Business Combinations (Details)		3 Months Ended	9 Months Ended
	Feb. 17, 2015 USD ($) facility bed	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 615,937,000	$ 615,937,000	$ 493,890,000
LCS Facilities
Business Acquisition [Line Items]
Number of correctional and detention facilities acquired | facility	8
Number of beds In facilities acquired (more than 6,500) | bed	6,500
Total consideration paid	$ 307,403,000
Goodwill	107,398,000
Contingent consideration arrangements, performance period			18 months
Aggregate amount of purchase price, maximum		350,000,000	$ 350,000,000
Contingent consideration value		0	$ 0
Repayments of debt	298,000,000
Retrospective adjustment related to working capital	$ 100,000
LCS Facilities | Customer Relationships
Business Acquisition [Line Items]
Identifiable intangible assets, useful life			20 years
LCS Facilities | General and Administrative Expense
Business Acquisition [Line Items]
Acquisition related costs		$ 2,100,000