Debt (Credit Agreement) (Details) - USD ($)		3 Months Ended
	Apr. 18, 2024	Mar. 31, 2025	Dec. 31, 2024
Line of Credit Facility [Line Items]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		London Interbank Offered Rate [Member]
Debt instrument basis spread on variable rate		2.00%
Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 1,275,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt		$ 59,600,000
Credit Agreement
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 450,000,000
Revolver		80,000,000	$ 110,000,000
Long-term debt		$ 393,262,000	$ 422,885,000
Credit Agreement | Term Loan Facility
Line of Credit Facility [Line Items]
Debt instrument, amortization rate	1.25%
Percentage of debt principal amount required to be prepaid before first anniversary	2.00%
Percentage of debt principal amount required to be prepaid before second anniversary	1.00%
Credit Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 310,000,000
Debt instrument, interest rate terms		(i) Alternate Base Rate (as defined below) plus an applicable margin or (ii) Term SOFR (as defined below) (subject to a 0.75% floor) plus an applicable margin, which applicable margin shall, in either case, vary depending on GEO’s total leverage ratio as of the most recent determination date, and the Credit Facility Borrowers will pay a fee in respect of the unused revolving commitments under the Revolving Credit Facility at a per annum rate ranging from 0.25% to 0.50%, in each case depending on GEO’s total leverage ratio as of the most recent determination date, where “Alternate Base Rate” means, for any day, a rate per annum equal to the greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds Rate for such day plus 1/2 of 1% and (c) Term SOFR (as defined below) for a one-month tenor in effect on such day, plus 1%, and “Term SOFR” means the Term Secured Overnight Financing Rate. The loans under the Term Loan Facility (the “Term Loans”) bear interest at a per annum rate equal to either (i) Alternate Base Rate plus an applicable margin for Alternate Base Rate Loans and (ii) Term SOFR (subject to a 0.75% floor) plus an applicable margin for Term SOFR Loans.
Variable rate, floor	0.75%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	SOFR
Debt instrument basis spread on variable rate	1.00%
Debt instrument, maturity date	Apr. 15, 2029
Number of days prior to stated maturity days for springing maturity date	91 days
Maximum value of principal amount outstanding on maturity date	$ 100,000,000
Credit Agreement | Revolving Credit Facility | Senior Notes
Line of Credit Facility [Line Items]
Number of days prior to stated maturity days for springing maturity date	91 days
Maximum value of principal amount outstanding on maturity date	$ 100,000,000
Credit Agreement | Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Unused revolving commitments fee, percentage	0.25%
Credit Agreement | Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Unused revolving commitments fee, percentage	0.50%
Credit Agreement | Revolving Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Debt instrument basis spread on variable rate	0.005%
Credit Agreement | Letter of Credit
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 175,000,000
Revolver
Line of Credit Facility [Line Items]
Revolver		$ 80,000,000
Additional Revolver
Line of Credit Facility [Line Items]
Borrowing capacity remaining		$ 170,400,000
Exchange Credit Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Weighted average interest rates on outstanding borrowings		9.21%
6.50% Exchangeable Senior Notes due 2026
Line of Credit Facility [Line Items]
Stated interest rate		6.50%	6.50%
6.50% Exchangeable Senior Notes due 2026 | Senior Notes
Line of Credit Facility [Line Items]
Stated interest rate		6.50%	6.50%
Long-term debt		$ 0	$ 100,000