Segment Information (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segments	Jun. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments (in segments)			2
Interest expense	$ 3,481	$ 3,554	$ 7,304	$ (6,686)
ACMI Services [Member]
Segment Reporting Information [Line Items]
Interest expense	100	100	200	300
CAM [Member]
Segment Reporting Information [Line Items]
Interest expense	$ 3,000	$ 3,300	$ 6,300	$ 5,900