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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 |

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