Gladstone Commercial (GOOD) 10-Q 29 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 29, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Entity Registrant Name	'GLADSTONE COMMERCIAL CORP	'
Entity Central Index Key	'0001234006	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	17,715,958

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'		'
Real estate, at cost	$684,001		$642,353
Less: accumulated depreciation	88,520		81,241
Total real estate, net	595,481		561,112
Lease intangibles, net	92,129		79,632
Cash and cash equivalents	2,367		8,546
Restricted cash	3,116		5,051
Funds held in escrow	12,811		8,653
Deferred rent receivable, net	20,590		18,905
Deferred financing costs, net	6,678		6,840
Other assets	2,358		1,786
TOTAL ASSETS	735,530		690,525
LIABILITIES	'		'
Mortgage notes payable	456,237		422,602
Borrowings under line of credit	25,650		24,400
Series C mandatorily redeemable preferred stock, par value $0.001 per share; $25 per share liquidation preference; 1,700,000 shares authorized; and 1,540,000 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	38,500		38,500
Deferred rent liability, net	5,703		6,015
Asset retirement obligation	3,747		3,884
Accounts payable and accrued expenses	6,498		2,359
Due to Adviser and Administrator	1,737	[1]	1,360	[1]
Other liabilities	6,908		8,259
Total Liabilities	544,980		507,379
Commitments and contingencies	'	[2]	'	[2]
STOCKHOLDERS' EQUITY	'		'
Series A and B redeemable preferred stock, par value $0.001 per share; $25 per share liquidation preference; 2,300,000 shares authorized and 2,150,000 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	2		2
Senior common stock, par value $0.001 per share; 7,500,000 shares authorized and 441,774 and 374,484 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	0		0
Common stock, par value $0.001 per share, 38,500,000 shares authorized and 17,715,958 and 15,662,414 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	18		16
Additional paid in capital	332,850		298,751
Notes receivable - employee	-375		-375
Distributions in excess of accumulated earnings	-141,945		-115,248
Total Stockholders' Equity	190,550		183,146
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$735,530		$690,525
[1]	Refer to Note 2 "Related-Party Transactions"
[2]	Refer to Note 8 "Commitments and Contingencies"

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013
			Series C Preferred Stock [Member]	Series C Preferred Stock [Member]
			Mandatorily Redeemable Preferred Stock [Member]	Mandatorily Redeemable Preferred Stock [Member]
Redeemable preferred stock, par value	$0.00	$0.00	$0.00	$0.00
Redeemable preferred stock, liquidation preference	$25	$25	$25	$25
Redeemable preferred stock, shares authorized	2,300,000	2,300,000	1,700,000	1,700,000
Redeemable preferred stock, shares issued	2,150,000	2,150,000	1,540,000	1,540,000
Redeemable preferred stock, shares outstanding	2,150,000	2,150,000	1,540,000	1,540,000
Senior common stock, par value	$0.00	$0.00	'	'
Senior common stock, shares authorized	7,500,000	7,500,000	'	'
Senior common stock, shares issued	441,774	374,484	'	'
Senior common stock, shares outstanding	441,774	374,484	'	'
Common stock, par value	$0.00	$0.00	'	'
Common stock, shares authorized	38,500,000	38,500,000	'	'
Common stock, shares issued	17,715,958	15,662,414	'	'
Common stock, shares outstanding	17,715,958	15,662,414	'	'

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Operating revenues	'		'		'		'
Rental revenue	$17,620		$14,190		$34,205		$27,856
Tenant recovery revenue	770		68		1,321		437
Income from real estate and related assets held for sale	18,390		14,258		35,526		28,293
Operating expenses	'		'		'		'
Depreciation and amortization	6,871		5,220		13,591		10,121
Property operating expenses	1,302		564		2,632		1,300
Acquisition related expenses	859		274		970		459
Base management fee	666	[1]	451	[1]	1,291	[1]	804	[1]
Incentive fee	1,527	[1]	933	[1]	2,767	[1]	1,864	[1]
Administration fee	485	[1]	367	[1]	977	[1]	730	[1]
General and administrative	490		477		957		866
Impairment charge	'		'		13,958		'
Total operating expenses before credit to incentive fee	12,200		8,286		37,143		16,144
Credit to incentive fee	-957	[1]	-917	[1]	-2,162	[1]	-1,502	[1]
Total operating expenses	11,243		7,369		34,981		14,642
Other income (expense)	'		'		'		'
Interest expense	-6,509		-5,764		-12,784		-11,425
Gain on sale of real estate	1,240		'		1,240		'
Other income	27		12		74		29
Total other expense	-5,928		-6,438		-12,842		-12,768
Net income (loss)	1,219		451		-12,297		883
Distributions attributable to senior common stock	-110		-69		-210		-122
Net income (loss) available (attributable) to common stockholders	86		-641		-14,554		-1,286
Earnings (loss) per weighted average share of common stock - basic & diluted	'		'		'		'
Income (loss) from continuing operations (net of dividends attributable to preferred stock)	$0.01		($0.05)		($0.90)		($0.11)
Net income (loss) available to common stockholders	$0.01		($0.05)		($0.90)		($0.11)
Weighted average shares of common stock outstanding	'		'		'		'
Basic	16,547,793		12,380,402		16,149,467		11,808,701
Diluted	16,894,973		12,380,402		16,149,467		11,808,701
Earnings per weighted average share of senior common stock	$0.26		$0.26		$0.52		$0.52
Weighted average shares of senior common stock outstanding - basic	421,312		261,754		404,243		233,633
Series C Preferred Stock [Member]	'		'		'		'
Other income (expense)	'		'		'		'
Distributions attributable to Series C mandatorily redeemable preferred stock	-686		-686		-1,372		-1,372
Series A and B Preferred Stock [Member]	'		'		'		'
Other income (expense)	'		'		'		'
Distributions attributable to Series A and B preferred stock	($1,023)		($1,023)		($2,047)		($2,047)
[1]	Refer to Note 2 "Related-Party Transactions"

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net (loss) income	($12,297)	$883
Adjustments to reconcile net (loss) income to net cash provided by operating activities:	'	'
Depreciation and amortization	13,591	10,121
Impairment charge	13,958	'
Gain on sale of real estate	-1,240	'
Amortization of deferred financing costs	795	817
Amortization of deferred rent asset and liability, net	-178	-157
Amortization of discount and premium on assumed debt	-114	-85
Asset retirement obligation expense	-137	64
Increase in other assets	-372	-218
Increase in deferred rent receivable	-1,778	-1,689
Decrease in accounts payable, accrued expenses, and amount due Adviser and Administrator	-1,004	-1,664
Increase (decrease) in other liabilities	585	-139
Leasing commissions paid	-765	-394
Net cash provided by operating activities	11,044	7,539
Cash flows from investing activities:	'	'
Acquisition of real estate and related intangible assets	-64,764	-33,488
Improvements of existing real estate	-2,934	-3,999
Proceeds from sale of real estate	11,162	'
Receipts from lenders for funds held in escrow	1,287	1,529
Payments to lenders for funds held in escrow	-5,445	-1,645
Receipts from tenants for reserves	1,519	2,261
Payments to tenants from reserves	-3,423	-1,158
Decrease (increase) in restricted cash	1,935	-1,103
Deposits on future acquisitions	-1,500	-725
Deposits applied against real estate investments	1,300	'
Net cash used in investing activities	-60,863	-38,328
Cash flows from financing activities:	'	'
Proceeds from issuance of equity	36,042	57,219
Offering costs	-2,028	-3,183
Borrowings under mortgage notes payable	27,535	3,700
Payments for deferred financing costs	-633	-209
Principal repayments on mortgage notes payable	-4,182	-3,560
Principal repayments on employee notes receivable	'	35
Borrowings from line of credit	44,250	23,700
Repayments on line of credit	-43,000	-37,500
Decrease in security deposits	-31	'
Distributions paid for common, senior common and preferred stock	-14,313	-10,936
Net cash provided by financing activities	43,640	29,266
Net decrease in cash and cash equivalents	-6,179	-1,523
Cash and cash equivalents, beginning of period	8,546	5,546
Cash and cash equivalents, end of period	2,367	4,023
NON-CASH OPERATING, INVESTING AND FINANCING INFORMATION	'	'
Fixed rate principal debt assumed in connection with acquisitions	10,147	'
Senior common dividend issued in the dividend reinvestment program	87	52
Capital improvements included in accounts payable and accrued expenses	$5,521	'

Organization_Basis_of_Presenta

Organization, Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Organization, Basis of Presentation and Significant Accounting Policies	'
	1. Organization, Basis of Presentation and Significant Accounting Policies
	Gladstone Commercial Corporation, is a real estate investment trust, or REIT, that was incorporated under the General Corporation Laws of the State of Maryland on February 14, 2003 primarily for the purpose of investing in and owning net leased industrial, commercial and retail real property and selectively making long-term industrial and commercial mortgage loans. Subject to certain restrictions and limitations, our business is managed by Gladstone Management Corporation, a Delaware corporation, or the Adviser, and administrative services are provided by Gladstone Administration, LLC, a Delaware limited liability company, or the Administrator, each pursuant to a contractual arrangement with us. Our Adviser and Administrator collectively employ all of our personnel and pay their salaries, benefits, and general expenses directly.
	Subsidiaries
	We conduct substantially all of our operations through a subsidiary, Gladstone Commercial Limited Partnership, a Delaware limited partnership, or the Operating Partnership. As we currently own all of the general and limited partnership interests of the Operating Partnership through two of our subsidiaries, GCLP Business Trust I and II, the financial position and results of operations of the Operating Partnership are consolidated with those of the Company.
	Gladstone Commercial Lending, LLC, a Delaware limited liability company, or Gladstone Commercial Lending, a subsidiary of ours, was created to conduct all operations related to real estate mortgage loans of the Company. As the Operating Partnership currently owns all of the membership interests of Gladstone Commercial Lending, the financial position and results of operations of Gladstone Commercial Lending are consolidated with ours.
	Gladstone Commercial Advisers, Inc., a Delaware corporation, or Commercial Advisers, and a wholly-owned subsidiary of ours, is a taxable REIT subsidiary, or TRS, which was created to collect any non-qualifying income related to our real estate portfolio. There has been no such income earned to date. Since we own 100% of the voting securities of Commercial Advisers, the financial position and results of operations of Commercial Advisers are consolidated with ours.
	GCLP Business Trust I and GCLP Business Trust II, each a subsidiary and business trust of ours, were formed under the laws of the Commonwealth of Massachusetts on December 28, 2005. We transferred our 99% limited partnership interest in the Operating Partnership to GCLP Business Trust I in exchange for 100 shares of the trust. Gladstone Commercial Partners, LLC transferred its 1% general partnership interest in the Operating Partnership to GCLP Business Trust II in exchange for 100 trust shares.
	All further references herein to “we,” “our,” “us” and the “Company” mean Gladstone Commercial Corporation and its consolidated subsidiaries, except where it is made clear that the term means only Gladstone Commercial Corporation.
	Interim Financial Information
	Our interim financial statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and pursuant to the requirements for reporting on Form 10-Q and in accordance with Article 10 of Regulation S-X. Accordingly, certain disclosures accompanying annual financial statements prepared in accordance with GAAP are omitted. The year-end balance sheet data presented herein was derived from audited financial statements, but does not include all disclosures required by GAAP. In the opinion of our management, all adjustments, consisting solely of normal recurring accruals, necessary for the fair presentation of financial statements for the interim period have been included. The interim financial statements and notes thereto should be read in conjunction with the financial statements and notes thereto included in our Form 10-K for the year ended December 31, 2013, as filed with the U.S. Securities and Exchange Commission on February 18, 2014. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for other interim periods or for the full fiscal year.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could materially differ from those estimates.
	Real Estate and Lease Intangibles
	We record investments in real estate at cost and capitalize improvements and replacements when they extend the useful life or improve the efficiency of the asset. We expense costs of repairs and maintenance as such costs are incurred. We compute depreciation using the straight-line method over the estimated useful life, or 39 years, for buildings and improvements, 5 to 20 years for equipment and fixtures, and the shorter of the useful life or the remaining lease term for tenant improvements and leasehold interests.
	Certain of our acquisitions involve sale-leaseback transactions with newly-originated leases, which we account for as asset acquisitions under Accounting Standards Codification, or ASC, 805, “Business Combinations.” In the case of an asset acquisition, we will capitalize the transaction costs incurred in connection with the acquisition. Other of our acquisitions involve the acquisition of properties that are already being operated as rental properties, which we will generally consider to be a business combination under ASC 805. Business combination guidance is generally applicable to us when properties are acquired with leases in place at the time of acquisition. When an acquisition is considered a business combination, ASC 805 requires that the purchase price of real estate be allocated to the acquired tangible assets and liabilities, consisting of land, building, tenant improvements, long-term debt assumed and identified intangible assets and liabilities, typically the value of above-market and below-market leases, the value of in-place leases, the value of unamortized lease origination costs and the value of tenant relationships, based in each case on their fair values. ASC 805 also requires that all expenses related to an acquisition accounted for as a business combination to be expensed as incurred, rather than capitalized into the cost of the acquisition.
	Management’s estimates of fair value are made using methods similar to those used by independent appraisers (e.g. discounted cash flow analysis). Factors considered by management in its analysis include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions and costs to execute similar leases. We also consider information obtained about each property as a result of our pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets acquired and liabilities assumed. In estimating carrying costs, management also includes lost reimbursement of real estate taxes, insurance and other operating expenses as well as estimates of lost rentals at market rates during the hypothetical expected lease-up periods, which primarily range from 9 to 18 months, depending on specific local market conditions. Management also estimates costs to execute similar leases, including leasing commissions, legal and other related expenses to the extent that such costs are not already incurred in connection with a new lease origination as part of the transaction.
	We allocate purchase price to the fair value of the tangible assets of an acquired property by valuing the property as if it were vacant. The “as-if-vacant” value is allocated to land, building and tenant improvements based on management’s determination of the relative fair values of these assets. Real estate depreciation expense on these tangible assets was $4.6 million and $9.0 million for the three and six months ended June 30, 2014, respectively, and $3.6 million and $7.0 million for the three and six months ended June 30, 2013, respectively.
	Above-market and below-market in-place lease fair values for owned properties are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. When determining the non-cancelable term of the lease, we evaluate if fixed-rate renewal options, if any, should be included. The capitalized above-market lease values, included in the accompanying condensed consolidated balance sheets as part of deferred rent receivable, are amortized as a reduction of rental income over the remaining non-cancelable terms of the respective leases. Total amortization related to above-market lease values was $0.1 million for both the three and six months ended June 30, 2014 and 2013, respectively. The capitalized below-market lease values, included in the accompanying condensed consolidated balance sheets as part of deferred rent liability, are amortized as an increase to rental income over the remaining non-cancelable terms of the respective leases, including any below market renewal periods. Total amortization related to below-market lease values was $0.2 million and $0.3 million for the three and six months ended June 30, 2014, respectively, and $0.1 million and $0.3 million for the three and six months ended June 30, 2013, respectively.
	The total amount of the remaining intangible assets acquired, which consists of in-place lease values, unamortized lease origination costs, and customer relationship intangible values, are allocated based on management’s evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant. Characteristics to be considered by management in determining these values include the nature and extent of our existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and our expectations of lease renewals (including those existing under the terms of the lease agreement), among other factors.
	The value of in-place leases and lease origination costs are amortized to expense over the remaining term of the respective leases, which generally range from 10 to 15 years. The value of customer relationship intangibles, which is the benefit to us resulting from the likelihood of an existing tenant renewing its lease, are amortized to expense over the remaining term and any anticipated renewal periods in the respective leases, but in no event does the amortization period for intangible assets exceed the remaining depreciable life of the building. Should a tenant terminate its lease, the unamortized portion of the above-market and below-market lease values would be charged to rental income and the unamortized portion of in-place lease values, lease origination costs and customer relationship intangibles will be immediately charged to amortization expense. Total amortization expense related to these intangible assets and liabilities was $2.3 million and $4.7 million for the three and six months ended June 30, 2014, respectively, and $1.6 million and $3.1 million for the three and six months ended June 30, 2013, respectively.
	Impairment Charges
	We account for the impairment of real estate, including intangible assets, in accordance with ASC 360-10-35, “Property, Plant, and Equipment,” which requires us to periodically review the carrying value of each property to determine if circumstances indicate impairment of the carrying value of the investment exists or that depreciation periods should be modified. If circumstances indicate the possibility of impairment, we prepare a projection of the undiscounted future cash flows, without interest charges, of the specific property and determine if the carrying value of the investment in such property is recoverable. In performing the analysis, we consider such factors as each tenant’s payment history and financial condition, the likelihood of lease renewal, business conditions in the industry in which the tenants operate, whether there are indications that the fair value of the real estate has decreased and our intended holding period of the property. If the carrying amount is more than the aggregate undiscounted future cash flows, we would recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value, less cost to sell, of the property. We evaluate our entire portfolio of properties each quarter for any impairment indicators and perform an impairment analysis on those select properties that have an indication of impairment.
	Deferred Financing Costs
	Deferred financing costs consist of costs incurred to obtain financing, including legal fees, origination fees and administrative fees. The costs are deferred and amortized using the straight-line method, which approximates the effective interest method, over the term of the secured financing. We made payments of $0.3 million and $0.6 million for deferred financing costs during the three and six months ended June 30, 2014, respectively, and payments of $0.1 million and $0.2 million during the three and six months ended June 30, 2013, respectively. Total amortization expense related to deferred financing costs is included in interest expense and was $0.4 million and $0.8 million for both the three and six months ended June 30, 2014 and 2013, respectively.
	Revenue Recognition
	Rental revenue includes rents that each tenant pays in accordance with the terms of its respective lease reported evenly over the non-cancelable term of the lease. Most of our leases contain rental increases at specified intervals. We recognize such revenues on a straight-line basis. Deferred rent receivable in the accompanying condensed consolidated balance sheet includes the cumulative difference between rental revenue, as recorded on a straight-line basis, and rents received from the tenants in accordance with the lease terms, along with the capitalized above-market in-place lease values of certain acquired properties. Accordingly, we determine, in our judgment, to what extent the deferred rent receivable applicable to each specific tenant is collectable. We review deferred rent receivable, as it relates to straight line rents, on a quarterly basis and take into consideration the tenant’s payment history, the financial condition of the tenant, business conditions in the industry in which the tenant operates and economic conditions in the geographic area in which the property is located. In the event that the collectability of deferred rent with respect to any given tenant is in doubt, we record an allowance for uncollectable accounts or record a direct write-off of the specific rent receivable. No such reserves or direct write-offs have been recorded to date.
	Tenant recovery revenue includes payments from tenants as reimbursements for franchise taxes, management fees, insurance, and ground lease payments. We recognize tenant recovery revenue in the same periods that we incur the related expenses.
	Asset Retirement Obligations
	ASC 410, “Asset Retirement and Environmental Obligation,” requires an entity to recognize a liability for a conditional asset retirement obligation when incurred if the liability can be reasonably estimated. ASC 410-20-20 clarifies that the term “Conditional Asset Retirement Obligation” refers to a legal obligation (pursuant to existing laws or by contract) to perform an asset retirement activity in which the timing and/or method of settlement are conditional on a future event that may or may not be within the control of the entity. ASC 410-20-25-6 clarifies when an entity would have sufficient information to reasonably estimate the fair value of an asset retirement obligation. We have accrued a liability and corresponding increase to the cost of the related properties for disposal related to all properties constructed prior to 1985 that have, or may have, asbestos present in the building. The liabilities are accreted over the life of the leases for the respective properties. There were no liabilities accrued during the six months ended June 30, 2014 and 2013, respectively. We recorded expenses of $0.04 million and $0.07 million during the three and six months ended June 30, 2014, respectively, and $0.03 million and $0.06 million during the three and six months ended June 30, 2013, respectively, to general and administrative expense. Costs of future expenditures for obligations are discounted to their present value. The aggregate undiscounted obligation on all properties is $9.2 million and the discount rates used in the calculations range from 2.5% to 7.6%. We do not expect to make any payments in conjunction with these obligations in each of the next five years.
	Comprehensive Loss
	For the three and six months ended June 30, 2014 and 2013, comprehensive loss equaled net loss; therefore, a separate statement of comprehensive loss is not included in the accompanying condensed consolidated financial statements.
	Recently Issued Accounting Guidance
	The Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” Under this revised guidance, only disposals representing a strategic shift in operations, such as a disposal of a major geographic area, a major line of business or a major equity method investment, will be presented as discontinued operations. This standard is effective for our fiscal year beginning January 1, 2015; however, the FASB has permitted early adoption beginning with the first quarter of 2014. We adopted this standard as of March 31, 2014. We anticipate the adoption will result in most disposals not qualifying for discontinued operations presentation.
	In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards, “Revenue from Contracts with Customers (ASC 606).” The revenue standard contains principles that an entity will apply to determine the measurement of revenue and timing of when it is recognized. This standard is effective for our fiscal year beginning January 1, 2017 and we are currently evaluating any impact from adoption.

