v3.26.1
Fair Value of Investments- Summary of Plan"s Investments carried at Fair Value on Recurring Basis (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value $ 277,523,236 $ 234,336,586
The GEO Group, Inc. Common Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 4,654,173 7,770,093
Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 253,639,213 207,392,241
Quoted Prices in Active Markets for Identical Assets (Level 1)    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 258,293,386 215,162,334
Quoted Prices in Active Markets for Identical Assets (Level 1) | The GEO Group, Inc. Common Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 4,654,173 7,770,093
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 253,639,213 207,392,241
Significant Observable Inputs (Level 2)    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Significant Observable Inputs (Level 2) | The GEO Group, Inc. Common Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Significant Observable Inputs (Level 2) | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Significant Unobservable Inputs (Level 3)    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Significant Unobservable Inputs (Level 3) | The GEO Group, Inc. Common Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Significant Unobservable Inputs (Level 3) | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Level 1, Level 2 and Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 258,293,386 215,162,334
Fair Value Measured at Net Asset Value | Collective Trust Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value $ 19,229,850 $ 19,174,252