Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Taxes [Line Items]
Minimum Distribution Percentage of Taxable Income to Qualify for Real Estate Investment Trust				90.00%
Income tax expense	$ 369,000		$ 1,486,000	$ 3,183,000	$ 5,942,000
Lease expiration term				20 years
Deferred employer side social security payments				$ 19,600,000
Liabilities for uncertain tax positions	0			0		$ 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			$ 0