Gladstone Commercial Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Detail)

Mortgage Notes Payable and Line of Credit - Company's Mortgage Notes Payable and Line of Credit (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2013
Debt Instrument [Line Items]
Premiums and (Discounts), net	$ 707	$ 724
Total Mortgage Notes Payable	459,299us-gaap_SecuredLongTermDebt	422,602us-gaap_SecuredLongTermDebt
Variable-Rate Line of Credit	43,300us-gaap_LineOfCredit	24,400us-gaap_LineOfCredit	60,000us-gaap_LineOfCredit
Total Mortgage Notes Payable and Line of Credit	502,599us-gaap_LongTermDebt	447,002us-gaap_LongTermDebt
Variable-Rate Line of Credit [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Aug. 07, 2013
Principal Maturity Date	Aug. 07, 2017
Variable-Rate Line of Credit, Stated Interest Rate	LIBOR +3.00%
Variable-Rate Line of Credit	43,300	24,400
Mortgage Notes Payable [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	458,592	421,878
Mortgage Notes Payable One [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Feb. 21, 2006
Principal Maturity Date	Jun. 30, 2014
Stated Interest Rate on Note	5.20%
Principal Balance Outstanding		17,455
Mortgage Notes Payable Two [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Aug. 25, 2005
Principal Maturity Date	Sep. 01, 2015
Stated Interest Rate on Note	5.33%
Principal Balance Outstanding	19,262	19,664
Mortgage Notes Payable Three [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Sep. 12, 2005
Principal Maturity Date	Sep. 01, 2015
Stated Interest Rate on Note	5.21%
Principal Balance Outstanding	11,369	11,593
Mortgage Notes Payable Four [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Sep. 06, 2007
Principal Maturity Date	Dec. 11, 2015
Stated Interest Rate on Note	5.81%
Principal Balance Outstanding	3,964	4,052
Mortgage Notes Payable Five [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 21, 2005
Principal Maturity Date	Jan. 08, 2016
Stated Interest Rate on Note	5.71%
Principal Balance Outstanding	17,482	17,816
Mortgage Notes Payable Six [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Mar. 27, 2014
Principal Maturity Date	Feb. 01, 2016
Stated Interest Rate on Note	5.58%
Principal Balance Outstanding	6,214
Mortgage Notes Payable Seven [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Mar. 29, 2006
Principal Maturity Date	Apr. 01, 2016
Stated Interest Rate on Note	5.92%
Principal Balance Outstanding	16,201	16,434
Mortgage Notes Payable Eight [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Apr. 27, 2006
Principal Maturity Date	May 05, 2016
Stated Interest Rate on Note	6.58%
Principal Balance Outstanding	12,316	12,696
Mortgage Notes Payable Nine [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Aug. 29, 2008
Principal Maturity Date	Jun. 01, 2016
Stated Interest Rate on Note	6.80%
Principal Balance Outstanding	5,510	5,687
Mortgage Notes Payable Ten [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	May 08, 2014
Principal Maturity Date	Jun. 01, 2016
Stated Interest Rate on Note	6.25%
Principal Balance Outstanding	3,767
Mortgage Notes Payable Eleven [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jun. 20, 2011
Principal Maturity Date	Jun. 30, 2016
Stated Interest Rate on Note	6.08%
Principal Balance Outstanding	10,977	11,164
Mortgage Notes Payable Twelve [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Nov. 22, 2006
Principal Maturity Date	Dec. 01, 2016
Stated Interest Rate on Note	5.76%
Principal Balance Outstanding	13,093	13,324
Mortgage Notes Payable Thirteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Nov. 26, 2013
Principal Maturity Date	Dec. 01, 2016
Stated Interest Rate on Note	2.15%
Stated Interest Rate on Note	LIBOR +2.15%
Principal Balance Outstanding	8,200	8,200
Mortgage Notes Payable Fourteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 22, 2006
Principal Maturity Date	Jan. 01, 2017
Stated Interest Rate on Note	5.79%
Principal Balance Outstanding	20,026	20,376
Mortgage Notes Payable Fifteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Feb. 08, 2007
Principal Maturity Date	Mar. 01, 2017
Stated Interest Rate on Note	6.00%
Principal Balance Outstanding	13,775	13,775
Mortgage Notes Payable Sixteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jun. 05, 2007
Principal Maturity Date	Jun. 08, 2017
Stated Interest Rate on Note	6.11%
Principal Balance Outstanding	13,825	13,999
Mortgage Notes Payable Seventeen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Oct. 15, 2007
Principal Maturity Date	Nov. 08, 2017
Stated Interest Rate on Note	6.63%
Principal Balance Outstanding	14,609	14,848
Mortgage Notes Payable Eighteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Sep. 26, 2012
Principal Maturity Date	Jul. 01, 2018
Stated Interest Rate on Note	5.75%
Principal Balance Outstanding	10,252	10,478
Mortgage Notes Payable Nineteen [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Nov. 18, 2011
Principal Maturity Date	Nov. 01, 2018
Stated Interest Rate on Note	4.50%
Principal Balance Outstanding	4,049	4,155
