CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained (Deficit)/ Earnings	Accumulated Other Comprehensive Loss	Restricted Stock
Beginning balance at Dec. 31, 2015						$ (235,609)
Net income	$ (105,381)
Other comprehensive income, net of tax	(17,759)
Ending Balance at Sep. 30, 2016						(253,368)
Beginning balance at Jun. 30, 2016						(251,887)
Net income	(217,229)
Other comprehensive income, net of tax	(1,481)
Ending Balance at Sep. 30, 2016						(253,368)
Beginning balance at Dec. 31, 2016	(183,087)	$ 1	$ (9,990)	$ 67,422	$ (30,648)	(254,905)	$ 45,033
Beginning Balance (in shares) at Dec. 31, 2016		83,635					670
Net income	123,865				123,865
Other comprehensive income, net of tax	6,544					6,544
Repurchases of common stock	(16,078)		(16,078)
Repurchases of common stock (in shares)		(876)
Restricted stock activity	5,140						$ 5,140
Restricted stock activity (in shares)		95					148
Ending Balance at Sep. 30, 2017	(63,616)	$ 1	(26,068)	67,422	93,217	(248,361)	$ 50,173
Ending Balance (in shares) at Sep. 30, 2017		82,854					818
Beginning balance at Jun. 30, 2017						(247,483)
Net income	48,833
Other comprehensive income, net of tax	(878)
Ending Balance at Sep. 30, 2017	$ (63,616)	$ 1	$ (26,068)	$ 67,422	$ 93,217	$ (248,361)	$ 50,173
Ending Balance (in shares) at Sep. 30, 2017		82,854					818