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Debt (Debt Repurchases) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ 1,654,000	$ 0	$ 4,693,000	$ 1,563,000
5.125% Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate	5.125%		5.125%			5.125%
5.875% Senior Notes due 2022
Debt Instrument [Line Items]
Stated interest rate	5.875%		5.875%			5.875%
Amended Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100,000,000.0		$ 100,000,000.0
Gain (loss) on extinguishment of debt					$ (1,200,000)
6.00% Senior Notes due 2026
Debt Instrument [Line Items]
Stated interest rate	6.00%		6.00%			6.00%
Senior Notes and Term Loan
Debt Instrument [Line Items]
Debt instrument, repurchased face amount			On February 11, 2021, the Board authorized a new repurchase program for repurchases/retirements of the above referenced GEO Senior Notes and term loan, subject to certain limitations up to an aggregate maximum of $100.0 million through December 31, 2022.
5.875% Senior Notes due 2024
Debt Instrument [Line Items]
Stated interest rate	5.875%		5.875%			5.875%
Senior Notes | 5.125% Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate	5.125%	5.125%	5.125%	5.125%		5.125%
Debt instrument, repurchased face amount	$ 22,500,000	$ 5,500,000	$ 22,500,000	$ 5,500,000
Percentage of principal amount redeemed			90.68%	70.68%
Repurchase amount	$ 20,400,000	$ 3,900,000	$ 20,400,000	$ 3,900,000
Gain (loss) on extinguishment of debt			$ 5,600,000	$ 1,600,000
Senior Notes | 5.875% Senior Notes due 2022
Debt Instrument [Line Items]
Stated interest rate	5.875%		5.875%			5.875%
Senior Notes | 6.00% Senior Notes due 2026
Debt Instrument [Line Items]
Stated interest rate	6.00%		6.00%			6.00%
Senior Notes | 5.875% Senior Notes due 2024
Debt Instrument [Line Items]
Stated interest rate	5.875%		5.875%			5.875%
Debt instrument, repurchased face amount	$ 17,200,000		$ 17,200,000
Percentage of principal amount redeemed			79.51%
Repurchase amount	$ 13,700,000		$ 13,700,000

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