City Office REIT (CIO) 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	5-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	CIO
Entity Registrant Name	City Office REIT, Inc.
Entity Central Index Key	1593222
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		12,404,730

Condensed_Consolidated_and_Com

Condensed Consolidated and Combined Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Real estate properties, cost
Land	$67,510	$66,204
Buildings and improvements	140,933	132,964
Tenant improvement	28,482	27,773
Furniture, fixtures and equipment	198	198
Real estate properties, gross	237,123	227,139
Accumulated depreciation	-17,719	-15,311
Real estate properties, net	219,404	211,828
Cash and cash equivalents	23,985	34,862
Restricted cash	9,227	11,093
Rents receivable, net	9,252	7,981
Deferred financing costs, net of accumulated amortization	2,731	2,901
Deferred leasing costs, net of accumulated amortization	3,003	2,618
Acquired lease intangibles assets, net	28,669	29,391
Prepaid expenses and other assets	322	832
Total Assets	296,593	301,506
Liabilities:
Debt	189,669	189,940
Accounts payable and accrued liabilities	3,917	4,080
Deferred rent	1,526	2,212
Tenant rent deposits	1,877	1,862
Acquired lease intangibles liability, net	855	606
Dividend distributions payable	3,571	3,571
Earn-out liability	8,000	8,000
Total Liabilities	209,415	210,271
Commitments and Contingencies (Note 9)
Equity:
Common stock, $0.01 par value, 100,000,000 shares authorized, 12,279,110 shares issued and outstanding	123	123
Additional paid-in capital	91,717	91,308
Accumulated deficit	-15,634	-11,320
Total Stockholders' Equity	76,206	80,111
Operating Partnership unitholders' non-controlling interests	11,701	11,878
Non-controlling interests in properties	-729	-754
Total Equity	87,178	91,235
Total Liabilities and Equity	$296,593	$301,506

Condensed_Consolidated_and_Com1

Condensed Consolidated and Combined Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	12,279,110	12,279,110
Common stock, shares outstanding	12,279,110	12,279,110

Condensed_Consolidated_and_Com2

Condensed Consolidated and Combined Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Rental income	$10,040
Expense reimbursement	891
Other	328
Total Revenues	11,259
Operating Expenses:
Property operating expenses	4,116
Acquisition costs	209
Stock-based compensation	409
General and administrative	408
Base management fee	332
Depreciation and amortization	4,406
Total Operating Expenses	9,880
Operating income	1,379
Interest Expense:
Contractual interest expense	-2,009
Amortization of deferred financing costs	-169
Interest expense, net	-2,178
Net (loss)/income	-799
Less: Net (income)/loss attributable to non-controlling interests in properties	-121
Less: Net loss attributable to Operating Partnership unitholders' non-controlling interests	177
Net loss attributable to stockholders	-743
Net loss per share:
Basic and diluted	($0.06)
Weighted average common shares outstanding:
Basic and diluted	12,279
Dividend distributions declared per common share and unit	$0.24
Predecessor [Member]
Revenues:
Rental income		7,237
Expense reimbursement		450
Other		295
Total Revenues		7,982
Operating Expenses:
Property operating expenses		3,126
Acquisition costs		806
Depreciation and amortization		3,160
Total Operating Expenses		7,092
Operating income		890
Interest Expense:
Contractual interest expense		-2,169
Amortization of deferred financing costs		-992
Interest expense, net		-3,161
Gain on equity investment		4,475
Net (loss)/income		2,204
Less: Net (income)/loss attributable to non-controlling interests in properties		10
Less: Net income attributable to Predecessor		$2,214

Condensed_Consolidated_and_Com3

Condensed Consolidated and Combined Statements of Changes in Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total Stockholders' Equity [Member]	Operating Partnership Unitholders' Non-controlling Interests [Member]	Non-controlling Interests in Properties [Member]
In Thousands, except Share data
Beginning balance at Dec. 31, 2014	$91,235	$123	$91,308	($11,320)	$80,111	$11,878	($754)
Beginning balance, shares at Dec. 31, 2014	12,279,110	12,279,000
Restricted stock award grants	409		409		409
Dividend distributions declared	-3,571			-3,571	-3,571
Contributions	0	0	0	0	0	0	0
Distributions	-96						-96
Net loss	-799			-743	-743	-177	121
Ending balance at Mar. 31, 2015	$87,178	$123	$91,717	($15,634)	$76,206	$11,701	($729)
Ending balance, shares at Mar. 31, 2015	12,279,110	12,279,000

Condensed_Consolidated_and_Com4

Condensed Consolidated and Combined Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net (loss)/income	($799)
Adjustments to reconcile net (loss)/income to net cash provided by operating activities:
Depreciation and amortization	4,406
Amortization of deferred financing costs	169
Amortization of above/below market leases	128
Increase in straight-line rent	-83
Non-cash stock compensation	409
Changes in non-cash working capital:
Rents receivable, net	-1,188
Prepaid expenses and other assets	510
Accounts payable and accrued liabilities	-210
Deferred rent	-686
Tenant rent deposits	15
Net Cash Provided By Operating Activities	2,671
Cash Flows to Investing Activities:
Additions to real estate properties	-485
Acquisition of real estate, net of cash assumed	-10,423
Deferred leasing cost	-568
Net Cash Used In Investing Activities	-11,476
Cash Flows from Financing Activities:
Repayment of mortgage loans payable	-271
Distributions to non-controlling interests in properties	-96
Dividend distributions paid to stockholders and Operating Partnership unitholders	-3,571
Change in restricted cash	1,866
Net Cash (Used)/Provided By Financing Activities	-2,072
Net Decrease in Cash and Cash Equivalents	-10,877
Cash and Cash Equivalents, Beginning of Period	34,862
Cash and Cash Equivalents, End of Period	23,985
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	2,097
Accrued dividend distributions payable	3,571
Predecessor [Member]
Cash Flows from Operating Activities:
Net (loss)/income		2,204
Adjustments to reconcile net (loss)/income to net cash provided by operating activities:
Depreciation and amortization		3,160
Amortization of deferred financing costs		992
Amortization of above/below market leases		124
Increase in straight-line rent		-709
Gain on equity investment		-4,475
Changes in non-cash working capital:
Rents receivable, net		-53
Prepaid expenses and other assets		-350
Accounts payable and accrued liabilities		1,750
Deferred rent		-578
Tenant rent deposits		122
Net Cash Provided By Operating Activities		2,187
Cash Flows to Investing Activities:
Additions to real estate properties		-320
Acquisition of real estate, net of cash assumed		-12,021
Deferred leasing cost		-65
Net Cash Used In Investing Activities		-12,406
Cash Flows from Financing Activities:
Debt issuance and extinguishment costs		-3,844
Proceeds from mortgage loans payable		50,000
Repayment of mortgage loans payable		-36,528
Contributions from partners and members		2,569
Contributions from non-controlling interests in properties		20
Distributions to partners and members		-1,347
Distributions to non-controlling interests in properties		-153
Change in restricted cash		-1,097
Net Cash (Used)/Provided By Financing Activities		9,620
Net Decrease in Cash and Cash Equivalents		-599
Cash and Cash Equivalents, Beginning of Period		7,128
Cash and Cash Equivalents, End of Period		6,529
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest		$1,957

