Segment Information Segment Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
REVENUES	$ 142,305	$ 138,443	$ 437,683	$ 431,654
Customer revenues	142,305	138,443	437,683	431,654
Depreciation and amortization expense	30,754	26,307	91,147	78,428
Net unallocated interest expense	(2,684)	(3,309)	(8,588)	(10,613)
Unrealized Gain (Loss) on Derivatives	96	639	347	969
Pre-tax earnings from continuing operations	10,347	15,640	42,063	40,662
Assets	1,033,750		1,033,750		$ 1,031,629
Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	142,305	138,443	437,683	431,654
Customer revenues	142,305	138,443	437,683	431,654
CAM [Member]
Segment Reporting Information [Line Items]
REVENUES	42,574	40,226	131,060	121,451
Customer revenues	42,574	40,226	131,060	121,451
Depreciation and amortization expense	21,305	19,740	64,571	58,413
Segment earnings (loss)	13,482	13,574	42,361	38,681
Net unallocated interest expense	(2,300)	(2,800)	(7,200)	(9,100)
Assets	796,333		796,333		801,195
CAM [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	23,671	20,227	68,212	56,480
Customer revenues	23,671	20,227	68,212	56,480
ACMI Services [Member]
Segment Reporting Information [Line Items]
REVENUES	99,918	102,853	309,278	322,753
Customer revenues	99,918	102,853	309,278	322,753
Depreciation and amortization expense	9,461	6,543	26,579	20,569
Segment earnings (loss)	(4,914)	(126)	(6,359)	(6,863)
Assets	139,940		139,940		135,109
ACMI Services [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	98,820	102,853	308,180	322,753
Customer revenues	98,820	102,853	308,180	322,753
All other [Member]
Segment Reporting Information [Line Items]
REVENUES	38,398	42,055	106,183	105,356
Customer revenues	38,398	42,055	106,183	105,356
Depreciation and amortization expense	(12)	24	(3)	(554)
Segment earnings (loss)	2,077	2,010	6,993	9,135
Assets	97,477		97,477		$ 95,325
All other [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	19,814	15,363	61,291	52,421
Customer revenues	19,814	15,363	61,291	52,421
Eliminate inter-segment revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	(38,585)	(46,691)	(108,838)	(117,906)
Customer revenues	(38,585)	(46,691)	(108,838)	(117,906)
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net unallocated interest expense	$ (394)	$ (457)	$ (1,279)	$ (1,260)