Property and Equipment (Narrative) (Details) - Flight Equipment [Member] - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
CAM [Member]
Property, Plant and Equipment [Line Items]
Leased aircraft, carrying value	$ 338.0	$ 289.5
Boeing 727 and DC-8 aircraft and flight equipment [Member]
Operating Leases, Future Minimum Payments Receivable [Abstract]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	$ 0.4	$ 0.7