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

Summary Of Significant Accounting Policies (Narrative) (Details)

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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Line Items]      
Change in estimates, reduction of net income $ 7.6    
Change in estimates, reduction of basic and diluted earnings per share $ 0.05    
Reclassification of cash flows to better reflect income from maintenance receipts   $ 59.2 $ 26.7
Percentage of estimates for residual values of original manufacture cost 15.00%    
Flight Equipment Held For Operating Leases [Member]
     
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful life of asset, years 25    
Maximum [Member]
     
Summary Of Significant Accounting Policies [Line Items]      
Percentage of depreciation 33.00%    
Minimum [Member]
     
Summary Of Significant Accounting Policies [Line Items]      
Percentage of depreciation 16.00%