RelatedParty_Transactions

Related-Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	2. Related-Party Transactions
	Gladstone Management and Gladstone Administration
	We are externally managed pursuant to contractual arrangements with our Adviser and our Administrator which collectively employ all of our personnel and pay their salaries, benefits, and general expenses directly. We have an advisory agreement with our Adviser, or the Advisory Agreement, and an administration agreement with our Administrator, or the Administration Agreement. The management and administrative services and fees under the Advisory and Administration Agreements are described below. At June 30, 2014 and December 31, 2013, $1.7 million and $1.4 million, respectively, was collectively due to our Adviser and Administrator.
	Advisory Agreement
	The Advisory Agreement provides for an annual base management fee equal to 2% of our total stockholders’ equity, less the recorded value of any preferred stock and adjusted to exclude the effect of any unrealized gains, losses or other items that do not affect realized net income (including impairment charges), or common stockholders’ equity, and an incentive fee based on funds from operations, or FFO. For the three and six months ended June 30, 2014, we recorded a base management fee of $0.7 million and $1.3 million, respectively, and for the three and six months ended June 30, 2013, we recorded a base management fee of $0.5 million and $0.8 million, respectively.
	For purposes of calculating the incentive fee, FFO includes any realized capital gains and capital losses, less any distributions paid on preferred stock and senior common stock, but FFO does not include any unrealized capital gains or losses (including impairment charges). The incentive fee rewards the Adviser if our quarterly FFO, before giving effect to any incentive fee, or pre-incentive fee FFO, exceeds 1.75%, or 7% annualized, or the hurdle rate, of total common stockholders’ equity. The Adviser receives 100% of the amount of the pre-incentive fee FFO that exceeds the hurdle rate, but is less than 2.1875% of our common stockholders’ equity. The Adviser also receives an incentive fee of 20% of the amount of our pre-incentive fee FFO that exceeds 2.1875% of common stockholders’ equity.
	For the three and six months ended June 30, 2014, we recorded an incentive fee of $1.5 million and $2.8 million, respectively, offset by credits related to unconditional, voluntary and irrevocable waivers issued by the Adviser of $1.0 million and $2.2 million, respectively, resulting in a net incentive fee for the three and six months ended June 30, 2014, of $0.5 million and $0.6 million, respectively. For the three and six months ended June 30, 2013, we recorded an incentive fee of $0.9 million and $1.9 million, respectively, offset by credits related to unconditional, voluntary and irrevocable waivers issued by the Adviser of $0.9 million and $1.5 million, respectively, resulting in a net incentive fee for the three and six months ended June 30, 2013, of $0.0 million and $0.4 million, respectively. Our Board of Directors accepted the Adviser’s offer to waive, on a quarterly basis, a portion of the incentive fee for the three and six months ended June 30, 2014 and 2013, to support the current level of distributions to all classes of our stockholders. This waiver may not be recouped by the Adviser in the future.
	Administration Agreement
	Pursuant to the Administration Agreement, we pay for our allocable portion of the Administrator’s overhead expenses in performing its obligations to us, including, but not limited to, rent and the salaries and benefits of its personnel, including our chief financial officer and treasurer, chief compliance officer, general counsel and secretary, and their respective staffs. Our general counsel and secretary also serves as our Administrator’s president. Our allocable portion of expenses is derived by multiplying the Administrator’s total allocable expenses by the percentage of our total assets at the beginning of each quarter in comparison to the total assets of all companies managed by the Adviser under similar agreements. For the three and six months ended June 30, 2014, we recorded an administration fee of $0.5 million and $1.0 million, respectively, and for the three and six months ended June 30, 2013, we recorded an administration fee of $0.4 million and $0.7 million, respectively.
	Gladstone Securities
	Gladstone Securities, LLC, or Gladstone Securities, is a privately held broker dealer registered with The Financial Industry Regulatory Authority and insured by the Securities Investor Protection Corporation. Gladstone Securities is an affiliate of ours, as its parent company is controlled by Mr. David Gladstone, our chairman and chief executive officer. Mr. Gladstone also serves on the board of managers of Gladstone Securities.
	Dealer Manager Agreement
	In connection with the offering of our senior common stock (see Note 9, “Stockholders’ Equity,” for further details) we entered into a Dealer Manager Agreement, dated March 25, 2011, or the Dealer Manager Agreement, with Gladstone Securities pursuant to which Gladstone Securities agreed to act as our exclusive dealer manager in connection with the offering. Pursuant to the terms of the Dealer Manager Agreement, Gladstone Securities is entitled to receive a sales commission in the amount of 7.0% of the gross proceeds of the shares of senior common stock sold, plus a dealer manager fee in the amount of 3.0% of the gross proceeds of the shares of senior common stock sold. Gladstone Securities, in its sole and absolute discretion, may re-allocate all of its selling commissions attributable to a participating broker-dealer and may also re-allocate a portion of its dealer manager fee earned in respect of the proceeds generated by the participating broker-dealer to any participating broker-dealer as a non-accountable marketing allowance. In addition, we have agreed to indemnify Gladstone Securities against various liabilities, including certain liabilities arising under the federal securities laws. We made approximately $0.05 million and $0.1 million of payments during the three and six months ended June 30, 2014 respectively, and we made approximately $0.1 million and $0.2 million of payments during the three and six months ended June 30, 2013, respectively, to Gladstone Securities pursuant to this agreement, which are reflected as a component of senior common stock costs in the statement of stockholders’ equity. The Dealer Manager Agreement currently is scheduled to terminate on the earlier of (i) March 28, 2015 or (ii) the date on which 3,000,000 shares of senior common stock are sold pursuant to the Dealer Manager Agreement.
	Mortgage Financing Arrangement Agreement
	We also entered into an agreement with Gladstone Securities, effective June 18, 2013, for it to act as our non-exclusive agent to assist us with arranging mortgage financing for properties we own. In connection with this engagement, Gladstone Securities may from time to time solicit the interest of various commercial real estate lenders or recommend to us third party lenders offering credit products or packages that are responsive to our needs. We pay Gladstone Securities a financing fee in connection with the services it provides to us for securing mortgage financing on any of our properties. The amount of these financing fees, which are payable upon closing of the financing, are based on a percentage of the amount of the mortgage, generally ranging from 0.5% to a maximum of 1.0% of the mortgage obtained. The amount of the financing fees may be reduced or eliminated, as determined by us and Gladstone Securities, after taking into consideration various factors, including, but not limited to, the involvement of any third party brokers and market conditions. We paid financing fees of $0.07 million during the three and six months ended June 30, 2014. We did not pay any financing fees during the three and six months ended June 30, 2013. The agreement, which was scheduled to terminate on August 31, 2014, was renewed for another year at the approval of our Board of Directors. It is now scheduled to terminate on August 31, 2015, unless renewed or earlier terminated.

Earnings_Loss_Per_Share_of_Com

Earnings (Loss) Per Share of Common Stock	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings (Loss) Per Share of Common Stock	'
	3. Earnings (Loss) per Share of Common Stock
	The following tables set forth the computation of basic and diluted earnings (loss) per share of common stock for the three and six months ended June 30, 2014 and 2013, respectively. We computed basic earnings (loss) per share for the three and six months ended June 30, 2014 and 2013, respectively, using the weighted average number of shares outstanding during the periods. Diluted earnings (loss) per share for the three and six months ended June 30, 2014 and 2013, reflects additional shares of common stock, related to our convertible senior common stock, that would have been outstanding if dilutive potential shares of common stock had been issued, as well as an adjustment to net income available to common stockholders as applicable to common stockholders that would result from their assumed issuance(dollars in thousands, except per share amounts).
			For the three months ended June 30,					For the six months ended June 30,
			2014		2013			2014			2013
	Calculation of basic earnings (loss) per share of common stock:
	Net earnings (loss) available (attributable) to common stockholders		$	86	$	(641	)	$	(14,554	)	$	(1,286	)
	Denominator for basic weighted average shares of common stock			16,547,793		12,380,402			16,149,467			11,808,701
	Basic earnings (loss) per share of common stock		$	0.01	$	(0.05	)	$	(0.90	)	$	(0.11	)
	Calculation of diluted earnings (loss) per share of common stock:
	Net income (loss) available (attributable) to common stockholders		$	86	$	(641	)	$	(14,554	)	$	(1,286	)
	Add: Income impact of assumed conversion of senior common stock (1)			110		—			—			—
	Net income (loss) available (attributable) to common stockholders plus assumed conversions		$	196	$	(641	)	$	(14,554	)	$	(1,286	)
	Denominator for basic weighted average shares of common stock			16,547,793		12,380,402			16,149,467			11,808,701
	Effect of convertible senior common stock (1)			347,180		—			—			—
	Denominator for diluted weighted average shares of common stock			16,894,973		12,380,402			16,149,467			11,808,701
	Diluted earnings (loss) per share of common stock		$	0.01	$	(0.05	)	$	(0.90	)	$	(0.11	)
	(1)	We excluded convertible senior common shares of 332,608 from the calculation of diluted earnings per share for the six months ended June 30, 2014 because it was anti-dilutive. We also excluded 195,759, and 180,753, from the calculation of diluted earnings per share for the three and six months ended June 30, 2013, respectively, because it was anti-dilutive.