Organization_and_Description_o

Organization and Description of Business	3 Months Ended
	Mar. 31, 2015
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.
	Unless the context suggests otherwise, references in this Annual Report on Form10-K to “Our Advisor” refers to our external advisor, City Office Real Estate Management Inc. “Second City” refers to Second City Capital Partners II, Limited Partnership. “Second City GP” refers to Second City General Partner II, Limited Partnership. “Gibralt” refers to Gibralt US, Inc. “GCC Amberglen” refers to GCC Amberglen Investments Limited Partnership. “CIO OP” refers to CIO OP Limited Partnership. “CIO REIT” refers to CIO REIT Stock Limited Partnership and CIO REIT Stock GP Limited Partnership. The “Second City Group” refers to Second City, any future real estate funds created by the principals of Second City, Second City GP, Gibralt, GCC Amberglen, CIO OP, CIO REIT and Daniel Rapaport.
	The historical financial results in these financial statements and the accompanying notes thereto 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 continue to operate in a manner that will allow it to qualify as a real estate investment trust (“REIT”) commencing with its initial taxable year ended December 31, 2014. Subject to qualification as a REIT, the Company will be permitted to deduct dividend 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 and state income tax on its taxable income at regular corporate tax rates and any applicable alternative minimum tax.
	Initial Public Offering and Formation Transactions
	The Company’s operations are 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.
	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 were used for general working capital purposes and to fund acquisitions. All net proceeds from the overallotment option were used to redeem common stock and units issued to the Second City Group in the Formation Transactions.
	Pursuant to the Formation Transactions, 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, 1,858,860 common stock and $19.4 million of cash. On May 9, 2014, the Company used the $9.1 million of net proceeds from the exercise of the underwriters’ overallotment option to redeem, 479,305 common units and 248,095 common stock from the Second City Group.
	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.
	All balances for the three months ended March 31, 2014 are those of the Predecessor.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
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 unaudited condensed consolidated and combined financial statements have been prepared by the Company in accordance with Securities and Exchange Commission rules and regulations and generally accepted accounting principles in the United States of America (“US GAAP”) and in the opinion of management contain all adjustments (including normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the periods presented. The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These interim consolidated financial statements should read in conjunction with the consolidated financial statements and related notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2014.
	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 in the Predecessor financial statements.
	New Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which creates a new Topic Accounting Standards Codification (Topic 606). The standard is principle-based and provides a five-step model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. This standard is effective for interim or annual periods beginning after December 15, 2017, and allows for either full retrospective or modified retrospective adoption. Early adoption of this standard is not allowed. We are currently evaluating the impact the adoption of Topic 606 will have on our financial statements.
	In January 2015, the FASB issued ASU No. 2015-01, “Income Statement—Extraordinary and Unusual Items.” ASU 2015-01 eliminates the concept of extraordinary items. However, the presentation and disclosure requirements for items that are either unusual or in nature or infrequent in occurrence remain and will be expanded to include items that are both unusual in nature and infrequent in occurrence. ASU 2015-01 is effective for periods beginning after December 15, 2015. We are currently evaluating the impact of adopting this new accounting standard on our financial statements.
	In February 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810)—Amendments to the Consolidation Analysis, which amends the criteria for determining which entities are considered variable interest entities (“VIE”), amends the criteria for determining if a service provider possesses a variable interest in a VIE and ends the deferral granted to investment companies for application of the VIE consolidation model. ASU 2015-02 is effective for annual periods, and interim periods therein, beginning after December 15, 2015. We are currently evaluating the impact the adoption of Topic 810 will have on our financial statements.

Real_Estate_Investments

Real Estate Investments	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Real Estate Investments	3. Real Estate Investments
	Acquisitions
	During the three months ended March 31, 2015 and 2014, the Company acquired the following properties:
	Property	Date Acquired			Percentage Owned
	Logan Tower		February 2015			100	%
	Cherry Creek		January 2014			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 allocation of the purchase price of assets acquired and liabilities assumed during the three months ended March 31, 2014 (in thousands):
		Cherry Creek
	Land	$	25,745
	Buildings and improvements		15,771
	Tenant improvements		4,372
	Acquired intangible assets		12,009
	Accounts payable and other liabilities		(815	)
	Lease intangible liabilities		(249	)
	Fair value of assets and liabilities at acquisition	$	56,833
	The Company recognized expenses relating to the Cherry Creek acquisition of $806,344 for the three months ended March 31, 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 (in thousands):
	Fair value of assets and liabilities acquired	$	56,833
	Less existing mortgage in Cherry Creek		(36,000	)
			20,833
	Less cash paid to seller		(12,021	)
	Fair value of 42.3% equity interest		8,812
	Carrying value of investment in Cherry Creek		(4,337	)
	Gain on existing 42.3% equity interest	$	4,475
	On February 4, 2015, the Company, through the Operating Partnership, acquired 100% of Logan Tower, a property in Denver, Colorado, for $10.4 million. The following table summarizes the Company’s allocation of the purchase price of assets acquired and liabilities assumed during the period ended March 31, 2015 (in thousands):
		Logan Tower
	Land	$	1,306
	Buildings and improvements		7,844
	Tenant improvements		353
	Acquired intangible assets		1,274
	Accounts payable and other liabilities		(48	)
	Lease intangible liabilities		(306	)
	Total consideration	$	10,423
	The operating results of the Logan Tower property since the date of acquisition have been included in the Company’s consolidated and combined financial statements for the three months ended March 31, 2015. The following table represents the results of the property’s operations since the date of acquisition on a stand-alone basis (in thousands).
		Period from date of
		acquisition on February 4,
		2015 to March 31, 2015
	Operating revenues	$	243
	Operating expenses		(417	)
	Interest		—
		$	(174	)
	The following table presents the unaudited revenues and income from continuing operations for Logan Tower on a pro forma basis as if the Company had completed the acquisition of the properties as of January 1, 2014 (in thousands):
		Three Months			Three Months
		Ended March 31,			Ended March 31,
		2015			2014
	Total revenues as reported by City Office REIT, Inc. and Predecessor	$	11,259		$	7,982
	Plus: Logan Tower		148			391
	Pro forma total revenues	$	11,407		$	8,373
	Total operating income as reported by the City Office REIT, Inc. and Predecessor	$	1,379		$	890
	Property acquisition costs		100			(100	)
	Plus: Logan Tower		(106	)		(279	)
	Pro forma operating income	$	1,373		$	511

