$6,715,922	$2,012,971	$3,724,473
Operating expenses	-1,757,182	-2,267,612	-4,522,074	-510,431	-1,232,834	-2,764,893	-2,185,669	-1,672,109	-3,704,122
Interest expense, net	'	'	'	'	'	'	'	-867,153	-2,370,974
Loss from Continuing Operations before Equity Method Investments, Income Taxes	'	'	'	'	'	'	'	($526,291)	($2,350,623)

Real_Estate_Investments_Schedu5

Real Estate Investments - Schedule of Business Acquisition Pro Forma Results of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended			1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Apr. 20, 2014	Jun. 30, 2013	Apr. 20, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013
				Cherry Creek [Member]	Plaza 25 [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
										Cherry Creek [Member]	Plaza 25 [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Total revenues as reported by City Office REIT, Inc. and Predecessor	$6,611,962	$8,393,209	$16,375,669	'	'	$1,781,247	$4,408,889	$9,763,708	$7,793,151	'	'
Proforma total revenues	'	'	17,989,533	'	1,613,864	'	'	'	12,646,935	3,258,954	1,594,830
Total operating income as reported by the City Office REIT, Inc. and Predecessor	262,892	614,428	1,504,526	1,504,526	'	351,536	-395,590	1,241,635	372,136	372,136	'
Property acquisition costs	-343,803	-343,803	-1,150,147	-855,201	'	'	-1,479,292	-806,344	-1,479,292	-855,201	'
Proforma operating income	'	'	$1,297,485	'	$648,160	'	'	'	$1,037,972	$926,862	$594,175

Lease_Intangibles_Schedule_of_

Lease Intangibles - Schedule of Lease Intangibles and Value of Assumed Lease Obligations (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
		Above Market Leases [Member]	In Place Leases [Member]	Leasing Commissions [Member]	Above Market and In Place Leases and Leasing Commissions [Member]	Below Market Leases [Member]	Below Market Ground Lease [Member]	Total of Below Market and Below Market Ground Leases [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
										Above Market Leases [Member]	In Place Leases [Member]	Leasing Commissions [Member]	Above Market and In Place Leases and Leasing Commissions [Member]	Below Market Leases [Member]	Below Market Ground Lease [Member]	Total of Below Market and Below Market Ground Leases [Member]
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Cost	'	$6,738,058	$19,896,523	$11,578,532	$38,213,113	($746,219)	($138,218)	($884,437)	'	$3,043,030	$14,885,115	$5,447,198	$23,375,343	($168,904)	($138,218)	($307,122)
Accumulated amortization	'	-2,711,000	-7,575,794	-2,644,771	-12,931,565	174,138	18,214	192,352	'	-1,306,326	-6,536,311	-1,781,143	-9,623,780	123,567	16,209	139,776
Total	$25,281,548	$4,027,058	$12,320,729	$8,933,761	$25,281,548	($572,081)	($120,004)	($692,085)	$13,751,563	$1,736,704	$8,348,804	$3,666,055	$13,751,563	($45,337)	($122,009)	($167,346)

Lease_Intangibles_Additional_I

Lease Intangibles - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Prior period reclassification adjustment of lease intangibles and accounts payable and accrued liabilities	$649,192
Impact to net income	$0

Lease_Intangibles_Estimated_Ag

Lease Intangibles - Estimated Aggregate Amortization Expense for Lease Intangibles (Detail) (USD $)	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
2014	$3,025,920
2015	6,289,564
2016	5,475,934
2017	2,932,560
2018	1,721,733
Thereafter	5,143,752
Total	$24,589,463

