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Ravenhall Prison Project (Details) In Millions, unless otherwise specified	0 Months Ended
	Sep. 16, 2014 Ravenhall The GEO Group Australia	Sep. 16, 2014 Ravenhall The GEO Group Australia Bed inmate	Sep. 30, 2014 Ravenhall, Australia Non Recourse Debt National Australia Bank Limited Ravenhall Construction Facility USD ($)	Sep. 30, 2014 Ravenhall, Australia Non Recourse Debt National Australia Bank Limited Ravenhall Construction Facility AUD
Other Commitments [Line Items]
Number of beds in a facility		1,000
Number of inmates in the facility		1,300
Operation of the facility contract term	25 years
Lump sum due at completion			$ 270.5	310.0