Variable Interest Entities And Investment In Affiliates (Details Textual)			6 Months Ended		6 Months Ended
	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2014 South African Custodial Services Pty Limited USD ($)	Dec. 31, 2013 South African Custodial Services Pty Limited USD ($)	Jun. 30, 2014 Geo Amey USD ($)	Jun. 30, 2014 Geo Amey GBP (£)	Dec. 31, 2013 Geo Amey USD ($)
Schedule of Equity Method Investments [Line Items]
Property and equipment, net	$ 1,737,357,000	$ 1,727,798,000
Ownership percentage in South African Custodial Services Pty. Limited			50.00%		50.00%	50.00%
Equity Method Investments			9,900,000	8,100,000	(2,600,000)		(3,000,000)
Working Capital Line of Credit Issued to GEO Amey						12,000,000
Due from Affiliate, Noncurrent					$ 20,500,000	£ 12,000,000