Consolidated Statements Of Stockholders' Equity (Deficit) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Retained Earnings [Member]	Common Stock Held In Treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2008	$ 16,169	$ (12,697)	$ (2,964)	$ (15,003)	$ (14,495)
Balance, shares at Dec. 31, 2008	26,410
Net income		42,160			42,160
Other comprehensive income (loss)
Foreign currency translation				(42)	(42)
Retirement and post-retirement liabilities				6,694	6,694
Income tax benefit				(2,631)	(2,631)
Dividends declared		(10,597)			(10,597)
Common stock issued from treasury stock		1,188	89		1,277
Common stock issued from treasury stock, shares	178
Non-cash share-based compensation		10,031			10,031
Excess (reduced) tax benefits from share-based awards		(1,822)			(1,822)
Balance at Dec. 31, 2009	16,169	28,263	(2,875)	(10,982)	30,575
Balance, shares at Dec. 31, 2009	26,588
Net income		44,478			44,478
Other comprehensive income (loss)
Foreign currency translation				61	61
Retirement and post-retirement liabilities				1,763	1,763
Income tax benefit				(902)	(902)
Dividends declared		(10,711)			(10,711)
Common stock issued from treasury stock		5,650	233		5,883
Common stock issued from treasury stock, shares	467
Non-cash share-based compensation		6,478			6,478
Excess (reduced) tax benefits from share-based awards		26			26
Balance at Dec. 31, 2010	16,169	74,184	(2,642)	(10,060)	77,651
Balance, shares at Dec. 31, 2010	27,055
Net income		53,291			53,291
Other comprehensive income (loss)
Foreign currency translation				(1,688)	(1,688)
Retirement and post-retirement liabilities				(6,327)	(6,327)
Income tax benefit				2,474	2,474
Dividends declared		(10,879)			(10,879)
Common stock issued from treasury stock		3,229	118		3,347
Common stock issued from treasury stock, shares	235
Non-cash share-based compensation		8,020			8,020
Excess (reduced) tax benefits from share-based awards		927			927
Balance at Dec. 31, 2011	$ 16,169	$ 128,772	$ (2,524)	$ (15,601)	$ 126,816
Balance, shares at Dec. 31, 2011	27,290