City Office REIT (CIO) 10-K 27 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 21, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	CIO
Entity Registrant Name	City Office REIT, Inc.
Entity Central Index Key	1,593,222
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		39,544,705
Entity Public Float			$ 455

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real estate properties
Land	$ 223,789	$ 188,110
Building and improvement	704,113	534,473
Tenant improvement	77,426	53,427
Furniture, fixtures and equipment	319	291
Real estate properties, gross	1,005,647	776,301
Accumulated depreciation	(70,484)	(48,234)
Real estate properties, net	935,163	728,067
Cash and cash equivalents	16,138	12,301
Restricted cash	17,007	22,713
Rents receivable, net	26,095	20,087
Deferred leasing costs, net	10,402	7,793
Acquired lease intangible assets, net	75,501	65,088
Prepaid expenses and other assets	2,755	2,013
Assets held for sale	17,370	38,427
Total Assets	1,100,431	896,489
Liabilities:
Debt	645,354	489,509
Accounts payable and accrued liabilities	25,892	17,605
Deferred rent	5,331	4,223
Tenant rent deposits	4,564	3,523
Acquired lease intangible liabilities, net	8,887	8,649
Dividend distributions payable	11,148	10,318
Liabilities related to assets held for sale	878	2,830
Total Liabilities	702,054	536,657
Commitments and Contingencies (Note 10)
Equity:
6.625% Series A Preferred stock, $0.01 par value per share, 5,600,000 shares authorized, 4,480,000 issued and outstanding as of December 31, 2018 and 2017 respectively	112,000	112,000
Common stock, $0.01 par value, 100,000,000 shares authorized, 39,544,073 and 36,012,086 shares issued and outstanding as of December 31, 2018 and 2017 respectively	395	360
Additional paid-in capital	377,126	334,241
Accumulated deficit	(92,108)	(86,977)
Total Stockholders' Equity	397,413	359,624
Non-controlling interests in properties	964	208
Total Equity	398,377	359,832
Total Liabilities and Equity	$ 1,100,431	$ 896,489

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, Dividend rate percentage	6.625%	6.625%
Preferred stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,600,000	5,600,000
Preferred stock, shares issued	4,480,000	4,480,000
Preferred stock, shares outstanding	4,480,000	4,480,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	39,544,073	36,012,086
Common stock, shares outstanding	39,544,073	36,012,086

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Rental income	$ 110,076	$ 92,357	$ 63,702
Expense reimbursement	15,906	11,164	7,140
Other	3,502	2,966	1,619
Total Revenues	129,484	106,487	72,461
Operating Expenses:
Property operating expenses	49,872	42,886	28,305
General and administrative	8,137	6,792	6,429
Base management fee			109
External advisor acquisition			7,045
Acquisition costs			692
Depreciation and amortization	52,352	41,594	30,178
Impairment of real estate	3,497
Total Operating Expenses	113,858	91,272	72,758
Operating income/(loss)	15,626	15,215	(297)
Interest Expense:
Contractual interest expense	(22,316)	(18,721)	(13,804)
Amortization of deferred financing costs	(1,621)	(1,452)	(957)
Interest expense, net	(23,937)	(20,173)	(14,761)
Change in fair value of earn-out			(500)
Change in fair value of contingent consideration		2,000
Net gain on sale of real estate property	46,980	12,116	15,934
Net income	38,669	9,158	376
Net income attributable to non-controlling interests in properties	(501)	(3,402)	(354)
Net income attributable to Operating Partnership unitholders' non-controlling interests			(865)
Net income/(loss) attributable to the Company	38,168	5,756	(843)
Preferred stock distributions	(7,420)	(7,411)	(1,781)
Net income/(loss) attributable to common stockholders	$ 30,748	$ (1,655)	$ (2,624)
Net income/(loss) per common share and unit:
Basic	$ 0.82	$ (0.05)	$ (0.13)
Diluted	$ 0.82	$ (0.05)	$ (0.13)
Weighted average common shares outstanding:
Basic	37,321	30,198	20,460
Diluted	37,670	30,198	20,460
Dividend distributions declared per common share and unit	$ 0.940	$ 0.940	$ 0.940

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	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]
Beginning balance at Dec. 31, 2015	$ 73,720		$ 125	$ 95,318	$ (29,598)	$ 65,845	$ 8,550	$ (675)
Beginning balance, shares at Dec. 31, 2015			12,518,000
Conversion of OP units to shares, values			$ 32	10,754		10,786	(10,786)
Conversion of OP units to shares, shares			3,206,000
Restricted stock award grants and vesting, values	2,436		$ 2	2,434		2,436
Restricted stock award grants and vesting, shares			164,000
Internalization payment in shares, values	3,464		$ 3	3,461		3,464
Internalization payment in shares, shares			297,000
Earn out payment in shares, values	3,778		$ 2	767		769	3,009
Earn out payment in shares, shares			147,000
Net proceeds from sale of common stock, values	86,785		$ 80	86,705		86,785
Net proceeds from sale of common stock, shares			8,050,000
Net proceeds from sale of preferred stock, values	108,127	$ 112,000		(3,873)		108,127
Net proceeds from sale of preferred stock, shares		4,480,000
Common stock dividend distributions declared	(22,916)				(21,386)	(21,386)	(1,530)
Preferred stock dividend distributions declared	(1,781)				(1,781)	(1,781)
Contributions	2,525							2,525
Distributions	(455)							(455)
Net (loss)/income	376				(843)	(843)	865	354
Ending balance at Dec. 31, 2016	256,059	$ 112,000	$ 244	195,566	(53,608)	254,202	108	1,749
Ending balance, shares at Dec. 31, 2016		4,480,000	24,382,000
Conversion of OP units to shares, values				108		108	$ (108)
Conversion of OP units to shares, shares			40,000
Restricted stock award grants and vesting, values	1,671		$ 1	1,741	(71)	1,671
Restricted stock award grants and vesting, shares			90,000
Net proceeds from sale of common stock, values	136,941		$ 115	136,826		136,941
Net proceeds from sale of common stock, shares			11,500,000
Common stock dividend distributions declared	(31,148)				(31,148)	(31,148)
Preferred stock dividend distributions declared	(7,906)				(7,906)	(7,906)
Distributions	(4,943)							(4,943)
Net (loss)/income	9,158				5,756	5,756		3,402
Ending balance at Dec. 31, 2017	$ 359,832	$ 112,000	$ 360	334,241	(86,977)	359,624		208
Ending balance, shares at Dec. 31, 2017	36,012,086	4,480,000	36,012,000
Restricted stock award grants and vesting, values	$ 1,330		$ 1	1,641	(312)	1,330
Restricted stock award grants and vesting, shares			121,000
Net proceeds from sale of common stock, values	42,902		$ 34	42,868		42,902
Net proceeds from sale of common stock, shares			3,411,000
Common stock dividend distributions declared	(35,567)				(35,567)	(35,567)
Preferred stock dividend distributions declared	(7,420)				(7,420)	(7,420)
Minority interest buyout	(1,139)			(1,624)		(1,624)		485
Contributions	297							297
Distributions	(527)							(527)
Net (loss)/income	38,669				38,168	38,168		501
Ending balance at Dec. 31, 2018	$ 398,377	$ 112,000	$ 395	$ 377,126	$ (92,108)	$ 397,413		$ 964
Ending balance, shares at Dec. 31, 2018	39,544,073	4,480,000	39,544,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 38,669	$ 9,158	$ 376
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	52,352	41,594	30,178
Amortization of deferred financing costs	1,621	1,452	957
Amortization of above/below market leases	(182)	(337)	299
Increase in straight-line rent	(4,703)	(2,820)	(3,751)
Non-cash stock compensation	1,416	1,671	2,436
Earn-out termination payment		(2,400)	500
Internalization shares issued			3,464
Net gain on sale of real estate property	(46,980)	(12,116)	(15,934)
Impairment of real estate	3,497
Changes in non-cash working capital:
Rents receivable, net	(1,602)	(1,647)	(4,331)
Prepaid expenses and other assets	(353)	349	(587)
Accounts payable and accrued liabilities	(910)	670	3,135
Deferred rent	(834)	324	2,743
Tenant rent deposits	196	655	(338)
Net Cash Provided By Operating Activities	42,187	36,553	19,147
Cash Flows to Investing Activities:
Additions to real estate properties	(23,586)	(8,189)	(8,729)
Acquisition of real estate	(254,514)	(249,299)	(248,957)
Net proceeds from sale of real estate	84,839	18,479	43,525
Deferred leasing costs	(4,048)	(4,289)	(2,074)
Net Cash Used In Investing Activities	(197,309)	(243,298)	(216,235)
Cash Flows from Financing Activities:
Net proceeds from sale of preferred stock			108,127
Net proceeds from sale of common stock	42,902	136,941	86,785
Debt issuance and extinguishment costs	(2,963)	(3,202)	(2,955)
Proceeds from mortgage loans payable	95,749	166,340	47,938
Repayment of mortgage loans payable	(52,820)	(27,772)	(20,199)
Proceeds from credit facility	303,000	226,000	95,500
Repayment of credit facility	(189,000)	(245,000)	(93,000)
Shares withheld for payment of taxes on restricted stock unit vesting	(87)
Minority interest buyout	(1,140)
Contributions from non-controlling interests in properties	297		2,525
Distributions to non-controlling interests in properties	(527)	(4,943)	(455)
Dividend distributions paid to stockholders and Operating Partnership unitholders	(42,158)	(36,256)	(20,841)
Net Cash Provided By Financing Activities	153,253	212,108	203,425
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(1,869)	5,363	6,337
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	35,014	29,651	23,314
Cash, Cash Equivalents and Restricted Cash, End of Period	33,145	35,014	29,651
Reconciliation of Cash, Cash Equivalents and Restricted Cash:
Cash and Cash Equivalents, End of Period	16,138	12,301	13,703
Restricted Cash, End of Period	17,007	22,713	15,948
Cash, Cash Equivalents and Restricted Cash, End of Period	33,145	35,014	29,651
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	22,131	18,408	13,621
Earn-out payment in common stock			3,778
Purchases of additions in real estate properties included in accounts payable	6,791	2,616	1,565
Purchases of deferred leasing costs included in accounts payable	$ 654	$ 815	$ 19

