Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accumulated depreciation on flight equipment held for lease	$ 1,294,063	$ 1,430,325
Borrowings from secured financings	1,396,454us-gaap_SecuredDebt	1,586,835us-gaap_SecuredDebt
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	250,000,000us-gaap_CommonStockSharesAuthorized	250,000,000us-gaap_CommonStockSharesAuthorized
Common shares, shares issued	80,983,249us-gaap_CommonStockSharesIssued	80,806,975us-gaap_CommonStockSharesIssued
Common shares, shares outstanding	80,983,249us-gaap_CommonStockSharesOutstanding	80,806,975us-gaap_CommonStockSharesOutstanding
Preference shares, par value	$ 0.01	$ 0.01
Preference shares, shares authorized	50,000,000us-gaap_PreferredStockSharesAuthorized	50,000,000us-gaap_PreferredStockSharesAuthorized
Preference shares, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preference shares, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Variable Interest Entity, Primary Beneficiary \| ACS Ireland
Borrowings from secured financings	$ 64,183	$ 152,545

Face amount or stated value per share of common stock.

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