Debt_Summary_of_Secured_Indebt

Debt - Summary of Secured Indebtedness (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'
Secured indebtedness	$155,002,462	$109,916,430
Revolving Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	'	'
Interest Rate, Description	'LIBOR +2.75%	'
Maturity	'2016-04	'
Washington Group Plaza [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	34,636,645	34,949,159
Interest Rate	3.85%	'
Maturity	'2018-07	'
AmberGlen Mortgage Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	25,365,817	'
Interest Rate	4.38%	'
Maturity	'2019-05	'
Midland Life Insurance [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	95,000,000	'
Interest Rate	4.34%	'
Maturity	'2021-05	'
City Center [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	'	22,333,938
Maturity	'2014-06	'
Central Fairwinds [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	'	10,000,000
Maturity	'2015-10	'
Corporate Parkway [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	'	19,133,333
Maturity	'2016-04	'
AmberGlen [Member]	'	'
Debt Instrument [Line Items]	'	'
Secured indebtedness	'	$23,500,000
Maturity	'2017-07	'

Debt_Summary_of_Secured_Indebt1

Debt - Summary of Secured Indebtedness (Parenthetical) (Detail) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'
Mortgage loan	$155,002,462	$109,916,430
Washington Group Plaza [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	34,636,645	34,949,159
Effective interest rate of loan	3.85%	'
Amortization period	'360 months	'
AmberGlen Mortgage Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	25,365,817	'
Effective interest rate of loan	4.38%	'
Loan maturity date	1-May-19	'
Minimum net worth required	25,000,000	'
Minimum liquidity requirements	2,000,000	'
Midland Life Insurance [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	95,000,000	'
Effective interest rate of loan	4.34%	'
Loan maturity date	6-May-21	'
Amortization period	'360 months	'
City Center [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	'	22,333,938
Monthly interest payable plus principal payment	'	20,000
Loan extinguishment date	21-Apr-14	'
Central Fairwinds [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	'	10,000,000
Loan extinguishment date	21-Apr-14	'
Corporate Parkway [Member]	'	'
Debt Instrument [Line Items]	'	'
Mortgage loan	'	19,133,333
Loan extinguishment date	21-Apr-14	'
Revolving Credit Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Revolving Credit Facility, authorized amount	30,000,000	'
Revolving Credit Facility, current borrowing capacity	26,400,000	'
Revolving Credit Facility, accordion feature	150,000,000	'
Revolving Credit Facility interest rate, description	'LIBOR plus 2.75%	'
Revolving Credit Facility interest rate, percentage	2.75%	'
3 Month LIBOR rate	0.27%	'
Mortgage loan	'	'
Revolving Credit Facility [Member] | Minimum [Member]	'	'
Debt Instrument [Line Items]	'	'
Fixed charge coverage ratio	1.6	'

Debt_Additional_Information_De

Debt - Additional Information (Detail) (Plaza 25 [Member], USD $)	Jun. 13, 2014
In Millions, unless otherwise specified
Plaza 25 [Member]	'
Debt Instrument [Line Items]	'
Maximum amount of Revolving Credit Facility	$30

Debt_Schedule_of_Principal_Rep

Debt - Schedule of Principal Repayments of Mortgage Payable (Detail) (USD $)	Jun. 30, 2014
Debt Disclosure [Abstract]	'
2014	$516,623
2015	1,065,209
2016	2,020,590
2017	2,772,027
2018	34,522,392
Thereafter	114,105,621
Total principal repayments of mortgage payable	$155,002,462

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	6 Months Ended		1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Oct. 31, 2016
	sqft		Scenario, Forecast [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'
Hedges or derivatives	$0	'	'
Fair value, discount rate	8.00%	'	'
Approximate square feet of additional lease space	40,000	'	'
Percentage of lease space occupancy	67.00%	'	85.00%
Average net effective rent per square foot	14	'	'
Incremental operating costs per square foot	4	'	'
Percentage of increase or decrease in potential gain or loss by varying the significant unobservable inputs	10.00%	'	'
Potential loss by varying the significant unobservable inputs	400,000	'	'
Potential gain by varying the significant unobservable inputs	400,000	'	'
Mortgage loans payable, fair value	$155,000,000	$88,500,000	'