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [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 of limited partnership interest in the Operating Partnership (“common units”). 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 Operating Partnership’s partnership agreement to manage and conduct the Operating Partnership’s business, subject to limited approval and voting rights of the limited partners. The Company has elected to be taxed and will continue to operate in a manner that will allow it to continue to qualify as a real estate investment trust (“REIT”) under the Internal Revenue Code of 1986, as amended (the “Code”). 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, for years prior to 2018, any applicable alternative minimum tax.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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 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 subsidiaries. All significant intercompany transactions and balances have been eliminated on consolidation. Use of Estimates The Company has made a number of significant estimates and assumptions relating to the reporting of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses to prepare these consolidated financial statements in conformity with GAAP. Significant estimates made include the recoverability of accounts receivable, allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed, the determination of impairment of long-lived assets and the useful lives of long-lived assets. These estimates and assumptions are based on our best estimates and judgment. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management adjusts such estimates when facts and circumstances dictate. Actual results could differ materially from those estimates. Cash and Cash Equivalents Cash and cash equivalents include unrestricted cash and short-term investments with a maturity date of less than three months when acquired. Restricted Cash Restricted cash consists of cash held in escrow by lenders pursuant to certain lender agreements and cash received from contracted building sales. Rent Receivable, Net The Company continuously monitors collections from tenants and makes a provision for estimated losses based upon historical experience and any specific tenant collection issues that the Company has identified. Business Combinations When a property is acquired, management considers the substance of the agreement in determining whether the acquisition represents an asset acquisition or a business combination. Upon acquisitions of properties that constitutes a business, the fair value of the real estate acquired, which includes the impact of fair value adjustments for assumed mortgage debt related to property acquisitions, is allocated to the acquired tangible assets, consisting of land, buildings and improvements and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, other value of in-place non-controlling The fair value of the tangible assets of an acquired property (which includes land, buildings and improvements and fixtures and equipment) is determined by valuing the property as if it were vacant. The “as-if-vacant” lease-up lease-up The fair value of above-market and below-market lease values are recorded based on the difference between the current in-place non-cancelable non-cancelable The fair value of acquired in-place lease-up in-place Revenue Recognition The Company recognizes lease revenue on a straight-line basis over the term of the lease. Certain leases allow for the tenant to terminate the lease, but the tenant must make a termination payment as stipulated in the lease. If the termination payment is in such an amount that continuation of the lease appears, at the time of lease inception, to be reasonably assured, then the Company recognizes revenue over the term of the lease. The Company has determined that for these leases, the termination payment is in such an amount that continuation of the lease appears, at the time of inception, to be reasonably assured. The Company recognizes lease termination fees as revenue in the period received and writes off unamortized lease-related intangible and other lease-related account balances, provided there are no further Company obligations under the lease. Otherwise, such fees and balances are recognized on a straight-line basis over the remaining obligation period with the termination payments being recorded as a component of rent receivable-deferred or deferred revenue on the consolidated balance sheets. If the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. If the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition when possession or control of the space is turned over to the tenant for tenant work to begin. The lease incentive is recorded as a deferred expense and amortized as a reduction of revenue on a straight-line basis over the respective lease term. Recoveries from tenants for real estate taxes, insurance and other operating expenses are recognized as revenues in the period that the applicable costs are incurred. The Company recognizes differences between estimated recoveries and the final billed amounts in the subsequent year. Final billings to tenants for real estate taxes, insurance and other operating expenses did not vary significantly as compared to the estimated receivable balances. Real Estate Properties Real estate properties are stated at cost less accumulated depreciation, except land. Depreciation is computed on the straight-line basis over estimated useful lives of: Years Buildings and improvement 29-50 Site improvement 4-23 Furniture, fixtures and equipment 4-7 Expenditures for maintenance and repairs are charged to operations as incurred. Impairment of Real Estate Properties Long-lived assets currently in use are reviewed periodically for possible impairment and will be written down to fair value if considered impaired. Long-lived assets, to be disposed of, are written down to the lower of cost or fair value less the estimated cost to sell. The Company reviews its real estate properties for impairment when there is an event or a change in circumstances that indicates that the carrying amount may not be recoverable. The Company measures and records impairment losses and reduces the carrying value of properties when indicators of impairment are present and the expected undiscounted cash flows related to those properties are less than their carrying amounts. In cases where the Company does not expect to recover its carrying costs on properties held for use, the Company reduces its carrying costs to fair value. Variable Interest Entities The Company consolidates variable interest entities (“VIE”) if the Company determines that it is the primary beneficiary of the entity. When evaluating the accounting for a VIE, the Company considers the purpose for which the VIE was created, the importance of each of the activities in which it is engaged and our decision-making role, if any, in those activities that significantly determine the entity’s economic performance relative to other economic interest holders. The Company determines the rights, if any, to receive benefits or the obligation to absorb losses that could potentially be significant to the VIE by considering the economic interest in the entity, regardless of form, which may include debt, equity, management and servicing fees, or other contractual arrangements. The Company considers other relevant factors including each entity’s capital structure, contractual rights to earnings (losses), subordination of the Company’s interests relative to those of other investors, contingent payments, and other contractual arrangements that may be economically significant. Concentration of Credit Risk The Company places its temporary cash investments in high credit financial institutions. However, a portion of temporary cash investments may exceed FDIC insured levels from time to time. The Company has never experienced any losses related to these balances. Income Taxes The Company has elected to be taxed, and intends to continue to operate in a manner that will allow it to continue to qualify, as a REIT. To qualify as a REIT, the Company is required to distribute dividends equal to at least 90% of its REIT taxable income (computed without regard to the deduction for dividends paid and excluding 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, for years prior to 2018, any applicable alternative minimum tax. In addition, the Company may not be able to re-elect Non-controlling The Company follows the provisions pertaining to non-controlling non-controlling non-controlling non-controlling 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. Earnings per Common Share The Company calculates net income per common share based upon the weighted average shares outstanding for the years ended December 31, 2018 and December 31, 2017 and December 31, 2016. Diluted earnings per share is calculated after giving effect to all potential dilutive shares outstanding during the period. Derivative Instruments and Hedging Activities The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. The Company has not elected to designate any instruments as a hedge. Fair Value of Financial Instruments ASC 820-10, 820-10”) Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. Deferred Leasing Costs Fees and costs paid in the successful negotiation of leases are deferred and amortized on a straight-line basis over the terms of the respective leases. Segment Reporting The Company operates in one industry segment, commercial real estate. New Accounting Pronouncements Adopted in the Current Year Effective January 1, 2018, the Company adopted FASB ASU 2014-09, 2016-02, 2017-05, Effective January 1, 2018, the Company adopted FASB ASU 2016-01, 2016-01 Effective January 1, 2018, the Company adopted FASB ASU 2016-15, Effective January 1, 2018, the Company adopted FASB ASU 2016-18, To be Adopted in Future Years In February 2016, the FASB established Topic 842, Leases, by issuing Accounting Standards Update No. 2016-02, on-balance No. 2018-01, No. 2018-10, No. 2018-11, • Transition method practical expedient—permits the Company to use the effective date as the date of initial application. Consequently, financial information and disclosures for periods before January 1, 2019 will not be updated. • Package of practical expedients—permits the Company not to reassess under the new standard its prior conclusions about lease identification, lease classification, and initial direct costs. • Single component practical expedient—permits the Company to not separate lease and non-lease • Short-term lease practical expedient—for operating leases with a term equal to or less than 12 months, permits the Company to not recognize right-of-use (“ROU”) assets or lease liabilities. The Company does not expect to elect the use-of-hindsight Lessor Accounting The accounting for lessors will remain largely unchanged from current GAAP; however, the standard requires that certain initial direct costs be expensed rather than capitalized. While the new standard identifies common area maintenance as a non-lease While the Company does not anticipate any material change to the accounting for leases under which it is a lessor, the Company continues to evaluate the impact this ASU will have on the accounting for its leasing arrangements as well as its disclosures within the notes of the financial statements. Lessee Accounting The new standard requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. While the Company continues to assess all of the effects of adoption, the Company currently believe the most significant effects relate to (1) the recognition of new ROU assets and lease liabilities on the balance sheet for its ground operating leases, real estate operating leases, and office/equipment operating leases; and (2) providing significant new disclosures about its leasing activities. On adoption, the Company will recognize additional ROU assets and lease liabilities for operating leases in an amount not expected to exceed $12 million.

Rents Receivable, Net

Rents Receivable, Net	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Rents Receivable, Net	3. Rents Receivable, Net The Company’s rents receivable is comprised of the following components (in thousands): December 31, 2018 December 31, 2017 Billed receivables $ 2,383 $ 1,905 Straight-line receivables 23,712 18,182 Total rents receivable $ 26,095 $ 20,087 As of December 31, 2018, and 2017, the Company’s allowance for doubtful accounts was not significant.

Real Estate Investments

Real Estate Investments	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Real Estate Investments	4. Real Estate Investments Acquisitions During the years ended December 31, 2018, December 31, 2017 and December 31, 2016 the Company acquired the following properties: Property Date Acquired Percentage Owned Camelback Square December 2018 100 % Greenwood Blvd December 2018 100 % Circle Point Land December 2018 100 % The Quad July 2018 100 % Circle Point July 2018 100 % Pima Center April 2018 100 % Papago Tech October 2017 100 % Mission City and Sorrento Mesa September 2017 100 % 2525 McKinnon January 2017 100 % SanTan December 2016 100 % 5090 N 40th St November 2016 100 % Park Tower November 2016 95 % FRP Collection July 2016 95 % Carillon Point June 2016 100 % Camelback Square, Greenwood Blvd, Circle Point Land, The Quad, Circle Point, Pima Center, Papago Tech, Mission City, Sorrento Mesa, and 2525 McKinnon have been accounted for as asset acquisitions. SanTan, 5090 N 40th St, Park Tower, FRP Collection, and Carillon Point were accounted for as business combinations. The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2018 (in thousands): Pima Circle The Circle Point Greenwood Camelback Total December 31, Land $ — $ 8,744 $ 8,079 $ 4,937 $ 3,945 $ 11,738 $ 37,443 Buildings and improvements 42,235 33,708 38,060 — 23,741 35,532 173,276 Tenant improvements 2,898 5,393 1,798 — 2,278 2,390 14,757 Acquired intangible assets 10,691 10,299 4,209 — 4,578 4,304 34,081 Prepaid expenses and other assets 95 25 15 — 15 10 160 Accounts payable and other liabilities (337 ) (1,157 ) (527 ) (72 ) (96 ) (421 ) (2,610 ) Lease intangible liabilities (129 ) (390 ) (1,247 ) — — (827 ) (2,593 ) Total consideration $ 55,453 $ 56,622 $ 50,387 $ 4,865 $ 34,461 $ 52,726 $ 254,514 Consideration paid on acquisitions was in the form of cash and debt. The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2017 (in thousands): 2525 Mission Papago Total December 31, Land $ 10,629 $ 66,097 $ 10,746 $ 87,472 Buildings and improvements 33,357 78,072 17,469 128,898 Tenant improvements 1,158 8,393 2,293 11,844 Acquired intangible assets 3,267 22,846 2,816 28,929 Prepaid expenses and other assets — 140 10 150 Accounts payable and other liabilities (190 ) (1,507 ) (246 ) (1,943 ) Lease intangible liabilities (2,186 ) (3,766 ) (99 ) (6,051 ) Total Consideration $ 46,035 $ 170,275 $ 32,989 $ 249,299 The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2016 (in thousands): Carillon FRP Park 5090 N TH SanTan Total Land $ 5,172 $ 7,031 $ 3,484 $ 6,696 $ 6,803 $ 29,186 Buildings and improvements 14,500 36,480 66,967 31,465 35,202 184,614 Tenant improvements 2,816 2,219 1,689 658 1,984 9,366 Acquired intangible assets 3,851 3,932 8,324 3,616 10,284 30,007 Prepaid expenses and other assets 73 101 307 — — 481 Accounts payable and other liabilities (217 ) (532 ) (296 ) (448 ) (544 ) (2,037 ) Lease intangible liabilities (353 ) — (773 ) (604 ) (930 ) (2,660 ) Total Consideration $ 25,842 $ 49,231 $ 79,702 $ 41,383 $ 52,799 $ 248,957 The operating results of acquired properties meeting the definition of a business, during the year ended December 31, 2016, since the date of acquisition have been included in the Company’s consolidated financial statements. Properties acquired in 2018 and 2017 were accounted for as asset acquisitions pursuant to ASU 2017-01. Year ended Operating revenues $ 7,215 Operating expenses (7,433 ) Interest (589 ) $ (807 ) Sale of Real Estate Property On March 8, 2018, the Company sold the Washington Group Plaza property in Boise, Idaho for $86.5 million, resulting in an aggregate net gain of $47.0 million, net of $1.7 million in costs, which has been classified as net gain on sale of real estate property in the condensed consolidated statements of operations. In connection with the sale of the property, certain debt repayments were made. On May 2, 2017, the Company sold the 1400 and 1600 buildings at the AmberGlen property in Portland, Oregon, and its related assets and liabilities, for a sales price of $18.9 million, resulting in an aggregate net gain of $12.1 million, net of $2.0 million in costs, which has been classified as net gain on sale of real estate property in the consolidated statements of operations. In connection with the sale of the property, certain debt repayments were made. On June 15, 2016, the Company sold the Corporate Parkway property in Allentown, Pennsylvania, and its related assets and liabilities, for a sales price of $44.9 million, resulting in an aggregate net gain of $15.9 million, net of $2.0 million in costs, which has been classified as net gain on sale of real estate property in the consolidated statements of operations. In connection with the sale of the property, certain debt repayments were made. Proceeds from the sale were applied subsequently in a like-kind exchange so as to qualify for tax-deferred Assets Held for Sale On November 30, 2018, the Company entered into a Purchase and Sale agreement to sell the Plaza 25 property for $17.9 million. The Company determined that the property met the criteria for classification as held for sale as of December 31, 2018. Upon classification as held for sale, we recognized an impairment charge of $3.5 million to lower the carrying amount of the property to its estimated fair value less cost to sell. As of December 31, 2018, a $0.5 million non-refundable The property has been classified as held for sale as of December 31, 2018 (in thousands): December 31, 2018 Plaza 25 Real estate properties, net $ 16,149 Deferred leasing costs, net 419 Acquired lease intangible assets, net 11 Rents receivable, prepaid expenses and other assets 791 Assets held for sale $ 17,370 Accounts payable, accrued expenses, deferred rent and tenant rent deposits (878 ) Liabilities related to assets held for sale $ (878 ) On September 21, 2016, we entered into a Purchase and Sale agreement to sell the Washington Group Plaza property for $86.5 million. The transaction closed in March 2018. The property was presented as held for sale as of December 31, 2017 (in thousands): December 31, 2017 Washington Real estate properties, net $ 34,543 Deferred leasing costs, net 1,295 Acquired lease intangible assets, net 817 Rents receivable, prepaid expenses and other assets 1,772 Assets held for sale $ 38,427 Acquired lease intangibles liabilities, net (2 ) Accounts payable, accrued expenses, deferred rent and tenant rent deposits (2,828 ) Liabilities related to assets held for sale $ (2,830 ) Variable Interest Entities As of December 31, 2017 the Company had entered into a purchase and sale transaction in accordance with Section 1031 of the Internal Revenue Code of 1986, as amended, for the exchange of like-kind property to defer taxable gains on the sale of properties (“1031 Exchange”). For reverse transactions under a 1031 Exchange in which the Company purchases new properties prior to selling the property to be matched in the like-kind exchange, legal title to the new properties is held by a Qualified Intermediary engaged to execute the 1031 Exchange until the sale transaction and the 1031 Exchange is completed. The Company retained essentially all of the legal and economic benefits and obligations related to Mission City, Sorrento Mesa and Papago Tech prior to completion of the 1031 Exchanges. As such, Mission City, Sorrento Mesa and Papago Tech are included in the December 31, 2017 Consolidated Balance Sheet and Consolidated Statement of Operations as a VIE.

