Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value Adjustment of Warrants	$ 93,400	$ 17,300	$ 72,700	$ 25,000
REVENUES	366,073	204,919	1,048,832	611,566
Net earnings from continuing operations	105,085	32,933	101,087	73,079
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	$ 243	$ 170	$ 305	$ 536
Weighted average shares:
Basic (in shares)	58,919	58,739	58,889	58,773
Diluted (in shares)	68,718	68,323	69,382	68,629
Earnings (loss) per share from continuing operations
Basic (in dollars per share)	$ 1.78	$ 0.56	$ 1.72	$ 1.24
Diluted (in dollars per share)	$ 0.19	$ 0.24	$ 0.43	$ 0.71
ACMI Services [Member]
REVENUES	$ 272,188	$ 116,224	$ 785,082	$ 355,204