Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	AOCI Attributable to Parent	Treasury Stock	Retained Earnings
Beginning balance, (in shares) at Dec. 31, 2013		58,638,863
Beginning balance at Dec. 31, 2013	$ (452,871)	$ 586	$ 117,768	$ (6,217)	$ (918,031)	$ 353,023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	123,160					123,160
Other comprehensive income	(754)			(754)
Share based payment activity (in shares)		550,205
Share based payment activity	23,283	$ 6	9,893		13,384
Dividends declared	(43,784)	$ (43,400)				(43,784)
Treasury purchases (in shares)		(1,510,070)
Treasury purchases	(77,972)	$ (15)			(77,957)
Other (in shares)		(341,278)
Other	137	$ (4)			141
Ending balance, (in shares) at Dec. 31, 2014		57,337,720
Ending balance at Dec. 31, 2014	(428,801)	$ 573	127,661	(6,971)	(982,463)	432,399
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	128,029					128,029
Other comprehensive income	(1,807)			(1,807)
Share based payment activity (in shares)		443,040
Share based payment activity	23,887	$ 0	22,110		1,777
Dividends declared	(45,531)	$ (45,100)				(45,531)
Treasury purchases (in shares)		(1,444,194)
Treasury purchases	(72,873)	$ 0			(72,873)
Other (in shares)		0
Other	$ 1,197	$ 378	124		695
Ending balance, (in shares) at Dec. 31, 2015	56,336,566	56,336,566
Ending balance at Dec. 31, 2015	$ (395,899)	$ 951	149,895	(8,778)	(1,052,864)	514,897
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	139,371					139,371
Other comprehensive income	256			256
Share based payment activity (in shares)		732,735
Share based payment activity	27,557	$ 0	9,150		18,407
Dividends declared	(46,708)	$ (46,700)				(46,708)
Treasury purchases (in shares)		(769,352)
Treasury purchases	$ (35,926)	$ 0	0		(35,926)
Ending balance, (in shares) at Dec. 31, 2016	56,299,949	56,299,949
Ending balance at Dec. 31, 2016	$ (311,349)	$ 951	$ 159,045	$ (8,522)	$ (1,070,383)	$ 607,560