Lease Intangibles

Lease Intangibles	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Lease Intangibles	5. Lease Intangibles Lease intangibles and the value of assumed lease obligations as of December 31, 2018 and December 31, 2017 were comprised as follows (in thousands): Lease Intangible Assets Lease Intangible Liabilities December 31, 2018 Above Market Leases Below (1) In Place Leasing Total Below Below (1) Total Cost $ 10,595 $ 1,855 $ 82,474 $ 31,706 $ 126,630 $ (12,925) $ (138) $ (13,063) Accumulated amortization (4,800 ) (19 ) (34,273 ) (12,037 ) (51,129 ) 4,140 36 4,176 $ 5,795 $ 1,836 $ 48,201 $ 19,669 $ 75,501 $ (8,785 ) $ (102 ) $ (8,887 ) Lease Intangible Assets Lease Intangible Liabilities December 31, 2017 Above Market Leases Below Lease In Place Leasing Total Below Below (1) Total Cost $ 9,082 $ — $ 71,426 $ 27,706 $ 108,214 $ (11,608) $ (138) $ (11,746) Accumulated amortization (3,215 ) — (30,613 ) (9,298 ) (43,126 ) 3,065 32 3,097 $ 5,867 $ — $ 40,813 $ 18,408 $ 65,088 $ (8,543 ) $ (106 ) $ (8,649 ) (1) For the below market ground lease asset the Company is the lessee, whereas, for the below market ground lease liability the Company is the lessor. The estimated aggregate amortization expense for lease intangibles for the five succeeding years and in the aggregate are as follows (in thousands): 2019 $ 19,824 2020 17,333 2021 14,057 2022 6,191 2023 3,215 Thereafter 5,994 $ 66,614

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	6. Debt The following table summarizes the secured indebtedness as of December 31, 2018 and 2017 (in thousands): Property December 31, December 31, Interest Rate as Maturity Unsecured Credit Facility (1) $ 147,500 $ — LIBOR +1.50 % (2) March 2022 Midland Life Insurance (3) 86,973 88,582 4.34 May 2021 Mission City 47,000 47,000 3.78 November 2027 190 Office Center (4) 41,250 41,250 4.79 October 2025 Circle Point (4) 39,650 — 4.49 September 2028 SanTan (4) 34,682 35,100 4.56 March 2027 Intellicenter (4) 33,481 33,563 4.65 October 2025 The Quad 30,600 — 4.20 September 2028 FRP Collection (4) 29,589 30,174 3.85 September 2023 2525 McKinnon 27,000 27,000 4.24 April 2027 Greenwood Blvd (4) 22,425 — 4.60 December 2025 5090 N 40th St 22,000 22,000 3.92 January 2027 AmberGlen (4) 20,000 20,000 3.69 May 2027 Lake Vista Pointe (5) 18,044 18,358 4.28 August 2024 Central Fairwinds (4) 17,882 15,107 4.00 June 2024 FRP Ingenuity Drive (5)(6) 17,000 17,000 4.44 December 2024 Carillon Point (4) 16,330 16,671 3.50 October 2023 Washington Group Plaza — 32,290 — — Plaza 25 — 16,882 — — Secured Credit Facility — 33,500 — — Total Principal 651,406 494,477 Deferred financing costs, net (6,052 ) (4,968 ) Total $ 645,354 $ 489,509 All interest rates are fixed interest rates with the exception of the unsecured credit facility (“Unsecured Credit Facility”) as explained in footnote 1 below. (1) As of December 31, 2018, the Unsecured Credit Facility had $250 million authorized and $147.5 million was drawn. On March 15, 2018, the Company entered into a $250 million Unsecured Credit Facility which includes an accordion feature that will permit the Company to borrow up to $500 million, subject to customary terms and conditions. The Company’s previous secured credit facility was replaced and repaid in full. The Unsecured Credit Facility matures in March 2022, which may be extended to March 2023 at the Company’s option upon meeting certain conditions. Borrowings under the Unsecured Credit Facility will bear an interest at a rate equal to the LIBOR rate plus a margin of between 140 to 225 basis points depending upon the Company’s consolidated leverage ratio. The Unsecured Credit Facility requires the Company to maintain a fixed charge coverage ratio of no less than 1.50x. (2) As of December 31, 2018, the one month LIBOR rate was 2.50%. (3) The mortgage loan is cross-collateralized by DTC Crossroads, Cherry Creek and City Center. Interest on mortgage loan is 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. (4) The Company is subject to various debt covenants including debt service coverage ratios (“DSCR”) that under certain conditions must be maintained no less than 1.15x, 1.20x, 1.20x, 1.40x, 1.15x, 1.35x, 1.35x, 1.20x and 1.35x respectively for each of 190 Office Center, SanTan, Intellicenter, FRP Collection, AmberGlen, Carillon Point, Central Fairwinds, Circle Point and Greenwood Blvd. (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 DSCR of no less than 1.15x. The scheduled principal repayments of mortgage payable as of December 31, 2018 are as follows (in thousands): 2019 $ 4,799 2020 5,831 2021 88,241 2022 152,568 2023 46,675 Thereafter 353,292 $ 651,406

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	7. 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 As of December 31, 2018 and 2017, the Company did not have any hedges or derivatives. On February 15, 2017, the Company entered into a Termination and Mutual Release Agreement with Second City that terminated our obligation to make any future earn-out earn-out Cash and Cash Equivalents, Restricted Cash, Rents 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 $503.3 million and $462.3 million as of December 31, 2018 and December 31, 2017, respectively. Accordingly, the fair value of mortgage loans payable have been classified as Level 3 fair value measurements.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	8. Related Party Transactions Administrative Services Agreement On October 29, 2018, the Company entered into the First Amendment (the “Amendment”) to the Administrative Services Agreement with real estate investment funds affiliated with Second City Capital II Corporate and Second City Real Estate II Corporation (“SCRE II”). The terms of the Amendment were effective on February 1, 2019 (the “Effective Date”). After February 1, 2019, the annual fees payable to the Company will be $500,000 for the first twelve months following the Effective Date and thereafter an amount equal to 40% of the management fee paid to SCRE II by the fund managed by SCRE II. During the years ended December 31, 2018, 2017, and 2016, the Company earned $0.7 million, $1.2 million, and $1.4 million, respectively, in administrative services performed for Second City Real Estate II Corporation and its affiliates (“Second City”). Earn-Out During the years ended December 31, 2018, 2017 and 2016, payments of approximately $0, $2.4 million and $3.8 million, respectively, were made to Second City under the Earn-Out Minority Interest Buy Out On August 1, 2018, the Company signed an agreement with Second City Capital Partners II, Limited Partnership whereby Second City agreed to sell its seven percent minority interest in Central Fairwinds Limited Partnership to the Company for $1.1 million. As a result of the agreement the Company’s ownership percentage in Central Fairwinds Limited Partnership is 97%.

Future Minimum Rent Schedule

Future Minimum Rent Schedule	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Future Minimum Rent Schedule	9. Future Minimum Rent Schedule Future minimum lease payments to be received as of December 31, 2018 under noncancellable operating leases for the next five years and thereafter are as follows (in thousands): 2019 $ 112,848 2020 101,448 2021 89,496 2022 71,270 2023 52,615 Thereafter 106,126 $ 533,803 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. Ten 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 9.0% of the Company’s total future minimum lease payments as of December 31, 2018.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies 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, The Company is involved from time to time in lawsuits and other disputes which arise in the ordinary course of business. As of December 31, 2018 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	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	11. Earnings per Share The table below is a reconciliation of the numerators and denominators of the basic and diluted EPS computations for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share amounts): Year ended December 31, 2018 2017 2016 Net income $ 38,669 $ 9,158 $ 376 Less: Net income attributable to noncontrolling interests in properties 501 3,402 354 Less: Net income attributable to Preferred stockholders 7,420 7,411 1,781 Less: Net income attributable to Operating Partnership unitholders’ noncontrolling interests — — 865 Numerator for basic and diluted EPS $ 30,748 $ (1,655 ) $ (2,624 ) Denominator for basic EPS 37,321 30,198 20,460 Dilutive effect of RSUs 349 — — Denominator for dilutive EPS 37,670 30,198 20,460 Net income/(loss) per common share: Basic $ 0.82 $ (0.05 ) $ (0.13 ) Dilutive $ 0.82 $ (0.05 ) $ (0.13 )

Stockholder's Equity

Stockholder's Equity	12 Months Ended
	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
Stockholder's Equity	12. Stockholder’s Equity On November 1, 2018, the Company and the Operating Partnership entered into amendments (the “Amendments”) to the equity distribution agreements (the “Original Agreements” and, as amended by the Amendments, the “Agreements”) with each of KeyBanc Capital Markets Inc., Raymond James & Associates, Inc. and BMO Capital Markets Corp., (collectively, the “Sales Agents”). Pursuant to the terms of the Agreements, the Company may issue and sell from time to time, up to 8,000,000 shares of the Company’s common stock, $0.01 par value per share and up to 1,000,000 shares of the Company’s 6.625% Series A Cumulative Redeemable Preferred Stock, par value $0.01 per share (the “Series A Preferred Stock” and together with the Common Stock, the “Shares”) through the Sales Agents, acting as agents or principals (the “ATM Program”). During the year ended December 31, 2018, the Company issued 3,410,802 shares of common stock under the ATM Program. The Company raised $43.6 million in gross proceeds, resulting in net proceeds to us of approximately $42.9 million after deducting sales commissions and offering expenses. On January 13, 2017, the Company completed a public offering pursuant to which the Company sold 5,750,000 shares of its common stock to the public at a price of $12.40 per share, inclusive of the overallotment option. The Company raised $71.3 million in gross proceeds, resulting in net proceeds to us of approximately $68.0 million after deducting $3.3 million in underwriting discounts and other expenses related to the offering. On June 16, 2017, the Company and the Operating Partnership entered into the Original Agreements with the Sales Agents, pursuant to which the Company may issue and sell from time to time up to 6,000,000 shares of common stock and up to 1,000,000 shares of Series A Preferred Stock through the Sales Agents, acting as agents or principals. Pursuant to the Agreements, the Shares may be offered and sold through the Sales Agents in transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act including sales made directly on the New York Stock Exchange or sales made to or through a market maker other than on an exchange or, with the prior consent of the Company, in privately negotiated transactions. The Sales Agents will be entitled to compensation of up to 2.0% of the gross proceeds of Shares sold through the Sales Agents from time to time under the Agreements. The Company has no obligation to sell any of the Shares under the Agreements and may at any time suspend solicitations and offers under, or terminate, the Agreements. On December 21, 2017, the Company completed a public offering pursuant to which the Company sold 5,750,000 shares of its common stock to the public at a price of $12.60 per share, inclusive of the overallotment option. The Company raised $72.5 million in gross proceeds, resulting in net proceeds to us of approximately $69.0 million after deducting $3.5 million in underwriting discounts and other expenses related to the offering. Non-controlling The following table summarizes the non-controlling December 31, 2018 December 31, 2017 City Center $ (183 ) $ (140 ) Central Fairwinds (304 ) (764 ) AmberGlen (1,272 ) (1,375 ) FRP Collection 791 842 Park Tower 1,932 1,645 $ 964 $ 208 Common Stock and Common Unit Distributions During the year ended December 31, 2018, the Company declared aggregate cash distributions to common stockholders and common unitholders of $35.6 million. The Company paid aggregate cash distributions of $34.7 million for the year-ended December 31, 2018 and $9.3 million was payable as of December 31, 2018. During the year ended December 31, 2018, the Company declared the following distributions per share and unit: Period Distribution per Share/Unit Declaration Date Record Date Payment Date January 1, 2018 – March 31, 2018 $ 0.235 March 21, 2018 April 11, 2018 April 25, 2018 April 1, 2018 – June 30, 2018 0.235 June 15, 2018 July 11, 2018 July 25, 2018 July 1, 2018 – September 30, 2018 0.235 September 14, 2018 October 11, 2018 October 25, 2018 October 1, 2018 – December 31, 2018 0.235 December 21, 2018 January 11, 2018 January 25, 2018 Total $ 0.940 Preferred Stock Distributions During the year ended December 31, 2018, the Company declared aggregate cash distributions to preferred stockholders of $7.4 million. The Company paid aggregate cash distributions of $7.4 million for the year ended December 31, 2018 and $1.9 million was payable as of December 31, 2018. 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 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 year ended December 31, 2018, 156,375 restricted stock units (“RSUs”) were granted to directors, executive officers and non-executive During the year ended December 31, 2017, 117,478 restricted stock units (“RSUs”) were granted to directors, executive officers and non-executive During the twelve months ended December 31, 2016, 78,250 restricted stock units (“RSUs”) were granted to directors and non-executive 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	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	13. Subsequent Events On February 7, 2019, the Company sold the Plaza 25 property in Denver, Colorado for a sales price of $17.9 million. On February 25, 2019, the Company, through a wholly-owned subsidiary of the Operating Partnership, acquired a 206,770 square foot property in Seattle, Washington for $63.0 million. The Company completed a $41.0 million 8-year 5-year Subsequent to December 31, 2018, the Company, through the Operating Partnership, entered into an Agreement of Purchase and Sale to acquire a two-building

Quarterly Financial Information

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	14. Quarterly Financial Information (unaudited): The following tables summarize certain selected quarterly financial data for 2018 and 2017 (in thousands, except per share data): 2018 Quarters Fourth Third Second First Revenue $ 34,167 $ 33,547 $ 30,236 $ 31,534 Net (loss)/income (6,684 ) (1,161 ) (684 ) 47,198 Net (loss)/income attributable to common stockholders (8,656 ) (3,151 ) (2,653 ) 45,208 Net (loss)/income per share (0.22 ) (0.08 ) (0.07 ) 1.25 2017 Quarters Fourth Third Second First Revenue $ 31,181 $ 24,750 $ 25,157 $ 25,399 Net (loss)/income (987 ) (1,723 ) 13,167 (1,299 ) Net (loss)/income attributable to common stockholders (2,920 ) (3,630 ) 8,208 (3,313 ) Net (loss)/income per share (0.09 ) (0.12 ) 0.27 (0.11 )

