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Unconsolidated Equity Method Investment (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 19, 2013
Aircraft
Schedule of Equity Method Investments [Line Items]        
Proceeds from Sale of Flight Equipment $ 832,961us-gaap_ProceedsFromSaleOfFlightEquipment $ 568,045us-gaap_ProceedsFromSaleOfFlightEquipment $ 61,489us-gaap_ProceedsFromSaleOfFlightEquipment  
Customer Advances and Deposits 333,456us-gaap_CustomerAdvancesAndDeposits 442,432us-gaap_CustomerAdvancesAndDeposits    
Percentage Ownership of Aircastle's Outstanding Shares 9.70%ayr_RelatedPartyTransactionPercentageOwnershipofCompanyOutstandingShares      
Movement in Equity Method Investment [Roll Forward]        
Investment in joint venture at December 31, 2012 21,123us-gaap_EquityMethodInvestments      
Earnings from joint venture, net of tax 3,054us-gaap_IncomeLossFromEquityMethodInvestments 53us-gaap_IncomeLossFromEquityMethodInvestments 0us-gaap_IncomeLossFromEquityMethodInvestments  
Investment in joint venture at December 31, 2013 46,453us-gaap_EquityMethodInvestments 21,123us-gaap_EquityMethodInvestments    
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital 667us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital 0us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital 0us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital  
Return of Capital and Cumulative Net Income (Loss) from Equity Method Investment (3,774)ayr_ReturnofCapitalandCumulativeNetIncomeLossfromEquityMethodInvestment      
Equity Method Investee | OTTP        
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Ownership Percentage 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
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Movement in Equity Method Investment [Roll Forward]        
Investment in joint venture at December 31, 2012 21,123us-gaap_EquityMethodInvestments
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Investment in joint venture 26,050ayr_CostofEquityMethodInvestments
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21,070ayr_CostofEquityMethodInvestments
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Earnings from joint venture, net of tax 3,054us-gaap_IncomeLossFromEquityMethodInvestments
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Investment in joint venture at December 31, 2013 46,453us-gaap_EquityMethodInvestments
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21,123us-gaap_EquityMethodInvestments
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Equity Method Investee | OTTP | A-330-200        
Schedule of Equity Method Investments [Line Items]        
Number of Aircraft, Purchased       2ayr_NumberofAircraftPurchased
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Equity Method Investee | OTTP | B-777-300 [Member]        
Schedule of Equity Method Investments [Line Items]        
Number of Aircraft, Purchased       2ayr_NumberofAircraftPurchased
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Equity Method Investee | OTTP | Embraer E195 [Member]        
Schedule of Equity Method Investments [Line Items]        
Number of Aircraft, Purchased       1ayr_NumberofAircraftPurchased
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Maintenance Payments | Equity Method Investee | OTTP        
Schedule of Equity Method Investments [Line Items]        
Customer Advances and Deposits 3,576us-gaap_CustomerAdvancesAndDeposits
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security deposit [Member] | Equity Method Investee | OTTP        
Schedule of Equity Method Investments [Line Items]        
Customer Advances and Deposits $ 5,100us-gaap_CustomerAdvancesAndDeposits
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