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

Fair Value Measurements (Fair Value Of Flight Equipment As Of The Measurement Date, The Valuation Technique And The Related Unobservable Inputs) (Details)

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Fair Value Measurements (Fair Value Of Flight Equipment As Of The Measurement Date, The Valuation Technique And The Related Unobservable Inputs) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair value $ 2,957,707 $ 2,367,460
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair value 2,822,545 2,207,757
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair value 135,162 $ 159,703
Flight Equipment Held For Operating Leases [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair value $ 43,100  
Minimum [Member] | Flight Equipment Held For Operating Leases [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value inputs, discount rate 0.00%  
Fair value unobservable input remaining holding period 0 years  
Fair value unobservable input present value of non contractual cash flows 0.00%  
Maximum [Member] | Flight Equipment Held For Operating Leases [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value inputs, discount rate 10.00%  
Fair value unobservable input remaining holding period 1 year  
Fair value unobservable input present value of non contractual cash flows 100.00%  
Weighted Average [Member] | Flight Equipment Held For Operating Leases [Member] | Level 3 [Member] | Income Approach Valuation Technique [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value inputs, discount rate 4.40%  
Fair value unobservable input remaining holding period 1 year  
Fair value unobservable input present value of non contractual cash flows 66.00%