Schedule III - Real Estate Prop

Schedule III - Real Estate Properties and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Real Estate Properties and Accumulated Depreciation	SCHEDULE III – REAL ESTATE PROPERTIES AND ACCUMULATED DEPRECIATION December 31, 2018 (In Thousands) Description Encumbrances (2) Initial Costs to Company Costs Capitalized Subsequent to Acquisition Gross Amount at Which Carried as of December 31, (1) Accumulated Amortization Date of Construction Date Acquired Depreciation Life For Latest Income Land Buildings and Improvements Improvements Land Building and Improvements Total (3) AmberGlen $ 20,000 $ 6,546 $ 3,490 $ 2,050 $ 6,546 $ 5,540 $ 12,086 $ 2,630 1984-1998 December 2009 50 Years City Center 23,417 3,123 10,656 8,809 3,123 19,465 22,588 6,624 1984 December 2010 40 Years Central Fairwinds 17,882 1,747 9,751 6,716 1,747 16,467 18,214 3,692 1982 May 2012 40 Years Cherry Creek 47,791 25,745 20,144 1,359 25,745 21,503 47,248 5,834 1962-1980 January 2014 36 Years Lake Vista Pointe 18,044 4,115 20,600 55 4,115 20,655 24,770 4,220 2007 July 2014 45 Years FRP Ingenuity Drive 17,000 4,415 17,775 683 4,415 18,458 22,873 2,818 1999 November 2014 40 Years Logan Tower — 1,306 8,197 697 1,306 8,894 10,200 1,354 1983 February 2015 33 Years Superior Pointe — 3,153 19,834 1,671 3,153 21,505 24,658 2,519 2000 June 2015 40 Years DTC Crossroads 15,765 7,137 23,184 1,006 7,137 24,190 31,327 2,968 1999 June 2015 33 Years 190 Office Center 41,250 7,162 39,690 1,005 7,162 40,695 47,857 3,825 2001 September 2015 45 Years Intellicenter 33,481 5,244 34,278 26 5,244 34,304 39,548 3,673 2008 September 2015 50 Years Carillon Point 16,330 5,172 17,316 68 5,172 17,384 22,556 2,252 2007 June 2016 39 Years FRP Collection 29,589 7,031 38,700 993 7,031 39,693 46,724 4,180 1986-1999 July 2016 40 Years Park Tower — 3,479 68,656 13,987 3,479 82,643 86,122 6,146 1973 November 2016 30 Years 5090 N 40th St 22,000 6,696 32,123 1,144 6,696 33,267 39,963 1,973 1988 November 2016 45 Years SanTan 34,682 6,803 37,187 4,448 6,803 41,635 48,438 3,270 2000-2003 December 2016 41 Years 2525 McKinnon 27,000 10,629 34,515 1,134 10,629 35,649 46,278 1,928 2003 January 2017 50 Years Mission City 47,000 25,741 41,474 2,949 25,741 44,423 70,164 3,322 1990-2007 September 2017 29 Years Sorrento Mesa — 40,356 44,991 1,374 40,356 46,365 86,721 2,764 1985-2001 September 2017 33 Years Papago Tech — 10,746 19,762 295 10,746 20,057 30,803 1,237 1993-1995 October 2017 40 Years Pima Center — — 45,133 222 — 45,355 45,355 1,529 2006-2008 April 2018 44 Years Circle Point 39,650 13,681 39,101 714 13,681 39,815 53,496 1,009 2001 July 2018 40 Years The Quad 30,600 8,079 39,858 (18 ) 8,079 39,840 47,919 616 1982 July 2018 40 Years Greenwood Blvd 22,425 3,945 26,019 — 3,945 26,019 29,964 12 1997 December 2018 45 Years Camelback Square — 11,738 37,922 — 11,738 37,922 49,660 17 1978 December 2018 48 Years Corporate 147,500 — 115 — — 115 115 72 Total $ 651,406 $ 223,789 $ 730,471 $ 51,387 $ 223,789 $ 781,858 $ 1,005,647 $ 70,484 (1) The aggregate cost for federal tax purposes as of December 31, 2018 of our real estate assets was $1,020,653. (2) Encumbrances exclude net deferred financing costs of $6,052. (3) Properties identified as held for sale at December 31, 2018 are excluded. A summary of activity for real estate and accumulated depreciation for the year ended December 31, 2018 and 2017 is as follows: 2018 2017 Real Estate Properties Balance, beginning of year $ 776,301 $ 589,376 Acquisitions 225,476 228,214 Dispositions and impairments (5,715 ) (11,683 ) Capital improvements 30,378 10,804 Assets held for sale (20,793 ) (40,410 ) Balance, end of year $ 1,005,647 $ 776,301 Accumulated Depreciation Balance, beginning of year $ 48,234 $ 39,052 Depreciation 29,196 22,424 Dispositions (2,301 ) (7,374 ) Depreciation on assets held for sale (4,645 ) (5,868 ) Balance, end of year $ 70,484 $ 48,234

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Preparation and Summary of Significant Accounting Policies	Basis of Preparation and Summary of Significant Accounting Policies The accompanying consolidated 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 subsidiaries. All significant intercompany transactions and balances have been eliminated on consolidation.
Use of Estimates	Use of Estimates The Company has made a number of significant estimates and assumptions relating to the reporting of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses to prepare these consolidated financial statements in conformity with GAAP. Significant estimates made include the recoverability of accounts receivable, allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed, the determination of impairment of long-lived assets and the useful lives of long-lived assets. These estimates and assumptions are based on our best estimates and judgment. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management adjusts such estimates when facts and circumstances dictate. Actual results could differ materially from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include unrestricted cash and short-term investments with a maturity date of less than three months when acquired.
Restricted Cash	Restricted Cash Restricted cash consists of cash held in escrow by lenders pursuant to certain lender agreements and cash received from contracted building sales.
Rent Receivable, Net	Rent Receivable, Net The Company continuously monitors collections from tenants and makes a provision for estimated losses based upon historical experience and any specific tenant collection issues that the Company has identified.
Business Combinations	Business Combinations When a property is acquired, management considers the substance of the agreement in determining whether the acquisition represents an asset acquisition or a business combination. Upon acquisitions of properties that constitutes a business, the fair value of the real estate acquired, which includes the impact of fair value adjustments for assumed mortgage debt related to property acquisitions, is allocated to the acquired tangible assets, consisting of land, buildings and improvements and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, other value of in-place non-controlling The fair value of the tangible assets of an acquired property (which includes land, buildings and improvements and fixtures and equipment) is determined by valuing the property as if it were vacant. The “as-if-vacant” lease-up lease-up The fair value of above-market and below-market lease values are recorded based on the difference between the current in-place non-cancelable non-cancelable The fair value of acquired in-place lease-up in-place
Revenue Recognition	Revenue Recognition The Company recognizes lease revenue on a straight-line basis over the term of the lease. Certain leases allow for the tenant to terminate the lease, but the tenant must make a termination payment as stipulated in the lease. If the termination payment is in such an amount that continuation of the lease appears, at the time of lease inception, to be reasonably assured, then the Company recognizes revenue over the term of the lease. The Company has determined that for these leases, the termination payment is in such an amount that continuation of the lease appears, at the time of inception, to be reasonably assured. The Company recognizes lease termination fees as revenue in the period received and writes off unamortized lease-related intangible and other lease-related account balances, provided there are no further Company obligations under the lease. Otherwise, such fees and balances are recognized on a straight-line basis over the remaining obligation period with the termination payments being recorded as a component of rent receivable-deferred or deferred revenue on the consolidated balance sheets. If the Company funds tenant improvements and the improvements are deemed to be owned by the Company, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. If the Company determines that the tenant allowances are lease incentives, the Company commences revenue recognition when possession or control of the space is turned over to the tenant for tenant work to begin. The lease incentive is recorded as a deferred expense and amortized as a reduction of revenue on a straight-line basis over the respective lease term. Recoveries from tenants for real estate taxes, insurance and other operating expenses are recognized as revenues in the period that the applicable costs are incurred. The Company recognizes differences between estimated recoveries and the final billed amounts in the subsequent year. Final billings to tenants for real estate taxes, insurance and other operating expenses did not vary significantly as compared to the estimated receivable balances.
Real Estate Properties	Real Estate Properties Real estate properties are stated at cost less accumulated depreciation, except land. Depreciation is computed on the straight-line basis over estimated useful lives of: Years Buildings and improvement 29-50 Site improvement 4-23 Furniture, fixtures and equipment 4-7 Expenditures for maintenance and repairs are charged to operations as incurred.
Impairment of Real Estate Properties	Impairment of Real Estate Properties Long-lived assets currently in use are reviewed periodically for possible impairment and will be written down to fair value if considered impaired. Long-lived assets, to be disposed of, are written down to the lower of cost or fair value less the estimated cost to sell. The Company reviews its real estate properties for impairment when there is an event or a change in circumstances that indicates that the carrying amount may not be recoverable. The Company measures and records impairment losses and reduces the carrying value of properties when indicators of impairment are present and the expected undiscounted cash flows related to those properties are less than their carrying amounts. In cases where the Company does not expect to recover its carrying costs on properties held for use, the Company reduces its carrying costs to fair value.
Variable Interest Entities	Variable Interest Entities The Company consolidates variable interest entities (“VIE”) if the Company determines that it is the primary beneficiary of the entity. When evaluating the accounting for a VIE, the Company considers the purpose for which the VIE was created, the importance of each of the activities in which it is engaged and our decision-making role, if any, in those activities that significantly determine the entity’s economic performance relative to other economic interest holders. The Company determines the rights, if any, to receive benefits or the obligation to absorb losses that could potentially be significant to the VIE by considering the economic interest in the entity, regardless of form, which may include debt, equity, management and servicing fees, or other contractual arrangements. The Company considers other relevant factors including each entity’s capital structure, contractual rights to earnings (losses), subordination of the Company’s interests relative to those of other investors, contingent payments, and other contractual arrangements that may be economically significant.
Concentration of Credit Risk	Concentration of Credit Risk The Company places its temporary cash investments in high credit financial institutions. However, a portion of temporary cash investments may exceed FDIC insured levels from time to time. The Company has never experienced any losses related to these balances.
Income Taxes	Income Taxes The Company has elected to be taxed, and intends to continue to operate in a manner that will allow it to continue to qualify, as a REIT. To qualify as a REIT, the Company is required to distribute dividends equal to at least 90% of its REIT taxable income (computed without regard to the deduction for dividends paid and excluding 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, for years prior to 2018, any applicable alternative minimum tax. In addition, the Company may not be able to re-elect
Non-controlling Interests	Non-controlling The Company follows the provisions pertaining to non-controlling non-controlling non-controlling non-controlling
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.
Earnings per Common Share	Earnings per Common Share The Company calculates net income per common share based upon the weighted average shares outstanding for the years ended December 31, 2018 and December 31, 2017 and December 31, 2016. Diluted earnings per share is calculated after giving effect to all potential dilutive shares outstanding during the period.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. The Company has not elected to designate any instruments as a hedge.
Fair Value of Financial Instruments	Fair Value of Financial Instruments ASC 820-10, 820-10”) Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
Deferred Leasing Costs	Deferred Leasing Costs Fees and costs paid in the successful negotiation of leases are deferred and amortized on a straight-line basis over the terms of the respective leases.
Segment Reporting	Segment Reporting The Company operates in one industry segment, commercial real estate.
New Accounting Pronouncements	New Accounting Pronouncements Adopted in the Current Year Effective January 1, 2018, the Company adopted FASB ASU 2014-09, 2016-02, 2017-05, Effective January 1, 2018, the Company adopted FASB ASU 2016-01, 2016-01 Effective January 1, 2018, the Company adopted FASB ASU 2016-15, Effective January 1, 2018, the Company adopted FASB ASU 2016-18, To be Adopted in Future Years In February 2016, the FASB established Topic 842, Leases, by issuing Accounting Standards Update No. 2016-02, on-balance No. 2018-01, No. 2018-10, No. 2018-11, • Transition method practical expedient—permits the Company to use the effective date as the date of initial application. Consequently, financial information and disclosures for periods before January 1, 2019 will not be updated. • Package of practical expedients—permits the Company not to reassess under the new standard its prior conclusions about lease identification, lease classification, and initial direct costs. • Single component practical expedient—permits the Company to not separate lease and non-lease • Short-term lease practical expedient—for operating leases with a term equal to or less than 12 months, permits the Company to not recognize right-of-use (“ROU”) assets or lease liabilities. The Company does not expect to elect the use-of-hindsight Lessor Accounting The accounting for lessors will remain largely unchanged from current GAAP; however, the standard requires that certain initial direct costs be expensed rather than capitalized. While the new standard identifies common area maintenance as a non-lease While the Company does not anticipate any material change to the accounting for leases under which it is a lessor, the Company continues to evaluate the impact this ASU will have on the accounting for its leasing arrangements as well as its disclosures within the notes of the financial statements. Lessee Accounting The new standard requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. While the Company continues to assess all of the effects of adoption, the Company currently believe the most significant effects relate to (1) the recognition of new ROU assets and lease liabilities on the balance sheet for its ground operating leases, real estate operating leases, and office/equipment operating leases; and (2) providing significant new disclosures about its leasing activities. On adoption, the Company will recognize additional ROU assets and lease liabilities for operating leases in an amount not expected to exceed $12 million.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Real Estate Properties	Real estate properties are stated at cost less accumulated depreciation, except land. Depreciation is computed on the straight-line basis over estimated useful lives of: Years Buildings and improvement 29-50 Site improvement 4-23 Furniture, fixtures and equipment 4-7

Rents Receivable, Net (Tables)

Rents Receivable, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Components of Rents Receivable	The Company’s rents receivable is comprised of the following components (in thousands): December 31, 2018 December 31, 2017 Billed receivables $ 2,383 $ 1,905 Straight-line receivables 23,712 18,182 Total rents receivable $ 26,095 $ 20,087