Real_Estate_and_Intangible_Ass

Real Estate and Intangible Assets	6 Months Ended
	Jun. 30, 2014
Property Plant And Equipment [Abstract]	'
Real Estate and Intangible Assets	'
	4. Real Estate and Intangible Assets
	Real Estate
	The following table sets forth the components of our investments in real estate as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			June 30, 2014			December 31, 2013
	Real estate:
	Land		$	83,352		$	79,153
	Building and improvements			561,138			527,230
	Tenant improvements			39,511			35,970
	Accumulated depreciation			(88,520	)		(81,241	)
	Real estate, net		$	595,481		$	561,112
	2014 Real Estate Activity
	During the six months ended June 30, 2014, we acquired six properties, which are summarized in the table below (dollars in thousands):
	Location		Acquisition Date			Square Footage			Lease Term		Renewal Options	Total Purchase			Acquisition		Annualized Straight		Debt Issued &
												Price			Expenses		Line Rent		Assumed
	Allen, TX			3/27/14			21,154		12 Years		4 (5 years each)	$	5,525		$	29	$	570	$	3,481
	Colleyville, TX			3/27/14			20,355		12 Years		4 (5 years each)		4,523			29		467		2,849
	Rancho Cordova, CA			4/22/14			61,358		10 Years		1 (5 year)		8,225			65		902		4,935
	Coppell, TX			5/8/14			21,171		12 Years		4 (5 years each)		5,838			22		601		3,816
	Columbus, OH			5/13/14			114,786		9.5 Years		N/A		11,800			65		1,278		N/A
	Taylor, PA			6/9/14			955,935		10 Years		4 (5 years each)		39,000			714		3,400		22,600
	Total						1,194,759					$	74,911		$	924	$	7,218	$	37,681
	In accordance with ASC 805, we determined the fair value of the acquired assets related to the six properties acquired during the six months ended June 30, 2014 as follows (in thousands):
			Land			Building			Tenant			In-place			Leasing		Customer		Above Market		Below Market			Premium on			Total Purchase
									Improvements			Leases			Costs		Relationships		Leases		Leases			Assumed Debt			Price
	Allen, TX		$	874		$	3,509		$	125		$	598		$	273	$	218	$	—	$	—		$	(72	)	$	5,525
	Colleyville, TX			1,277			2,307			117			486			220		181		—		(6	)		(59	)		4,523
	Rancho Cordova, CA			752			5,898			278			473			546		278		—		—			—			8,225
	Coppell, TX			1,448			3,221			128			636			293		230		—		—			(118	)		5,838
	Columbus, OH			990			6,080			1,937			823			719		990		261		—			—			11,800
	Taylor, PA			3,102			24,449			956			6,171			1,452		2,870		—		—			—			39,000
			$	8,443		$	45,464		$	3,541		$	9,187		$	3,503	$	4,767	$	261	$	(6	)	$	(249	)	$	74,911
	Below is a summary of the total revenue and earnings recognized on the six properties acquired during the three and six months ended June 30, 2014 (dollars in thousands):
						For the three months ended June 30,						For the six months ended June 30,
						2014						2014
	Location		Acquisition			Rental Revenue			Earnings (1)			Rental Revenue			Earnings (1)
			Date
	Allen, TX			3/27/14		$	142		$	81		$	150		$	86
	Colleyville, TX			3/27/14			117			67			123			71
	Rancho Cordova, CA			4/22/14			173			65			173			65
	Coppell, TX			5/8/14			89			52			89			52
	Columbus, OH			5/13/14			167			68			167			68
	Taylor, PA			6/9/14			208			98			208			98
						$	896		$	431		$	910		$	440
	-1	Earnings is calculated as net income exclusive of both interest expense and acquisition related costs that are required to be expensed under ASC 805.
	Pro Forma
	The following table reflects pro-forma consolidated statements of operations as if the six properties acquired during the three and six months ended June 30, 2014 were acquired as of the beginning of the previous period. The pro-forma earnings for the three and six months ended June 30, 2014 and 2013 were adjusted to assume that acquisition-related costs were incurred as of the beginning of the previous period (dollars in thousands, except per share amounts):
			For the three months ended June 30,						For the six months ended June 30,
			2014			2013			2014			2013
			(unaudited)						(unaudited)
	Operating Data:
	Total operating revenue		$	19,339		$	18,822		$	38,316		$	37,628
	Total operating expenses			(10,986	)		(11,090	)		(35,799	)(1)		(21,608	)
	Other expenses			(6,202	)		(7,566	)		(13,655	)		(15,355	)
	Net income (loss)			2,151			166			(11,138	)		665
	Dividends attributable to preferred and senior common stock			(1,133	)		(1,092	)		(2,257	)		(2,169	)
	Net income (loss) available (attributable) to common stockholders		$	1,018		$	(926	)	$	(13,395	)	$	(1,504	)
	Share and Per Share Data:
	Basic and diluted earnings (loss) per share of common stock		$	0.06		$	(0.07	)	$	(0.83	)	$	(0.13	)
	Weighted average shares outstanding-basic			16,547,793			12,380,402			16,149,467			11,808,701
	Weighted average shares outstanding-diluted			16,894,973			12,380,402			16,149,467			11,808,701
	-1	$14.0 million relates to the impairment charge recorded in operating expenses during the three months ended March 31, 2014.
	2013 Real Estate Activity
	During the six months ended June 30, 2013, we acquired three properties and completed an expansion of one property, which are summarized below (dollars in thousands):
Location		Acquisition/			Square Footage			Lease		Renewal Options	Total Purchase/			Acquistion		Annualized Straight		Debt
		Expansion Date						Term			Expansion Price			Expenses		Line Rent		Issued
Egg Harbor Township, NJ			3/28/13			29,257		10 years		1 (5 years)	$	5,650		$	152	$	490	$	3,700
Clintonville, WI (1)			4/11/13			102,400		15 years		N/A		3,250			N/A		961		—
Vance, AL			5/8/13			170,000		10 years		2 (5 year options)		13,388			186		1,173		—
Blaine, MN			5/10/13			92,275		6.9 years		2 (5 year options)		14,450			79		1,475		—
Total						393,932					$	36,738		$	417	$	4,099	$	3,700
(1)	The Clintonville, WI property was originally acquired in November 2005 for $5.3 million. After the expansion completed in April 2013, the total investment in the property is $8.6 million.
In accordance with ASC 805, we determined the fair value of acquired assets related to the three properties acquired during the six months ended June 30, 2013 as follows (in thousands):
		Land			Building			Tenant			In-place			Leasing Costs		Customer		Total Purchase
								Improvements			Leases					Relationships		Price
Egg Harbor Township, NJ		$	1,627		$	2,735		$	282		$	558		$	189	$	259	$	5,650
Vance, AL			457			9,721			808			1,097			678		627		13,388
Blaine, MN			1,060			9,347			1,172			1,361			694		816		14,450
		$	3,144		$	21,803		$	2,262		$	3,016		$	1,561	$	1,702	$	33,488
Below is a summary of the total revenue and earnings recognized on the three properties acquired during the six months ended June 30, 2013 (dollars in thousands):
Location		Acquisition			For the three months ended June 30, 2013						For the six months ended June 30, 2013
		Date			Rental Revenue			Earnings (1)			Rental Revenue			Earnings (1)
Egg Harbor Township, NJ			3/28/13		$	122		$	69		$	128		$	72
Vance, AL			5/8/13			170			70			170			70
Blaine, MN			5/10/13			210			94			210			94
					$	502		$	233		$	508		$	236
(1)	Earnings is calculated as net income less interest expense and acquisition related costs that are required to be expensed under ASC 805.
Future Lease Payments
Future operating lease payments from tenants under non-cancelable leases, excluding tenant reimbursement of expenses, for the remainder of 2014 and each of the five succeeding fiscal years and thereafter is as follows (dollars in thousands):
Year		Tenant
		Lease Payments
Six Months ending December 31, 2014		$	34,255
2015			65,830
2016			63,228
2017			62,763
2018			61,125
2019			61,469
Thereafter			274,216
Significant Existing Real Estate Activity
On April 4, 2014, our tenant occupying our Newburyport, Massachusetts property notified us of their intention not to exercise their renewal option as the tenant is relocating to Rhode Island. The tenant will continue paying rent and operating expenses through the lease termination date of April 30, 2015.
On May 6, 2014, we extended the lease with the tenant occupying our property located in Austin, Texas. The lease covering this property was extended for an additional eight years, through June 2022. The lease was originally set to expire in June 2015. The lease provides for prescribed rent escalations over the life of the lease, with annualized straight line rents of approximately $0.7 million. In connection with the extension of the lease and modification of certain terms of the lease, we paid $0.2 million in leasing commissions, and will pay $1.3 million in tenant improvements between now and second quarter 2015.
On June 11, 2014, we extended the lease with the tenant occupying our property located in Burnsville, Minnesota. The new lease covers approximately two-thirds of the space and was extended for an additional eight years, through January 2023. The lease was originally set to expire in June 2015. The tenant in this property will continue to pay rent on the entire building through June 2015, and we are working to identify tenants to lease the remainder of the building. The new lease provides for prescribed rent escalations over the life of the lease, with annualized straight line rents of $1.0 million. Rental income per square foot increased 14% from the previous lease. The lease grants the tenant two options to extend the lease for an additional 3 years each. In connection with the extension of the lease and the modification of certain terms under the lease, we paid $0.5 million in leasing commissions, and will pay $3.3 million in tenant improvements between now and first quarter 2015.
Intangible Assets
The following table summarizes the carrying value of intangible assets and the accumulated amortization for each intangible asset class (dollars in thousands):
		June 30, 2014						December 31, 2013
		Lease			Accumulated			Lease			Accumulated
		Intangibles			Amortization			Intangibles			Amortization
In-place leases		$	56,521		$	(17,205	)	$	47,442		$	(15,158	)
Leasing costs			35,251			(10,680	)		31,339			(9,323	)
Customer relationships			39,896			(11,654	)		35,739			(10,407	)
		$	131,668		$	(39,539	)	$	114,520		$	(34,888	)
The weighted average amortization periods in years for the intangible assets acquired and liabilities assumed during the six months ended June 30, 2014 and 2013, respectively, were as follows
Intangible Assets & Liabilities		2014			2013
In-place leases			10.7			9.3
Leasing costs			10.7			9.3
Customer relationships			15.6			14.2
Above market leases			8.2			—
Below market leases			11.9			—
All intangible assets & liabilities			12.2			10.9
The estimated aggregate amortization expense for the remainder of 2014 and for each of the five succeeding fiscal years and thereafter is as follows (dollars in thousands):
Year		Estimated
		Amortization Expense
Six Months ending December 31, 2014		$	5,834
2015			11,395
2016			10,732
2017			10,539
2018			10,251
2019			10,243
Thereafter			33,135

Real_Estate_Held_for_Sale_and_

Real Estate Held for Sale and Impairment Charges	6 Months Ended
	Jun. 30, 2014
Real Estate [Abstract]	'
Real Estate Held for Sale and Impairment Charges	'
	5. Real Estate Held for Sale and Impairment Charges
	Real Estate Held for Sale
	As of March 31, 2014, we classified our property located in Sterling Heights, Michigan as held for sale under the provisions of ASC 360-10, which requires that the assets and liabilities of any properties which are held for sale, be presented separately in our condensed consolidated balance sheet in the current period presented. On June 6, 2014, we sold the property to the tenant currently occupying the building for $11.4 million and recognized a gain of $1.2 million on the sale.
	The table below summarizes the components of income from real estate and related assets held for sale for the three and six months ended June 30, 2014 and June 30, 2013, respectively:
		For the three months ended June 30,				For the six months ended June 30,
		2014		2013		2014		2013
	Operating revenue	$	215	$	292	$	507	$	583
	Operating expense		1		57		40		114
	Income from real estate and related assets held for sale	$	214	$	235	$	467	$	469
	Impairment Charges
	We performed the evaluation and analysis of our portfolio and concluded that our Roseville, Minnesota property was impaired as of March 31, 2014. We determined that the expected undiscounted cash flows based upon a revised estimated holding period of this property was below the current carrying value. The estimated holding period was revised after a potential tenant that we were anticipating to lease a large portion of the vacant space, during the three months ended March 31, 2014, did not execute a lease on the property. Consequently, we revised the holding period to coincide with the maturity of the mortgage loan in June 2014. Accordingly, we reduced the carrying value of this property to its estimated fair value, less cost to sell, and we recognized an impairment loss of $14.0 million during the three months ended March 31, 2014.
	We also determined our property located in South Hadley, Massachusetts is at risk to become impaired in the future. We recently extended the lease on the property for one year, and it now expires in January 2015. There is a possibility we may have to impair this 150,000 square foot industrial property in 2014 if we do not negotiate another lease extension on this building or find a replacement tenant.
	We will continue to monitor our portfolio for any other indicators of impairment.

Mortgage_Notes_Payable_and_Lin

Mortgage Notes Payable and Line of Credit	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Mortgage Notes Payable and Line of Credit	'
	6. Mortgage Notes Payable and Line of Credit
	Our mortgage notes payable and line of credit as of June 30, 2014 and December 31, 2013 are summarized below (dollars in thousands):
							Carrying Value at
			Encumbered				June 30, 2014				December 31, 2013			Stated Interest		Scheduled Maturity
			properties at											Rates at June 30,		Dates at June 30,
			June 30, 2014											2014 (4)		2014
	Mortgage and Other Secured Loans:
	Fixed rate mortgage loans			71			$	447,178			$	413,678		-1		-2
	Variable rate mortgage loans			4				8,200				8,200		LIBOR+2.15% (3)		12/1/16
	Premiums and discounts (net)			N/A				859				724		N/A		N/A
	Total Mortgage Notes Payable			75			$	456,237			$	422,602
	Variable rate Line of Credit			16				25,650				24,400		LIBOR+3.00% (3)		8/1/17
	Total Mortgage Notes Payable and Line of Credit			91			$	481,887			$	447,002
	-1	Interest rates on our fixed rate mortgage notes payable vary from 4.04% to 6.80%.
	-2	We have 40 mortgage notes payable with maturity dates ranging from 9/1/2015 through 1/06/2039.
	-3	At June 30, 2014, one month LIBOR was approximately 0.1552%.
	-4	The weighted average interest rate on all debt outstanding at June 30, 2014, was approximately 5.25%.
	N/A - Not Applicable
	Mortgage Notes Payable
	As of June 30, 2014, we had 40 mortgage notes payable, which were collateralized by a total of 75 properties with a net book value of $607.8 million. Gladstone Commercial Corporation has limited recourse liabilities that could result from any one or more of the following circumstances: a borrower voluntarily filing for bankruptcy, improper conveyance of a property, fraud or material misrepresentation, misapplication or misappropriation of rents, security deposits, insurance proceeds or condemnation proceeds, or physical waste or damage to the property resulting from a borrower’s gross negligence or willful misconduct. We will also indemnify lenders against claims resulting from the presence of hazardous substances or activity involving hazardous substances in violation of environmental laws on a property. The weighted-average interest rate on the mortgage notes payable as of June 30, 2014 was 5.36%.
	During the six months ended June 30, 2014, we assumed two long-term mortgages, collateralized by three properties, and issued two long-term mortgages, collateralized by two properties, which are summarized below (dollars in thousands):
	Date of Issuance		Issuing Bank		Debt Issued				Interest Rate				Maturity Date
	3/27/14		Wells Fargo N.A.		$	6,330				5.58	%		2/1/16
	4/22/14		Keybank N.A.			4,935				4.9	%		5/1/24
	5/8/14		Wells Fargo N.A.			3,816				6.25	%		6/1/16
	6/9/14		Prudential Mortgage Capital Company			22,600				4.23	%		7/1/19
					$	37,681
	Scheduled principal payments of mortgage notes payable for the remainder of 2014, and each of the five succeeding fiscal years and thereafter are as follows (dollars in thousands):
	Year		Scheduled Principal
			Payments
	Six Months ending December 31, 2014		$	20,798
	2015			42,683
	2016			98,702
	2017			67,201
	2018			19,789
	2019			34,449
	Thereafter			171,756
			$	455,378
	Interest Rate Cap
	In November 2013, we entered into an interest rate cap agreement with Wells Fargo that caps the interest rate on the note payable for our Champaign, Illinois property. The agreement provides that the interest rate on the note payable for this property is capped at a certain interest rate when one-month LIBOR is in excess of 3.0%. The fair value of the interest rate cap agreement is recorded in other assets on our accompanying condensed consolidated balance sheets. We record changes in the fair value of the interest rate cap agreement quarterly based on the current market valuations at quarter end as other income (loss) on our accompanying condensed consolidated statements of operations. Generally, we will estimate the fair value of our interest rate cap using estimates of value provided by the counterparty and our own assumptions in the absence of observable market data, including estimated remaining life, counterparty credit risk, current market yield and interest rate spreads of similar securities as of the measurement date. At June 30, 2014, our interest rate cap agreement was valued using Level 3 inputs of the hierarchy established by ASC 820, “Fair Value Measurements and Disclosures.” The following table summarizes the key terms of each interest rate cap agreement (dollars in thousands):
																	As of June 30,
																	2014
	Interest Rate Cap		Notional				LIBOR Cap				Effective Date			Maturity Date			Cost		Fair Value
			Amount
	November 26, 2013		$	8,200				3	%			June 30, 2014			December 1, 2016		$	31	$	7
	Fair Value
	The fair value of all mortgage notes payable outstanding as of June 30, 2014, was $462.1 million, as compared to the carrying value stated above of $456.2 million. The fair value is calculated based on a discounted cash flow analysis, using interest rates based on management’s estimate of market interest rates on long-term debt with comparable terms and loan to value ratios. The fair value was calculated using Level 3 inputs of the hierarchy established by ASC 820, “Fair Value Measurements and Disclosures.”
	Line of Credit
	In August 2013, we procured a $60.0 million senior unsecured revolving credit facility, or the Line of Credit, with KeyBank National Association (serving as a revolving lender, a letter of credit issuer and administrative agent) and Citizens Bank of Pennsylvania as an additional lender. On December 16, 2013, Comerica Bank was also added as an additional lender. On March 28, 2014, we amended our Line of Credit to extend the maturity date one additional year to August 2017. We also modified certain terms under the Line of Credit, including the calculation of the total asset value and unencumbered asset value. The applicable LIBOR margins were also reduced by 25 basis points at each pricing level. As a result of these modifications, the availability under our line of credit increased by $1.3 million.
	The Line of Credit initially matures in August 2017; however, we have a one-year extension option subject to the payment of an extension fee equal to 25 basis points on the initial maturity date and certain other customary conditions.
	The Line of Credit has a letter of credit sublimit of up to $20.0 million. In addition, we may expand the Line of Credit up to a total of $75.0 million upon satisfaction of certain conditions, including obtaining commitments from any one or more lenders, whether or not currently a party to the Line of Credit, to provide such increased amounts and payment of the associated up front and arrangement fees at the time of such increase. The interest rate per annum applicable to the Line of Credit is equal to the LIBOR plus an applicable margin of up to 3.0%, depending upon our leverage. The leverage ratio used in determining the applicable margin for interest on the Line of Credit is recalculated quarterly. We are subject to an annual maintenance fee of $0.03 million per year and an unused commitment fee of 25 basis points per year, which accrues quarterly. Our ability to access this source of financing is subject to our continued ability to meet customary lending requirements, such as compliance with financial and operating covenants and our meeting certain lending limits. One such covenant requires us to limit distributions to our stockholders to 100% of our FFO, with acquisition-related costs required to be expensed under ASC 805 added back to FFO. In addition, the maximum amount we may draw under the Line of Credit is based on a percentage of the value of a pool of unencumbered properties which must meet agreed upon eligibility standards.
	If and when long-term mortgages are arranged for properties in the unencumbered pool, the banks will reduce the availability under the Line of Credit by the amount advanced against that property’s value. Conversely, as we purchase new properties meeting the eligibility standards, we may add these new properties to the unencumbered pool to obtain additional availability under the Line of Credit. The availability under the Line of Credit is also reduced by letters of credit used in the ordinary course of business. We may use the advances under the Line of Credit for both general corporate purposes and the acquisition of new investments.
	As of June 30, 2014, there was $25.7 million outstanding under our Line of Credit at an interest rate of approximately 3.2% and $6.8 million outstanding under letters of credit at a weighted average interest rate of 3.0%. As of June 30, 2014, the maximum additional amount we could draw was $19.7 million. We were in compliance with all covenants under the Line of Credit as of June 30, 2014. The amount outstanding on the Line of Credit as of June 30, 2014 approximates fair value, because the debt is subject to a variable interest rate, determined by market forces, as well as a recently negotiated interest rate spread.