Lease_Intangibles

Lease Intangibles	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Lease Intangibles	4. Lease Intangibles
	Lease intangibles and the value of assumed lease obligations as of March 31, 2015 and December 31, 2014 were comprised as follows (in thousands):
	March 31, 2015	Above			In Place			Leasing			Total			Below			Below			Total
		Market			Leases			Commissions						Market			Market
		Leases												Leases			Ground
																	Lease
	Cost	$	4,762			29,512			13,103			47,377			(1,052	)		(138	)		(1,190	)
	Accumulated amortization		(2,170	)		(12,360	)		(4,178	)		(18,708	)		314			21			335
		$	2,592			17,152			8,925			28,669			(738	)		(117	)		(855	)
	December 31, 2014	Above			In Place			Leasing			Total			Below			Below			Total
		Market			Leases			Commissions						Market			Market
		Leases												Leases			Ground
																	Lease
	Cost	$	4,762			28,505			12,926			46,193			(746	)		(138	)		(884	)
	Accumulated amortization		(1,985	)		(11,159	)		(3,658	)		(16,802	)		258			20			278
		$	2,777			17,346			9,268			29,391			(488	)		(118	)		(606	)
	The estimated aggregate amortization expense for lease intangibles for the five succeeding years and in the aggregate are as follows (in thousands):
	2015	$	5,548
	2016		6,932
	2017		4,334
	2018		2,838
	2019		2,625
	Thereafter		5,537
		$	27,814

Debt

Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	5. Debt
	The following table summarizes the secured indebtedness as of March 31, 2015 and December 31, 2014 (in thousands):
	Property		March 31,		December 31,		Interest Rate as			Maturity
			2015		2014		of March 31,
							2015
	Revolving Credit Facility (1)		$	—	$	—		LIBOR +2.75	%(2)	Apr-16
	AmberGlen Mortgage Loan (3)			25,053		25,158		4.38		May-19
	Midland Life Insurance (4)			95,000		95,000		4.34		May-21
	Lake Vista Pointe (5)			18,460		18,460		4.28		Aug-24
	Florida Research Park (5)(6)			17,000		17,000		4.44		Dec-24
	Washington Group Plaza (5)			34,156		34,322		3.85		Jul-18
	Total		$	189,669	$	189,940
	All interest rates are fixed interest rates with the exception of the revolving credit facility (“Revolving Credit Facility”) as explained in footnote 1 below.
	-1	The Revolving Credit Facility currently has $30 million authorized and available. In addition, the Revolving Credit Facility has an accordion feature that will permit the Company to borrow up to $150 million, subject to additional collateral availability and lender approval. The Company shall have the right and option to extend the Revolving Credit Facility to April 21, 2017 subject to satisfaction of certain conditions. The Revolving Credit Facility requires the Company to maintain a fixed charge coverage ratio of no less than 1.60x. At March 31, 2015, the Revolving Credit Facility is cross-collateralized by Central Fairwinds, Plaza 25 and Logan Tower.
	-2	As of March 31, 2015, the one month LIBOR rate was 0.18%.
	-3	We are required to maintain a minimum net worth of $25 million and a minimum liquidity of $2 million.
	-4	The mortgage loan is cross-collateralized by Corporate Parkway, Cherry Creek and City Center. Interest only until June 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 on mortgage loan is payable monthly plus principal based on 360 months of amortization.
	-6	The Company is required to maintain a minimum net worth of $17 million, minimum liquidity of $1.7 million and a debt service coverage ratio of no less than 1.15x.
	The scheduled principal repayments of mortgage payable as of March 31, 2015 are as follows (in thousands):
	2015		$	811
	2016			2,034
	2017			2,918
	2018			34,783
	2019			25,414
	Thereafter			123,709
	Total		$	189,669

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [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
	Earn-Out Liability
	The fair value of the Central Fairwinds earn-out (note 9) 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 14,000 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 74% signed and committed at March 31, 2015 to 80% by July 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.
	As of March 31, 2015 and December 31, 2014, the estimated fair value of the earn-out liability is $8.0 million. There was no change in fair value for the three months ended March 31, 2015.
	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 $0.1 million and a potential gain of $0.1 million. This potential gain or loss would be recorded through profit and loss.
	Cash Equivalents, Restricted Cash, Accounts Receivable, Accounts Payable and Accrued Liabilities
	The Company estimates that the fair value approximates carrying value due to the relatively short-term nature of these instruments.
	Fair Value of Financial Instruments Not Carried at Fair Value
	With the exception of fixed rate mortgage loans payable, the carrying amounts of the Company’s financial instruments approximate their fair value. The Company 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 $195,100,000 and $192,500,000 as of March 31, 2015 and December 31, 2014, respectively. Although the Company has determined 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	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	7. Related Party Transactions
	Formation and Equity 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 non-controlling 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, the Company used the $9.1 million of net proceeds from the underwriters’ exercise of the overallotment option to redeem 479,305 common units and 248,095 shares of common stock from the Second City Group.
	On December 23, 2014, the underwriters of the secondary public offering exercised their overallotment option to purchase an additional 512,664 shares of the Company`s common stock at the offering price of $12.50 a share resulting in additional net proceeds to the Company of $6.1 million after deducting underwriting discounts. The Company used the $6.1 million of net proceeds from exercise of the overallotment option to redeem 336,195 common units and 176,469 shares of common stock from the Second City Group.
	Property Management Fees
	Three of the Company`s 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.
	The property manager of Washington Group Plaza is 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 unless terminated (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.