Real Estate Investments (Tables

Real Estate Investments (Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Schedule of Acquired Properties	During the years ended December 31, 2018, December 31, 2017 and December 31, 2016 the Company acquired the following properties: Property Date Acquired Percentage Owned Camelback Square December 2018 100 % Greenwood Blvd December 2018 100 % Circle Point Land December 2018 100 % The Quad July 2018 100 % Circle Point July 2018 100 % Pima Center April 2018 100 % Papago Tech October 2017 100 % Mission City and Sorrento Mesa September 2017 100 % 2525 McKinnon January 2017 100 % SanTan December 2016 100 % 5090 N 40th St November 2016 100 % Park Tower November 2016 95 % FRP Collection July 2016 95 % Carillon Point June 2016 100 %
Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2018 (in thousands): Pima Circle The Circle Point Greenwood Camelback Total December 31, Land $ — $ 8,744 $ 8,079 $ 4,937 $ 3,945 $ 11,738 $ 37,443 Buildings and improvements 42,235 33,708 38,060 — 23,741 35,532 173,276 Tenant improvements 2,898 5,393 1,798 — 2,278 2,390 14,757 Acquired intangible assets 10,691 10,299 4,209 — 4,578 4,304 34,081 Prepaid expenses and other assets 95 25 15 — 15 10 160 Accounts payable and other liabilities (337 ) (1,157 ) (527 ) (72 ) (96 ) (421 ) (2,610 ) Lease intangible liabilities (129 ) (390 ) (1,247 ) — — (827 ) (2,593 ) Total consideration $ 55,453 $ 56,622 $ 50,387 $ 4,865 $ 34,461 $ 52,726 $ 254,514 Consideration paid on acquisitions was in the form of cash and debt. The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2017 (in thousands): 2525 Mission Papago Total December 31, Land $ 10,629 $ 66,097 $ 10,746 $ 87,472 Buildings and improvements 33,357 78,072 17,469 128,898 Tenant improvements 1,158 8,393 2,293 11,844 Acquired intangible assets 3,267 22,846 2,816 28,929 Prepaid expenses and other assets — 140 10 150 Accounts payable and other liabilities (190 ) (1,507 ) (246 ) (1,943 ) Lease intangible liabilities (2,186 ) (3,766 ) (99 ) (6,051 ) Total Consideration $ 46,035 $ 170,275 $ 32,989 $ 249,299 The following table summarizes the Company’s allocations of the purchase price of assets acquired and liabilities assumed during the year ended December 31, 2016 (in thousands): Carillon FRP Park 5090 N TH SanTan Total Land $ 5,172 $ 7,031 $ 3,484 $ 6,696 $ 6,803 $ 29,186 Buildings and improvements 14,500 36,480 66,967 31,465 35,202 184,614 Tenant improvements 2,816 2,219 1,689 658 1,984 9,366 Acquired intangible assets 3,851 3,932 8,324 3,616 10,284 30,007 Prepaid expenses and other assets 73 101 307 — — 481 Accounts payable and other liabilities (217 ) (532 ) (296 ) (448 ) (544 ) (2,037 ) Lease intangible liabilities (353 ) — (773 ) (604 ) (930 ) (2,660 ) Total Consideration $ 25,842 $ 49,231 $ 79,702 $ 41,383 $ 52,799 $ 248,957
Schedule of Operating Results Relating to Acquired Entities	The following table represents the results of the properties’ operations from the date of acquisition for properties acquired during the year that is presented (in thousands): Year ended Operating revenues $ 7,215 Operating expenses (7,433 ) Interest (589 ) $ (807 )
Schedule of Property Classified as Held for Sale	The property has been classified as held for sale as of December 31, 2018 (in thousands): December 31, 2018 Plaza 25 Real estate properties, net $ 16,149 Deferred leasing costs, net 419 Acquired lease intangible assets, net 11 Rents receivable, prepaid expenses and other assets 791 Assets held for sale $ 17,370 Accounts payable, accrued expenses, deferred rent and tenant rent deposits (878 ) Liabilities related to assets held for sale $ (878 ) The property was presented as held for sale as of December 31, 2017 (in thousands): December 31, 2017 Washington Real estate properties, net $ 34,543 Deferred leasing costs, net 1,295 Acquired lease intangible assets, net 817 Rents receivable, prepaid expenses and other assets 1,772 Assets held for sale $ 38,427 Acquired lease intangibles liabilities, net (2 ) Accounts payable, accrued expenses, deferred rent and tenant rent deposits (2,828 ) Liabilities related to assets held for sale $ (2,830 )

Lease Intangibles (Tables)

Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2018
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 December 31, 2018 and December 31, 2017 were comprised as follows (in thousands): Lease Intangible Assets Lease Intangible Liabilities December 31, 2018 Above Market Leases Below (1) In Place Leasing Total Below Below (1) Total Cost $ 10,595 $ 1,855 $ 82,474 $ 31,706 $ 126,630 $ (12,925) $ (138) $ (13,063) Accumulated amortization (4,800 ) (19 ) (34,273 ) (12,037 ) (51,129 ) 4,140 36 4,176 $ 5,795 $ 1,836 $ 48,201 $ 19,669 $ 75,501 $ (8,785 ) $ (102 ) $ (8,887 ) Lease Intangible Assets Lease Intangible Liabilities December 31, 2017 Above Market Leases Below Lease In Place Leasing Total Below Below (1) Total Cost $ 9,082 $ — $ 71,426 $ 27,706 $ 108,214 $ (11,608) $ (138) $ (11,746) Accumulated amortization (3,215 ) — (30,613 ) (9,298 ) (43,126 ) 3,065 32 3,097 $ 5,867 $ — $ 40,813 $ 18,408 $ 65,088 $ (8,543 ) $ (106 ) $ (8,649 ) (1) For the below market ground lease asset the Company is the lessee, whereas, for the below market ground lease liability the Company is the lessor.
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): 2019 $ 19,824 2020 17,333 2021 14,057 2022 6,191 2023 3,215 Thereafter 5,994 $ 66,614

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Secured Indebtedness	The following table summarizes the secured indebtedness as of December 31, 2018 and 2017 (in thousands): Property December 31, December 31, Interest Rate as Maturity Unsecured Credit Facility (1) $ 147,500 $ — LIBOR +1.50 % (2) March 2022 Midland Life Insurance (3) 86,973 88,582 4.34 May 2021 Mission City 47,000 47,000 3.78 November 2027 190 Office Center (4) 41,250 41,250 4.79 October 2025 Circle Point (4) 39,650 — 4.49 September 2028 SanTan (4) 34,682 35,100 4.56 March 2027 Intellicenter (4) 33,481 33,563 4.65 October 2025 The Quad 30,600 — 4.20 September 2028 FRP Collection (4) 29,589 30,174 3.85 September 2023 2525 McKinnon 27,000 27,000 4.24 April 2027 Greenwood Blvd (4) 22,425 — 4.60 December 2025 5090 N 40th St 22,000 22,000 3.92 January 2027 AmberGlen (4) 20,000 20,000 3.69 May 2027 Lake Vista Pointe (5) 18,044 18,358 4.28 August 2024 Central Fairwinds (4) 17,882 15,107 4.00 June 2024 FRP Ingenuity Drive (5)(6) 17,000 17,000 4.44 December 2024 Carillon Point (4) 16,330 16,671 3.50 October 2023 Washington Group Plaza — 32,290 — — Plaza 25 — 16,882 — — Secured Credit Facility — 33,500 — — Total Principal 651,406 494,477 Deferred financing costs, net (6,052 ) (4,968 ) Total $ 645,354 $ 489,509 All interest rates are fixed interest rates with the exception of the unsecured credit facility (“Unsecured Credit Facility”) as explained in footnote 1 below. (1) As of December 31, 2018, the Unsecured Credit Facility had $250 million authorized and $147.5 million was drawn. On March 15, 2018, the Company entered into a $250 million Unsecured Credit Facility which includes an accordion feature that will permit the Company to borrow up to $500 million, subject to customary terms and conditions. The Company’s previous secured credit facility was replaced and repaid in full. The Unsecured Credit Facility matures in March 2022, which may be extended to March 2023 at the Company’s option upon meeting certain conditions. Borrowings under the Unsecured Credit Facility will bear an interest at a rate equal to the LIBOR rate plus a margin of between 140 to 225 basis points depending upon the Company’s consolidated leverage ratio. The Unsecured Credit Facility requires the Company to maintain a fixed charge coverage ratio of no less than 1.50x. (2) As of December 31, 2018, the one month LIBOR rate was 2.50%. (3) The mortgage loan is cross-collateralized by DTC Crossroads, Cherry Creek and City Center. Interest on mortgage loan is 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. (4) The Company is subject to various debt covenants including debt service coverage ratios (“DSCR”) that under certain conditions must be maintained no less than 1.15x, 1.20x, 1.20x, 1.40x, 1.15x, 1.35x, 1.35x, 1.20x and 1.35x respectively for each of 190 Office Center, SanTan, Intellicenter, FRP Collection, AmberGlen, Carillon Point, Central Fairwinds, Circle Point and Greenwood Blvd. (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 DSCR of no less than 1.15x.
Schedule of Principal Repayments of Mortgage Payable	The scheduled principal repayments of mortgage payable as of December 31, 2018 are as follows (in thousands): 2019 $ 4,799 2020 5,831 2021 88,241 2022 152,568 2023 46,675 Thereafter 353,292 $ 651,406

Future Minimum Rent Schedule (T

Future Minimum Rent Schedule (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of Future Minimum Lease Payments under Noncancellable Operating Leases	Future minimum lease payments to be received as of December 31, 2018 under noncancellable operating leases for the next five years and thereafter are as follows (in thousands): 2019 $ 112,848 2020 101,448 2021 89,496 2022 71,270 2023 52,615 Thereafter 106,126 $ 533,803

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Summary of Reconciliation of Numerators and Denominators of Basic and Diluted Per-Share Computations	The table below is a reconciliation of the numerators and denominators of the basic and diluted EPS computations for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share amounts): Year ended December 31, 2018 2017 2016 Net income $ 38,669 $ 9,158 $ 376 Less: Net income attributable to noncontrolling interests in properties 501 3,402 354 Less: Net income attributable to Preferred stockholders 7,420 7,411 1,781 Less: Net income attributable to Operating Partnership unitholders’ noncontrolling interests — — 865 Numerator for basic and diluted EPS $ 30,748 $ (1,655 ) $ (2,624 ) Denominator for basic EPS 37,321 30,198 20,460 Dilutive effect of RSUs 349 — — Denominator for dilutive EPS 37,670 30,198 20,460 Net income/(loss) per common share: Basic $ 0.82 $ (0.05 ) $ (0.13 ) Dilutive $ 0.82 $ (0.05 ) $ (0.13 )

Stockholder's Equity (Tables)

Stockholder's Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
Summary of Noncontrolling Interests	The following table summarizes the non-controlling December 31, 2018 December 31, 2017 City Center $ (183 ) $ (140 ) Central Fairwinds (304 ) (764 ) AmberGlen (1,272 ) (1,375 ) FRP Collection 791 842 Park Tower 1,932 1,645 $ 964 $ 208
Schedule of Distributions Declared per Share and Unit	During the year ended December 31, 2018, the Company declared the following distributions per share and unit: Period Distribution per Share/Unit Declaration Date Record Date Payment Date January 1, 2018 – March 31, 2018 $ 0.235 March 21, 2018 April 11, 2018 April 25, 2018 April 1, 2018 – June 30, 2018 0.235 June 15, 2018 July 11, 2018 July 25, 2018 July 1, 2018 – September 30, 2018 0.235 September 14, 2018 October 11, 2018 October 25, 2018 October 1, 2018 – December 31, 2018 0.235 December 21, 2018 January 11, 2018 January 25, 2018 Total $ 0.940

Quarterly Financial Informati_2

Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Selected Quarterly Financial Data	The following tables summarize certain selected quarterly financial data for 2018 and 2017 (in thousands, except per share data): 2018 Quarters Fourth Third Second First Revenue $ 34,167 $ 33,547 $ 30,236 $ 31,534 Net (loss)/income (6,684 ) (1,161 ) (684 ) 47,198 Net (loss)/income attributable to common stockholders (8,656 ) (3,151 ) (2,653 ) 45,208 Net (loss)/income per share (0.22 ) (0.08 ) (0.07 ) 1.25 2017 Quarters Fourth Third Second First Revenue $ 31,181 $ 24,750 $ 25,157 $ 25,399 Net (loss)/income (987 ) (1,723 ) 13,167 (1,299 ) Net (loss)/income attributable to common stockholders (2,920 ) (3,630 ) 8,208 (3,313 ) Net (loss)/income per share (0.09 ) (0.12 ) 0.27 (0.11 )

Organization and Description _2

Organization and Description of Business - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Company formation date	Nov. 26, 2013
Operation commencement date	Apr. 21, 2014

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Real Estate Properties (Detail)	12 Months Ended
	Dec. 31, 2018
Minimum [Member] | Buildings and Improvement [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	29 years
Minimum [Member] | Site Improvement [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	4 years
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	4 years
Maximum [Member] | Buildings and Improvement [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	50 years
Maximum [Member] | Site Improvement [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	23 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Real estate properties estimated useful lives	7 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)
Summary of Significant Accounting Policies [Line Items]
Percentage of REIT taxable income distributed to stockholders	90.00%
Accounting Standards Update 2016-02 [Member] | Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Right of use assets	$ 12,000,000
Lease liabilities	$ 12,000,000

Rents Receivable, Net - Compone

Rents Receivable, Net - Components of Rents Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable, Net, Current [Abstract]
Billed receivables	$ 2,383	$ 1,905
Straight-line receivables	23,712	18,182
Total rents receivable	$ 26,095	$ 20,087

