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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Apr. 30, 2001 Miami Airport Litigation party person subsidiary | Sep. 30, 2011 Brendan Airways Litigation subsidiary
Legal Matters |  |  |  |  |  |
Number of defendants (in persons) |  |  |  |  | 17 |
Number of Potentially Responsible Parties |  |  |  |  | 250 |
Number of subsidiaries that received a letter |  |  |  |  | 1 |
Number of subsidiaries involved in dispute |  |  |  |  |  | 1
Damages sought by Brendan, plus interest and attorney's fees |  |  |  |  |  | $ 4,500,000
Future minimum lease payments under non-cancelable operating leases |  |  |  |  |  |
2011 (3 months) | 5,271,000 |  | 5,271,000 |  |  |
2012 | 18,484,000 |  | 18,484,000 |  |  |
2013 | 16,394,000 |  | 16,394,000 |  |  |
2014 | 15,435,000 |  | 15,435,000 |  |  |
2015 | 14,150,000 |  | 14,150,000 |  |  |
Thereafter | 40,200,000 |  | 40,200,000 |  |  |
Total future minimum lease payment | 109,934,000 |  | 109,934,000 |  |  |
Rental expenses for properties and equipment | $ 4,700,000 | $ 2,500,000 | $ 13,200,000 | $ 7,200,000 |  |

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