Future_Minimum_Rent_Schedule

Future Minimum Rent Schedule	3 Months Ended
	Mar. 31, 2015
Leases [Abstract]
Future Minimum Rent Schedule	8. Future Minimum Rent Schedule
	Future minimum lease payments to be received as of March 31, 2015 under noncancellable operating leases for the next five years and thereafter are as follows (in thousands):
	2015	$	29,358
	2016		32,941
	2017		26,692
	2018		22,708
	2019		17,868
	Thereafter		62,037
		$	191,604
	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 40.7% of the Company’s total future minimum lease payments as of March 31, 2015.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
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 approximately 74.1% leased at March 31, 2015, 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 (see note 6).
	As of March 31, 2015 and December 31, 2014, the estimated fair value of the earn-out liability is $8.0 million. There was no change in fair value for the three months ended March 31, 2015.
	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 March 31, 2015 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.

Stockholders_Equity

Stockholder's Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholder's Equity	10. Stockholder’s Equity
	The Company issued 5,800,000 shares in 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 of $9.1 million after deducting underwriting discounts.
	On December 10, 2014, the Company completed a follow-on public offering pursuant to which the Company sold 3,750,000 shares of our common stock at a price of $12.50 per share. The Company raised $46.9 million in gross proceeds, resulting in net proceeds to the Company of approximately $43.7 million after deducting approximately $2.6 million in underwriting discounts and approximately $0.6 million in other expenses relating to the offering. On December 23, 2014, the underwriters of the offering exercised their overallotment option to purchase an additional 512,664 shares of our common stock at the offering price of $12.50 a share for additional gross proceeds to the Company of approximately $6.4 million resulting in net proceeds to the Company of $6.1 million after deducting approximately $0.3 million in underwriting discounts. All net proceeds from the underwriters’ exercise of the overallotment option were used to redeem 336,195 common units and 176,469 common stock held by the Second City Group.
	Non-controlling Interests
	Non-controlling interests in the Company represent common units of the Operating Partnership held by the Predecessor’s prior investors. Non-controlling interests consisted of 2,915,709 Operating Partnership common units and represented an approximately 19.2% interest in the Operating Partnership as of March 31, 2015. 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 the initial public 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.
	Common Stock and Common Unit Distributions
	On March 19, 2015, the Company’s board of directors declared a cash dividend distribution of $0.235 per share for the quarterly period ended March 31, 2015. The dividend was payable on April 17, 2015 to stockholders and common unitholders of record on April 3, 2015. Subsequent to March 31, 2015, $2.9 million in dividends was paid to stockholders and $0.7 million to common unitholders, totaling $3.6 million.
	Restricted Stock Units
	The Company has an equity incentive plan (“Equity Incentive 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 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.
	During the three months ended March 31, 2015, 50,864 RSUs were granted to directors and non-executive employees of the Advisor with a fair value of $0.4 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 months ended March 31, 2015, the Company recognized net compensation expense of $0.4 million related to the RSU’s. Subsequent to March 31, 2015, 125,620 restricted stock units vested.
	A RSU 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 RSU 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 RSU; 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 RSU vest.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	11. Subsequent Events
	On April 20, 2015, the Company, through the Operating Partnership, entered into an Agreement of Purchase and Sale to acquire a property in Denver, Colorado for $25.8 million. The principal conditions to the acquisition have been satisfied and the transaction is anticipated to close, subject to customary closing conditions, in June 2015. However, there can be no assurance as to the timing of the closing or whether the closing will actually occur.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Preparation and Summary of Significant Accounting Policies	Basis of Preparation and Summary of Significant Accounting Policies
	The accompanying unaudited condensed consolidated and combined financial statements have been prepared by the Company in accordance with Securities and Exchange Commission rules and regulations and generally accepted accounting principles in the United States of America (“US GAAP”) and in the opinion of management contain all adjustments (including normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the periods presented. The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These interim consolidated financial statements should read in conjunction with the consolidated financial statements and related notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2014.
	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 in the Predecessor financial statements.
New Accounting Pronouncements	New Accounting Pronouncements
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which creates a new Topic Accounting Standards Codification (Topic 606). The standard is principle-based and provides a five-step model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. This standard is effective for interim or annual periods beginning after December 15, 2017, and allows for either full retrospective or modified retrospective adoption. Early adoption of this standard is not allowed. We are currently evaluating the impact the adoption of Topic 606 will have on our financial statements.
	In January 2015, the FASB issued ASU No. 2015-01, “Income Statement—Extraordinary and Unusual Items.” ASU 2015-01 eliminates the concept of extraordinary items. However, the presentation and disclosure requirements for items that are either unusual or in nature or infrequent in occurrence remain and will be expanded to include items that are both unusual in nature and infrequent in occurrence. ASU 2015-01 is effective for periods beginning after December 15, 2015. We are currently evaluating the impact of adopting this new accounting standard on our financial statements.
	In February 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810)—Amendments to the Consolidation Analysis, which amends the criteria for determining which entities are considered variable interest entities (“VIE”), amends the criteria for determining if a service provider possesses a variable interest in a VIE and ends the deferral granted to investment companies for application of the VIE consolidation model. ASU 2015-02 is effective for annual periods, and interim periods therein, beginning after December 15, 2015. We are currently evaluating the impact the adoption of Topic 810 will have on our financial statements.