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Summary of Interest Rate Derivative Not Designated as Cash Flow Hedge (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
		City Center [Member]
		Predecessor [Member]
Derivatives, Fair Value [Line Items]	'	'
Type of Instrument	'	'Interest Rate Swap
Notional amount	'	$15,000,000
Maturity date	'	NaN, NaN
Effective rate	'	6.00%
Fair Value	$0	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	0 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	9-May-14	Jun. 30, 2014
		Property
Related Party Transaction [Line Items]	'	'
Proceeds from previously issued redeemable shares value	$9.10	'
Number of real estate properties	'	3
Property management fee, Description	'	'Fee ranging from 1.75% to 3.5% of gross revenue
Common Units [Member]	'	'
Related Party Transaction [Line Items]	'	'
Previously issued number of redeemable shares	479,305	'
Common Stock [Member]	'	'
Related Party Transaction [Line Items]	'	'
Previously issued number of redeemable shares	248,095	'
Washington Group Plaza [Member]	'	'
Related Party Transaction [Line Items]	'	'
Property management fee, percentage of gross revenue	'	1.00%
Property management fee in excess of net operating income, percentage	'	15.00%
Washington Group Plaza [Member] | 2013 [Member]	'	'
Related Party Transaction [Line Items]	'	'
Minimum property management fee	'	5
Washington Group Plaza [Member] | 2014 [Member]	'	'
Related Party Transaction [Line Items]	'	'
Minimum property management fee	'	5.45
Washington Group Plaza [Member] | 2015 [Member]	'	'
Related Party Transaction [Line Items]	'	'
Minimum property management fee	'	5.6
Asset management agreement initial term	'	'3 years
Asset management agreement renewal term	'	'2 years
Asset management agreement termination description	'	'This agreement can be terminated by the Company or the property manager upon thirty days prior written notice to the other party.
Second City Group [Member]	'	'
Related Party Transaction [Line Items]	'	'
Formation transactions completed date	'	21-Apr-14
Consideration for formation transactions	'	19.4
Additional payments to Second City reimbursement of IPO	'	4.9
Additional payments to the Second City Group for working capital	'	1.8
Proceeds from previously issued redeemable shares value	9.1	'
Second City Group [Member] | Common Units [Member]	'	'
Related Party Transaction [Line Items]	'	'
Previously issued number of redeemable shares	479,305	'
Second City Group [Member] | Common Stock [Member]	'	'
Related Party Transaction [Line Items]	'	'
Previously issued number of redeemable shares	248,095	'
Formation Transactions [Member]	'	'
Related Party Transaction [Line Items]	'	'
Additional payments to Second City reimbursement of IPO	'	4.9
Minimum [Member]	'	'
Related Party Transaction [Line Items]	'	'
Property management fee, percentage	'	1.75%
Maximum [Member]	'	'
Related Party Transaction [Line Items]	'	'
Property management fee, percentage	'	3.50%

Future_Minimum_Rent_Schedule_S

Future Minimum Rent Schedule - Schedule of Future Minimum Lease Payments under Noncancellable Operating Leases (Detail) (USD $)	Jun. 30, 2014
Leases [Abstract]	'
2014	$15,992,612
2015	32,611,575
2016	25,801,105
2017	17,645,841
2018	13,975,673
Thereafter	57,764,006
Total future minimum lease payments to be received	$163,790,812

Future_Minimum_Rent_Schedule_A

Future Minimum Rent Schedule - Additional Information (Detail)	Jun. 30, 2014
Leases [Abstract]	'
Percentage of total future minimum lease payments	47.40%

