Quarterly Results (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value Adjustment of Warrants	$ 33,500	$ (110,400)	$ 40,400	$ 7,500
Asset Impairment Charges	0	39,075	0	39,075
Income Tax (Expense) Benefit, Continuing Operations, Government Grants	38,274	9,821	66,304	9,821
REVENUES	409,872	377,794	785,960	767,071
Net earnings from continuing operations	79,869	(105,162)	122,159	28,571
EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES	65	236	65	4,008
ACMI Services [Member]
REVENUES	$ 273,301	$ 287,604	$ 520,432	$ 571,769