Real_Estate_Investments_Tables

Real Estate Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Schedule of Acquired Properties	During the three months ended March 31, 2015 and 2014, the Company acquired the following properties:
	Property	Date Acquired			Percentage Owned
	Logan Tower		February 2015			100	%
	Cherry Creek		January 2014			100	%
Cherry Creek [Member]
Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table summarizes the Company’s allocation of the purchase price of assets acquired and liabilities assumed during the three months ended March 31, 2014 (in thousands):
		Cherry Creek
	Land	$	25,745
	Buildings and improvements		15,771
	Tenant improvements		4,372
	Acquired intangible assets		12,009
	Accounts payable and other liabilities		(815	)
	Lease intangible liabilities		(249	)
	Fair value of assets and liabilities at acquisition	$	56,833
Schedule of Realized Gain Loss on Investments	The Company recognized expenses relating to the Cherry Creek acquisition of $806,344 for the three months ended March 31, 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 (in thousands):
	Fair value of assets and liabilities acquired	$	56,833
	Less existing mortgage in Cherry Creek		(36,000	)
			20,833
	Less cash paid to seller		(12,021	)
	Fair value of 42.3% equity interest		8,812
	Carrying value of investment in Cherry Creek		(4,337	)
	Gain on existing 42.3% equity interest	$	4,475
Logan Tower [Member]
Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table summarizes the Company’s allocation of the purchase price of assets acquired and liabilities assumed during the period ended March 31, 2015 (in thousands):
		Logan Tower
	Land	$	1,306
	Buildings and improvements		7,844
	Tenant improvements		353
	Acquired intangible assets		1,274
	Accounts payable and other liabilities		(48	)
	Lease intangible liabilities		(306	)
	Total consideration	$	10,423
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 (in thousands).
		Period from date of
		acquisition on February 4,
		2015 to March 31, 2015
	Operating revenues	$	243
	Operating expenses		(417	)
	Interest		—
		$	(174	)
Schedule of Business Acquisition Pro Forma Results of Operations	The following table presents the unaudited revenues and income from continuing operations for Logan Tower on a pro forma basis as if the Company had completed the acquisition of the properties as of January 1, 2014 (in thousands):
		Three Months			Three Months
		Ended March 31,			Ended March 31,
		2015			2014
	Total revenues as reported by City Office REIT, Inc. and Predecessor	$	11,259		$	7,982
	Plus: Logan Tower		148			391
	Pro forma total revenues	$	11,407		$	8,373
	Total operating income as reported by the City Office REIT, Inc. and Predecessor	$	1,379		$	890
	Property acquisition costs		100			(100	)
	Plus: Logan Tower		(106	)		(279	)
	Pro forma operating income	$	1,373		$	511

Lease_Intangibles_Tables

Lease Intangibles (Tables)	3 Months Ended
	Mar. 31, 2015
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 March 31, 2015 and December 31, 2014 were comprised as follows (in thousands):
	March 31, 2015	Above			In Place			Leasing			Total			Below			Below			Total
		Market			Leases			Commissions						Market			Market
		Leases												Leases			Ground
																	Lease
	Cost	$	4,762			29,512			13,103			47,377			(1,052	)		(138	)		(1,190	)
	Accumulated amortization		(2,170	)		(12,360	)		(4,178	)		(18,708	)		314			21			335
		$	2,592			17,152			8,925			28,669			(738	)		(117	)		(855	)
	December 31, 2014	Above			In Place			Leasing			Total			Below			Below			Total
		Market			Leases			Commissions						Market			Market
		Leases												Leases			Ground
																	Lease
	Cost	$	4,762			28,505			12,926			46,193			(746	)		(138	)		(884	)
	Accumulated amortization		(1,985	)		(11,159	)		(3,658	)		(16,802	)		258			20			278
		$	2,777			17,346			9,268			29,391			(488	)		(118	)		(606	)
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 (in thousands):
	2015	$	5,548
	2016		6,932
	2017		4,334
	2018		2,838
	2019		2,625
	Thereafter		5,537
		$	27,814

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Summary of Secured Indebtedness	The following table summarizes the secured indebtedness as of March 31, 2015 and December 31, 2014 (in thousands):
	Property		March 31,		December 31,		Interest Rate as			Maturity
			2015		2014		of March 31,
							2015
	Revolving Credit Facility (1)		$	—	$	—		LIBOR +2.75	%(2)	April 2016
	AmberGlen Mortgage Loan (3)			25,053		25,158		4.38		May-19
	Midland Life Insurance (4)			95,000		95,000		4.34		May-21
	Lake Vista Pointe (5)			18,460		18,460		4.28		Aug-24
	Florida Research Park (5)(6)			17,000		17,000		4.44		Dec-24
	Washington Group Plaza (5)			34,156		34,322		3.85		Jul-18
	Total		$	189,669	$	189,940
	All interest rates are fixed interest rates with the exception of the revolving credit facility (“Revolving Credit Facility”) as explained in footnote 1 below.
	-1	The Revolving Credit Facility currently has $30 million authorized and available. In addition, the Revolving Credit Facility has an accordion feature that will permit the Company to borrow up to $150 million, subject to additional collateral availability and lender approval. The Company shall have the right and option to extend the Revolving Credit Facility to April 21, 2017 subject to satisfaction of certain conditions. The Revolving Credit Facility requires the Company to maintain a fixed charge coverage ratio of no less than 1.60x. At March 31, 2015, the Revolving Credit Facility is cross-collateralized by Central Fairwinds, Plaza 25 and Logan Tower.
	-2	As of March 31, 2015, the one month LIBOR rate was 0.18%.
	-3	We are required to maintain a minimum net worth of $25 million and a minimum liquidity of $2 million.
	-4	The mortgage loan is cross-collateralized by Corporate Parkway, Cherry Creek and City Center. Interest only until June 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 on mortgage loan is payable monthly plus principal based on 360 months of amortization.
	-6	The Company is required to maintain a minimum net worth of $17 million, minimum liquidity of $1.7 million and a debt service coverage ratio of no less than 1.15x.
Schedule of Principal Repayments of Mortgage Payable	The scheduled principal repayments of mortgage payable as of March 31, 2015 are as follows (in thousands):
	2015		$	811
	2016			2,034
	2017			2,918
	2018			34,783
	2019			25,414
	Thereafter			123,709
	Total		$	189,669

Future_Minimum_Rent_Schedule_T

Future Minimum Rent Schedule (Tables)	3 Months Ended
	Mar. 31, 2015
Leases [Abstract]
Schedule of Future Minimum Lease Payments under Noncancellable Operating Leases	Future minimum lease payments to be received as of March 31, 2015 under noncancellable operating leases for the next five years and thereafter are as follows (in thousands):
	2015	$	29,358
	2016		32,941
	2017		26,692
	2018		22,708
	2019		17,868
	Thereafter		62,037
		$	191,604

