Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Minimum Distribution Percentage of Taxable Income to Qualify for Real Estate Investment Trust				90.00%
TCJA enacted date				Dec. 22, 2017
U.S. federal corporate tax rate				21.00%	21.00%	21.00%	35.00%
TCJA one time transition tax				$ 0
Effect of change in income tax associated with the ACT		$ 1,000,000.0	$ 4,500,000
Lease expiration term				20 years
Effective tax rate				7.30%	4.00%	5.00%
Deferred employer side social security payments				$ 29,600,000
Liabilities for uncertain tax positions				0	$ 0
Minimum
Income Taxes [Line Items]
Estimated income tax charge				100,000,000.0
Maximum
Income Taxes [Line Items]
Estimated income tax charge				135,000,000.0
Lansing Correctional Facility
Income Taxes [Line Items]
Income tax expense deferred during construction period	$ 3,100,000
Deferred tax asset revalued upon conversion of TRS to QRS				$ 0