Real Estate Investments - Sched

Real Estate Investments - Schedule of Acquired Properties through Operating Partnership (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Camelback Square [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-12
Real estate property, percentage owned, asset acquisitions	100.00%
Greenwood Blvd [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-12
Real estate property, percentage owned, asset acquisitions	100.00%
Circle Point Land [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-12
Real estate property, percentage owned, asset acquisitions	100.00%
The Quad [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-07
Real estate property, percentage owned, asset acquisitions	100.00%
Circle Point [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-07
Real estate property, percentage owned, asset acquisitions	100.00%
Pima Center [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions	2018-04
Real estate property, percentage owned, asset acquisitions	100.00%
Papago Tech [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions		2017-10
Real estate property, percentage owned, asset acquisitions		100.00%
Mission City and Sorrento Mesa [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions		2017-09
Real estate property, percentage owned, asset acquisitions		100.00%
2525 McKinnon [Member]
Acquisitions [Line Items]
Real estate property, date acquired, asset acquisitions		2017-01
Real estate property, percentage owned, asset acquisitions		100.00%
SanTan [Member]
Acquisitions [Line Items]
Real estate property, date acquired, business combinations			2016-12
Real estate property, percentage owned, business combinations			100.00%
5090 N 40th St [Member]
Acquisitions [Line Items]
Real estate property, date acquired, business combinations			2016-11
Real estate property, percentage owned, business combinations			100.00%
Park Tower [Member]
Acquisitions [Line Items]
Real estate property, date acquired, business combinations			2016-11
Real estate property, percentage owned, business combinations			95.00%
FRP Collection [Member]
Acquisitions [Line Items]
Real estate property, date acquired, business combinations			2016-07
Real estate property, percentage owned, business combinations			95.00%
Carillon Point [Member]
Acquisitions [Line Items]
Real estate property, date acquired, business combinations			2016-06
Real estate property, percentage owned, business combinations			100.00%

Real Estate Investments - Sch_2

Real Estate Investments - Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquisitions [Line Items]
Land, asset acquisitions	$ 37,443	$ 87,472
Buildings and improvements, asset acquisitions	173,276	128,898
Tenant improvements, asset acquisitions	14,757	11,844
Acquired intangible assets, asset acquisitions	34,081	28,929
Prepaid expenses and other assets, asset acquisitions	160	150
Accounts payable and other liabilities, asset acquisitions	(2,610)	(1,943)
Lease intangible liabilities, asset acquisitions	(2,593)	(6,051)
Total Consideration, asset acquisitions	254,514	249,299
Land, business combinations			$ 29,186
Buildings and improvements, business combinations			184,614
Tenant improvements, business combinations			9,366
Acquired intangible assets, business combinations			30,007
Prepaid expenses and other assets, business combinations			481
Accounts payable and other liabilities, business combinations			(2,037)
Lease intangible liabilities, business combinations			(2,660)
Total Consideration, business combinations			248,957
Pima Center [Member]
Acquisitions [Line Items]
Buildings and improvements, asset acquisitions	42,235
Tenant improvements, asset acquisitions	2,898
Acquired intangible assets, asset acquisitions	10,691
Prepaid expenses and other assets, asset acquisitions	95
Accounts payable and other liabilities, asset acquisitions	(337)
Lease intangible liabilities, asset acquisitions	(129)
Total Consideration, asset acquisitions	55,453
Circle Point [Member]
Acquisitions [Line Items]
Land, asset acquisitions	8,744
Buildings and improvements, asset acquisitions	33,708
Tenant improvements, asset acquisitions	5,393
Acquired intangible assets, asset acquisitions	10,299
Prepaid expenses and other assets, asset acquisitions	25
Accounts payable and other liabilities, asset acquisitions	(1,157)
Lease intangible liabilities, asset acquisitions	(390)
Total Consideration, asset acquisitions	56,622
The Quad [Member]
Acquisitions [Line Items]
Land, asset acquisitions	8,079
Buildings and improvements, asset acquisitions	38,060
Tenant improvements, asset acquisitions	1,798
Acquired intangible assets, asset acquisitions	4,209
Prepaid expenses and other assets, asset acquisitions	15
Accounts payable and other liabilities, asset acquisitions	(527)
Lease intangible liabilities, asset acquisitions	(1,247)
Total Consideration, asset acquisitions	50,387
Circle Point Land [Member]
Acquisitions [Line Items]
Land, asset acquisitions	4,937
Accounts payable and other liabilities, asset acquisitions	(72)
Total Consideration, asset acquisitions	4,865
Greenwood Blvd [Member]
Acquisitions [Line Items]
Land, asset acquisitions	3,945
Buildings and improvements, asset acquisitions	23,741
Tenant improvements, asset acquisitions	2,278
Acquired intangible assets, asset acquisitions	4,578
Prepaid expenses and other assets, asset acquisitions	15
Accounts payable and other liabilities, asset acquisitions	(96)
Total Consideration, asset acquisitions	34,461
Camelback Square [Member]
Acquisitions [Line Items]
Land, asset acquisitions	11,738
Buildings and improvements, asset acquisitions	35,532
Tenant improvements, asset acquisitions	2,390
Acquired intangible assets, asset acquisitions	4,304
Prepaid expenses and other assets, asset acquisitions	10
Accounts payable and other liabilities, asset acquisitions	(421)
Lease intangible liabilities, asset acquisitions	(827)
Total Consideration, asset acquisitions	$ 52,726
2525 McKinnon [Member]
Acquisitions [Line Items]
Land, asset acquisitions		10,629
Buildings and improvements, asset acquisitions		33,357
Tenant improvements, asset acquisitions		1,158
Acquired intangible assets, asset acquisitions		3,267
Accounts payable and other liabilities, asset acquisitions		(190)
Lease intangible liabilities, asset acquisitions		(2,186)
Total Consideration, asset acquisitions		46,035
Mission City and Sorrento Mesa [Member]
Acquisitions [Line Items]
Land, asset acquisitions		66,097
Buildings and improvements, asset acquisitions		78,072
Tenant improvements, asset acquisitions		8,393
Acquired intangible assets, asset acquisitions		22,846
Prepaid expenses and other assets, asset acquisitions		140
Accounts payable and other liabilities, asset acquisitions		(1,507)
Lease intangible liabilities, asset acquisitions		(3,766)
Total Consideration, asset acquisitions		170,275
Papago Tech [Member]
Acquisitions [Line Items]
Land, asset acquisitions		10,746
Buildings and improvements, asset acquisitions		17,469
Tenant improvements, asset acquisitions		2,293
Acquired intangible assets, asset acquisitions		2,816
Prepaid expenses and other assets, asset acquisitions		10
Accounts payable and other liabilities, asset acquisitions		(246)
Lease intangible liabilities, asset acquisitions		(99)
Total Consideration, asset acquisitions		$ 32,989
Carillon Point [Member]
Acquisitions [Line Items]
Land, business combinations			5,172
Buildings and improvements, business combinations			14,500
Tenant improvements, business combinations			2,816
Acquired intangible assets, business combinations			3,851
Prepaid expenses and other assets, business combinations			73
Accounts payable and other liabilities, business combinations			(217)
Lease intangible liabilities, business combinations			(353)
Total Consideration, business combinations			25,842
FRP Collection [Member]
Acquisitions [Line Items]
Land, business combinations			7,031
Buildings and improvements, business combinations			36,480
Tenant improvements, business combinations			2,219
Acquired intangible assets, business combinations			3,932
Prepaid expenses and other assets, business combinations			101
Accounts payable and other liabilities, business combinations			(532)
Total Consideration, business combinations			49,231
Park Tower [Member]
Acquisitions [Line Items]
Land, business combinations			3,484
Buildings and improvements, business combinations			66,967
Tenant improvements, business combinations			1,689
Acquired intangible assets, business combinations			8,324
Prepaid expenses and other assets, business combinations			307
Accounts payable and other liabilities, business combinations			(296)
Lease intangible liabilities, business combinations			(773)
Total Consideration, business combinations			79,702
5090 N 40th St [Member]
Acquisitions [Line Items]
Land, business combinations			6,696
Buildings and improvements, business combinations			31,465
Tenant improvements, business combinations			658
Acquired intangible assets, business combinations			3,616
Accounts payable and other liabilities, business combinations			(448)
Lease intangible liabilities, business combinations			(604)
Total Consideration, business combinations			41,383
SanTan [Member]
Acquisitions [Line Items]
Land, business combinations			6,803
Buildings and improvements, business combinations			35,202
Tenant improvements, business combinations			1,984
Acquired intangible assets, business combinations			10,284
Accounts payable and other liabilities, business combinations			(544)
Lease intangible liabilities, business combinations			(930)
Total Consideration, business combinations			$ 52,799

Real Estate Investments - Sch_3

Real Estate Investments - Schedule of Operating Results Relating to Acquired Entities (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Operating revenues	$ 34,167	$ 33,547	$ 30,236	$ 31,534	$ 31,181	$ 24,750	$ 25,157	$ 25,399	$ 129,484	$ 106,487	$ 72,461
Operating expenses									(49,872)	(42,886)	(28,305)
Interest									$ (23,937)	$ (20,173)	(14,761)
Carillon Point, FRP Collection, Park Tower, 5090 N 40th St., and SanTan [Member]
Business Acquisition [Line Items]
Operating revenues											7,215
Operating expenses											(7,433)
Interest											(589)
Total											$ (807)

Real Estate Investments - Addit

Real Estate Investments - Additional Information (Detail) - USD ($) $ in Thousands	Feb. 07, 2019	Mar. 08, 2018	May 02, 2017	Jun. 15, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Net gain on sale of real estate property					$ 46,980	$ 12,116	$ 15,934
Impairment charge					3,497
Washington Group Plaza [Member]
Real Estate [Line Items]
Proceeds of sale of property		$ 86,500
Net gain on sale of real estate property		47,000
Cost incurred on property sold		$ 1,700
AmberGlen Property [Member]
Real Estate [Line Items]
Proceeds of sale of property			$ 18,900
Net gain on sale of real estate property			12,100
Cost incurred on property sold			$ 2,000
Corporate Parkway [Member]
Real Estate [Line Items]
Proceeds of sale of property				$ 44,900
Net gain on sale of real estate property				15,900
Cost incurred on property sold				$ 2,000
Plaza 25 [Member]
Real Estate [Line Items]
Non-refundable deposit received					500
Impairment charge					$ 3,500
Plaza 25 [Member] | Subsequent Event [Member]
Real Estate [Line Items]
Proceeds of sale of property	$ 17,900

Real Estate Investments - Sch_4

Real Estate Investments - Schedule of Property Classified as Held for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 17,370	$ 38,427
Liabilities related to assets held for sale	(878)	(2,830)
Plaza 25 [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	17,370
Liabilities related to assets held for sale	(878)
Plaza 25 [Member] | Real Estate Properties, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	16,149
Plaza 25 [Member] | Deferred Leasing Costs, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	419
Plaza 25 [Member] | Acquired Lease Intangible Assets, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	11
Plaza 25 [Member] | Rents Receivable, Prepaid Expenses and Other Assets [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	791
Plaza 25 [Member] | Accounts Payable, Accrued Expenses, Deferred Rent and Tenant Rent Deposits [Member]
Long Lived Assets Held-for-sale [Line Items]
Liabilities related to assets held for sale	$ (878)
Washington Group Plaza [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale		38,427
Liabilities related to assets held for sale		(2,830)
Washington Group Plaza [Member] | Real Estate Properties, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale		34,543
Washington Group Plaza [Member] | Deferred Leasing Costs, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale		1,295
Washington Group Plaza [Member] | Acquired Lease Intangible Assets, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale		817
Washington Group Plaza [Member] | Rents Receivable, Prepaid Expenses and Other Assets [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale		1,772
Washington Group Plaza [Member] | Acquired Lease Intangibles Liabilities, Net [Member]
Long Lived Assets Held-for-sale [Line Items]
Liabilities related to assets held for sale		(2)
Washington Group Plaza [Member] | Accounts Payable, Accrued Expenses, Deferred Rent and Tenant Rent Deposits [Member]
Long Lived Assets Held-for-sale [Line Items]
Liabilities related to assets held for sale		$ (2,828)

Lease Intangibles - Schedule of

Lease Intangibles - Schedule of Lease Intangibles and Value of Assumed Lease Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Assets	$ 126,630	$ 108,214
Accumulated amortization, Lease Intangible Assets	(51,129)	(43,126)
Total, Lease Intangible Assets	75,501	65,088
Cost, Lease Intangible Liabilities	(13,063)	(11,746)
Accumulated amortization, Lease Intangible Liabilities	4,176	3,097
Total, Lease Intangible Liabilities	(8,887)	(8,649)
Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Assets	10,595	9,082
Accumulated amortization, Lease Intangible Assets	(4,800)	(3,215)
Total, Lease Intangible Assets	5,795	5,867
Below Market Ground Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Assets	1,855
Accumulated amortization, Lease Intangible Assets	(19)
Total, Lease Intangible Assets	1,836
In Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Assets	82,474	71,426
Accumulated amortization, Lease Intangible Assets	(34,273)	(30,613)
Total, Lease Intangible Assets	48,201	40,813
Leasing Commissions [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Assets	31,706	27,706
Accumulated amortization, Lease Intangible Assets	(12,037)	(9,298)
Total, Lease Intangible Assets	19,669	18,408
Below Market Tenant Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Liabilities	(12,925)	(11,608)
Accumulated amortization, Lease Intangible Liabilities	4,140	3,065
Total, Lease Intangible Liabilities	(8,785)	(8,543)
Below Market Ground Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Cost, Lease Intangible Liabilities	(138)	(138)
Accumulated amortization, Lease Intangible Liabilities	36	32
Total, Lease Intangible Liabilities	$ (102)	$ (106)

