Quarterly Results (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value Adjustment of Warrants	$ (9,600)	$ (55,900)	$ 30,800	$ (48,300)
Asset Impairment Charges	0	0	0	39,075
Income Tax (Expense) Benefit, Continuing Operations, Government Grants	30,322	21,726	96,626	31,547
REVENUES	465,955	404,146	1,251,915	1,171,217
Net earnings from continuing operations	62,363	(5,745)	184,522	22,826
EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES	2,309	154	2,374	4,162
ACMI Services [Member]
REVENUES	$ 330,906	$ 300,189	$ 851,338	$ 871,958