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

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
May. 14, 2014
Income Tax Disclosure [Line Items]        
Unrecognized tax benefits $ 15,500,000 $ 12,400,000   $ 5,400,000
Net deferred tax (liability) asset (204,187,000) (93,834,000)    
Deferred income tax assets 161,193,000 190,029,000    
Deferred income tax liabilities 365,380,000 283,863,000    
Valuation allowance on tax assets 72,000,000 $ 61,933,000  
Release of valuation allowance $ 25,000,000      
The Netherlands [Member]        
Income Tax Disclosure [Line Items]        
Corporate income tax rate [1] 25.00% 25.00% 25.00%  
Net deferred tax (liability) asset $ 8,644,000 $ 15,689,000    
Valuation allowance on tax assets $ 13,915,000      
Carried back period 1 year      
Carry forward period 9 years      
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets $ 13,915,000      
Ireland [Member]        
Income Tax Disclosure [Line Items]        
Corporate income tax rate [1] 12.50% 12.50% 12.50%  
Net deferred tax (liability) asset $ (287,049,000) $ (114,019,000)    
Valuation allowance on tax assets 0      
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets $ 0      
United States Of America [Member]        
Income Tax Disclosure [Line Items]        
Corporate income tax rate [1] 36.30% 38.30% 35.60%  
Blended federal and state tax rate 36.30%      
Net deferred tax (liability) asset $ 68,635,000 $ 13,910,000    
Valuation allowance on tax assets 35,074,000 25,000,000    
U.S. federal net operating losses 91,700,000      
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets 10,074,000      
Australia [Member]        
Income Tax Disclosure [Line Items]        
Valuation allowance on tax assets 23,000,000 $ 36,900,000    
ILFC [Member] | United States Of America [Member]        
Income Tax Disclosure [Line Items]        
Release of valuation allowance 25,000,000      
AeroTurbine, Inc. [Member] | United States Of America [Member]        
Income Tax Disclosure [Line Items]        
Valuation allowance on tax assets $ 33,300,000      
[1] The local statutory income tax expense for our significant tax jurisdictions (the Netherlands, Ireland, the United States of America and Isle of Man) does not differ from the actual income tax expense.