Lease Intangibles - Estimated A

Lease Intangibles - Estimated Aggregate Amortization Expense for Lease Intangibles (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 19,824
2,020	17,333
2,021	14,057
2,022	6,191
2,023	3,215
Thereafter	5,994
Total	$ 66,614

Debt - Summary of Secured Indeb

Debt - Summary of Secured Indebtedness (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Indebtedness	$ 651,406	$ 494,477
Deferred financing costs, net	(6,052)	(4,968)
Total	645,354	489,509
Credit Facility [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 147,500
Maturity	2022-03
Credit Facility [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness		33,500
London Interbank Offered Rate (LIBOR) [Member] | Credit Facility [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Interest Rate, spread	1.50%
Midland Life Insurance [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 86,973	88,582
Interest Rate	4.34%
Maturity	2021-05
Mission City [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 47,000	47,000
Interest Rate	3.78%
Maturity	2027-11
190 Office Center [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 41,250	41,250
Interest Rate	4.79%
Maturity	2025-10
Circle Point [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 39,650
Interest Rate	4.49%
Maturity	2028-09
SanTan [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 34,682	35,100
Interest Rate	4.56%
Maturity	2027-03
Intellicenter [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 33,481	33,563
Interest Rate	4.65%
Maturity	2025-10
The Quad [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 30,600
Interest Rate	4.20%
Maturity	2028-09
FRP Collection [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 29,589	30,174
Interest Rate	3.85%
Maturity	2023-09
2525 McKinnon [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 27,000	27,000
Interest Rate	4.24%
Maturity	2027-04
Greenwood Blvd [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 22,425
Interest Rate	4.60%
Maturity	2025-12
5090 N 40th St [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 22,000	22,000
Interest Rate	3.92%
Maturity	2027-01
AmberGlen Property [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 20,000	20,000
Interest Rate	3.69%
Maturity	2027-05
Lake Vista Pointe [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 18,044	18,358
Interest Rate	4.28%
Maturity	2024-08
Central Fairwinds [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 17,882	15,107
Interest Rate	4.00%
Maturity	2024-06
FRP Ingenuity Drive [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 17,000	17,000
Interest Rate	4.44%
Maturity	2024-12
Carillon Point [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness	$ 16,330	16,671
Interest Rate	3.50%
Maturity	2023-10
Washington Group Plaza [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness		32,290
Plaza 25 [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Indebtedness		$ 16,882

Debt - Summary of Secured Ind_2

Debt - Summary of Secured Indebtedness (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 15, 2018
Midland Life Insurance [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Loan maturity date	May 6, 2021
Amortization period	360 months
Effective interest rate of loan	4.34%
190 Office Center [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.79%
190 Office Center [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	115.00%
Circle Point [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.49%
Circle Point [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	120.00%
SanTan [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.56%
SanTan [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	120.00%
Intellicenter [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.65%
Intellicenter [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	120.00%
FRP Collection [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	3.85%
FRP Collection [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	140.00%
Greenwood Blvd [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.60%
Greenwood Blvd [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	135.00%
AmberGlen Property [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	3.69%
AmberGlen Property [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	115.00%
Lake Vista Pointe [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Amortization period	360 months
Effective interest rate of loan	4.28%
Central Fairwinds [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	4.00%
Central Fairwinds [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	135.00%
FRP Ingenuity Drive [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Amortization period	360 months
Effective interest rate of loan	4.44%
Minimum net worth required	$ 17,000,000
Minimum liquidity requirements	$ 1,700,000
FRP Ingenuity Drive [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	115.00%
Carillon Point [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate of loan	3.50%
Carillon Point [Member] | Secured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
DSCR	135.00%
Credit Facility [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, authorized amount	$ 250,000,000	$ 250,000,000
Revolving Credit Facility, outstanding amount	$ 147,500,000
Loan maturity date	Mar. 31, 2022
Loan expected extended maturity date	Mar. 31, 2023
Revolving Credit Facility, maximum borrowing capacity		$ 500,000,000
Credit Facility [Member] | Unsecured Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate, Description	1.50%
One month LIBOR rate	2.50%
Credit Facility [Member] | Unsecured Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	150.00%
Credit Facility [Member] | Unsecured Debt [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate, Description	1.40%
Credit Facility [Member] | Unsecured Debt [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate, Description	2.25%

Debt - Schedule of Principal Re

Debt - Schedule of Principal Repayments of Mortgage Payable (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 4,799
2,020	5,831
2,021	88,241
2,022	152,568
2,023	46,675
Thereafter	353,292
Total	$ 651,406	$ 494,477

Fair Value of Financial Instr_2

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	Feb. 21, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Hedges or derivatives		$ 0	$ 0
Second City Funds [Member] | Termination and Mutual Release Agreement - Earn-Out [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party transaction	$ 2,400,000	0	2,400,000	$ 3,800,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans payable, fair value		$ 503,300,000	$ 462,300,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	Feb. 01, 2019	Oct. 29, 2018	Aug. 01, 2018	Feb. 21, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Central Fairwinds Limited Partnership [Member]
Related Party Transaction [Line Items]
Percentage minority interest owned, acquired			7.00%
Percentage minority interest owned					97.00%
Administrative Services Agreement [Member] | SCRE II [Member]
Related Party Transaction [Line Items]
Agreement entered date		Oct. 29, 2018
Agreement effective date		Feb. 1, 2019
Administrative Services Agreement [Member] | SCRE II [Member] | First Twelve Months [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Annual payment receivable for services	$ 500,000
Administrative Services Agreement [Member] | SCRE II [Member] | Thereafter [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Management fee paid percentage	40.00%
Administrative Services Agreement [Member] | Second City Funds [Member]
Related Party Transaction [Line Items]
Annual payment receivable for services					$ 700,000	$ 1,200,000	$ 1,400,000
Termination and Mutual Release Agreement - Earn-Out [Member] | Second City Funds [Member]
Related Party Transaction [Line Items]
Related party transaction				$ 2,400,000	$ 0	$ 2,400,000	$ 3,800,000
Central Fairwinds Limited Partnership Minority Interest Purchase Agreements [Member] | Second City Funds [Member]
Related Party Transaction [Line Items]
Related party transaction			$ 1,100,000

Future Minimum Rent Schedule -

Future Minimum Rent Schedule - Schedule of Future Minimum Lease Payments under Non-cancellable Operating Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 112,848
2,020	101,448
2,021	89,496
2,022	71,270
2,023	52,615
Thereafter	106,126
Total future minimum lease payments to be received	$ 533,803

Future Minimum Rent Schedule _2

Future Minimum Rent Schedule - Additional Information (Detail)	Dec. 31, 2018
Sales Revenue, Services, Net [Member] | Government Contracts Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of total future minimum lease payments	9.00%

Earnings Per Share - Summary of

Earnings Per Share - Summary of Reconciliation of Numerators and Denominators of Basic and Diluted Per-Share Computations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share Reconciliation [Abstract]
Net income	$ (6,684)	$ (1,161)	$ (684)	$ 47,198	$ (987)	$ (1,723)	$ 13,167	$ (1,299)	$ 38,669	$ 9,158	$ 376
Less: Net income attributable to noncontrolling interests in properties									501	3,402	354
Less: Net income attributable to Preferred stockholders									7,420	7,411	1,781
Less: Net income attributable to Operating Partnership unitholders' noncontrolling interests											865
Net income/(loss) attributable to common stockholders	$ (8,656)	$ (3,151)	$ (2,653)	$ 45,208	$ (2,920)	$ (3,630)	$ 8,208	$ (3,313)	$ 30,748	$ (1,655)	$ (2,624)
Denominator for basic EPS									37,321	30,198	20,460
Dilutive effect of RSUs									349
Denominator for dilutive EPS									37,670	30,198	20,460
Net income/(loss) per common share:
Basic									$ 0.82	$ (0.05)	$ (0.13)
Dilutive									$ 0.82	$ (0.05)	$ (0.13)

Stockholder's Equity - Addition

Stockholder's Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands	Nov. 01, 2018$ / sharesshares	Dec. 21, 2017USD ($)$ / sharesshares	Jun. 16, 2017shares	Jan. 13, 2017USD ($)$ / sharesshares	Dec. 31, 2018USD ($)Installment$ / sharesshares	Dec. 31, 2017USD ($)Installment$ / sharesshares	Dec. 31, 2016USD ($)Installmentshares
Class of Stock [Line Items]
Common stock, shares authorized | shares					100,000,000	100,000,000
Common stock, par value | $ / shares					$ 0.01	$ 0.01
Preferred stock, shares authorized | shares					5,600,000	5,600,000
Preferred stock, Dividend rate percentage					6.625%	6.625%
Preferred stock, par value per share | $ / shares					$ 0.01	$ 0.01
Net proceeds from sale of common stock					$ 42,902	$ 136,941	$ 86,785
Aggregate cash distributions payable					$ 11,148	$ 10,318
Maximum number of shares issued under Equity Incentive Plan | shares					1,263,580
Sales Agreement [Member]
Class of Stock [Line Items]
Common stock, shares authorized | shares	8,000,000		6,000,000
Common stock, par value | $ / shares	$ 0.01
Preferred stock, shares authorized | shares	1,000,000		1,000,000
Preferred stock, Dividend rate percentage	6.625%
Preferred stock, par value per share | $ / shares	$ 0.01
Net proceeds from sale of common stock					$ 42,900
Percentage of compensation from gross proceeds of shares sold			2.00%
Common Stock [Member]
Class of Stock [Line Items]
Stock, shares issued | shares					3,411,000	11,500,000	8,050,000
Aggregate cash distributions payable					$ 9,300
Common Stock [Member] | Sales Agreement [Member]
Class of Stock [Line Items]
Stock, shares issued | shares					3,410,802
Gross proceeds from sale of stock					$ 43,600
Common Stock [Member] | Public Offering [Member]
Class of Stock [Line Items]
Stock, shares issued | shares		5,750,000		5,750,000
Gross proceeds from sale of stock		$ 72,500		$ 71,300
Shares issued, price per share | $ / shares		$ 12.60		$ 12.40
Net proceeds from sale of stock		$ 69,000		$ 68,000
Underwriting discounts and other expenses		$ 3,500		$ 3,300
Common Stock [Member] | Dividend Declared [Member]
Class of Stock [Line Items]
Cash distributions					35,600
Common Stock [Member] | Dividend Paid [Member]
Class of Stock [Line Items]
Cash distributions					34,700
Preferred Stock [Member]
Class of Stock [Line Items]
Aggregate cash distributions payable					1,900
Preferred Stock [Member] | Dividend Declared [Member]
Class of Stock [Line Items]
Cash distributions					7,400
Preferred Stock [Member] | Dividend Paid [Member]
Class of Stock [Line Items]
Cash distributions					7,400
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Net compensation expense					$ 1,400	$ 1,700	$ 2,400
Restricted Stock Units (RSUs) [Member] | Directors and Non-Executive Employees [Member]
Class of Stock [Line Items]
Restricted stock units granted to executive officers, directors and non-executive employees | shares					156,375	117,478	78,250
Restricted stock units grant date fair value					$ 1,900	$ 1,500	$ 1,000
Number of annual installments for award vesting | Installment					3	3	3

Stockholder's Equity - Summary

Stockholder's Equity - Summary of Noncontrolling Interests in Properties (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	$ 964	$ 208
City Center [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	(183)	(140)
Central Fairwinds [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	(304)	(764)
AmberGlen Property [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	(1,272)	(1,375)
FRP Collection [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	791	842
Park Tower [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests in properties	$ 1,932	$ 1,645

Stockholder's Equity - Schedule

Stockholder's Equity - Schedule of Distributions Declared per Share and Unit (Detail) - $ / shares	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends Payable [Line Items]
Distribution per Common Share/Unit	$ 0.235	$ 0.235	$ 0.235	$ 0.235	$ 0.940	$ 0.940	$ 0.940
Common Stock [Member]
Dividends Payable [Line Items]
Declaration Date	Dec. 21, 2018	Sep. 14, 2018	Jun. 15, 2018	Mar. 21, 2018
Record Date	Jan. 11, 2018	Oct. 11, 2018	Jul. 11, 2018	Apr. 11, 2018
Payment Date	Jan. 25, 2018	Oct. 25, 2018	Jul. 25, 2018	Apr. 25, 2018

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Thousands	Feb. 25, 2019USD ($)ft²	Feb. 07, 2019USD ($)	Jun. 30, 2019USD ($)Building	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Subsequent Event [Line Items]
Acquisition of real estate				$ 254,514	$ 249,299	$ 248,957
Accounts payable and other liabilities, asset acquisitions				$ 2,610	$ 1,943
Plaza 25 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds of sale of property		$ 17,900
Washington Property [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Area of property | ft²	206,770
Acquisition of real estate	$ 63,000
Scenario, Forecast [Member] | Oregon Property [Member]
Subsequent Event [Line Items]
Acquisition of real estate			$ 32,500
Number Of real estate buildings acquired | Building			2
Accounts payable and other liabilities, asset acquisitions			$ 22,500
Washington Property [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt face amount	$ 41,000
Debt term	8 years
Debt term extension	5 years
Interest Rate	4.30%