Mandatorily_Redeemable_Preferr

Mandatorily Redeemable Preferred Stock	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Mandatorily Redeemable Preferred Stock	'
	7. Mandatorily Redeemable Preferred Stock
	In February 2012, we completed a public offering of 1,540,000 shares of 7.125% Series C Cumulative Term Preferred Stock, par value $0.001 per share, or the Term Preferred Stock, at a public offering price of $25.00 per share. Gross proceeds of the offering totaled $38.5 million and net proceeds, after deducting offering expenses borne by us, were $36.7 million and were used to repay a portion of outstanding borrowings under our Line of Credit, for acquisitions of real estate and for working capital. The Term Preferred Stock is traded under the ticker symbol GOODN on the NASDAQ Global Select Market, or the NASDAQ. The Term Preferred Stock is not convertible into our common stock or any other security of ours. Generally, we may not redeem shares of the Term Preferred Stock prior to January 31, 2016, except in limited circumstances to preserve our status as a REIT. On or after January 31, 2016, we may redeem the shares at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends to and including the date of redemption. The shares of the Term Preferred Stock have a mandatory redemption date of January 31, 2017. We incurred $1.8 million in total offering costs related to these transactions, which have been recorded as deferred financing costs on the condensed consolidated balance sheet and will be amortized over the redemption period ending January 31, 2017.
	The Term Preferred Stock is recorded as liability in accordance with ASC 480, “Distinguishing Liabilities from Equity,” which states that mandatorily redeemable financial instruments should be classified as liabilities and therefore the related dividend payments are treated as a component of interest expense in the condensed consolidated statements of operations.
	The fair value of our Term Preferred Stock as of June 30, 2014, was $40.2 million, as compared to the carrying value stated above of $38.5 million. The fair value is calculated based on the closing share price as of June 30, 2014 of $26.10. The fair value was calculated using Level 1 inputs of the hierarchy established by ASC 820, “Fair Value Measurements and Disclosures.”

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	8. Commitments and Contingencies
	Ground Leases
	We are obligated as lessee under three ground leases. Future minimum rental payments due under the terms of these leases for the remainder of 2014 and each of the five succeeding years and thereafter, are as follows (dollars in thousands):
						For the year ended December 31,
	Location		Lease End Date			2014		2015		2016		2017		2018		2019		Thereafter
	Tulsa, OK			21-Apr		$	76	$	153	$	153	$	153	$	153	$	153	$	229
	Dartmouth, MA			May-36			87		174		174		174		174		174		3,300
	Springfield, MA			Feb-30			43		86		86		89		90		90		972
						$	206	$	413	$	413	$	416	$	417	$	417	$	4,501
	Rental expense for the properties listed above is recorded straight-line over the term of the lease and was $0.2 million during both the six months ended June 30, 2014 and 2013. Rental expenses are reflected in property operating expenses on the condensed consolidated statements of operations.
	Tenant Improvements
	We have committed to provide tenant improvement funding for certain properties. The following table reflects unconditional purchase obligations which have not been recognized on the balance sheet as of June 30, 2014. In addition, we have committed to provide financing to expand our building located in Canton, North Carolina. Future tenant improvement payments due on these properties for the remainder of 2014 and each of the five succeeding years and thereafter, are as follows (dollars in thousands):
						For the year ended December 31,
	Location		Lease End Date			2014		2015		2016		2017		2018		2019		Thereafter
	Canton, NC			24-Jul	(1)	$	1,306	$	—	$	—	$	—	$	—	$	—	$	—
	Concord Township, OH			Aug-34			150		—		—		—		—		—		—
	Egg Harbor Township, NJ			23-Apr			229		—		—		—		—		—		—
						$	1,685	$	—	$	—	$	—	$	—	$	—	$	—
	(1)	Upon completion of expansion of this property, currently projected to be September of 2014, the lease will be extended for 20 years, through September 2034.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Stockholders' Equity	'
	9. Stockholders’ Equity
	The following table summarizes the changes in our stockholders’ equity for the six months ended June 30, 2014 (dollars in thousands):
		Preferred		Senior Common		Common				Additional		Notes			Distributions in			Total
		Stock		Stock		Stock				Paid in		Receivable			Excess of			Stockholders’
										Capital		from Employees			Accumulated			Equity
															Earnings
	Balance at December 31, 2013	$	2	$	—	$	16			$	298,751	$	(375	)	$	(115,248	)	$	183,146
	Issuance of senior common stock and common stock, net		—		—		2				34,099		—			—			34,101
	Distributions declared to common, senior common and preferred stockholders		—		—		—				—		—			(14,400	)		(14,400	)
	Net loss		—		—		—				—		—			(12,297	)		(12,297	)
	Balance at June 30, 2014	$	2	$	—	$	18			$	332,850	$	(375	)	$	(141,945	)	$	190,550
	Distributions
	Our Board of Directors declared the following distributions per share for the three and six months ended June 30, 2014 and 2013:
		For the three months ended June 30,				For the six months ended June 30,
		2014		2013		2014				2013
	Common Stock	$	0.38	$	0.38	$	0.75			$	0.75
	Senior Common Stock		0.26		0.26		0.53				0.53
	Series A Preferred Stock		0.4843749		0.4843749		0.9687498				0.9687498
	Series B Preferred Stock		0.4688		0.4688		0.9375				0.9375
	Series C Preferred Stock		0.4453		0.4453		0.8906				0.8906
	Recent Activity
	On June 6, 2014, we completed a public offering of 1,610,000 shares of our common stock at a public offering price of $17.00 per share. Gross proceeds of the offering totaled $27.4 million and net proceeds, after deducting offering expenses borne by us, were $26.0 million, which we used to acquire real estate.
	Ongoing Activity
	We have an open market sale agreement, or the ATM Program, with Jefferies LLC, or Jefferies, under which we may, from time to time, offer to sell shares of our common stock with an aggregate sales price of up to $25.0 million on the open market through Jefferies, as agent, or to Jefferies, as principal. During the six months ended June 30, 2014, we raised approximately $7.6 million in net proceeds under the ATM Program. As of June 30, 2014, under the existing program, we have sold a total of 1.2 million shares with aggregate gross proceeds of $21.8 million, and have a remaining capacity to sell up to $3.2 million of common stock under the ATM Program with Jefferies.
	In March 2011, we commenced an offering of an aggregate of 3,500,000 shares of our senior common stock, par value $0.001 per share, at a price to the public of $15.00 per share, of which 3,000,000 shares are intended to be offered pursuant to the primary offering and 500,000 shares are intended to be offered pursuant to our senior common distribution reinvestment plan, or the DRIP. We, however, reserve the right to reallocate the number of shares being offered between the primary offering and the DRIP. As of June 30, 2014, we had sold 369,553 shares of senior common stock in this ongoing offering, for gross proceeds of $5.5 million, and issued an additional 15,008 shares of senior common stock under the DRIP program, and have a remaining capacity to sell up to $47.0 million of senior common stock.
	Note to Employee
	The following table is a summary of the outstanding note receivable from an employee of the Adviser for the exercise of stock options (dollars in thousands):
	Date Issued	Outstanding Balance		Outstanding Balance		Maturity Date		Interest Rate
		of Employee Loan at		of Employee Loan at		of Note		on Note
		June 30, 2014		December 31, 2013
	Nov-06	$	375	$	375	Nov 2015			8.15	%
	In accordance with ASC 505-10-45-2, “Equity,” receivables from employees for the issuance of capital stock to employees prior to the receipt of cash payment should be reflected in the balance sheet as a reduction to stockholders’ equity. Therefore, this note was recorded as a full recourse loan to the employee and is included in the equity section of the accompanying condensed consolidated balance sheets. As of June 30, 2014, this loan maintained its full recourse status.

Subsequent_Events

Subsequent Events	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	10. Subsequent Events
	On July 1, 2014, we acquired a 124,800 square foot building located in Aurora, Colorado for $8.3 million, excluding related acquisition expenses of $0.08 million. We funded this acquisition with existing cash on hand. The tenant has leased the property for 15 years and has 2 options to renew the lease for an additional 5 years each. The lease provides for prescribed rent escalations over the life of the lease, with annualized straight line rents of $0.8 million. The accounting for this transaction has not been completed. As a result, the required ASC 805 disclosures have not been made.
	On July 7, 2014, we extended the lease with one of the tenants occupying our property located in Akron, Ohio. The new lease covers approximately two-thirds of the space and was extended for an additional five years, through March 2020. The lease was originally set to expire in March 2015. This tenant will continue to pay its existing rent through March 2015. The new lease provides for prescribed rent escalations over the life of the lease, with annualized straight line rents of $0.6 million. The lease grants the tenant two options to extend the lease for an additional five years each. In connection with the extension of the lease and the modification of certain terms under the lease, we paid $0.1 million in leasing commissions, and $0.9 million in tenant improvements.
	On July 15, 2014, our Board of Directors declared the following monthly distributions:
	Record Date	Payment Date	Common Stock		Series A Preferred		Series B Preferred		Series C Preferred
			Distributions per Share		Distributions per Share		Distributions per Share		Distributions per Share
	25-Jul-14	August 5, 2014	$	0.125	$	0.1614583	$	0.15625	$	0.1484375
	20-Aug-14	August 29, 2014		0.125		0.1614583		0.15625		0.1484375
	19-Sep-14	September 30, 2014		0.125		0.1614583		0.15625		0.1484375
	Total		$	0.375	$	0.4843749	$	0.46875	$	0.4453125
	Senior Common Stock Distributions
	Payable to the Holders of Record During the Month of:	Payment Date	Distribution per Share
	July	August 7, 2014	$	0.0875
	August	September 8, 2014		0.0875
	September	7-Oct-14		0.0875
	Total		$	0.2625
	On July 25, 2014, we closed a $5.6 million second mortgage development loan for the construction of an 81,371 square foot, build-to-suit transitional care facility located on a major hospital campus in Phoenix, Arizona. Construction is scheduled to be completed in approximately twelve months and we will earn 9.0% interest, paid currently in cash, on the loan during construction and through maturity. Prior to completion of the facility, we will be granted a right of first offer to purchase the property. If we do not purchase the property we will receive an exit fee when the property is sold and the loan is repaid in an amount sufficient for us to earn an internal rate of return of 22% on the second mortgage development loan. The loan is scheduled to mature in July 2016, but has a one year extension option.

