Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Accrual For Onerous Contracts (Narrative) (Details)

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Accrual For Onerous Contracts (Narrative) (Details)
12 Months Ended
Dec. 31, 2011
Accrual For Onerous Contracts [Abstract]  
Number of leased aircraft 4
Lease maturity for operating leases mature between 2012 and 2013