Schedule III - Real Estate Assets and Accumulated Depreciation Summary of Transactions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
SEC Schedule III, Real Estate Assets and Accumulated Depreciation [Line Items]
Investment in Real Estate, balance at beginning of period	$ 3,595,278		$ 3,605,137	$ 3,697,160
Additions through capital expenditures	27,217		29,142	64,423
Acquisitions			82,324	8,809
Asset impairments	(3,335)		(10,154)	(4,040)
Disposals/Other	(266,218)		(111,171)	(161,215)
Investment in Real Estate, balance at end of period	3,352,942	[1]	3,595,278	3,605,137
Accumulated Depreciation, balance at beginning of period	(1,128,563)		(1,053,670)
Depreciation	(81,693)		(89,008)	(87,492)
Disposals/Other	16,205		14,115	109,211
Accumulated Depreciation, balance at end of period	$ (1,194,051)	[2]	$ (1,128,563)	$ (1,053,670)

[1] The aggregate cost of properties for federal income tax purposes is approximately $3.7 billion at December 31, 2021.

[2] Depreciation is calculated using estimated useful lives of depreciable assets up to 50 years for prison facilities.