Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fair Value Adjustment of Warrants	$ (110,400)	$ (29,000)	$ 7,500	$ (20,700)
REVENUES	377,794	334,576	767,071	682,759
Net earnings from continuing operations	(105,162)	(26,632)	28,571	(3,998)
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	$ 236	$ 31	$ 4,008	$ 62
Weighted average shares:
Basic (in shares)	59,130	58,909	59,085	58,874
Diluted (in shares)	59,130	58,909	68,104	58,874
Earnings (loss) per share from continuing operations
Basic (in dollars per share)	$ (1.78)	$ (0.45)	$ 0.48	$ (0.07)
Diluted (in dollars per share)	$ (1.78)	$ (0.45)	$ 0.14	$ (0.07)
ACMI Services [Member]
REVENUES	$ 287,604	$ 254,938	$ 571,769	$ 512,894