Condensed Consolidated Statements of Changes in Stockholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	(Accumulated Deficit) Retained Earnings [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	90,320,374
Equity-based compensation	$ 32,051		32,051
Unrealized gain (loss) on derivatives, net of tax	(13,721)				(13,721)
Vesting of restricted shares		$ 15	(15)
Vesting of restricted shares, shares		1,533,015
Shares withheld for tax withholdings	(1,324)		(1,324)
Shares withheld for tax withholdings, shares		(65,625)
Exercise of stock options	$ 82		82
Exercise of stock options, shares	4,331	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	(53,799)		(36,010)	(17,789)
Net loss	(66,281)			(66,281)
Ending Balance at Jun. 30, 2016	$ 397,728	$ 918	$ 616,149	$ (37,610)	$ (26,858)	$ (154,871)
Ending Balance, shares at Jun. 30, 2016	91,792,095	91,792,095