Condensed Consolidated Statement of Changes in Stockholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]
Beginning Balance at Dec. 31, 2016	$ 461,215	$ 919	$ 621,343	$ 7,518	$ (13,694)	$ (154,871)
Beginning Balance, shares at Dec. 31, 2016	91,861,054	91,861,054
Equity-based compensation	$ 4,114		4,114
Unrealized gain on derivatives, net of tax	2,404				2,404
Vesting of restricted shares		$ 1	(1)
Vesting of restricted shares, shares		127,396
Shares withheld for tax withholdings	(749)	$ (1)	(748)
Shares withheld for tax withholdings, shares		(40,038)
Adjustments to previous dividend declarations	(16)		(37)	21
Net loss	(61,129)			(61,129)
Ending Balance at Mar. 31, 2017	$ 405,839	$ 919	$ 624,671	$ (53,590)	$ (11,290)	$ (154,871)
Ending Balance, shares at Mar. 31, 2017	91,948,412	91,948,412