Segment Information (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 segments	Sep. 30, 2012
Segment Reporting Information [Line Items]
Number of reportable segments (in segments)			2
Interest expense	$ 3,814	$ 3,668	$ 10,500	$ 10,886
ACMI Services [Member]
Segment Reporting Information [Line Items]
Interest expense	100	200	400	700
CAM [Member]
Segment Reporting Information [Line Items]
Interest expense	$ 3,300	$ 3,100	$ 9,200	$ 9,100