Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 29, 2020	Dec. 31, 2019
Accumulated depreciation on flight equipment held for lease	$ 1,542,938	$ 1,501,664
Financing Receivable, Allowance for Credit Loss, Current	$ 6,558	$ 0
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	250,000,000	250,000,000
Common shares, shares issued	75,076,794	75,122,129
Common shares, shares outstanding	75,076,794	75,122,129
Preference shares, par value	$ 0.01	$ 0.01
Preference shares, shares authorized	50,000,000	50,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0