Commitments and Contingencies (Commitments) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended		1 Months Ended		1 Months Ended				1 Months Ended
	Dec. 31, 2012 Boeing 757 [Member] aircrafts	Dec. 31, 2012 Boeing 757 [Member] aircrafts	Aug. 31, 2010 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] Capital Addition Purchase Commitments [Member]	Dec. 31, 2012 M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] Capital Addition Purchase Commitments [Member] aircrafts	Oct. 31, 2010 Precision Conversions, LLC [Member] Boeing 757 [Member] Capital Addition Purchase Commitments [Member] CargoPalletPositions passengers	Dec. 31, 2012 Precision Conversions, LLC [Member] Boeing 757 [Member] Capital Addition Purchase Commitments [Member]	Aug. 31, 2010 Maximum [Member] M&B Conversions Limited and Israel Areospace Industries Ltd. [Member] Boeing 767-300 [Member] Capital Addition Purchase Commitments [Member] aircrafts	Dec. 31, 2012 Completed Modification Process for Standard Freighter Configuration [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] Capital Addition Purchase Commitments [Member] aircrafts	Dec. 31, 2012 In Freighter Conversion Process [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] Capital Addition Purchase Commitments [Member] aircrafts	Dec. 31, 2012 In Combi Conversion Process [Member] Precision Conversions, LLC [Member] Boeing 757 [Member] Capital Addition Purchase Commitments [Member] aircrafts	Jan. 31, 2013 Subsequent Event [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)				5				1	1	1
Number of in progress aircraft conversions (in aircrafts)				1
Number of not started aircraft conversions (in aircrafts)				1
Agreement cancellation fee				$ 2.0		$ 5.0
Number of full cargo pallet positions (in cargo pallet positions)					10
Number of passenger seats (in passengers)					52
Number of aircrafts purchased	3	1									2