Consolidated Statements of Stockholders' Equity (USD $) In Thousands		Total	Paid-In Capital [Member]	Retained Earnings / (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Class A [Member]	Common Class A [Member] Treasury Stock [Member]	Common Class B [Member]
Balance at December 31, 2010 at Dec. 31, 2010		$ 464,695	$ 666,961	$ 53,427	$ (18,683)	$ 557	$ (237,688)	$ 121
Beginning balance, shares at Dec. 31, 2010						55,739	(14,981)	12,029
Shares awarded under stock compensation plans		645	641			4
Shares awarded under stock compensation plans, shares						350
Purchases of treasury stock		(10,987)					(10,987)
Purchases of treasury stock, shares							(797)
Income tax benefit associated with stock compensation plans		1,772	1,772
Derecognition of equity component of 5.0% Convertible Notes (1), net of tax expense/benefit of $627 and $662 in 2011 and 2012 respectively	[1]	(5,230)	(5,230)
Fair value of interest rate swap agreements, net of tax expense/benefit of $1,527, $1,035 and $6,514 in 2011, 2012 and 2013 respectively		(2,492)			(2,492)
Change in pension actuarial loss, net of tax benefit of $193, $98 and expense $460 in 2011, 2012 and 2013 respectively		(315)			(315)
Stock-based compensation expense		438	438
Restricted stock amortization		3,260	3,260
Other			(3)			3
Other(2), shares						289
Net income (loss)		76,254		76,254
Dividends ($0.10 per share)		(5,298)		(5,298)
Ending balance at Dec. 31, 2011		522,742	667,839	124,383	(21,490)	564	(248,675)	121
Ending balance, shares at Dec. 31, 2011						56,378	(15,778)	12,029
Shares awarded under stock compensation plans		2,333	2,327			6
Shares awarded under stock compensation plans, shares						608
Issuance of common stock		67,536	67,495			41
Issuance of common stock, shares						4,075
Purchases of treasury stock		(82,924)					(82,924)
Purchases of treasury stock, shares							(4,364)
Income tax benefit associated with stock compensation plans		3,207	3,207
Derecognition of equity component of 5.0% Convertible Notes (1), net of tax expense/benefit of $627 and $662 in 2011 and 2012 respectively	[1]	(76,701)	(76,701)
Fair value of interest rate swap agreements, net of tax expense/benefit of $1,527, $1,035 and $6,514 in 2011, 2012 and 2013 respectively		1,687			1,687
Change in pension actuarial loss, net of tax benefit of $193, $98 and expense $460 in 2011, 2012 and 2013 respectively		(160)			(160)
Stock-based compensation expense		122	122
Restricted stock amortization		5,038	5,038
Other			(3)			3
Other(2), shares						291
Net income (loss)		89,101		89,101
Dividends ($0.10 per share)		(5,436)		(5,436)
Ending balance at Dec. 31, 2012		526,545	669,324	208,048	(19,963)	614	(331,599)	121
Ending balance, shares at Dec. 31, 2012						61,352	(20,142)	12,029
Shares awarded under stock compensation plans		2,171	2,169			2
Shares awarded under stock compensation plans, shares						209
Purchases of treasury stock		(17,067)					(17,067)
Purchases of treasury stock, shares							(758)
Income tax benefit associated with stock compensation plans		856	856
Fair value of interest rate swap agreements, net of tax expense/benefit of $1,527, $1,035 and $6,514 in 2011, 2012 and 2013 respectively		10,629			10,629
Change in pension actuarial loss, net of tax benefit of $193, $98 and expense $460 in 2011, 2012 and 2013 respectively		752			752
Restricted stock amortization		7,208	7,208
Other	[2]	6,225	6,225
Other(2), shares						23
Net income (loss)		81,618		81,618
Dividends ($0.10 per share)		(5,298)		(5,298)
Ending balance at Dec. 31, 2013		$ 613,639	$ 685,782	$ 284,368	$ (8,582)	$ 616	$ (348,666)	$ 121
Ending balance, shares at Dec. 31, 2013						61,584	(20,900)	12,029

[1] 5.0% Convertible Senior Notes due 2029 which were extinguished during the third quarter ended September 30, 2012 (the "5.0% Convertible Notes").

[2] Paid-in capital amount represents a tax benefit related to the 5.0% Convertible Notes.