Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock, at Cost [Member]
Beginning Balance at Dec. 31, 2015	$ 504,120	$ 903	$ 624,765	$ 46,460	$ (13,137)	$ (154,871)
Beginning Balance, shares at Dec. 31, 2015		90,320,374
Equity-based compensation	37,515		37,515
Unrealized gain (loss) on derivatives, net of tax	(557)				(557)
Vesting of restricted shares		$ 16	(16)
Vesting of restricted shares, shares		1,625,529
Shares withheld for tax withholdings	(1,629)		(1,629)
Shares withheld for tax withholdings, shares		(89,180)
Exercise of stock options	82		82
Exercise of stock options, shares		4,331
Accumulated cash dividends related to performance shares which vested during the period	(3,400)		(3,400)
Cash dividends declared to stockholders, net of forfeitures	(62,385)		(35,974)	(26,411)
Net (loss) income	(12,531)			(12,531)
Ending Balance at Dec. 31, 2016	461,215	$ 919	621,343	7,518	(13,694)	(154,871)
Ending Balance, shares at Dec. 31, 2016		91,861,054
Equity-based compensation	23,203		23,203
Unrealized gain (loss) on derivatives, net of tax	8,618				8,618
Vesting of restricted shares		$ 9	(9)
Vesting of restricted shares, shares		905,052
Shares withheld for tax withholdings	(2,088)	$ (2)	(2,086)
Shares withheld for tax withholdings, shares		(129,293)
Exercise of stock options	11		11
Exercise of stock options, shares		590
Accumulated cash dividends related to performance shares which vested during the period	(1,270)		(1,270)
Adjustments to previous dividend declarations	163		132	31
Net (loss) income	(202,386)			(202,386)
Ending Balance at Dec. 31, 2017	$ 287,466	$ 926	641,324	(194,837)	(5,076)	(154,871)
Ending Balance, shares at Dec. 31, 2017	92,637,403	92,637,403
Impact of adoption of ASU 2018-02				1,094	(1,094)
Equity-based compensation	$ 22,152		22,152
Unrealized gain (loss) on derivatives, net of tax	8,454				8,454
Vesting of restricted shares		$ 7	(7)
Vesting of restricted shares, shares		725,646
Shares withheld for tax withholdings	(3,977)	$ (1)	(3,976)
Shares withheld for tax withholdings, shares		(197,097)
Exercise of stock options	$ 4,282	$ 2	4,280
Exercise of stock options, shares	234,977	234,977
Adjustments to previous dividend declarations	$ 61		61
Repurchase of shares of treasury stock, at cost	(98,032)					(98,032)
Net (loss) income	44,788			44,788
Ending Balance at Dec. 31, 2018	$ 265,194	$ 934	$ 663,834	$ (148,955)	$ 2,284	$ (252,903)
Ending Balance, shares at Dec. 31, 2018	93,400,929	93,400,929