Mortgage Notes Payable Twenty [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jun. 09, 2014
Principal Maturity Date	Jul. 01, 2019
Stated Interest Rate on Note	4.23%
Principal Balance Outstanding	22,600
Mortgage Notes Payable Twenty One [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 06, 2011
Principal Maturity Date	Dec. 06, 2019
Stated Interest Rate on Note	6.00%
Principal Balance Outstanding	7,776	8,031
Mortgage Notes Payable Twenty Two [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Oct. 28, 2011
Principal Maturity Date	Nov. 01, 2021
Stated Interest Rate on Note	6.00%
Principal Balance Outstanding	6,799	6,938
Mortgage Notes Payable Twenty Three [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Apr. 05, 2012
Principal Maturity Date	May 01, 2022
Stated Interest Rate on Note	6.10%
Principal Balance Outstanding	18,116	18,467
Mortgage Notes Payable Twenty Four [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jun. 21, 2012
Principal Maturity Date	Jul. 06, 2022
Stated Interest Rate on Note	5.05%
Principal Balance Outstanding	4,507	4,608
Mortgage Notes Payable Twenty Five [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Aug. 03, 2012
Principal Maturity Date	Jul. 31, 2022
Stated Interest Rate on Note	5.00%
Principal Balance Outstanding	2,845	2,911
Mortgage Notes Payable Twenty Six [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jul. 24, 2012
Principal Maturity Date	Aug. 01, 2022
Stated Interest Rate on Note	5.60%
Principal Balance Outstanding	9,066	9,361
Mortgage Notes Payable Twenty Seven [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Oct. 01, 2012
Principal Maturity Date	Oct. 01, 2022
Stated Interest Rate on Note	4.86%
Principal Balance Outstanding	32,397	33,133
Mortgage Notes Payable Twenty Eight [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Nov. 21, 2012
Principal Maturity Date	Dec. 06, 2022
Stated Interest Rate on Note	4.04%
Principal Balance Outstanding	18,067	18,525
Mortgage Notes Payable Twenty Nine [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Mar. 28, 2013
Principal Maturity Date	Apr. 06, 2023
Stated Interest Rate on Note	4.16%
Principal Balance Outstanding	3,551	3,638
Mortgage Notes Payable Thirty [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jul. 03, 2013
Principal Maturity Date	Aug. 01, 2023
Stated Interest Rate on Note	5.00%
Principal Balance Outstanding	8,045	8,163
Mortgage Notes Payable Thirty One [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jul. 10, 2013
Principal Maturity Date	Aug. 01, 2023
Stated Interest Rate on Note	4.20%
Principal Balance Outstanding	8,704	8,852
Mortgage Notes Payable Thirty Two [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jul. 09, 2013
Principal Maturity Date	Aug. 06, 2023
Stated Interest Rate on Note	4.81%
Principal Balance Outstanding	34,567	35,093
Mortgage Notes Payable Thirty Three [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 27, 2013
Principal Maturity Date	Jan. 01, 2024
Stated Interest Rate on Note	5.28%
Principal Balance Outstanding	4,297	4,380
Mortgage Notes Payable Thirty Four [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Apr. 22, 2014
Principal Maturity Date	May 01, 2024
Stated Interest Rate on Note	4.90%
Principal Balance Outstanding	4,935
Mortgage Notes Payable Thirty Five [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Sep. 03, 2014
Principal Maturity Date	Oct. 01, 2024
Stated Interest Rate on Note	4.40%
Principal Balance Outstanding	6,100
Mortgage Notes Payable Thirty Six [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 23, 2014
Principal Maturity Date	Jan. 01, 2025
Stated Interest Rate on Note	4.04%
Principal Balance Outstanding	18,426
Mortgage Notes Payable Thirty Seven [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 15, 2010
Principal Maturity Date	Dec. 10, 2026
Stated Interest Rate on Note	6.63%
Principal Balance Outstanding	9,015	9,496
Mortgage Notes Payable Thirty Eight [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	May 16, 2012
Principal Maturity Date	Dec. 31, 2026
Stated Interest Rate on Note	4.30%
Principal Balance Outstanding	2,757	2,829
Mortgage Notes Payable Thirty Nine [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Nov. 08, 2012
Principal Maturity Date	Feb. 01, 2027
Stated Interest Rate on Note	5.69%
Principal Balance Outstanding	13,567	13,864
Mortgage Notes Payable Forty [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	May 30, 2012
Principal Maturity Date	May 10, 2027
Stated Interest Rate on Note	6.50%
Principal Balance Outstanding	4,426	4,653
Mortgage Notes Payable Forty One [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Jun. 27, 2012
Principal Maturity Date	Jul. 01, 2029
Stated Interest Rate on Note	5.10%
Principal Balance Outstanding	1,823	1,905
Mortgage Notes Payable Forty Two [Member]
Debt Instrument [Line Items]
Date of Issuance/ Assumption	Dec. 18, 2013
Principal Maturity Date	Jan. 06, 2039
Stated Interest Rate on Note	4.74%
Principal Balance Outstanding	$ 11,315	$ 11,315