Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fair Value Adjustment of Warrants	$ (67,300)	$ (3,664)	$ 0	$ (3,405)
REVENUES	253,211	176,549	491,128	353,934
Net earnings (loss) from continuing operations	(53,918)	11,528	(44,122)	19,699
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	$ 192	$ 47	$ 384	$ 94
Weighted average shares:
Basic (in shares)	59,035	63,267	59,084	63,452
Diluted (in shares)	59,035	66,763	59,084	65,910
Earnings per share from continuing operations
Basic (in dollars per share)	$ (0.91)	$ 0.18	$ (0.75)	$ 0.31
Diluted (in dollars per share)	$ (0.91)	$ 0.12	$ (0.75)	$ 0.25
ACMI Services [Member]
REVENUES	$ 144,499	$ 114,145	$ 289,448	$ 229,101