Commitments and Contingencies - Commitments (Details) (Capital Addition Purchase Commitments [Member], USD $) In Millions, unless otherwise specified	1 Months Ended		1 Months Ended		1 Months Ended
	Aug. 31, 2010 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member]	Sep. 30, 2012 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] aircrafts	Oct. 31, 2010 Precision Conversions, LLC [Member] Boeing 757 [Member] CargoPalletPositions passengers	Sep. 30, 2012 Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts	Aug. 31, 2010 Maximum [Member] M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] aircrafts	Sep. 30, 2012 Freighter Conversion [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts	Sep. 30, 2012 Combi Conversion [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] aircrafts
Long-term Purchase Commitment [Line Items]
Number of aircrafts to be converted					10
Agreement time period	10 years
Number of completed aircraft conversions (in aircrafts)		4		1
Number of in progress aircraft conversions (in aircrafts)		2
Number of not started aircraft conversions (in aircrafts)		1				1	1
Agreement cancellation fee		$ 13		$ 10
Number of full cargo pallet positions (in cargo pallet positions)			10
Number of passenger seats (in passengers)			52