Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock, at Cost [Member]
Beginning Balance at Dec. 31, 2018	$ 265,194	$ 934	$ 663,834	$ (148,955)	$ 2,284	$ (252,903)
Beginning Balance, shares at Dec. 31, 2018		93,400,929
Equity-based compensation	3,198		3,198
Unrealized income (loss) on derivatives, net of tax	(2,064)				(2,064)
Vesting of restricted shares		$ 4	(4)
Vesting of restricted shares, shares		440,646
Shares withheld for tax withholdings	(3,606)	$ (1)	(3,605)
Shares withheld for tax withholdings, shares		(132,886)
Exercise of stock options	715		715
Exercise of stock options, shares		39,928
Adjustments to previous dividend declarations	3		3
Net income (Loss)	(37,020)			(37,020)
Ending Balance at Mar. 31, 2019	226,420	$ 937	664,141	(185,975)	220	(252,903)
Ending Balance, shares at Mar. 31, 2019		93,748,617
Beginning Balance at Dec. 31, 2019	$ 210,892	$ 940	673,893	(59,479)	(1,559)	(402,903)
Beginning Balance, shares at Dec. 31, 2019	94,044,203	94,044,203
Equity-based compensation	$ (3,601)		(3,601)
Unrealized income (loss) on derivatives, net of tax	704				704
Vesting of restricted shares		$ 4	(4)
Vesting of restricted shares, shares		410,807
Shares withheld for tax withholdings	(3,160)	$ (1)	(3,159)
Shares withheld for tax withholdings, shares		(121,089)
Exercise of stock options	203		203
Exercise of stock options, shares		11,096
Adjustments to previous dividend declarations	1		1
Repurchase of treasury shares	(12,406)					(12,406)
Net income (Loss)	(56,519)			(56,519)
Ending Balance at Mar. 31, 2020	$ 136,114	$ 943	$ 667,333	$ (115,998)	$ (855)	$ (415,309)
Ending Balance, shares at Mar. 31, 2020	94,345,017	94,345,017