Organization_Basis_of_Presenta1

Organization, Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Subsidiaries	'
	Subsidiaries
	We conduct substantially all of our operations through a subsidiary, Gladstone Commercial Limited Partnership, a Delaware limited partnership, or the Operating Partnership. As we currently own all of the general and limited partnership interests of the Operating Partnership through two of our subsidiaries, GCLP Business Trust I and II, the financial position and results of operations of the Operating Partnership are consolidated with those of the Company.
	Gladstone Commercial Lending, LLC, a Delaware limited liability company, or Gladstone Commercial Lending, a subsidiary of ours, was created to conduct all operations related to real estate mortgage loans of the Company. As the Operating Partnership currently owns all of the membership interests of Gladstone Commercial Lending, the financial position and results of operations of Gladstone Commercial Lending are consolidated with ours.
	Gladstone Commercial Advisers, Inc., a Delaware corporation, or Commercial Advisers, and a wholly-owned subsidiary of ours, is a taxable REIT subsidiary, or TRS, which was created to collect any non-qualifying income related to our real estate portfolio. There has been no such income earned to date. Since we own 100% of the voting securities of Commercial Advisers, the financial position and results of operations of Commercial Advisers are consolidated with ours.
	GCLP Business Trust I and GCLP Business Trust II, each a subsidiary and business trust of ours, were formed under the laws of the Commonwealth of Massachusetts on December 28, 2005. We transferred our 99% limited partnership interest in the Operating Partnership to GCLP Business Trust I in exchange for 100 shares of the trust. Gladstone Commercial Partners, LLC transferred its 1% general partnership interest in the Operating Partnership to GCLP Business Trust II in exchange for 100 trust shares.
	All further references herein to “we,” “our,” “us” and the “Company” mean Gladstone Commercial Corporation and its consolidated subsidiaries, except where it is made clear that the term means only Gladstone Commercial Corporation.
Interim Financial Information	'
	Interim Financial Information
	Our interim financial statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and pursuant to the requirements for reporting on Form 10-Q and in accordance with Article 10 of Regulation S-X. Accordingly, certain disclosures accompanying annual financial statements prepared in accordance with GAAP are omitted. The year-end balance sheet data presented herein was derived from audited financial statements, but does not include all disclosures required by GAAP. In the opinion of our management, all adjustments, consisting solely of normal recurring accruals, necessary for the fair presentation of financial statements for the interim period have been included. The interim financial statements and notes thereto should be read in conjunction with the financial statements and notes thereto included in our Form 10-K for the year ended December 31, 2013, as filed with the U.S. Securities and Exchange Commission on February 18, 2014. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for other interim periods or for the full fiscal year.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could materially differ from those estimates.
Real Estate and Lease Intangibles	'
	Real Estate and Lease Intangibles
	We record investments in real estate at cost and capitalize improvements and replacements when they extend the useful life or improve the efficiency of the asset. We expense costs of repairs and maintenance as such costs are incurred. We compute depreciation using the straight-line method over the estimated useful life, or 39 years, for buildings and improvements, 5 to 20 years for equipment and fixtures, and the shorter of the useful life or the remaining lease term for tenant improvements and leasehold interests.
	Certain of our acquisitions involve sale-leaseback transactions with newly-originated leases, which we account for as asset acquisitions under Accounting Standards Codification, or ASC, 805, “Business Combinations.” In the case of an asset acquisition, we will capitalize the transaction costs incurred in connection with the acquisition. Other of our acquisitions involve the acquisition of properties that are already being operated as rental properties, which we will generally consider to be a business combination under ASC 805. Business combination guidance is generally applicable to us when properties are acquired with leases in place at the time of acquisition. When an acquisition is considered a business combination, ASC 805 requires that the purchase price of real estate be allocated to the acquired tangible assets and liabilities, consisting of land, building, tenant improvements, long-term debt assumed and identified intangible assets and liabilities, typically the value of above-market and below-market leases, the value of in-place leases, the value of unamortized lease origination costs and the value of tenant relationships, based in each case on their fair values. ASC 805 also requires that all expenses related to an acquisition accounted for as a business combination to be expensed as incurred, rather than capitalized into the cost of the acquisition.
	Management’s estimates of fair value are made using methods similar to those used by independent appraisers (e.g. discounted cash flow analysis). Factors considered by management in its analysis include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions and costs to execute similar leases. We also consider information obtained about each property as a result of our pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets acquired and liabilities assumed. In estimating carrying costs, management also includes lost reimbursement of real estate taxes, insurance and other operating expenses as well as estimates of lost rentals at market rates during the hypothetical expected lease-up periods, which primarily range from 9 to 18 months, depending on specific local market conditions. Management also estimates costs to execute similar leases, including leasing commissions, legal and other related expenses to the extent that such costs are not already incurred in connection with a new lease origination as part of the transaction.
	We allocate purchase price to the fair value of the tangible assets of an acquired property by valuing the property as if it were vacant. The “as-if-vacant” value is allocated to land, building and tenant improvements based on management’s determination of the relative fair values of these assets. Real estate depreciation expense on these tangible assets was $4.6 million and $9.0 million for the three and six months ended June 30, 2014, respectively, and $3.6 million and $7.0 million for the three and six months ended June 30, 2013, respectively.
	Above-market and below-market in-place lease fair values for owned properties are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. When determining the non-cancelable term of the lease, we evaluate if fixed-rate renewal options, if any, should be included. The capitalized above-market lease values, included in the accompanying condensed consolidated balance sheets as part of deferred rent receivable, are amortized as a reduction of rental income over the remaining non-cancelable terms of the respective leases. Total amortization related to above-market lease values was $0.1 million for both the three and six months ended June 30, 2014 and 2013, respectively. The capitalized below-market lease values, included in the accompanying condensed consolidated balance sheets as part of deferred rent liability, are amortized as an increase to rental income over the remaining non-cancelable terms of the respective leases, including any below market renewal periods. Total amortization related to below-market lease values was $0.2 million and $0.3 million for the three and six months ended June 30, 2014, respectively, and $0.1 million and $0.3 million for the three and six months ended June 30, 2013, respectively.
	The total amount of the remaining intangible assets acquired, which consists of in-place lease values, unamortized lease origination costs, and customer relationship intangible values, are allocated based on management’s evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant. Characteristics to be considered by management in determining these values include the nature and extent of our existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and our expectations of lease renewals (including those existing under the terms of the lease agreement), among other factors.
	The value of in-place leases and lease origination costs are amortized to expense over the remaining term of the respective leases, which generally range from 10 to 15 years. The value of customer relationship intangibles, which is the benefit to us resulting from the likelihood of an existing tenant renewing its lease, are amortized to expense over the remaining term and any anticipated renewal periods in the respective leases, but in no event does the amortization period for intangible assets exceed the remaining depreciable life of the building. Should a tenant terminate its lease, the unamortized portion of the above-market and below-market lease values would be charged to rental income and the unamortized portion of in-place lease values, lease origination costs and customer relationship intangibles will be immediately charged to amortization expense. Total amortization expense related to these intangible assets and liabilities was $2.3 million and $4.7 million for the three and six months ended June 30, 2014, respectively, and $1.6 million and $3.1 million for the three and six months ended June 30, 2013, respectively.
Business Combinations	'
	Certain of our acquisitions involve sale-leaseback transactions with newly-originated leases, which we account for as asset acquisitions under Accounting Standards Codification, or ASC, 805, “Business Combinations.” In the case of an asset acquisition, we will capitalize the transaction costs incurred in connection with the acquisition. Other of our acquisitions involve the acquisition of properties that are already being operated as rental properties, which we will generally consider to be a business combination under ASC 805. Business combination guidance is generally applicable to us when properties are acquired with leases in place at the time of acquisition. When an acquisition is considered a business combination, ASC 805 requires that the purchase price of real estate be allocated to the acquired tangible assets and liabilities, consisting of land, building, tenant improvements, long-term debt assumed and identified intangible assets and liabilities, typically the value of above-market and below-market leases, the value of in-place leases, the value of unamortized lease origination costs and the value of tenant relationships, based in each case on their fair values. ASC 805 also requires that all expenses related to an acquisition accounted for as a business combination to be expensed as incurred, rather than capitalized into the cost of the acquisition.
Impairment Charges	'
	Impairment Charges
	We account for the impairment of real estate, including intangible assets, in accordance with ASC 360-10-35, “Property, Plant, and Equipment,” which requires us to periodically review the carrying value of each property to determine if circumstances indicate impairment of the carrying value of the investment exists or that depreciation periods should be modified. If circumstances indicate the possibility of impairment, we prepare a projection of the undiscounted future cash flows, without interest charges, of the specific property and determine if the carrying value of the investment in such property is recoverable. In performing the analysis, we consider such factors as each tenant’s payment history and financial condition, the likelihood of lease renewal, business conditions in the industry in which the tenants operate, whether there are indications that the fair value of the real estate has decreased and our intended holding period of the property. If the carrying amount is more than the aggregate undiscounted future cash flows, we would recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value, less cost to sell, of the property. We evaluate our entire portfolio of properties each quarter for any impairment indicators and perform an impairment analysis on those select properties that have an indication of impairment.
Deferred Financing Costs	'
	Deferred Financing Costs
	Deferred financing costs consist of costs incurred to obtain financing, including legal fees, origination fees and administrative fees. The costs are deferred and amortized using the straight-line method, which approximates the effective interest method, over the term of the secured financing. We made payments of $0.3 million and $0.6 million for deferred financing costs during the three and six months ended June 30, 2014, respectively, and payments of $0.1 million and $0.2 million during the three and six months ended June 30, 2013, respectively. Total amortization expense related to deferred financing costs is included in interest expense and was $0.4 million and $0.8 million for both the three and six months ended June 30, 2014 and 2013, respectively.
Revenue Recognition	'
	Revenue Recognition
	Rental revenue includes rents that each tenant pays in accordance with the terms of its respective lease reported evenly over the non-cancelable term of the lease. Most of our leases contain rental increases at specified intervals. We recognize such revenues on a straight-line basis. Deferred rent receivable in the accompanying condensed consolidated balance sheet includes the cumulative difference between rental revenue, as recorded on a straight-line basis, and rents received from the tenants in accordance with the lease terms, along with the capitalized above-market in-place lease values of certain acquired properties. Accordingly, we determine, in our judgment, to what extent the deferred rent receivable applicable to each specific tenant is collectable. We review deferred rent receivable, as it relates to straight line rents, on a quarterly basis and take into consideration the tenant’s payment history, the financial condition of the tenant, business conditions in the industry in which the tenant operates and economic conditions in the geographic area in which the property is located. In the event that the collectability of deferred rent with respect to any given tenant is in doubt, we record an allowance for uncollectable accounts or record a direct write-off of the specific rent receivable. No such reserves or direct write-offs have been recorded to date.
	Tenant recovery revenue includes payments from tenants as reimbursements for franchise taxes, management fees, insurance, and ground lease payments. We recognize tenant recovery revenue in the same periods that we incur the related expenses.
Asset Retirement Obligations	'
	Asset Retirement Obligations
	ASC 410, “Asset Retirement and Environmental Obligation,” requires an entity to recognize a liability for a conditional asset retirement obligation when incurred if the liability can be reasonably estimated. ASC 410-20-20 clarifies that the term “Conditional Asset Retirement Obligation” refers to a legal obligation (pursuant to existing laws or by contract) to perform an asset retirement activity in which the timing and/or method of settlement are conditional on a future event that may or may not be within the control of the entity. ASC 410-20-25-6 clarifies when an entity would have sufficient information to reasonably estimate the fair value of an asset retirement obligation. We have accrued a liability and corresponding increase to the cost of the related properties for disposal related to all properties constructed prior to 1985 that have, or may have, asbestos present in the building. The liabilities are accreted over the life of the leases for the respective properties. There were no liabilities accrued during the six months ended June 30, 2014 and 2013, respectively. We recorded expenses of $0.04 million and $0.07 million during the three and six months ended June 30, 2014, respectively, and $0.03 million and $0.06 million during the three and six months ended June 30, 2013, respectively, to general and administrative expense. Costs of future expenditures for obligations are discounted to their present value. The aggregate undiscounted obligation on all properties is $9.2 million and the discount rates used in the calculations range from 2.5% to 7.6%. We do not expect to make any payments in conjunction with these obligations in each of the next five years.
Comprehensive Loss	'
	Comprehensive Loss
	For the three and six months ended June 30, 2014 and 2013, comprehensive loss equaled net loss; therefore, a separate statement of comprehensive loss is not included in the accompanying condensed consolidated financial statements.
Recently Issued Accounting Guidance	'
	Recently Issued Accounting Guidance
	The Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” Under this revised guidance, only disposals representing a strategic shift in operations, such as a disposal of a major geographic area, a major line of business or a major equity method investment, will be presented as discontinued operations. This standard is effective for our fiscal year beginning January 1, 2015; however, the FASB has permitted early adoption beginning with the first quarter of 2014. We adopted this standard as of March 31, 2014. We anticipate the adoption will result in most disposals not qualifying for discontinued operations presentation.
	In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards, “Revenue from Contracts with Customers (ASC 606).” The revenue standard contains principles that an entity will apply to determine the measurement of revenue and timing of when it is recognized. This standard is effective for our fiscal year beginning January 1, 2017 and we are currently evaluating any impact from adoption.
Fair Value Measurements and Disclosures	'
	In November 2013, we entered into an interest rate cap agreement with Wells Fargo that caps the interest rate on the note payable for our Champaign, Illinois property. The agreement provides that the interest rate on the note payable for this property is capped at a certain interest rate when one-month LIBOR is in excess of 3.0%. The fair value of the interest rate cap agreement is recorded in other assets on our accompanying condensed consolidated balance sheets. We record changes in the fair value of the interest rate cap agreement quarterly based on the current market valuations at quarter end as other income (loss) on our accompanying condensed consolidated statements of operations. Generally, we will estimate the fair value of our interest rate cap using estimates of value provided by the counterparty and our own assumptions in the absence of observable market data, including estimated remaining life, counterparty credit risk, current market yield and interest rate spreads of similar securities as of the measurement date. At June 30, 2014, our interest rate cap agreement was valued using Level 3 inputs of the hierarchy established by ASC 820, “Fair Value Measurements and Disclosures.” The following table summarizes the key terms of each interest rate cap agreement (dollars in thousands):
Distinguishing Liabilities from Equity	'
	The Term Preferred Stock is recorded as liability in accordance with ASC 480, “Distinguishing Liabilities from Equity,” which states that mandatorily redeemable financial instruments should be classified as liabilities and therefore the related dividend payments are treated as a component of interest expense in the condensed consolidated statements of operations.
Equity	'
	In accordance with ASC 505-10-45-2, “Equity,” receivables from employees for the issuance of capital stock to employees prior to the receipt of cash payment should be reflected in the balance sheet as a reduction to stockholders’ equity. Therefore, this note was recorded as a full recourse loan to the employee and is included in the equity section of the accompanying condensed consolidated balance sheets. As of June 30, 2014, this loan maintained its full recourse status.

Earnings_Loss_Per_Share_of_Com1

Earnings (Loss) Per Share of Common Stock (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Basic and Diluted Earnings (Loss) Per Share of Common Stock	'
	The following tables set forth the computation of basic and diluted earnings (loss) per share of common stock for the three and six months ended June 30, 2014 and 2013, respectively. We computed basic earnings (loss) per share for the three and six months ended June 30, 2014 and 2013, respectively, using the weighted average number of shares outstanding during the periods. Diluted earnings (loss) per share for the three and six months ended June 30, 2014 and 2013, reflects additional shares of common stock, related to our convertible senior common stock, that would have been outstanding if dilutive potential shares of common stock had been issued, as well as an adjustment to net income available to common stockholders as applicable to common stockholders that would result from their assumed issuance(dollars in thousands, except per share amounts).
			For the three months ended June 30,					For the six months ended June 30,
			2014		2013			2014			2013
	Calculation of basic earnings (loss) per share of common stock:
	Net earnings (loss) available (attributable) to common stockholders		$	86	$	(641	)	$	(14,554	)	$	(1,286	)
	Denominator for basic weighted average shares of common stock			16,547,793		12,380,402			16,149,467			11,808,701
	Basic earnings (loss) per share of common stock		$	0.01	$	(0.05	)	$	(0.90	)	$	(0.11	)
	Calculation of diluted earnings (loss) per share of common stock:
	Net income (loss) available (attributable) to common stockholders		$	86	$	(641	)	$	(14,554	)	$	(1,286	)
	Add: Income impact of assumed conversion of senior common stock (1)			110		—			—			—
	Net income (loss) available (attributable) to common stockholders plus assumed conversions		$	196	$	(641	)	$	(14,554	)	$	(1,286	)
	Denominator for basic weighted average shares of common stock			16,547,793		12,380,402			16,149,467			11,808,701
	Effect of convertible senior common stock (1)			347,180		—			—			—
	Denominator for diluted weighted average shares of common stock			16,894,973		12,380,402			16,149,467			11,808,701
	Diluted earnings (loss) per share of common stock		$	0.01	$	(0.05	)	$	(0.90	)	$	(0.11	)
	(1)	We excluded convertible senior common shares of 332,608 from the calculation of diluted earnings per share for the six months ended June 30, 2014 because it was anti-dilutive. We also excluded 195,759, and 180,753, from the calculation of diluted earnings per share for the three and six months ended June 30, 2013, respectively, because it was anti-dilutive.

Real_Estate_and_Intangible_Ass1

Real Estate and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Property Plant And Equipment [Abstract]	'
Company's Investments in Real Estate	'
	The following table sets forth the components of our investments in real estate as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			June 30, 2014			December 31, 2013
	Real estate:
	Land		$	83,352		$	79,153
	Building and improvements			561,138			527,230
	Tenant improvements			39,511			35,970
	Accumulated depreciation			(88,520	)		(81,241	)
	Real estate, net		$	595,481		$	561,112
Summary of Properties Acquired	'
	2014 Real Estate Activity
	During the six months ended June 30, 2014, we acquired six properties, which are summarized in the table below (dollars in thousands):
	Location		Acquisition Date			Square Footage			Lease Term		Renewal Options	Total Purchase			Acquisition		Annualized Straight		Debt Issued &
												Price			Expenses		Line Rent		Assumed
	Allen, TX			3/27/14			21,154		12 Years		4 (5 years each)	$	5,525		$	29	$	570	$	3,481
	Colleyville, TX			3/27/14			20,355		12 Years		4 (5 years each)		4,523			29		467		2,849
	Rancho Cordova, CA			4/22/14			61,358		10 Years		1 (5 year)		8,225			65		902		4,935
	Coppell, TX			5/8/14			21,171		12 Years		4 (5 years each)		5,838			22		601		3,816
	Columbus, OH			5/13/14			114,786		9.5 Years		N/A		11,800			65		1,278		N/A
	Taylor, PA			6/9/14			955,935		10 Years		4 (5 years each)		39,000			714		3,400		22,600
	Total						1,194,759					$	74,911		$	924	$	7,218	$	37,681
	2013 Real Estate Activity
	During the six months ended June 30, 2013, we acquired three properties and completed an expansion of one property, which are summarized below (dollars in thousands):
	Location		Acquisition/			Square Footage			Lease		Renewal Options	Total Purchase/			Acquistion		Annualized Straight		Debt
			Expansion Date						Term			Expansion Price			Expenses		Line Rent		Issued
	Egg Harbor Township, NJ			3/28/13			29,257		10 years		1 (5 years)	$	5,650		$	152	$	490	$	3,700
	Clintonville, WI (1)			4/11/13			102,400		15 years		N/A		3,250			N/A		961		—
	Vance, AL			5/8/13			170,000		10 years		2 (5 year options)		13,388			186		1,173		—
	Blaine, MN			5/10/13			92,275		6.9 years		2 (5 year options)		14,450			79		1,475		—
	Total						393,932					$	36,738		$	417	$	4,099	$	3,700
	(1)	The Clintonville, WI property was originally acquired in November 2005 for $5.3 million. After the expansion completed in April 2013, the total investment in the property is $8.6 million.
Fair Value of Acquired Assets and Assumed Liabilities	'
	In accordance with ASC 805, we determined the fair value of the acquired assets related to the six properties acquired during the six months ended June 30, 2014 as follows (in thousands):
			Land			Building			Tenant			In-place			Leasing		Customer		Above Market		Below Market			Premium on			Total Purchase
									Improvements			Leases			Costs		Relationships		Leases		Leases			Assumed Debt			Price
	Allen, TX		$	874		$	3,509		$	125		$	598		$	273	$	218	$	—	$	—		$	(72	)	$	5,525
	Colleyville, TX			1,277			2,307			117			486			220		181		—		(6	)		(59	)		4,523
	Rancho Cordova, CA			752			5,898			278			473			546		278		—		—			—			8,225
	Coppell, TX			1,448			3,221			128			636			293		230		—		—			(118	)		5,838
	Columbus, OH			990			6,080			1,937			823			719		990		261		—			—			11,800
	Taylor, PA			3,102			24,449			956			6,171			1,452		2,870		—		—			—			39,000
			$	8,443		$	45,464		$	3,541		$	9,187		$	3,503	$	4,767	$	261	$	(6	)	$	(249	)	$	74,911
	In accordance with ASC 805, we determined the fair value of acquired assets related to the three properties acquired during the six months ended June 30, 2013 as follows (in thousands):
			Land			Building			Tenant			In-place			Leasing Costs		Customer		Total Purchase
									Improvements			Leases					Relationships		Price
	Egg Harbor Township, NJ		$	1,627		$	2,735		$	282		$	558		$	189	$	259	$	5,650
	Vance, AL			457			9,721			808			1,097			678		627		13,388
	Blaine, MN			1,060			9,347			1,172			1,361			694		816		14,450
			$	3,144		$	21,803		$	2,262		$	3,016		$	1,561	$	1,702	$	33,488
Schedule of Revenue and Earnings Recognized on Properties Acquired	'
	Below is a summary of the total revenue and earnings recognized on the six properties acquired during the three and six months ended June 30, 2014 (dollars in thousands):
						For the three months ended June 30,						For the six months ended June 30,
						2014						2014
	Location		Acquisition			Rental Revenue			Earnings (1)			Rental Revenue			Earnings (1)
			Date
	Allen, TX			3/27/14		$	142		$	81		$	150		$	86
	Colleyville, TX			3/27/14			117			67			123			71
	Rancho Cordova, CA			4/22/14			173			65			173			65
	Coppell, TX			5/8/14			89			52			89			52
	Columbus, OH			5/13/14			167			68			167			68
	Taylor, PA			6/9/14			208			98			208			98
						$	896		$	431		$	910		$	440
	-1	Earnings is calculated as net income exclusive of both interest expense and acquisition related costs that are required to be expensed under ASC 805.
	Below is a summary of the total revenue and earnings recognized on the three properties acquired during the six months ended June 30, 2013 (dollars in thousands):
	Location		Acquisition			For the three months ended June 30, 2013						For the six months ended June 30, 2013
			Date			Rental Revenue			Earnings (1)			Rental Revenue			Earnings (1)
	Egg Harbor Township, NJ			3/28/13		$	122		$	69		$	128		$	72
	Vance, AL			5/8/13			170			70			170			70
	Blaine, MN			5/10/13			210			94			210			94
						$	502		$	233		$	508		$	236
	(1)	Earnings is calculated as net income less interest expense and acquisition related costs that are required to be expensed under ASC 805.
Pro-Forma Condensed Consolidated Statements of Operations	'
	The following table reflects pro-forma consolidated statements of operations as if the six properties acquired during the three and six months ended June 30, 2014 were acquired as of the beginning of the previous period. The pro-forma earnings for the three and six months ended June 30, 2014 and 2013 were adjusted to assume that acquisition-related costs were incurred as of the beginning of the previous period (dollars in thousands, except per share amounts):
			For the three months ended June 30,						For the six months ended June 30,
			2014			2013			2014			2013
			(unaudited)						(unaudited)
	Operating Data:
	Total operating revenue		$	19,339		$	18,822		$	38,316		$	37,628
	Total operating expenses			(10,986	)		(11,090	)		(35,799	)(1)		(21,608	)
	Other expenses			(6,202	)		(7,566	)		(13,655	)		(15,355	)
	Net income (loss)			2,151			166			(11,138	)		665
	Dividends attributable to preferred and senior common stock			(1,133	)		(1,092	)		(2,257	)		(2,169	)
	Net income (loss) available (attributable) to common stockholders		$	1,018		$	(926	)	$	(13,395	)	$	(1,504	)
	Share and Per Share Data:
	Basic and diluted earnings (loss) per share of common stock		$	0.06		$	(0.07	)	$	(0.83	)	$	(0.13	)
	Weighted average shares outstanding-basic			16,547,793			12,380,402			16,149,467			11,808,701
	Weighted average shares outstanding-diluted			16,894,973			12,380,402			16,149,467			11,808,701
	-1	$14.0 million relates to the impairment charge recorded in operating expenses during the three months ended March 31, 2014.
Future Operating Lease Payments from Tenants under Non-Cancelable Leases	'
	Future operating lease payments from tenants under non-cancelable leases, excluding tenant reimbursement of expenses, for the remainder of 2014 and each of the five succeeding fiscal years and thereafter is as follows (dollars in thousands):
	Year		Tenant
			Lease Payments
	Six Months ending December 31, 2014		$	34,255
	2015			65,830
	2016			63,228
	2017			62,763
	2018			61,125
	2019			61,469
	Thereafter			274,216
Carrying Value of Intangible Assets and Accumulated Amortization	'
	The following table summarizes the carrying value of intangible assets and the accumulated amortization for each intangible asset class (dollars in thousands):
			June 30, 2014						December 31, 2013
			Lease			Accumulated			Lease			Accumulated
			Intangibles			Amortization			Intangibles			Amortization
	In-place leases		$	56,521		$	(17,205	)	$	47,442		$	(15,158	)
	Leasing costs			35,251			(10,680	)		31,339			(9,323	)
	Customer relationships			39,896			(11,654	)		35,739			(10,407	)
			$	131,668		$	(39,539	)	$	114,520		$	(34,888	)
Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed	'
	The weighted average amortization periods in years for the intangible assets acquired and liabilities assumed during the six months ended June 30, 2014 and 2013, respectively, were as follows
	Intangible Assets & Liabilities		2014			2013
	In-place leases			10.7			9.3
	Leasing costs			10.7			9.3
	Customer relationships			15.6			14.2
	Above market leases			8.2			—
	Below market leases			11.9			—
	All intangible assets & liabilities			12.2			10.9
Estimated Aggregate Amortization Expense	'
	The estimated aggregate amortization expense for the remainder of 2014 and for each of the five succeeding fiscal years and thereafter is as follows (dollars in thousands):
	Year		Estimated
			Amortization Expense
	Six Months ending December 31, 2014		$	5,834
	2015			11,395
	2016			10,732
	2017			10,539
	2018			10,251
	2019			10,243
	Thereafter			33,135

