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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2001 Miami Airport Litigation | Jun. 30, 2011 Brendan Airways Litigation
Legal Matters |  |
Number of defendants | 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 |  | $ 4.5

X
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X
- Definition Represents the number of defendants against whom suit was filed to seek reimbursement for the cost of remediating environmental contamination. + Details
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- Definition Represents the number of potentially responsible parties including the entity, who were advised of their potential liability for the clean-up costs of the contamination that is the subject of the County Suit. + Details
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