Segment Information (Segment Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
REVENUES	$ 147,025us-gaap_Revenues	$ 143,593us-gaap_Revenues
Customer revenues	147,025us-gaap_Revenues	143,593us-gaap_Revenues
Depreciation and amortization expense	28,993us-gaap_DepreciationAndAmortization	24,979us-gaap_DepreciationAndAmortization
Net unallocated interest expense	(3,065)us-gaap_InterestExpense	(3,823)us-gaap_InterestExpense
Net gain (loss) on derivative instruments	(13)	299
Pre-tax earnings from continuing operations	14,473	10,331
Assets	1,028,391us-gaap_Assets		1,031,629us-gaap_Assets
Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	147,025	143,593
Customer revenues	147,025	143,593
CAM [Member]
Segment Reporting Information [Line Items]
REVENUES	42,854	40,635
Customer revenues	42,854	40,635
Depreciation and amortization expense	20,910	18,345
Segment earnings (loss)	14,438	14,440
Net unallocated interest expense	(2,600)	(3,300)
Assets	796,980		801,195
CAM [Member] \| Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	19,881	18,413
Customer revenues	19,881	18,413
ACMI Services [Member]
Segment Reporting Information [Line Items]
REVENUES	105,468	108,596
Customer revenues	105,468	108,596
Depreciation and amortization expense	8,091	6,835
Segment earnings (loss)	(2,571)	(7,046)
Assets	141,878		135,109
ACMI Services [Member] \| Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	105,468	108,596
Customer revenues	105,468	108,596
All other [Member]
Segment Reporting Information [Line Items]
REVENUES	35,606	26,808
Customer revenues	35,606	26,808
Depreciation and amortization expense	(8)	(201)
Segment earnings (loss)	3,076	3,017
Assets	89,533		95,325
All other [Member] \| Customer Revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	21,676	16,584
Customer revenues	21,676	16,584
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net unallocated interest expense	(457)	(379)
Eliminate inter-segment revenues [Member]
Segment Reporting Information [Line Items]
REVENUES	(36,903)	(32,446)
Customer revenues	$ (36,903)	$ (32,446)

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