Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		0 Months Ended	3 Months Ended			0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2013 item	Dec. 31, 2012	May 09, 2013 Aircrafts item	Mar. 31, 2013 Airbus A320/321-200 item	Mar. 31, 2013 Airbus A320/321 NEO item	Mar. 31, 2013 Airbus A330-200/300 item	May 09, 2013 Airbus A350-900/1000 item	Mar. 31, 2013 Airbus A350-900/1000 item	Mar. 31, 2013 Boeing B737-800 item	May 09, 2013 Boeing 737-8/9 MAX item	Mar. 31, 2013 Boeing 737-8/9 MAX item	Mar. 31, 2013 Boeing B777-300ER item	Mar. 31, 2013 Boeing 787-9 item	Mar. 31, 2013 ATR 72-600 item
Aircraft Acquisition
Number of new aircraft			323
Commitments to acquire aircraft
2013	29			9		2			12					6
2014	36			13					13			6		4
2015	32			6					17			8		1
2016	22				3				18			1
2017	24				12				11				1
Thereafter	180				35			30	4		100		11
Total	323			28	50	2		30	75		100	15	12	11
Number of aircraft subject to reconfirmation							5			20
Commitments for the acquisition of the aircraft and other equipment
2013	$ 1,387,197
2014	2,225,998
2015	2,010,361
2016	1,312,235
2017	1,559,400
Thereafter	14,449,731
Total	22,944,922
Non-refundable deposits on the aircraft for which the entity have commitments to purchase	$ 776,472	$ 564,718