Basis of Presentation - Additional Information (Details)	Mar. 31, 2025 Facility Bed
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of beds \| Bed	77,000
Correctional, detention and residential treatment facilities including projects under development \| Facility	98

Correctional, Detention and Residential Treatment Facilities Including Projects Under Development.

No definition available.

Name:	geo_CorrectionalDetentionAndResidentialTreatmentFacilitiesIncludingProjectsUnderDevelopment
Namespace Prefix:	geo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant