Gladstone Commercial Corporation Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Total Purchase Price	$ 6,315	$ 14,341
Customer relationships
Business Acquisition [Line Items]
Assets Acquired	196	566
Above market leases
Business Acquisition [Line Items]
Assets Acquired	23	49
Land
Business Acquisition [Line Items]
Assets Acquired	723	459
Building
Business Acquisition [Line Items]
Assets Acquired	4,541	11,609
Tenant Improvements
Business Acquisition [Line Items]
Assets Acquired	93	615
In-place leases
Business Acquisition [Line Items]
Assets Acquired	432	509
Leasing costs
Business Acquisition [Line Items]
Assets Acquired	$ 307	$ 534