Real_Estate_Held_for_Sale_and_1

Real Estate Held for Sale and Impairment Charges (Tables)	6 Months Ended
	Jun. 30, 2014
Real Estate [Abstract]	'
Components of Income from Real Estate and Related Assets Held for Sale	'
	The table below summarizes the components of income from real estate and related assets held for sale for the three and six months ended June 30, 2014 and June 30, 2013, respectively:
		For the three months ended June 30,				For the six months ended June 30,
		2014		2013		2014		2013
	Operating revenue	$	215	$	292	$	507	$	583
	Operating expense		1		57		40		114
	Income from real estate and related assets held for sale	$	214	$	235	$	467	$	469

Mortgage_Notes_Payable_and_Lin1

Mortgage Notes Payable and Line of Credit (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Company's Mortgage Notes Payable and Line of Credit	'
	Our mortgage notes payable and line of credit as of June 30, 2014 and December 31, 2013 are summarized below (dollars in thousands):
							Carrying Value at
			Encumbered				June 30, 2014				December 31, 2013			Stated Interest		Scheduled Maturity
			properties at											Rates at June 30,		Dates at June 30,
			June 30, 2014											2014 (4)		2014
	Mortgage and Other Secured Loans:
	Fixed rate mortgage loans			71			$	447,178			$	413,678		-1		-2
	Variable rate mortgage loans			4				8,200				8,200		LIBOR+2.15% (3)		12/1/16
	Premiums and discounts (net)			N/A				859				724		N/A		N/A
	Total Mortgage Notes Payable			75			$	456,237			$	422,602
	Variable rate Line of Credit			16				25,650				24,400		LIBOR+3.00% (3)		8/1/17
	Total Mortgage Notes Payable and Line of Credit			91			$	481,887			$	447,002
	-1	Interest rates on our fixed rate mortgage notes payable vary from 4.04% to 6.80%.
	-2	We have 40 mortgage notes payable with maturity dates ranging from 9/1/2015 through 1/06/2039.
	-3	At June 30, 2014, one month LIBOR was approximately 0.1552%.
	-4	The weighted average interest rate on all debt outstanding at June 30, 2014, was approximately 5.25%.
	N/A - Not Applicable
Summary of Long-Term Mortgages	'
	During the six months ended June 30, 2014, we assumed two long-term mortgages, collateralized by three properties, and issued two long-term mortgages, collateralized by two properties, which are summarized below (dollars in thousands):
	Date of Issuance		Issuing Bank		Debt Issued				Interest Rate				Maturity Date
	3/27/14		Wells Fargo N.A.		$	6,330				5.58	%		2/1/16
	4/22/14		Keybank N.A.			4,935				4.9	%		5/1/24
	5/8/14		Wells Fargo N.A.			3,816				6.25	%		6/1/16
	6/9/14		Prudential Mortgage Capital Company			22,600				4.23	%		7/1/19
					$	37,681
Principal Payments of Mortgage Notes Payable	'
	Scheduled principal payments of mortgage notes payable for the remainder of 2014, and each of the five succeeding fiscal years and thereafter are as follows (dollars in thousands):
	Year		Scheduled Principal
			Payments
	Six Months ending December 31, 2014		$	20,798
	2015			42,683
	2016			98,702
	2017			67,201
	2018			19,789
	2019			34,449
	Thereafter			171,756
			$	455,378
Summary of Interest Rate Cap Agreement	'
	The following table summarizes the key terms of each interest rate cap agreement (dollars in thousands):
																	As of June 30,
																	2014
	Interest Rate Cap		Notional				LIBOR Cap				Effective Date			Maturity Date			Cost		Fair Value
			Amount
	November 26, 2013		$	8,200				3	%			June 30, 2014			December 1, 2016		$	31	$	7

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Future Minimum Rental Payments Due under Terms of Leases	'
	We are obligated as lessee under three ground leases. Future minimum rental payments due under the terms of these leases for the remainder of 2014 and each of the five succeeding years and thereafter, are as follows (dollars in thousands):
						For the year ended December 31,
	Location		Lease End Date			2014		2015		2016		2017		2018		2019		Thereafter
	Tulsa, OK			21-Apr		$	76	$	153	$	153	$	153	$	153	$	153	$	229
	Dartmouth, MA			May-36			87		174		174		174		174		174		3,300
	Springfield, MA			Feb-30			43		86		86		89		90		90		972
						$	206	$	413	$	413	$	416	$	417	$	417	$	4,501
Tenant Improvements [Member]	'
Future Tenant Improvement Payments Due on Properties	'
	The following table reflects unconditional purchase obligations which have not been recognized on the balance sheet as of June 30, 2014. In addition, we have committed to provide financing to expand our building located in Canton, North Carolina. Future tenant improvement payments due on these properties for the remainder of 2014 and each of the five succeeding years and thereafter, are as follows (dollars in thousands):
						For the year ended December 31,
	Location		Lease End Date			2014		2015		2016		2017		2018		2019		Thereafter
	Canton, NC			24-Jul	(1)	$	1,306	$	—	$	—	$	—	$	—	$	—	$	—
	Concord Township, OH			Aug-34			150		—		—		—		—		—		—
	Egg Harbor Township, NJ			23-Apr			229		—		—		—		—		—		—
						$	1,685	$	—	$	—	$	—	$	—	$	—	$	—
	(1)	Upon completion of expansion of this property, currently projected to be September of 2014, the lease will be extended for 20 years, through September 2034.

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Summary of Changes in Stockholders' Equity	'
	The following table summarizes the changes in our stockholders’ equity for the six months ended June 30, 2014 (dollars in thousands):
		Preferred		Senior Common		Common				Additional		Notes			Distributions in			Total
		Stock		Stock		Stock				Paid in		Receivable			Excess of			Stockholders’
										Capital		from Employees			Accumulated			Equity
															Earnings
	Balance at December 31, 2013	$	2	$	—	$	16			$	298,751	$	(375	)	$	(115,248	)	$	183,146
	Issuance of senior common stock and common stock, net		—		—		2				34,099		—			—			34,101
	Distributions declared to common, senior common and preferred stockholders		—		—		—				—		—			(14,400	)		(14,400	)
	Net loss		—		—		—				—		—			(12,297	)		(12,297	)
	Balance at June 30, 2014	$	2	$	—	$	18			$	332,850	$	(375	)	$	(141,945	)	$	190,550
Dividends Declared	'
	Our Board of Directors declared the following distributions per share for the three and six months ended June 30, 2014 and 2013:
		For the three months ended June 30,				For the six months ended June 30,
		2014		2013		2014				2013
	Common Stock	$	0.38	$	0.38	$	0.75			$	0.75
	Senior Common Stock		0.26		0.26		0.53				0.53
	Series A Preferred Stock		0.4843749		0.4843749		0.9687498				0.9687498
	Series B Preferred Stock		0.4688		0.4688		0.9375				0.9375
	Series C Preferred Stock		0.4453		0.4453		0.8906				0.8906
Summary of Outstanding Note Receivable from an Employee for the Exercise of Stock Options	'
	The following table is a summary of the outstanding note receivable from an employee of the Adviser for the exercise of stock options (dollars in thousands):
	Date Issued	Outstanding Balance		Outstanding Balance		Maturity Date		Interest Rate
		of Employee Loan at		of Employee Loan at		of Note		on Note
		June 30, 2014		December 31, 2013
	Nov-06	$	375	$	375	Nov 2015			8.15	%

Subsequent_Events_Tables

Subsequent Events (Tables)	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Monthly Distributions Declared by Company's Board of Directors	'
	On July 15, 2014, our Board of Directors declared the following monthly distributions:
	Record Date	Payment Date	Common Stock		Series A Preferred		Series B Preferred		Series C Preferred
			Distributions per Share		Distributions per Share		Distributions per Share		Distributions per Share
	25-Jul-14	August 5, 2014	$	0.125	$	0.1614583	$	0.15625	$	0.1484375
	20-Aug-14	August 29, 2014		0.125		0.1614583		0.15625		0.1484375
	19-Sep-14	September 30, 2014		0.125		0.1614583		0.15625		0.1484375
	Total		$	0.375	$	0.4843749	$	0.46875	$	0.4453125
	Senior Common Stock Distributions
	Payable to the Holders of Record During the Month of:	Payment Date	Distribution per Share
	July	August 7, 2014	$	0.0875
	August	September 8, 2014		0.0875
	September	7-Oct-14		0.0875
	Total		$	0.2625

Organization_Basis_of_Presenta2

Organization, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
			Subsidiary
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Number of subsidiaries interest owned in general and limited partnership	'	'	2	'
Non-qualifying income related to real estate portfolio	'	'	$0	'
Amortization related to below-market lease	200,000	100,000	300,000	300,000
Total amortization expense related to intangible assets	2,300,000	1,600,000	4,700,000	3,100,000
Payments of deferred financing costs	300,000	100,000	633,000	209,000
Total amortization expense related to deferred financing costs included in interest expense	400,000	400,000	795,000	817,000
Liabilities accrued	0	'	0	'
Expenses recorded to general and administrative expense	40,000	30,000	70,000	60,000
Aggregate undiscounted obligation on properties	9,200,000	'	9,200,000	'
Expected payment to be made in next twelve months	0	'	0	'
Expected payment to be made in second year	0	'	0	'
Expected payment to be made in third year	0	'	0	'
Expected payment to be made in fourth year	0	'	0	'
Expected payment to be made in fifth year	0	'	0	'
Real Estate [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Real estate depreciation expense	4,600,000	3,600,000	9,000,000	7,000,000
Minimum [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Expected lease up period for estimating carrying costs	'	'	'9 months	'
Remaining term of in-place leases and unamortized lease	'	'	'10 years	'
Percentage of discount rate for calculating undiscounted obligation	2.50%	'	'	'
Maximum [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Expected lease up period for estimating carrying costs	'	'	'18 months	'
Remaining term of in-place leases and unamortized lease	'	'	'15 years	'
Percentage of discount rate for calculating undiscounted obligation	'	'	7.60%	'
Above Market Leases [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Amortization related to above-market lease	$100,000	$100,000	$100,000	$100,000
Building and Improvements [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Estimated useful life	'	'	'39 years	'
Equipment and Fixtures [Member] | Minimum [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Estimated useful life	'	'	'5 years	'
Equipment and Fixtures [Member] | Maximum [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Estimated useful life	'	'	'20 years	'
Gladstone Commercial Advisers, Inc. [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Company ownership percentage of voting securities of Commercial Advisers	'	'	100.00%	'
GCLP Business Trust I [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Percentage of limited partnership interest transferred to business unit	'	'	99.00%	'
Number of trust shares exchanged for limited partnership interest	'	'	100	'
Subsidiary and business trust of the Company, formed under the laws of the Commonwealth of Massachusetts, date	'	'	28-Dec-05	'
GCLP Business Trust II [Member]	'	'	'	'
Organization And Significant Accounting Policies [Line Items]	'	'	'	'
Percentage of limited partnership interest transferred to business unit	'	'	1.00%	'
Number of trust shares exchanged for general partnership interest	'	'	100	'
Subsidiary and business trust of the Company, formed under the laws of the Commonwealth of Massachusetts, date	'	'	28-Dec-05	'

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Related Party Transaction [Line Items]	'		'		'		'		'
Due to Adviser and Administrator	$1,737,000	[1]	'		$1,737,000	[1]	'		$1,360,000	[1]
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock	2.00%		'		'		'		'
Base management fee	666,000	[1]	451,000	[1]	1,291,000	[1]	804,000	[1]	'
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser	'		'		1.75%		'		'
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser	'		'		7.00%		'		'
Amount to be paid to Adviser in percentage of pre-incentive fee condition one	'		'		100.00%		'		'
Pre-incentive fee in percentage of common stockholders' equity that awards adviser hundred percent of amount of pre-incentive fee, maximum percentage	'		'		2.19%		'		'
Amount to be paid to Adviser in percentage of pre-incentive fee condition two	'		'		20.00%		'		'
Pre-incentive fee in percentage of common stockholders' equity that awards the adviser 20% of the amount of the pre-incentive fee, minimum percentage	'		'		2.19%		'		'
Incentive fee	1,527,000	[1]	933,000	[1]	2,767,000	[1]	1,864,000	[1]	'
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser	957,000	[1]	917,000	[1]	2,162,000	[1]	1,502,000	[1]	'
Related-party transactions incentive fee, net	500,000		0		600,000		400,000		'
Administration fee	485,000	[1]	367,000	[1]	977,000	[1]	730,000	[1]	'
Dealer manager fee in percentage of gross proceeds of shares of senior common stock sold	'		'		7.00%		'		'
Sales commission fee in percentage of gross proceeds of shares of senior common stock sold	'		'		3.00%		'		'
Agreement termination date	'		'		31-Aug-14		'		'
Fees paid	700,000		0		700,000		0		'
Extended agreement termination date	'		'		31-Aug-15		'		'
Minimum [Member]	'		'		'		'		'
Related Party Transaction [Line Items]	'		'		'		'		'
Percentage of the amount of the mortgage	'		'		0.50%		'		'
Maximum [Member]	'		'		'		'		'
Related Party Transaction [Line Items]	'		'		'		'		'
Percentage of the amount of the mortgage	'		'		1.00%		'		'
Dealer Manager [Member]	'		'		'		'		'
Related Party Transaction [Line Items]	'		'		'		'		'
Payments made to the Dealer Manager pursuant to Dealer Manager Agreement	$50,000		$100,000		$100,000		$200,000		'
Agreement termination date	'		'		28-Mar-15		'		'
Agreement termination on senior common stock shares issued	'		'		3,000,000		'		'
[1]	Refer to Note 2 "Related-Party Transactions"

