CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2018	$ 369,001	$ 41	$ 347,487	$ 49,655	$ (28,182)
Comprehensive income (loss)	20,196			36,271		$ (16,075)
Issuance of Common Stock in connection with Merger	132,838	6	132,832
Share-based compensation Replacement Awards related to Merger and attributable to pre-combination services	9,107		9,107
Exercise of stock options	701	1	700
Tax withholding for share-based compensation	(1,464)		(1,464)
Share-based employee compensation expense	15,266		15,266
Other	(247)		(129)	(118)
Balance at Sep. 30, 2019	545,398	48	503,799	85,808	(28,182)	(16,075)
Balance at Jun. 30, 2019	529,306	47	497,789	71,888	(28,182)	(12,236)
Comprehensive income (loss)	10,081			13,920		(3,839)
Exercise of stock options	330	1	329
Tax withholding for share-based compensation	(328)		(328)
Share-based employee compensation expense	6,009		6,009
Balance at Sep. 30, 2019	545,398	48	503,799	85,808	(28,182)	(16,075)
Balance at Dec. 31, 2019	226,910	48	504,419	(237,284)	(28,182)	(12,091)
Comprehensive income (loss)	(230,140)			(212,013)		(18,127)
Exercise of stock options	719		719
Tax withholding for share-based compensation	(3,293)		(3,293)
Share-based employee compensation expense	8,005		8,005
Other	40			40
Balance at Sep. 30, 2020	2,241	48	509,850	(449,257)	(28,182)	(30,218)
Balance at Jun. 30, 2020	37,721	48	505,760	(406,840)	(28,182)	(33,065)
Comprehensive income (loss)	(39,570)			(42,417)		2,847
Exercise of stock options	118		118
Tax withholding for share-based compensation	(344)		(344)
Share-based employee compensation expense	4,316		4,316
Balance at Sep. 30, 2020	$ 2,241	$ 48	$ 509,850	$ (449,257)	$ (28,182)	$ (30,218)