Real Estate Transactions - Additional Information (Detail) shares in Millions								3 Months Ended			6 Months Ended
	Jun. 29, 2021 USD ($) Property	Jun. 25, 2021 USD ($) ft²	May 28, 2021 USD ($) Property	May 24, 2021 USD ($) ft²	Dec. 23, 2020 USD ($) Property	Sep. 30, 2020 Facility Bed	Jan. 02, 2020 USD ($) Property shares	Jun. 30, 2021 USD ($) Bed Property	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($) Bed	Jun. 30, 2021 USD ($) ft² Facility Bed	Jun. 30, 2020 USD ($) Bed	Apr. 30, 2021 Bed	Dec. 31, 2020 USD ($)	Dec. 31, 2019 Bed
Facility Activations Developments And Closures [Line Items]
Number of properties acquired | Property					28		28
Purchase price of real estate							$ 83,200,000
Cash payments to acquire properties							7,700,000
Debt assumed on acquisition of property							$ 52,200,000					$ 52,217,000
Conversion holding period of operating partnership units							2 years
Operating partnership units description											one-for-one basis
Purchase price, net tangible assets							$ 77,400,000
Purchase price, identifiable intangible assets							7,500,000
Purchase price, tenant improvements							$ 4,900,000
Number of properties sold | Property	1		2		42			3
Real estate investment property aggregate selling price	$ 253,000,000.0		$ 73,000,000.0		$ 106,500,000
Net proceeds after the repayment of debt	$ 76,400,000		$ 46,200,000		27,800,000
Net loss on sale properties, after recognizing tax protection payments					$ 17,900,000
Property and equipment, net of accumulated depreciation								$ 2,318,161,000			$ 2,318,161,000			$ 2,350,272,000
Net gain (loss) on sale of properties								38,900,000
Operating Expense								333,070,000		$ 352,927,000	665,954,000	715,242,000
Asset impairments								$ 2,866,000		$ 11,717,000	$ 4,174,000	$ 12,253,000
Safety
Facility Activations Developments And Closures [Line Items]
Number of beds at the facility | Bed								70,000			70,000
Community
Facility Activations Developments And Closures [Line Items]
Number of beds at the center | Bed								5,000			5,000
Idle Properties
Facility Activations Developments And Closures [Line Items]
Number of properties sold | Property								2
Idled Correctional Facilities
Facility Activations Developments And Closures [Line Items]
Number of facility | Facility											5
Idled Non-Core Facilities
Facility Activations Developments And Closures [Line Items]
Net gain (loss) on sale of properties				$ (200,000)
Net carrying value		$ 2,000,000.0		$ 800,000					$ 1,800,000
Area of properties sold | ft²		18,000		12,000
Net proceeds from sale of properties		$ 1,800,000		$ 600,000
Asset impairments									$ 1,300,000
Idled Non-Core Facilities | Safety
Facility Activations Developments And Closures [Line Items]
Number of facility | Facility											1
Number of beds at the facility | Bed								240			240
Net carrying value								$ 3,000,000.0			$ 3,000,000.0
Idled Residential Reentry Facility | CoreCivic Properties
Facility Activations Developments And Closures [Line Items]
Number of facility | Facility											1
Net carrying value								6,300,000			$ 6,300,000
Area of facilities | ft²											37,000
Idle Facilities
Facility Activations Developments And Closures [Line Items]
Number of beds at the facility | Bed										60		60	90
Operating Expense								2,000,000.0		$ 1,900,000	$ 4,100,000	$ 3,700,000
Idle Facilities | Community
Facility Activations Developments And Closures [Line Items]
Number of facility | Facility						4
Net carrying value								$ 13,600,000			$ 13,600,000
Number of beds at the center | Bed								740			740
Tulsa Transitional Center | Covid-19
Facility Activations Developments And Closures [Line Items]
Number of beds at the center | Bed						390
Oklahoma City Transitional Center | Covid-19
Facility Activations Developments And Closures [Line Items]
Number of beds at the center | Bed										200		200
Turley Residential Center in Oklahoma
Facility Activations Developments And Closures [Line Items]
Number of beds at the center | Bed															289
GRES
Facility Activations Developments And Closures [Line Items]
Number of properties acquired | Property							24
Purchase price of real estate											$ 0
Class A Common interest shares issued | shares							1.3
Percentage of voting control							100.00%
Property and equipment, net of accumulated depreciation								$ 6,300,000			6,300,000
GRES | Minimum
Facility Activations Developments And Closures [Line Items]
Increase to equity upon termination of partnership											15,000,000.0
GRES | Maximum
Facility Activations Developments And Closures [Line Items]
Increase to equity upon termination of partnership											$ 20,000,000.0