Earnings_Loss_Per_Share_of_Com2

Earnings (Loss) Per Share of Common Stock - Basic and Diluted Earnings (Loss) Per Share of Common Stock (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Calculation of basic earnings (loss) per share of common stock:	'	'	'	'
Net earnings (loss) available (attributable) to common stockholders	$86	($641)	($14,554)	($1,286)
Denominator for basic weighted average shares of common stock	16,547,793	12,380,402	16,149,467	11,808,701
Basic earnings (loss) per share of common stock	$0.01	($0.05)	($0.90)	($0.11)
Calculation of diluted earnings (loss) per share of common stock:	'	'	'	'
Net income (loss) available (attributable) to common stockholders	86	-641	-14,554	-1,286
Add: Income impact of assumed conversion of senior common stock	110	'	'	'
Net income (loss) available (attributable) to common stockholders plus assumed conversions	$196	($641)	($14,554)	($1,286)
Denominator for basic weighted average shares of common stock	16,547,793	12,380,402	16,149,467	11,808,701
Effect of convertible senior common stock	347,180	'	'	'
Denominator for diluted weighted average shares of common stock	16,894,973	12,380,402	16,149,467	11,808,701
Diluted earnings (loss) per share of common stock	$0.01	($0.05)	($0.90)	($0.11)

Earnings_Loss_Per_Share_of_Com3

Earnings (Loss) Per Share of Common Stock - Basic and Diluted Earnings (Loss) Per Share of Common Stock (Parenthetical) (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'
Anti-dilutive convertible senior common shares excluded from calculation of diluted earnings per share	195,759	332,608	180,753

Real_Estate_and_Intangible_Ass2

Real Estate and Intangible Assets - Company's Investments in Real Estate (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Real estate:	'	'
Land	$83,352	$79,153
Building and improvements	561,138	527,230
Tenant improvements	39,511	35,970
Accumulated depreciation	-88,520	-81,241
Total real estate, net	$595,481	$561,112

Real_Estate_and_Intangible_Ass3

Real Estate and Intangible Assets - Additional Information (Detail) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended		6 Months Ended
	Jun. 11, 2014	Jun. 30, 2014	Jun. 30, 2013	6-May-14	Jun. 30, 2014	Jun. 11, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
		Property		Austin, Texas [Member]	Austin, Texas [Member]	Burnsville, Minnesota [Member]	Newburyport, Massachusetts [Member]	2014 Real Estate Activity [Member]	2013 Real Estate Activity [Member]
								Property	Property
Real Estate Properties [Line Items]	'	'	'	'	'	'	'	'	'
Number of properties acquired	'	6	'	'	'	'	'	6	3
Number of properties expanded	'	'	'	'	'	'	'	'	1
Lease expiration date	'	'	'	'	'	'	30-Apr-15	'	'
Option to extend lease term	'	'	'	'8 years	'	'	'	'	'
Original lease expiration	'	'	'	'2015-06	'	'	'	'	'
Extended lease expiration	'	'	'	'2022-06	'	'	'	'	'
Amount of annualized straight line rents over the life of the lease	'	'	'	$700,000	'	'	'	'	'
Leasing commission pay	'	765,000	394,000	'	200,000	'	'	'	'
Tenant improvements payable	'	3,300,000	'	'	1,300,000	'	'	'	'
Extended additional period of lease	'3 years	'	'	'	'	'8 years	'	'	'
Extended lease expiration date	'	'	'	'	'	'2023-01	'	'	'
Lease expiration period, month and year	'	'	'	'	'	'2015-06	'	'	'
Annualized straight line rent escalations	'	'	'	'	'	$1,000,000	'	'	'
Annual increase in lease rental	14.00%	'	'	'	'	'	'	'	'

Real_Estate_and_Intangible_Ass4

Real Estate and Intangible Assets - Summary of Properties Acquired (Detail) (USD $)

6 Months Ended

1 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Nov. 30, 2005

Jun. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

sqft

sqft

Allen, TX [Member]

Colleyville, TX [Member]

Rancho Cordova, CA [Member]

Coppell, TX [Member]

Columbus, OH [Member]

Taylor, PA [Member]

Egg Harbor Township, NJ [Member]

Clintonville, WI [Member]

Clintonville, WI [Member]

Vance, AL [Member]

Blaine, MN [Member]

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

sqft

Option

Option

Option

Option

Option

Option

Option

Option

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition Date

'

'

27-Mar-14

27-Mar-14

22-Apr-14

8-May-14

13-May-14

9-Jun-14

28-Mar-13

'

11-Apr-13

8-May-13

10-May-13

Square Footage

1,194,759

393,932

21,154

20,355

61,358

21,171

114,786

955,935

29,257

'

102,400

170,000

92,275

Lease Term

'

'

'12 years

'12 years

'10 years

'12 years

'9 years 6 months

'10 years

'10 years

'

'15 years

'10 years

'6 years 10 months 24 days

Renewal Options

'

'

4

4

1

4

'

4

1

'

'

2

2

Renewal Options Period

'

'

'5 years

'5 years

'5 years

'5 years

'

'5 years

'5 years

'

'

'5 years

'5 years

Total purchase price

$74,911

$36,738

$5,525

$4,523

$8,225

$5,838

$11,800

$39,000

$5,650

$5,300

$3,250

$13,388

$14,450

Acquisition Expenses

924

417

29

29

65

22

65

714

152

'

'

186

79

Annualized Straight Line Rent

7,218

4,099

570

467

902

601

1,278

3,400

490

'

961

1,173

1,475

Debt Issued

$37,681

$3,700

$3,481

$2,849

$4,935

$3,816

'

$22,600

$3,700

'

'

'

'

Real_Estate_and_Intangible_Ass5

Real Estate and Intangible Assets - Summary of Properties Acquired (Parenthetical) (Detail) (USD $)	6 Months Ended			1 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Nov. 30, 2005	Jun. 30, 2013	Apr. 30, 2013
				Clintonville, WI [Member]	Clintonville, WI [Member]	Clintonville, WI [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Total purchase price	$74,911	$36,738	'	$5,300	$3,250	'
Total investment in property	$684,001	'	$642,353	'	'	$8,600

Real_Estate_and_Intangible_Ass6

Real Estate and Intangible Assets - Fair Value of Acquired Assets and Assumed Liabilities (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]	'	'
Total Purchase Price	$74,911	$33,488
Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	4,767	1,702
Above Market Leases [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	261	'
Below Market Leases [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	6	'
Discount on Assumed Debt [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	249	'
Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	5,525	'
Allen, TX [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	218	'
Allen, TX [Member] | Discount on Assumed Debt [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	72	'
Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	4,523	'
Colleyville, TX [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	181	'
Colleyville, TX [Member] | Below Market Leases [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	6	'
Colleyville, TX [Member] | Discount on Assumed Debt [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	59	'
Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	8,225	'
Rancho Cordova, CA [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	278	'
Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	5,838	'
Coppell, TX [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	230	'
Coppell, TX [Member] | Discount on Assumed Debt [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	118	'
Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	11,800	'
Columbus, OH [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	990	'
Columbus, OH [Member] | Above Market Leases [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	261	'
Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	39,000	'
Taylor, PA [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	2,870	'
Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	'	5,650
Egg Harbor Township, NJ [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	259
Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	'	13,388
Vance, AL [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	627
Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Total Purchase Price	'	14,450
Blaine, MN [Member] | Customer Relationships [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	816
Land [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	8,443	3,144
Land [Member] | Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	874	'
Land [Member] | Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	1,277	'
Land [Member] | Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	752	'
Land [Member] | Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	1,448	'
Land [Member] | Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	990	'
Land [Member] | Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	3,102	'
Land [Member] | Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	1,627
Land [Member] | Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	457
Land [Member] | Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	1,060
Building [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	45,464	21,803
Building [Member] | Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	3,509	'
Building [Member] | Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	2,307	'
Building [Member] | Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	5,898	'
Building [Member] | Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	3,221	'
Building [Member] | Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	6,080	'
Building [Member] | Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	24,449	'
Building [Member] | Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	2,735
Building [Member] | Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	9,721
Building [Member] | Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	9,347
Tenant Improvements [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	3,541	2,262
Tenant Improvements [Member] | Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	125	'
Tenant Improvements [Member] | Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	117	'
Tenant Improvements [Member] | Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	278	'
Tenant Improvements [Member] | Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	128	'
Tenant Improvements [Member] | Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	1,937	'
Tenant Improvements [Member] | Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	956	'
Tenant Improvements [Member] | Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	282
Tenant Improvements [Member] | Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	808
Tenant Improvements [Member] | Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	1,172
In-Place Leases [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	9,187	3,016
In-Place Leases [Member] | Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	598	'
In-Place Leases [Member] | Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	486	'
In-Place Leases [Member] | Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	473	'
In-Place Leases [Member] | Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	636	'
In-Place Leases [Member] | Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	823	'
In-Place Leases [Member] | Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	6,171	'
In-Place Leases [Member] | Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	558
In-Place Leases [Member] | Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	1,097
In-Place Leases [Member] | Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	1,361
Leasing Costs [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	3,503	1,561
Leasing Costs [Member] | Allen, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	273	'
Leasing Costs [Member] | Colleyville, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	220	'
Leasing Costs [Member] | Rancho Cordova, CA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	546	'
Leasing Costs [Member] | Coppell, TX [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	293	'
Leasing Costs [Member] | Columbus, OH [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	719	'
Leasing Costs [Member] | Taylor, PA [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	1,452	'
Leasing Costs [Member] | Egg Harbor Township, NJ [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	189
Leasing Costs [Member] | Vance, AL [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	678
Leasing Costs [Member] | Blaine, MN [Member]	'	'
Business Acquisition [Line Items]	'	'
Fair value of acquired assets related to the properties acquired	'	$694

Real_Estate_and_Intangible_Ass7

Real Estate and Intangible Assets - Schedule of Revenue and Earnings Recognized on Properties Acquired (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]	'	'	'	'
Rental Revenue	$896	$502	$910	$508
Earnings	431	233	440	236
Allen, TX [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	27-Mar-14	'
Rental Revenue	142	'	150	'
Earnings	81	'	86	'
Colleyville, TX [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	27-Mar-14	'
Rental Revenue	117	'	123	'
Earnings	67	'	71	'
Rancho Cordova, CA [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	22-Apr-14	'
Rental Revenue	173	'	173	'
Earnings	65	'	65	'
Coppell, TX [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	8-May-14	'
Rental Revenue	89	'	89	'
Earnings	52	'	52	'
Columbus, OH [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	13-May-14	'
Rental Revenue	167	'	167	'
Earnings	68	'	68	'
Taylor, PA [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	9-Jun-14	'
Rental Revenue	208	'	208	'
Earnings	98	'	98	'
Egg Harbor Township, NJ [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	'	28-Mar-13
Rental Revenue	'	122	'	128
Earnings	'	69	'	72
Vance, AL [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	'	8-May-13
Rental Revenue	'	170	'	170
Earnings	'	70	'	70
Blaine, MN [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Acquisition Date	'	'	'	10-May-13
Rental Revenue	'	210	'	210
Earnings	'	$94	'	$94

Real_Estate_and_Intangible_Ass8

Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating Data:	'	'	'	'
Total operating revenue	$19,339	$18,822	$38,316	$37,628
Total operating expenses	-10,986	-11,090	-35,799	-21,608
Other expenses	-6,202	-7,566	-13,655	-15,355
Net income (loss)	2,151	166	-11,138	665
Dividends attributable to preferred and senior common stock	-1,133	-1,092	-2,257	-2,169
Net income (loss) available (attributable) to common stockholders	$1,018	($926)	($13,395)	($1,504)
Share and Per Share Data:	'	'	'	'
Basic and diluted earnings (loss) per share of common stock	$0.06	($0.07)	($0.83)	($0.13)
Weighted average shares outstanding-basic	16,547,793	12,380,402	16,149,467	11,808,701
Weighted average shares outstanding-diluted	16,894,973	12,380,402	16,149,467	11,808,701

Real_Estate_and_Intangible_Ass9

Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations (Parenthetical) (Detail) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Jun. 30, 2014
Business Combinations [Abstract]	'	'
Impairment charge	$14,000	$13,958

Recovered_Sheet1

Real Estate and Intangible Assets - Future Operating Lease Payments from Tenants under Non-Cancelable Leases (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Leases [Abstract]	'
Six Months ending December 31, 2014	$34,255
2015	65,830
2016	63,228
2017	62,763
2018	61,125
2019	61,469
Thereafter	$274,216

Recovered_Sheet2

Real Estate and Intangible Assets - Carrying Value of Intangible Assets and Accumulated Amortization (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Lease Intangibles	$131,668	$114,520
Accumulated Amortization	-39,539	-34,888
In-Place Leases [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Lease Intangibles	56,521	47,442
Accumulated Amortization	-17,205	-15,158
Leasing Costs [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Lease Intangibles	35,251	31,339
Accumulated Amortization	-10,680	-9,323
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Lease Intangibles	39,896	35,739
Accumulated Amortization	($11,654)	($10,407)

Recovered_Sheet3

Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'12 years 2 months 12 days	'10 years 10 months 24 days
In-Place Leases [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'10 years 8 months 12 days	'9 years 3 months 18 days
Leasing Costs [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'10 years 8 months 12 days	'9 years 3 months 18 days
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'15 years 7 months 6 days	'14 years 2 months 12 days
Above Market Leases [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'8 years 2 months 12 days	'
Below Market Leases [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Period for intangible assets and liabilities	'11 years 10 months 24 days	'

Recovered_Sheet4

Real Estate and Intangible Assets - Estimated Aggregate Amortization Expense (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
Six Months ending December 31, 2014	$5,834
2015	11,395
2016	10,732
2017	10,539
2018	10,251
2019	10,243
Thereafter	$33,135

Real_Estate_Held_for_Sale_and_2

Real Estate Held for Sale and Impairment Charges - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 06, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014
		sqft		sqft
Real Estate [Abstract]	'	'	'	'
Proceeds from sale of real estate	$11,400	'	'	$11,162
Gain on sale of real estate	1,200	1,240	'	1,240
Impairment loss	'	'	$14,000	$13,958
Expiration period of property lease	'	'	'	'2015-01
Extended period of lease on property	'	'	'	'1 year
Area of industrial property	'	150,000	'	150,000

Real_Estate_Held_for_Sale_and_3

Real Estate Held for Sale and Impairment Charges - Components of Income from Real Estate and Related Assets Held for Sale (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Real Estate Properties [Line Items]	'	'	'	'
Income from real estate and related assets held for sale	$18,390	$14,258	$35,526	$28,293
Real Estate Held for Sale [Member]	'	'	'	'
Real Estate Properties [Line Items]	'	'	'	'
Operating revenue	215	292	507	583
Operating expense	1	57	40	114
Income from real estate and related assets held for sale	$214	$235	$467	$469

Mortgage_Notes_Payable_and_Lin2

Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
	Property
Debt Instrument [Line Items]	'	'
Encumbered properties	91	'
Carrying value	$481,887	$447,002
Stated Interest Rates	'One month LIBOR was approximately 0.1552%.	'
Libor rate	0.16%	'
Variable Rate Line of Credit [Member]	'	'
Debt Instrument [Line Items]	'	'
Encumbered properties	16	'
Carrying value	25,650	24,400
Stated Interest Rates	'LIBOR+3.00%	'
Libor rate	3.00%	'
Scheduled Maturity Dates	1-Aug-17	'
Premiums and Discounts (Net) [Member]	'	'
Debt Instrument [Line Items]	'	'
Carrying value	859	724
Fixed Rate Mortgage Loans [Member]	'	'
Debt Instrument [Line Items]	'	'
Encumbered properties	71	'
Carrying value	447,178	413,678
Variable Rate Mortgage Loans [Member]	'	'
Debt Instrument [Line Items]	'	'
Encumbered properties	4	'
Carrying value	8,200	8,200
Stated Interest Rates	'LIBOR+2.15%	'
Libor rate	2.15%	'
Scheduled Maturity Dates	1-Dec-16	'
Mortgages Notes Payable [Member]	'	'
Debt Instrument [Line Items]	'	'
Encumbered properties	75	'
Carrying value	$456,237	$422,602

Mortgage_Notes_Payable_and_Lin3

Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2014
	Mortgages
Debt Instrument [Line Items]	'
Number of mortgage notes payable	40
Libor rate description	'One month LIBOR was approximately 0.1552%.
Libor rate	0.16%
Weighted average interest rate on all debt outstanding	5.25%
Fixed Rate Mortgage Loans [Member]	'
Debt Instrument [Line Items]	'
Number of mortgage notes payable	40
Maturity date of mortgage notes payable, start date	1-Sep-15
Maturity date of mortgage notes payable, end date	6-Jan-39
Minimum [Member] | Fixed Rate Mortgage Loans [Member]	'
Debt Instrument [Line Items]	'
Stated Interest Rates	4.04%
Maximum [Member] | Fixed Rate Mortgage Loans [Member]	'
Debt Instrument [Line Items]	'
Stated Interest Rates	6.80%

