Property and Equipment (Narrative) (Details) (USD $)	12 Months Ended											3 Months Ended			12 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Aircraft and flight equipment [Member]	Dec. 31, 2012 Aircraft and flight equipment [Member]	Dec. 31, 2011 Aircraft and flight equipment [Member]	Dec. 31, 2013 CAM [Member]	Dec. 31, 2012 CAM [Member]	Dec. 31, 2011 CAM [Member]	Dec. 31, 2013 CAM [Member] Aircraft and flight equipment [Member]	Dec. 31, 2012 CAM [Member] Aircraft and flight equipment [Member]	Sep. 30, 2011 Boeing 727 and DC-8 aircraft and flight equipment [Member] Aircraft and flight equipment [Member]	Dec. 31, 2013 Boeing 727 and DC-8 aircraft and flight equipment [Member] Aircraft and flight equipment [Member]	Dec. 31, 2012 Boeing 727 and DC-8 aircraft and flight equipment [Member] Aircraft and flight equipment [Member]	Dec. 31, 2011 Boeing 727 and DC-8 aircraft and flight equipment [Member] CAM [Member] Aircraft and flight equipment [Member]	Dec. 31, 2011 BAX/Schenker [Member]
Property, Plant and Equipment [Line Items]
Leased aircraft, carrying value										$ 250,900,000	$ 273,400,000
Operating Leases, Future Minimum Payments Receivable [Abstract]
Minimum future lease payments, Due within next 12 months				54,800,000
Minimum future lease payments, Due within next 2 years				54,800,000
Minimum future lease payments, Due within next 3 years				48,200,000
Minimum future lease payments, Due within next 4 years				23,100,000
Minimum future lease payments, Due within next 5 years				4,200,000
Impairment of aircraft	0	0	22,065,000				0	0	6,761,000			22,100,000			(6,800,000)
Aircraft and engines held for sale	2,995,000	3,360,000											3,000,000	3,400,000
Proceeds from sale of flight equipment				1,500,000	5,800,000	11,100,000
Proceeds from maintenance cost reimbursement																$ 10,700,000