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

Real Estate and Intangible Assets - Carrying Value of Lease Intangibles and Accumulated Amortization for Each Intangible Asset or Liability Class (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Estimated Amortization Expense	$ 5,492	$ 2,000
Amortization of intangible assets	1,100	741	$ 842
Lease intangibles:
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	6,878	3,273
Accumulated amortization	(1,386)	(1,273)
Estimated Amortization Expense	5,492	2,000
Leasehold interests – land
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	3,498	0
In-place leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	1,451	1,481
Amortization of intangible assets	102	9	$ 20
Leasing costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	1,490	1,086
Tenant relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 439	$ 706