Mortgage_Notes_Payable_and_Lin4

Mortgage Notes Payable and Line of Credit - Additional Information (Detail) (USD $)	0 Months Ended	6 Months Ended		1 Months Ended				6 Months Ended
	Mar. 28, 2014	Jun. 30, 2014	Dec. 31, 2013	Aug. 31, 2013	Jun. 30, 2014	Aug. 31, 2013	Jun. 30, 2014	Jun. 30, 2014
		Mortgages		Senior Unsecured Revolving Credit Facility [Member]	Senior Unsecured Revolving Credit Facility [Member]	Senior Secured Revolving Credit Facility [Member]	Letter of Credit [Member]	Mortgage Notes Payable [Member]
		Property
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Number of mortgage notes payable	'	40	'	'	'	'	'	'
Weighted average interest on debt outstanding	'	5.25%	'	'	'	'	3.00%	5.36%
Number of properties collateralized in mortgage notes payable	'	75	'	'	'	'	'	'
Net book value of collateralized mortgage properties	'	$607,800,000	'	'	'	'	'	'
Number of long-term mortgages issued	'	2	'	'	'	'	'	'
Number of properties to collateralized mortgage notes payable	'	3	'	'	'	'	'	'
Number of long-term mortgages assumed	'	2	'	'	'	'	'	'
Number of properties to issue collateralized mortgage notes payable	'	2	'	'	'	'	'	'
Excess of LIBOR rate	'	'	'	'	'	'	'	3.00%
Fair value of mortgage notes payable outstanding	'	462,100,000	'	'	'	'	'	'
Carrying value of mortgage notes payable outstanding	'	456,237,000	422,602,000	'	'	'	'	'
Line of credit, outstanding	'	25,650,000	24,400,000	60,000,000	25,700,000	75,000,000	'	'
Line of credit, maturity date	'2017-08	'	'	'2017-08	'	'	'	'
Extension period subject to payment of fee	'1 year	'	'	'1 year	'	'	'	'
Extension fee on the initial maturity date	0.25%	'	'	0.25%	'	'	'	'
Standby letters of credit sublimit	'	'	'	20,000,000	'	'	'	'
Line of credit facility, maximum additional amount drawn	'	19,700,000	'	75,000,000	'	'	'	'
Line of credit, variable spread on interest rate	'	'	'	3.00%	'	'	'	'
Annual maintenance fee	'	'	'	30,000	'	'	'	'
Unused commitment fee	'	'	'	0.25%	'	'	'	'
Line of credit covenant limit of distributions to shareholders percentage	'	'	'	100.00%	'	'	'	'
Line of credit facility, maximum additional amount drawn	'	'	'	1,300,000	'	'	'	'
Extension fee on the initial maturity date	'	'	'	0.0025	'	'	'	'
Line of credit at an interest rate	'	'	'	'	3.20%	'	'	'
Letters of credit, outstanding	'	'	'	'	'	'	$6,800,000	'

Mortgage_Notes_Payable_and_Lin5

Mortgage Notes Payable and Line of Credit - Summary of Long Term Mortgages (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Debt Instrument [Line Items]	'	'
Debt Issued	$37,681	$3,700
Wells Fargo N.A [Member] | Maturity Date One [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Issuance	27-Mar-14	'
Issuing Bank	'Wells Fargo N.A.	'
Debt Issued	6,330	'
Interest Rate	5.58%	'
Maturity Date	1-Feb-16	'
Wells Fargo N.A [Member] | Maturity Date Three [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Issuance	8-May-14	'
Issuing Bank	'Wells Fargo N.A.	'
Debt Issued	3,816	'
Interest Rate	6.25%	'
Maturity Date	1-Jun-16	'
Key Bank N.A [Member] | Maturity Date Two [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Issuance	22-Apr-14	'
Issuing Bank	'Keybank N.A.	'
Debt Issued	4,935	'
Interest Rate	4.90%	'
Maturity Date	1-May-24	'
Prudential Mortgage Capital Company [Member] | Maturity Date Four [Member]	'	'
Debt Instrument [Line Items]	'	'
Date of Issuance	9-Jun-14	'
Issuing Bank	'Prudential Mortgage Capital Company	'
Debt Issued	$22,600	'
Interest Rate	4.23%	'
Maturity Date	1-Jul-19	'

Mortgage_Notes_Payable_and_Lin6

Mortgage Notes Payable and Line of Credit - Principal Payments of Mortgage Notes Payable (Detail) (Mortgages Notes Payable [Member], USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Mortgages Notes Payable [Member]	'
Debt Instrument [Line Items]	'
Six Months ending December 31, 2014	$20,798
2015	42,683
2016	98,702
2017	67,201
2018	19,789
2019	34,449
Thereafter	171,756
Total Mortgage Notes Payable	$455,378

Mortgage_Notes_Payable_and_Lin7

Mortgage Notes Payable and Line of Credit - Summary of Interest Rate Cap Agreement (Detail) (Mortgage Notes Payable [Member], USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Mortgage Notes Payable [Member]	'
Debt Instrument [Line Items]	'
Date of Issuance	26-Nov-13
Notional Amount	$8,200
LIBOR Cap	3.00%
Effective Date	30-Jun-14
Maturity Date	1-Dec-16
Cost	31
Fair Value	$7

Mandatorily_Redeemable_Preferr1

Mandatorily Redeemable Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended
	Feb. 29, 2012	Jun. 30, 2014	Dec. 31, 2013
Class of Stock [Line Items]	'	'	'
Public offering of preferred stock	'	2,150,000	2,150,000
Preferred stock, par value	'	$0.00	$0.00
Preferred shares at a redemption price	$25	'	'
Preferred Stock redemption term	'	'On or after January 31, 2016, we may redeem the shares at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends to and including the date of redemption.	'
Preferred Stock mandatory redemption date	31-Jan-17	'	'
Deferred financing costs	$1,800,000	'	'
Fair value of term preferred stock	'	38,500,000	38,500,000
Carrying value term preferred stock	'	2,000	2,000
Mandatorily Redeemable Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Public offering of preferred stock	1,540,000	'	'
Preferred stock, par value	$0.00	'	'
Public offering price	$25	'	'
Gross proceeds of the offering totaled	38,500,000	'	'
Net proceeds, after deducting offering expenses	36,700,000	'	'
Fair value of term preferred stock	'	40,200,000	'
Carrying value term preferred stock	'	$38,500,000	'
Closing price of term preferred stock	'	$26.10	'
Series C Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Series C preferred stock	7.13%	'	'
Series C Preferred Stock [Member] | Mandatorily Redeemable Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Public offering of preferred stock	'	1,540,000	1,540,000
Preferred stock, par value	'	$0.00	$0.00

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
	Lease
Commitments And Contingencies Disclosure [Abstract]	'	'
Number of leases	3	'
Expenses incurred for the properties listed	$0.20	$0.20

Commitments_and_Contingencies_2

Commitments and Contingencies - Future Minimum Rental Payments Due under Terms of Leases (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Operating Leased Assets [Line Items]	'
For the year ended December 31, 2014	$34,255
For the year ended December 31, 2015	63,228
For the year ended December 31, 2016	62,763
For the year ended December 31, 2017	61,125
For the year ended December 31, 2018	61,469
Ground Leases [Member]	'
Operating Leased Assets [Line Items]	'
For the year ended December 31, 2014	206
For the year ended December 31, 2015	413
For the year ended December 31, 2016	413
For the year ended December 31, 2017	416
For the year ended December 31, 2018	417
For the year ended December 31, 2019	417
Thereafter	4,501
Ground Leases [Member] | Tulsa, OK [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2021-04
For the year ended December 31, 2014	76
For the year ended December 31, 2015	153
For the year ended December 31, 2016	153
For the year ended December 31, 2017	153
For the year ended December 31, 2018	153
For the year ended December 31, 2019	153
Thereafter	229
Ground Leases [Member] | Dartmouth, MA [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2036-05
For the year ended December 31, 2014	87
For the year ended December 31, 2015	174
For the year ended December 31, 2016	174
For the year ended December 31, 2017	174
For the year ended December 31, 2018	174
For the year ended December 31, 2019	174
Thereafter	3,300
Ground Leases [Member] | Springfield, MA [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2030-02
For the year ended December 31, 2014	43
For the year ended December 31, 2015	86
For the year ended December 31, 2016	86
For the year ended December 31, 2017	89
For the year ended December 31, 2018	90
For the year ended December 31, 2019	90
Thereafter	$972

Commitments_and_Contingencies_3

Commitments and Contingencies - Future Tenant Improvement Payments Due on Properties (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Operating Leased Assets [Line Items]	'
2014	$34,255
2015	63,228
2016	62,763
2017	61,125
2018	61,469
Tenant Improvements [Member]	'
Operating Leased Assets [Line Items]	'
2014	1,685
2015	'
2016	'
2017	'
2018	'
2019	'
Thereafter	'
Tenant Improvements [Member] | Canton, NC [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2024-07
2014	1,306
2015	'
2016	'
2017	'
2018	'
2019	'
Thereafter	'
Tenant Improvements [Member] | Concord Township, OH [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2034-08
2014	150
2015	'
2016	'
2017	'
2018	'
2019	'
Thereafter	'
Tenant Improvements [Member] | Egg Harbor Township, NJ [Member]	'
Operating Leased Assets [Line Items]	'
Lease End Date	'2023-04
2014	229
2015	'
2016	'
2017	'
2018	'
2019	'
Thereafter	'

Commitments_and_Contingencies_4

Commitments and Contingencies - Future Tenant Improvement Payments Due on Properties (Parenthetical) (Detail) (Tenant Improvements [Member])	6 Months Ended
	Jun. 30, 2014
Tenant Improvements [Member]	'
Operating Leased Assets [Line Items]	'
Extended lease period	'20 years
Lease expiration year	'2034-09
Projected completion period of property expansion	'2034-09

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Changes in Stockholders' Equity (Detail) (USD $)

3 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Senior Common Stock [Member]

Senior Common Stock [Member]

Preferred Stock [Member]

Preferred Stock [Member]

Common Stock [Member]

Additional Paid in Capital [Member]

Notes Receivable from Employees [Member]

Notes Receivable from Employees [Member]

Distributions in Excess of Accumulated Earnings [Member]

Class of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Beginning balance

'

'

$183,146

'

$0

$0

$2

$2

$16

$298,751

($375)

($375)

($115,248)

Issuance of senior common stock and common stock, net

'

'

34,101

'

'

'

'

'

2

34,099

'

'

'

Distributions declared to common, senior common and preferred stockholders

'

'

-14,400

'

'

'

'

'

'

'

'

'

-14,400

Net loss

1,219

451

-12,297

883

'

'

'

'

'

'

'

'

-12,297

Ending balance

$190,550

'

$190,550

'

$0

$0

$2

$2

$18

$332,850

($375)

($375)

($141,945)

Stockholders_Equity_Dividends_

Stockholders' Equity - Dividends Declared (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Common Stock [Member]	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'
Common Stock, distributions declared per share	$0.38	$0.38	$0.75	$0.75
Senior Common Stock [Member]	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'
Common Stock, distributions declared per share	$0.26	$0.26	$0.53	$0.53
Series A Preferred Stock [Member]	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'
Preferred Stock, distributions declared per share	$0.48	$0.48	$0.97	$0.97
Series B Preferred Stock [Member]	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'
Preferred Stock, distributions declared per share	$0.47	$0.47	$0.94	$0.94
Series C Preferred Stock [Member]	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'
Preferred Stock, distributions declared per share	$0.45	$0.45	$0.89	$0.89

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 06, 2014	Mar. 31, 2011	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Dividends Payable [Line Items]	'	'	'	'	'	'
Common stock, shares issued	17,715,958	'	'	17,715,958	'	15,662,414
Gross proceeds of initial public offering	'	$27,400,000	'	'	'	'
Net proceeds of initial public offering	'	26,000,000	'	'	'	'
Maximum aggregate sales price of shares to be issued under open market sale agreement	25,000,000	'	'	25,000,000	'	'
Net proceeds under ATM program	'	'	'	7,600,000	'	'
Number of shares sold under open market sale agreement	1,200,000	'	'	1,200,000	'	'
Gross proceeds of shares sold under open market sale agreement	'	'	'	21,800,000	'	'
Maximum remaining capacity to sell common stock under open market sale agreement	3,200,000	'	'	3,200,000	'	'
Common stock, par value	$0.00	'	'	$0.00	'	$0.00
Shares intended to be offered pursuant to primary offering	'	'	3,000,000	'	'	'
Shares intended to be offered pursuant to senior common distribution reinvestment plan	'	'	500,000	'	'	'
Shares of senior common stock sold in ongoing offering	369,553	'	'	'	'	'
Senior common stock ongoing offering, gross proceeds	'	'	'	36,042,000	57,219,000	'
Shares of senior common stock issued	441,774	'	'	441,774	'	374,484
Maximum remaining capacity to sell senior common stock	47,000,000	'	'	47,000,000	'	'
Public Offering [Member]	'	'	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'	'	'
Common stock, shares issued	'	1,610,000	'	'	'	'
Public offering price per share	'	$17	'	'	'	'
Senior Common Stock [Member]	'	'	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'	'	'
Common stock, shares issued	'	'	3,500,000	'	'	'
Common stock, par value	'	'	0.001	'	'	'
Common stock shares issued, selling price	'	'	15	'	'	'
Senior common stock ongoing offering, gross proceeds	$5,500,000	'	'	'	'	'
Distribution Reinvestment Plan [Member]	'	'	'	'	'	'
Dividends Payable [Line Items]	'	'	'	'	'	'
Shares of senior common stock issued	15,008	'	'	15,008	'	'

Stockholders_Equity_Summary_of1

Stockholders' Equity - Summary of Outstanding Note Receivable from an Employee for the Exercise of Stock Options (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt Conversion [Line Items]	'	'
Outstanding Balance of Employee Loan	$375	$375
Note Outstanding One [Member]	'	'
Debt Conversion [Line Items]	'	'
Date Issued	'2006-11	'
Outstanding Balance of Employee Loan	$375	$375
Maturity Date of Note	'2015-11	'
Interest Rate on Note	8.15%	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	6 Months Ended		0 Months Ended			0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jul. 25, 2014	Jul. 07, 2014	Jul. 25, 2014	Jul. 01, 2014	Jul. 01, 2014
	sqft		Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
					sqft	Aurora Colorado [Member]	Aurora Colorado [Member]
						Option	sqft
						sqft
Subsequent Event [Line Items]	'	'	'	'	'	'	'
Acquisition of our property, area	150,000	'	'	'	81,371	'	124,800
Acquisition of our property, value	$74,911,000	$36,738,000	'	'	'	$8,300,000	'
Acquisition Expenses	'	'	'	'	'	80,000	'
Lease term	'	'	'	'	'	'15 years	'
Renew lease options	'	'	'	'	'	2	'
Renew the lease for additional periods	'	'	'	'	'	'5 years	'
Annualized straight line rent escalations	'	'	'	'	'	800,000	'
Period for lease expiration	'	'	'	'2015-03	'	'	'
Extended lease period	'	'	'	'2020-03	'	'	'
Annualized straight line rent escalations	'	'	'	600,000	'	'	'
Lease commission to be paid	765,000	394,000	'	100,000	'	'	'
Amount to be paid for tenant improvements	'	'	'	900,000	'	'	'
Second mortgage development loan	'	'	'	'	$5,600,000	'	'
Construction loans scheduled maturity	'	'	'12 months	'	'	'	'
Percentage of Interest earned in cash	'	'	'	'	9.00%	'	'
Estimated percentage of rate of Interest	'	'	'	'	22.00%	'	'
Mortgage development loan scheduled maturity	'	'	'2016-07	'	'	'	'

Subsequent_Events_Monthly_Dist

Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) (USD $)	0 Months Ended
	Jul. 15, 2014
Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Record Date	25-Jul-14
Payment Date	5-Aug-14
Payable to the Holders of Records During the Month	'July
Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Record Date	20-Aug-14
Payment Date	29-Aug-14
Payable to the Holders of Records During the Month	'August
Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Record Date	19-Sep-14
Payment Date	30-Sep-14
Payable to the Holders of Records During the Month	'September
Senior Common Stock [Member] | Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.0875
Payment Date	7-Aug-14
Senior Common Stock [Member] | Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.0875
Payment Date	8-Sep-14
Senior Common Stock [Member] | Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.0875
Payment Date	7-Oct-14
Senior Common Stock [Member] | Subsequent Event [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.2625
Common Stock [Member] | Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.125
Common Stock [Member] | Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.125
Common Stock [Member] | Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.125
Common Stock [Member] | Subsequent Event [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.375
Series A Preferred Stock [Member] | Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1614583
Series A Preferred Stock [Member] | Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1614583
Series A Preferred Stock [Member] | Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1614583
Series A Preferred Stock [Member] | Subsequent Event [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.4843749
Series B Preferred Stock [Member] | Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.15625
Series B Preferred Stock [Member] | Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.15625
Series B Preferred Stock [Member] | Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.15625
Series B Preferred Stock [Member] | Subsequent Event [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.46875
Series C Preferred Stock [Member] | Subsequent Event A [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1484375
Series C Preferred Stock [Member] | Subsequent Event B [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1484375
Series C Preferred Stock [Member] | Subsequent Event C [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.1484375
Series C Preferred Stock [Member] | Subsequent Event [Member]	'
Dividends Payable [Line Items]	'
Distribution per Share	0.4453125