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
Other Commitments [Line Items]	'	'	'
Estimated fair value of earn-out liability	$7,100,000	$7,100,000	$7,100,000
Change in fair value of earn-out	$104,865	$104,865	$104,865
Central Fairwinds [Member]	'	'	'
Other Commitments [Line Items]	'	'	'
Percentage of leased area	72.10%	72.10%	72.10%
Stabilized capitalization rate	'	'	7.75%
Earn-Out Payment, Description	'	'	'The Company will make any additional Earn-Out Payment within 30 days of the end of the Earn-Out Term based on new qualified leases entered into since the achievement of the last Earn-Out Threshold.
Range 1 [Member] | Central Fairwinds [Member]	'	'	'
Other Commitments [Line Items]	'	'	'
Percentage of Earn-Out Threshold	'	'	70.00%
Range 2 [Member] | Central Fairwinds [Member]	'	'	'
Other Commitments [Line Items]	'	'	'
Percentage of Earn-Out Threshold	'	'	80.00%
Range 3 [Member] | Central Fairwinds [Member]	'	'	'
Other Commitments [Line Items]	'	'	'
Percentage of Earn-Out Threshold	'	'	90.00%

Earnings_per_Share_Computation

Earnings per Share - Computation of Basic and Diluted Earnings per Share (Detail) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Apr. 20, 2014	Jun. 30, 2014
Numerator for earnings per share - basic and diluted	'	'	'	'
Net loss	($2,808,589)	($3,067,430)	$1,944,487	($864,102)
Less: Net loss attributable to noncontrolling interests in properties	'	69,044	'	78,970
Less: Net loss attributable to Predecessor	'	240,057	'	-1,973,197
Less: Net loss attributable to Operating Partnership unitholders' noncontrolling interests	-814,127	814,127	'	814,127
Numerator for earnings per share - basic and diluted	$1,944,202	$1,944,202	'	$1,944,202
Denominator for earnings per share - basic and diluted	'	8,057,521	'	8,057,521
Basic and diluted earnings per share	'	($0.24)	'	($0.24)

Stockholders_Equity_Additional

Stockholder's Equity - Additional Information (Detail) (USD $)	0 Months Ended		6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	9-May-14	Apr. 21, 2014	Jun. 30, 2014	Apr. 21, 2014	Jun. 30, 2014	Jun. 30, 2014
				Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member]
						Installment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Common stock issued in IPO, shares	'	5,800,000	5,800,000	'	'	'
Net proceeds from IPO	$9.10	$63.40	$63.40	'	'	'
Shares issued to underwriters under overallotment option	782,150	'	782,150	'	'	'
Additional net proceeds from IPO	'	'	9.1	'	'	'
Operating partnership units	'	'	3,251,904	'	'	'
Percentage of operating partnership unit	'	'	28.40%	'	'	'
Partnership unit, description	'	'	'Beginning on or after the date which is 12 months after the later of the completion of this offering or the date on which a person first became a holder of common units, each limited partner and assignees of limited partners will have the right, subject to the terms and conditions set forth in the partnership agreement, to require the Operating Partnership to redeem all or a portion of the common units held by such limited partner or assignee in exchange for a cash amount per common unit equal to the value of one share of common stock, determined in accordance with and subject to adjustment under the partnership agreement. The Company has the sole option at its discretion to redeem the common units by issuing common stock on a one for one basis.	'	'	'
Maximum number of shares issued under Equity Incentive Plan	'	'	1,263,580	'	'	'
Restricted stock units granted to executive officers	'	'	'	352,272	'	'
Restricted stock units grant date fair value	'	'	'	$12.50	'	'
Restricted stock units, value	'	'	'	4.4	'	'
Net compensation expense	'	'	'	'	$0.30	$0.30
Number of annual installments for award vesting	'	'	'	'	'	3

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended
	Apr. 21, 2014	Jul. 18, 2014	Jul. 18, 2014
		Subsequent Event [Member]	Subsequent Event [Member]
		Dallas Texas [Member]	Dallas Texas [Member]
Subsequent Event [Line Items]	'	'	'
Payment to acquire property	$19,400,000	$28,400,000	'
Business acquisition made in cash and revolving credit facility	'	'	9,900,000
Mortgages loan for property acquire	'	'	$18,500,000
Mortgage, Fixed interest rate	'	4.28%	'
Mortgage, mature date	'	6-Aug-24	'