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Schedule of Financial Instruments Having Difference Between Carrying Amount and Fair Value (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Note receivable from Agecroft Prison Management, LTD, Carrying Amount $ 2,794 $ 2,989
Debt, Carrying Amount (2,289,958) (1,986,865)
Note receivable from Agecroft Prison Management, LTD, Fair Value 3,675 3,949
Debt, Fair Value $ (2,235,329) $ (1,964,366)