Basis of Presentation (Details) person in Thousands, detainee in Thousands, bed in Thousands	Sep. 30, 2018 person facility detainee bed
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of beds | bed	96
Correctional, detention and residential treatment facilities including projects under development | facility	136
Provision of monitoring services tracking offenders (more than) | person	192
Provision of monitoring services tracking offenders using technology products (in detainees) | detainee	100