Organization_and_Description_o1

Organization and Description of Business - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended
	Apr. 21, 2014	Mar. 31, 2015	9-May-14
		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
IPO Closed date		21-Apr-14
Gross proceeds from issuance of public offering	$72,500,000
Net proceeds from issuance of public offering	63,400,000	63,400,000
Underwriting discounts	5,100,000
Other expenses relating to IPO	4,000,000
Purchase consideration, cash paid	19,400,000
Number of properties in which loan refinanced	3
Overallotment Option [Member]
Business Description And Basis Of Presentation [Line Items]
Common stock issued in IPO, shares			782,150
Gross proceeds from issuance of public offering			9,800,000
Net proceeds from issuance of public offering			9,100,000
Underwriting discounts			700,000
Overallotment Option [Member] | Second City Group [Member]
Business Description And Basis Of Presentation [Line Items]
Common units and common stock redemption value, in cash			9,100,000
City Office REIT Operating Partnership, L.P. [Member] | Washington Group Plaza [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	100.00%
City Office REIT Operating Partnership, L.P. [Member] | Cherry Creek [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	100.00%
City Office REIT Operating Partnership, L.P. [Member] | Corporate Parkway [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	100.00%
City Office REIT Operating Partnership, L.P. [Member] | AmberGlen [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	76.00%
City Office REIT Operating Partnership, L.P. [Member] | Central Fairwinds [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	90.00%
City Office REIT Operating Partnership, L.P. [Member] | City Center Property [Member]
Business Description And Basis Of Presentation [Line Items]
Percent of ownership interest acquired in properties	95.00%
Non-Recourse Mortgage Loan [Member]
Business Description And Basis Of Presentation [Line Items]
Non-recourse mortgage loan, amount	$95,000,000
Non-recourse mortgage loan, interest rate	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
Common Units [Member] | Overallotment Option [Member] | Second City Group [Member]
Business Description And Basis Of Presentation [Line Items]
Previously issued number of redeemable shares			479,305
Common Stock [Member]
Business Description And Basis Of Presentation [Line Items]
Purchase consideration, units issued	1,858,860
Common Stock [Member] | Overallotment Option [Member] | Second City Group [Member]
Business Description And Basis Of Presentation [Line Items]
Previously issued number of redeemable shares			248,095

Real_Estate_Investments_Schedu

Real Estate Investments - Schedule of Acquired Properties (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Feb. 04, 2015	Jan. 02, 2014
Logan Tower [Member]
Business Acquisition [Line Items]
Real estate property, date acquired	2015-02
Real estate property, percentage owned	100.00%		100.00%
Predecessor [Member] | Cherry Creek [Member]
Business Acquisition [Line Items]
Real estate property, date acquired		2014-01
Real estate property, percentage owned		100.00%		57.70%

Real_Estate_Investments_Additi

Real Estate Investments - Additional Information (Detail) (USD $)	0 Months Ended			3 Months Ended
	Apr. 21, 2014	Feb. 04, 2015	Jan. 02, 2014	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Business acquisition, purchase consideration	$19,400,000
Business acquisition, deferred financing costs					2,731,000	2,901,000
Logan Tower [Member]
Business Acquisition [Line Items]
Business acquisition, ownership percentage		100.00%			100.00%
Business acquisition, purchase consideration		10,400,000
Predecessor [Member] | Cherry Creek [Member]
Business Acquisition [Line Items]
Business acquisition, ownership percentage			57.70%	100.00%
Business acquisition, purchase consideration			12,000,000	12,021,000
Business acquisition, liabilities assumed			50,000,000
Repayment of debt			36,000,000	36,000,000
Business acquisition, deferred financing costs			1,200,000
Business acquisition, transaction costs			800,000
Expenses related to acquisition				806,344
Gain on equity investment				$4,475,000

Real_Estate_Investments_Schedu1

Real Estate Investments - Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Mar. 31, 2014	Mar. 31, 2015
In Thousands, unless otherwise specified
Cherry Creek [Member]
Business Acquisition [Line Items]
Land	$25,745
Buildings and improvements	15,771
Tenant improvements	4,372
Acquired intangible assets	12,009
Accounts payable and other liabilities	-815
Lease intangible liabilities	-249
Fair value of assets and liabilities at acquisition	56,833
Logan Tower [Member]
Business Acquisition [Line Items]
Land		1,306
Buildings and improvements		7,844
Tenant improvements		353
Acquired intangible assets		1,274
Accounts payable and other liabilities		-48
Lease intangible liabilities		-306
Fair value of assets and liabilities at acquisition		$10,423

Real_Estate_Investments_Schedu2

Real Estate Investments - Schedule of Realized Gain Loss on Investments (Detail) (USD $)	0 Months Ended		3 Months Ended
In Thousands, unless otherwise specified	Apr. 21, 2014	Jan. 02, 2014	Mar. 31, 2014
Business Acquisition [Line Items]
Less cash paid to seller	($19,400)
Cherry Creek [Member]
Business Acquisition [Line Items]
Fair value of assets and liabilities acquired			56,833
Predecessor [Member] | Cherry Creek [Member]
Business Acquisition [Line Items]
Fair value of assets and liabilities acquired			56,833
Less existing mortgage in Cherry Creek		-36,000	-36,000
Fair value of assets and liabilities acquired, after mortgage			20,833
Less cash paid to seller		-12,000	-12,021
Fair value of 42.3% equity interest			8,812
Carrying value of investment in Cherry Creek			-4,337
Gain on existing 42.3% equity interest			$4,475

Real_Estate_Investments_Schedu3

Real Estate Investments - Schedule of Realized Gain Loss on Investments (Parenthetical) (Detail) (Predecessor [Member], Cherry Creek [Member])	Mar. 31, 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	2 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2015
Business Acquisition [Line Items]
Operating revenues	$10,040
Operating expenses	-4,116
Logan Tower [Member]
Business Acquisition [Line Items]
Operating revenues		243
Operating expenses		-417
Interest		0
Total		($174)

Real_Estate_Investments_Schedu5

Real Estate Investments - Schedule of Business Acquisition Pro Forma Results of Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Business Acquisition [Line Items]
Total revenues as reported by City Office REIT, Inc. and Predecessor	$11,259
Pro forma total revenues	11,407
Total operating income as reported by the City Office REIT, Inc. and Predecessor	1,379
Property acquisition costs	100
Pro forma operating income	1,373
Logan Tower [Member]
Business Acquisition [Line Items]
Pro forma total revenues	148
Pro forma operating income	-106
Predecessor [Member]
Business Acquisition [Line Items]
Total revenues as reported by City Office REIT, Inc. and Predecessor		7,982
Pro forma total revenues		8,373
Total operating income as reported by the City Office REIT, Inc. and Predecessor		890
Property acquisition costs		-100
Pro forma operating income		511
Predecessor [Member] | Logan Tower [Member]
Business Acquisition [Line Items]
Pro forma total revenues		391
Pro forma operating income		($279)

