Consolidated Statements of Shareholders' Deficit (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Retained Earnings [Member]
Beginning balance at Dec. 31, 2010	$ (49,396)	$ 596	$ 92,774	$ (7,192)	$ (872,306)	$ 736,732
Beginning balance, shares at Dec. 31, 2010		59,583,770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	111,061					111,061
Other comprehensive income	391			391
Exercise of stock options (shares)	175,386	175,386
Exercise of stock options	3,622	2	2,913		707
Issuance of restricted stock and PVRSU (shares)		247,298
Issuance of restricted stock and PVRSU	0	2	(9,604)		9,602
Cancellation of restricted stock (shares)		(68,580)
Cancellation of restricted stock	0	0	2,300		(2,300)
Share based compensation on equity awards	11,324		11,324
Change in excess tax benefits on equity awards	2,958		2,958
Dividends declared	(43,506)					(43,506)
Treasury purchases (shares)		(1,681,324)
Treasury purchases	(53,617)	(17)			(53,600)
Issuance of treasury shares (shares)		21,096
Issuance of treasury shares	739				739
Other	203				203
Ending balance at Dec. 31, 2011	(16,221)	583	102,665	(6,801)	(916,955)	804,287
Ending balance, shares at Dec. 31, 2011		58,277,646
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	121,613					121,613
Other comprehensive income	2,585			2,585
Exercise of stock options (shares)	266,754	266,754
Exercise of stock options	7,090	3	3,515		3,572
Issuance of restricted stock and PVRSU (shares)		266,159
Issuance of restricted stock and PVRSU	0	2	(9,517)		9,515
Cancellation of restricted stock (shares)		(26,824)
Cancellation of restricted stock	0	0	967		(967)
Share based compensation on equity awards	11,377		11,377
Change in excess tax benefits on equity awards	1,239		1,239
Dividends declared	(643,374)					(643,374)
Treasury purchases (shares)		(612,676)
Treasury purchases	(22,586)	(6)			(22,580)
Other	(361)				(361)
Ending balance at Dec. 31, 2012	(538,638)	582	110,246	(4,216)	(927,776)	282,526
Ending balance, shares at Dec. 31, 2012	58,171,059	58,171,059
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	113,709					113,709
Other comprehensive income	(2,001)			(2,001)
Exercise of stock options (shares)	347,180	347,180
Exercise of stock options	8,864	2	3,486		5,376
Issuance of restricted stock and PVRSU (shares)		265,056
Issuance of restricted stock and PVRSU	0	3	(9,798)		9,795
Cancellation of restricted stock (shares)		(40,552)
Cancellation of restricted stock	0	0	1,453		(1,453)
Share based compensation on equity awards	11,417		11,417
Change in excess tax benefits on equity awards	964		964
Dividends declared	(43,212)					(43,212)
Treasury purchases (shares)		(103,880)
Treasury purchases	(3,965)	(1)			(3,964)
Other	(9)				(9)
Ending balance at Dec. 31, 2013	$ (452,871)	$ 586	$ 117,768	$ (6,217)	$ (918,031)	$ 353,023
Ending balance, shares at Dec. 31, 2013	58,638,863	58,638,863