Commitments and Contingencies and Other (Details Textual) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 USD ($) bed facility	Mar. 31, 2015 Property and Equipment USD ($)	Mar. 31, 2015 National Australia Bank Limited Ravenhall Non-Recourse Debt USD ($)	Mar. 31, 2015 National Australia Bank Limited Ravenhall Non-Recourse Debt AUD	Mar. 31, 2015 National Australia Bank Limited Ravenhall Non-Recourse Debt Construction Facility USD ($)	Mar. 31, 2015 National Australia Bank Limited Ravenhall Non-Recourse Debt Construction Facility AUD	Sep. 30, 2014 National Australia Bank Limited Ravenhall Non-Recourse Debt Construction Facility USD ($)	Sep. 30, 2014 National Australia Bank Limited Ravenhall Non-Recourse Debt Construction Facility AUD	Jan. 28, 2015 Facility management contracts Mesa Verde Detention Facility bed	Feb. 18, 2015 LCS Facilities bed	Feb. 17, 2015 LCS Facilities facility bed
Commitments and Contingencies (Textual) [Abstract]
Estimated construction capital project cost	$ 252.1
Cost already spent on existing capital projects	86.1
Remaining capital required for capital projects	166.0
Contributions in aid of construction			88.4	115.0
Maximum borrowing capacity					608.4	791.0	608.4	791.0
Number of beds in a facility									400
Number of correctional and detention facilities acquired											8
Number of beds In facilities acquired										6,500	6,500
Number of vacant beds at idle facilities marketed to potential customers	4,400
Number of marketed idle facilities	5
Carrying values of idle facilities marketed to potential customers		$ 103.9