Lease_Intangibles_Schedule_of_

Lease Intangibles - Schedule of Lease Intangibles and Value of Assumed Lease Obligations (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Total	$28,669	$29,391
Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	4,762	4,762
Accumulated amortization	-2,170	-1,985
Total	2,592	2,777
In Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	29,512	28,505
Accumulated amortization	-12,360	-11,159
Total	17,152	17,346
Leasing Commissions [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	13,103	12,926
Accumulated amortization	-4,178	-3,658
Total	8,925	9,268
Above Market and In Place Leases and Leasing Commissions [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	47,377	46,193
Accumulated amortization	-18,708	-16,802
Total	28,669	29,391
Below Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	-1,052	-746
Accumulated amortization	314	258
Total	-738	-488
Below Market Ground Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	-138	-138
Accumulated amortization	21	20
Total	-117	-118
Total of Below Market and Below Market Ground Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	-1,190	-884
Accumulated amortization	335	278
Total	($855)	($606)

Lease_Intangibles_Estimated_Ag

Lease Intangibles - Estimated Aggregate Amortization Expense for Lease Intangibles (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$5,548
2016	6,932
2017	4,334
2018	2,838
2019	2,625
Thereafter	5,537
Total	$27,814

Debt_Summary_of_Secured_Indebt

Debt - Summary of Secured Indebtedness (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Secured indebtedness	$189,669	$189,940
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest Rate, Description	LIBOR +2.75 %
Maturity	2016-04
Midland Life Insurance [Member]
Debt Instrument [Line Items]
Secured indebtedness	95,000	95,000
Interest Rate	4.34%
Maturity	2021-05
Lake Vista Pointe [Member]
Debt Instrument [Line Items]
Secured indebtedness	18,460	18,460
Interest Rate	4.28%
Maturity	2024-08
Florida Research Park [Member]
Debt Instrument [Line Items]
Secured indebtedness	17,000	17,000
Interest Rate	4.44%
Maturity	2024-12
Washington Group Plaza [Member]
Debt Instrument [Line Items]
Secured indebtedness	34,156	34,322
Interest Rate	3.85%
Maturity	2018-07
AmberGlen Mortgage Loan [Member]
Debt Instrument [Line Items]
Secured indebtedness	$25,053	$25,158
Interest Rate	4.38%
Maturity	2019-05

Debt_Summary_of_Secured_Indebt1

Debt - Summary of Secured Indebtedness (Parenthetical) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Midland Life Insurance [Member]
Debt Instrument [Line Items]
Amortization period	360 months
Effective interest rate of loan	4.34%
Loan maturity date	6-May-21
Lake Vista Pointe [Member]
Debt Instrument [Line Items]
Amortization period	360 months
Effective interest rate of loan	4.28%
Florida Research Park [Member]
Debt Instrument [Line Items]
Minimum net worth required	17,000,000
Amortization period	360 months
Effective interest rate of loan	4.44%
Minimum liquidity requirements	1,700,000
Washington Group Plaza [Member]
Debt Instrument [Line Items]
Amortization period	360 months
Effective interest rate of loan	3.85%
AmberGlen Mortgage Loan [Member]
Debt Instrument [Line Items]
Minimum net worth required	25,000,000
Minimum liquidity requirements	2,000,000
Effective interest rate of loan	4.38%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, authorized amount	30,000,000
Revolving Credit Facility, current borrowing capacity	30,000,000
Revolving Credit Facility, accordion feature	150,000,000
Option to extend the line of credit facility date	21-Apr-17
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
One month LIBOR rate	0.18%
Minimum [Member] | Florida Research Park [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.15
Minimum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.6

Debt_Schedule_of_Principal_Rep

Debt - Schedule of Principal Repayments of Mortgage Payable (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
2015	$811
2016	2,034
2017	2,918
2018	34,783
2019	25,414
Thereafter	123,709
Total principal repayments of mortgage payable	$189,669	$189,940

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Jul. 31, 2016	Dec. 31, 2014
	sqft
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value, discount rate	8.00%
Approximate square feet of additional lease space	14,000
Percentage of lease space occupancy	74.00%
Average net effective rent per square foot	14
Incremental operating costs per square foot	4
Estimated fair value of earn-out liability	$8,000,000		$8,000,000
Change in fair value of earn-out	0
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	100,000
Potential gain by varying the significant unobservable inputs	100,000
Mortgage loans payable, fair value	$195,100,000		$192,500,000
Scenario, Forecast [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of lease space occupancy		80.00%

