Segment Information (Entity-Wide Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Interest Expense	$ 17,390	$ 5,362
Customer revenues	348,183	203,040
Customer Revenues [Member]
Segment Reporting Information [Line Items]
Customer revenues	348,183	203,040
CAM [Member]
Segment Reporting Information [Line Items]
Interest Expense	10,000	4,500
Customer revenues	70,350	52,376
CAM [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
Customer revenues		35,887
ACMI Services [Member]
Segment Reporting Information [Line Items]
Interest Expense	6,500	500
Customer revenues	257,956	119,374
ACMI Services [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
Customer revenues		119,374
All other [Member]
Segment Reporting Information [Line Items]
Customer revenues	67,362	71,898
All other [Member] | Customer Revenues [Member]
Segment Reporting Information [Line Items]
Customer revenues	$ 48,621	$ 47,779