Commitments and Contingencies (Contract Awards) (Details)	May 26, 2017 bed contract	Apr. 13, 2017 bed
ICE
Loss Contingencies [Line Items]
Number of beds in detention facility		1,000
Life term of contract		10 years
BOP
Loss Contingencies [Line Items]
Number of contracts awarded | contract	2
Life term of contract	10 years
Number of contracts extended | contract	1
Renewal term	1 year
Big Spring Facility | BOP
Loss Contingencies [Line Items]
Number of beds in detention facility	1,800
Fight Line Facility | BOP
Loss Contingencies [Line Items]
Number of beds in detention facility	1,732