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended
	Apr. 21, 2014	Mar. 31, 2015	9-May-14	Dec. 23, 2014	Dec. 31, 2014
Related Party Transaction [Line Items]
Shares issued to underwriters under overallotment option	5,800,000	5,800,000
Common stock price per share		$0.01			$0.01
Net proceeds from issuance of public offering	$63,400,000	$63,400,000
Property Management Firm [Member]
Related Party Transaction [Line Items]
Property management fee, Description		Fee ranging from 1.75% to 3.5% of gross revenue
Overallotment Option [Member]
Related Party Transaction [Line Items]
Shares issued to underwriters under overallotment option			782,150
Net proceeds from issuance of public offering			9,100,000
Secondary Public Offering, Over Allotment Option [Member]
Related Party Transaction [Line Items]
Shares issued to underwriters under overallotment option				512,664
Common stock price per share				$12.50
Net proceeds from issuance of public offering				6,100,000
Washington Group Plaza [Member] | Property Manager [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%
Minimum property management fee		5,600,000
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.
Washington Group Plaza [Member] | 2013 [Member] | Property Manager [Member]
Related Party Transaction [Line Items]
Minimum property management fee		5,000,000
Washington Group Plaza [Member] | 2014 [Member] | Property Manager [Member]
Related Party Transaction [Line Items]
Minimum property management fee		5,450,000
Second City Group [Member]
Related Party Transaction [Line Items]
Formation transactions completed date		21-Apr-14
Consideration for formation transactions		19,400,000
Additional payments to Second City reimbursement of IPO		4,900,000
Additional payments to the Second City Group for working capital		1,800,000
Second City Group [Member] | Overallotment Option [Member]
Related Party Transaction [Line Items]
Common stock redemption value, in cash			9,100,000
Second City Group [Member] | Overallotment Option [Member] | Common Units [Member]
Related Party Transaction [Line Items]
Previously issued number of redeemable shares			479,305
Second City Group [Member] | Overallotment Option [Member] | Common Stock [Member]
Related Party Transaction [Line Items]
Previously issued number of redeemable shares			248,095
Second City Group [Member] | Secondary Public Offering, Over Allotment Option [Member]
Related Party Transaction [Line Items]
Common stock redemption value, in cash				6.1
Shares issued to underwriters under overallotment option				512,664
Net proceeds from issuance of public offering				$6.10
Second City Group [Member] | Secondary Public Offering, Over Allotment Option [Member] | Common Units [Member]
Related Party Transaction [Line Items]
Previously issued number of redeemable shares				336,195
Second City Group [Member] | Secondary Public Offering, Over Allotment Option [Member] | Common Stock [Member]
Related Party Transaction [Line Items]
Previously issued number of redeemable shares				176,469
Minimum [Member] | Property Management Firm [Member]
Related Party Transaction [Line Items]
Property management fee, percentage		1.75%
Maximum [Member] | Property Management Firm [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 $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Leases [Abstract]
2015	$29,358
2016	32,941
2017	26,692
2018	22,708
2019	17,868
Thereafter	62,037
Total future minimum lease payments to be received	$191,604

Future_Minimum_Rent_Schedule_A

Future Minimum Rent Schedule - Additional Information (Detail) (Sales Revenue, Services, Net [Member], Government Contracts Concentration Risk [Member])	0 Months Ended
	Mar. 31, 2015
Sales Revenue, Services, Net [Member] | Government Contracts Concentration Risk [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Percentage of total future minimum lease payments	40.70%

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Other Commitments [Line Items]
Estimated fair value of earn-out liability	$8,000,000	$8,000,000
Change in fair value of earn-out	$0
Central Fairwinds [Member]
Other Commitments [Line Items]
Percentage of leased area	74.10%
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.
Central Fairwinds [Member] | Range 1 [Member]
Other Commitments [Line Items]
Percentage of Earn-Out Threshold	70.00%
Central Fairwinds [Member] | Range 2 [Member]
Other Commitments [Line Items]
Percentage of Earn-Out Threshold	80.00%
Central Fairwinds [Member] | Range 3 [Member]
Other Commitments [Line Items]
Percentage of Earn-Out Threshold	90.00%

Stockholders_Equity_Additional

Stockholder's Equity - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended	0 Months Ended
	Mar. 19, 2015	Apr. 21, 2014	Mar. 31, 2015	9-May-14	Dec. 10, 2014	Dec. 23, 2014	Dec. 31, 2014
Class of Stock [Line Items]
Common stock issued in IPO, shares		5,800,000	5,800,000
Net proceeds from IPO		$63,400,000	$63,400,000
Common stock issued			12,279,110				12,279,110
Common stock price per share			$0.01				$0.01
Gross proceeds from issuance of public offering		72,500,000
Underwriting discounts		5,100,000
Other expenses relating to secondary public offering		4,000,000
Operating Partnership common units			2,915,709
Percentage of interest in Operating Partnership			19.20%
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.
Declared cash dividend distribution per share	$0.24		$0.24
Dividends payable, declared date			19-Mar-15
Dividends payable date			17-Apr-15
Dividends payable, date of record			3-Apr-15
Dividends			3,571,000
Maximum number of shares issued under Equity Incentive Plan			1,263,580
Common Units [Member]
Class of Stock [Line Items]
Dividends			700,000
Common Stock [Member]
Class of Stock [Line Items]
Dividends			2,900,000
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Net compensation expense			400,000
Number of annual installments for award vesting			3
Restricted Stock Units (RSUs) [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Restricted stock units, vested in period			125,620
Restricted Stock Units (RSUs) [Member] | Directors and Non-Executive Employees [Member]
Class of Stock [Line Items]
Restricted stock units granted to directors and non-executive employees of the Advisor			50,864
Restricted stock units grant date fair value			400,000
Overallotment Option [Member]
Class of Stock [Line Items]
Common stock issued in IPO, shares				782,150
Net proceeds from IPO				9,100,000
Gross proceeds from issuance of public offering				9,800,000
Underwriting discounts				700,000
Overallotment Option [Member] | Second City Group [Member] | Common Units [Member]
Class of Stock [Line Items]
Previously issued number of redeemable shares				479,305
Overallotment Option [Member] | Second City Group [Member] | Common Stock [Member]
Class of Stock [Line Items]
Previously issued number of redeemable shares				248,095
Follow-on Public Offering [Member]
Class of Stock [Line Items]
Net proceeds from IPO					43,700,000
Common stock issued					3,750,000
Common stock price per share					$12.50
Gross proceeds from issuance of public offering					46,900,000
Underwriting discounts					2,600,000
Other expenses relating to secondary public offering					600,000
Secondary Public Offering, Over Allotment Option [Member]
Class of Stock [Line Items]
Common stock issued in IPO, shares						512,664
Net proceeds from IPO						6,100,000
Common stock price per share						$12.50
Gross proceeds from issuance of public offering						6,400,000
Underwriting discounts						300,000
Secondary Public Offering, Over Allotment Option [Member] | Second City Group [Member]
Class of Stock [Line Items]
Common stock issued in IPO, shares						512,664
Net proceeds from IPO						$6.10
Secondary Public Offering, Over Allotment Option [Member] | Second City Group [Member] | Common Units [Member]
Class of Stock [Line Items]
Previously issued number of redeemable shares						336,195
Secondary Public Offering, Over Allotment Option [Member] | Second City Group [Member] | Common Stock [Member]
Class of Stock [Line Items]
Previously issued number of redeemable shares						176,469

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Apr. 20, 2015
In Thousands, unless otherwise specified
Subsequent Event [Line Items]
Acquired property under agreement of purchase and sale	$219,404	$211,828
Subsequent Event [Member] | Denver Colorado Property [Member]
Subsequent Event [Line Items]
Acquired property under agreement of purchase and sale			$25,800