Quarterly Financial Informati_3

Quarterly Financial Information - Summary of Selected Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 34,167	$ 33,547	$ 30,236	$ 31,534	$ 31,181	$ 24,750	$ 25,157	$ 25,399	$ 129,484	$ 106,487	$ 72,461
Net (loss)/income	(6,684)	(1,161)	(684)	47,198	(987)	(1,723)	13,167	(1,299)	38,669	9,158	376
Net (loss)/income attributable to common stockholders	$ (8,656)	$ (3,151)	$ (2,653)	$ 45,208	$ (2,920)	$ (3,630)	$ 8,208	$ (3,313)	$ 30,748	$ (1,655)	$ (2,624)
Net (loss)/income per share	$ (0.22)	$ (0.08)	$ (0.07)	$ 1.25	$ (0.09)	$ (0.12)	$ 0.27	$ (0.11)

Schedule III - Real Estate Pr_2

Schedule III - Real Estate Properties and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 651,406
Initial Costs to Company, Land	223,789
Initial Costs to Company, Buildings and Improvements	730,471
Costs Capitalized Subsequent to Acquisitions, Improvements	51,387
Gross Amount, Land	223,789
Gross Amount, Building and Improvements	781,858
Gross Amount, Total	1,005,647	$ 776,301	$ 589,376
Accumulated Amortization	70,484	$ 48,234	$ 39,052
AmberGlen Property [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	20,000
Initial Costs to Company, Land	6,546
Initial Costs to Company, Buildings and Improvements	3,490
Costs Capitalized Subsequent to Acquisitions, Improvements	2,050
Gross Amount, Land	6,546
Gross Amount, Building and Improvements	5,540
Gross Amount, Total	12,086
Accumulated Amortization	$ 2,630
Date Acquired	2009-12
Depreciation Life for the Latest Income Statement	50 years
AmberGlen Property [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,984
AmberGlen Property [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,998
City Center Property [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 23,417
Initial Costs to Company, Land	3,123
Initial Costs to Company, Buildings and Improvements	10,656
Costs Capitalized Subsequent to Acquisitions, Improvements	8,809
Gross Amount, Land	3,123
Gross Amount, Building and Improvements	19,465
Gross Amount, Total	22,588
Accumulated Amortization	$ 6,624
Date of Construction	1,984
Date Acquired	2010-12
Depreciation Life for the Latest Income Statement	40 years
Central Fairwinds [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 17,882
Initial Costs to Company, Land	1,747
Initial Costs to Company, Buildings and Improvements	9,751
Costs Capitalized Subsequent to Acquisitions, Improvements	6,716
Gross Amount, Land	1,747
Gross Amount, Building and Improvements	16,467
Gross Amount, Total	18,214
Accumulated Amortization	$ 3,692
Date of Construction	1,982
Date Acquired	2012-05
Depreciation Life for the Latest Income Statement	40 years
Cherry Creek [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 47,791
Initial Costs to Company, Land	25,745
Initial Costs to Company, Buildings and Improvements	20,144
Costs Capitalized Subsequent to Acquisitions, Improvements	1,359
Gross Amount, Land	25,745
Gross Amount, Building and Improvements	21,503
Gross Amount, Total	47,248
Accumulated Amortization	$ 5,834
Date Acquired	2014-01
Depreciation Life for the Latest Income Statement	36 years
Cherry Creek [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,962
Cherry Creek [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,980
Lake Vista Pointe [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 18,044
Initial Costs to Company, Land	4,115
Initial Costs to Company, Buildings and Improvements	20,600
Costs Capitalized Subsequent to Acquisitions, Improvements	55
Gross Amount, Land	4,115
Gross Amount, Building and Improvements	20,655
Gross Amount, Total	24,770
Accumulated Amortization	$ 4,220
Date of Construction	2,007
Date Acquired	2014-07
Depreciation Life for the Latest Income Statement	45 years
FRP Ingenuity Drive [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 17,000
Initial Costs to Company, Land	4,415
Initial Costs to Company, Buildings and Improvements	17,775
Costs Capitalized Subsequent to Acquisitions, Improvements	683
Gross Amount, Land	4,415
Gross Amount, Building and Improvements	18,458
Gross Amount, Total	22,873
Accumulated Amortization	$ 2,818
Date of Construction	1,999
Date Acquired	2014-11
Depreciation Life for the Latest Income Statement	40 years
Logan Tower [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 1,306
Initial Costs to Company, Buildings and Improvements	8,197
Costs Capitalized Subsequent to Acquisitions, Improvements	697
Gross Amount, Land	1,306
Gross Amount, Building and Improvements	8,894
Gross Amount, Total	10,200
Accumulated Amortization	$ 1,354
Date of Construction	1,983
Date Acquired	2015-02
Depreciation Life for the Latest Income Statement	33 years
Superior Pointe [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 3,153
Initial Costs to Company, Buildings and Improvements	19,834
Costs Capitalized Subsequent to Acquisitions, Improvements	1,671
Gross Amount, Land	3,153
Gross Amount, Building and Improvements	21,505
Gross Amount, Total	24,658
Accumulated Amortization	$ 2,519
Date of Construction	2,000
Date Acquired	2015-06
Depreciation Life for the Latest Income Statement	40 years
DTC Crossroads [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 15,765
Initial Costs to Company, Land	7,137
Initial Costs to Company, Buildings and Improvements	23,184
Costs Capitalized Subsequent to Acquisitions, Improvements	1,006
Gross Amount, Land	7,137
Gross Amount, Building and Improvements	24,190
Gross Amount, Total	31,327
Accumulated Amortization	$ 2,968
Date of Construction	1,999
Date Acquired	2015-06
Depreciation Life for the Latest Income Statement	33 years
190 Office Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 41,250
Initial Costs to Company, Land	7,162
Initial Costs to Company, Buildings and Improvements	39,690
Costs Capitalized Subsequent to Acquisitions, Improvements	1,005
Gross Amount, Land	7,162
Gross Amount, Building and Improvements	40,695
Gross Amount, Total	47,857
Accumulated Amortization	$ 3,825
Date of Construction	2,001
Date Acquired	2015-09
Depreciation Life for the Latest Income Statement	45 years
Intellicenter [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 33,481
Initial Costs to Company, Land	5,244
Initial Costs to Company, Buildings and Improvements	34,278
Costs Capitalized Subsequent to Acquisitions, Improvements	26
Gross Amount, Land	5,244
Gross Amount, Building and Improvements	34,304
Gross Amount, Total	39,548
Accumulated Amortization	$ 3,673
Date of Construction	2,008
Date Acquired	2015-09
Depreciation Life for the Latest Income Statement	50 years
Carillon Point [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 16,330
Initial Costs to Company, Land	5,172
Initial Costs to Company, Buildings and Improvements	17,316
Costs Capitalized Subsequent to Acquisitions, Improvements	68
Gross Amount, Land	5,172
Gross Amount, Building and Improvements	17,384
Gross Amount, Total	22,556
Accumulated Amortization	$ 2,252
Date of Construction	2,007
Date Acquired	2016-06
Depreciation Life for the Latest Income Statement	39 years
FRP Collection [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 29,589
Initial Costs to Company, Land	7,031
Initial Costs to Company, Buildings and Improvements	38,700
Costs Capitalized Subsequent to Acquisitions, Improvements	993
Gross Amount, Land	7,031
Gross Amount, Building and Improvements	39,693
Gross Amount, Total	46,724
Accumulated Amortization	$ 4,180
Date Acquired	2016-07
Depreciation Life for the Latest Income Statement	40 years
FRP Collection [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,986
FRP Collection [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,999
Park Tower [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 3,479
Initial Costs to Company, Buildings and Improvements	68,656
Costs Capitalized Subsequent to Acquisitions, Improvements	13,987
Gross Amount, Land	3,479
Gross Amount, Building and Improvements	82,643
Gross Amount, Total	86,122
Accumulated Amortization	$ 6,146
Date of Construction	1,973
Date Acquired	2016-11
Depreciation Life for the Latest Income Statement	30 years
5090 N 40th St [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,000
Initial Costs to Company, Land	6,696
Initial Costs to Company, Buildings and Improvements	32,123
Costs Capitalized Subsequent to Acquisitions, Improvements	1,144
Gross Amount, Land	6,696
Gross Amount, Building and Improvements	33,267
Gross Amount, Total	39,963
Accumulated Amortization	$ 1,973
Date of Construction	1,988
Date Acquired	2016-11
Depreciation Life for the Latest Income Statement	45 years
SanTan [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 34,682
Initial Costs to Company, Land	6,803
Initial Costs to Company, Buildings and Improvements	37,187
Costs Capitalized Subsequent to Acquisitions, Improvements	4,448
Gross Amount, Land	6,803
Gross Amount, Building and Improvements	41,635
Gross Amount, Total	48,438
Accumulated Amortization	$ 3,270
Date Acquired	2016-12
Depreciation Life for the Latest Income Statement	41 years
SanTan [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,000
SanTan [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,003
2525 McKinnon [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 27,000
Initial Costs to Company, Land	10,629
Initial Costs to Company, Buildings and Improvements	34,515
Costs Capitalized Subsequent to Acquisitions, Improvements	1,134
Gross Amount, Land	10,629
Gross Amount, Building and Improvements	35,649
Gross Amount, Total	46,278
Accumulated Amortization	$ 1,928
Date of Construction	2,003
Date Acquired	2017-01
Depreciation Life for the Latest Income Statement	50 years
Mission City [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 47,000
Initial Costs to Company, Land	25,741
Initial Costs to Company, Buildings and Improvements	41,474
Costs Capitalized Subsequent to Acquisitions, Improvements	2,949
Gross Amount, Land	25,741
Gross Amount, Building and Improvements	44,423
Gross Amount, Total	70,164
Accumulated Amortization	$ 3,322
Date Acquired	2017-09
Depreciation Life for the Latest Income Statement	29 years
Mission City [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,990
Mission City [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,007
Sorrento Mesa [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 40,356
Initial Costs to Company, Buildings and Improvements	44,991
Costs Capitalized Subsequent to Acquisitions, Improvements	1,374
Gross Amount, Land	40,356
Gross Amount, Building and Improvements	46,365
Gross Amount, Total	86,721
Accumulated Amortization	$ 2,764
Date Acquired	2017-09
Depreciation Life for the Latest Income Statement	33 years
Sorrento Mesa [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,985
Sorrento Mesa [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,001
Papago Tech [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 10,746
Initial Costs to Company, Buildings and Improvements	19,762
Costs Capitalized Subsequent to Acquisitions, Improvements	295
Gross Amount, Land	10,746
Gross Amount, Building and Improvements	20,057
Gross Amount, Total	30,803
Accumulated Amortization	$ 1,237
Date Acquired	2017-10
Depreciation Life for the Latest Income Statement	40 years
Papago Tech [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,993
Papago Tech [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	1,995
Pima Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Buildings and Improvements	$ 45,133
Costs Capitalized Subsequent to Acquisitions, Improvements	222
Gross Amount, Building and Improvements	45,355
Gross Amount, Total	45,355
Accumulated Amortization	$ 1,529
Date Acquired	2018-04
Depreciation Life for the Latest Income Statement	44 years
Pima Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,006
Pima Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Date of Construction	2,008
Circle Point [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 39,650
Initial Costs to Company, Land	13,681
Initial Costs to Company, Buildings and Improvements	39,101
Costs Capitalized Subsequent to Acquisitions, Improvements	714
Gross Amount, Land	13,681
Gross Amount, Building and Improvements	39,815
Gross Amount, Total	53,496
Accumulated Amortization	$ 1,009
Date of Construction	2,001
Date Acquired	2018-07
Depreciation Life for the Latest Income Statement	40 years
The Quad [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 30,600
Initial Costs to Company, Land	8,079
Initial Costs to Company, Buildings and Improvements	39,858
Costs Capitalized Subsequent to Acquisitions, Improvements	(18)
Gross Amount, Land	8,079
Gross Amount, Building and Improvements	39,840
Gross Amount, Total	47,919
Accumulated Amortization	$ 616
Date of Construction	1,982
Date Acquired	2018-07
Depreciation Life for the Latest Income Statement	40 years
Greenwood Blvd [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,425
Initial Costs to Company, Land	3,945
Initial Costs to Company, Buildings and Improvements	26,019
Gross Amount, Land	3,945
Gross Amount, Building and Improvements	26,019
Gross Amount, Total	29,964
Accumulated Amortization	$ 12
Date of Construction	1,997
Date Acquired	2018-12
Depreciation Life for the Latest Income Statement	45 years
Camelback Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Initial Costs to Company, Land	$ 11,738
Initial Costs to Company, Buildings and Improvements	37,922
Gross Amount, Land	11,738
Gross Amount, Building and Improvements	37,922
Gross Amount, Total	49,660
Accumulated Amortization	$ 17
Date of Construction	1,978
Date Acquired	2018-12
Depreciation Life for the Latest Income Statement	48 years
Corporate [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 147,500
Initial Costs to Company, Buildings and Improvements	115
Gross Amount, Building and Improvements	115
Gross Amount, Total	115
Accumulated Amortization	$ 72

Schedule III - Real Estate Pr_3

Schedule III - Real Estate Properties and Accumulated Depreciation (Parenthetical) (Detail)	Dec. 31, 2018USD ($)
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Real estate assets, aggregate cost for federal tax purpose	$ 1,020,653
Secured Debt [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Deferred financing costs	$ 6,052

Schedule III - Summary of Real

Schedule III - Summary of Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties
Balance, beginning of year	$ 776,301	$ 589,376
Acquisitions	225,476	228,214
Dispositions and impairments	(5,715)	(11,683)
Capital improvements	30,378	10,804
Assets held for sale	(20,793)	(40,410)
Balance, end of year	1,005,647	776,301
Accumulated Depreciation
Balance, beginning of year	48,234	39,052
Depreciation	29,196	22,424
Dispositions	(2,301)	(7,374)
Depreciation on assets held for sale	(4,645)	(5,868)
Balance, end of year	$ 70,484	$ 48,234