Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Capital In Excess Of Par [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balances at Dec. 31, 2008	$ 10,922	$ 11,140	$ (2,881)	$ 143,427	$ 162,608
Balances, shares at Dec. 31, 2008	8,737,281
Net income (loss)				(9,330)	(9,330)
Other comprehensive income (loss)			1,217		1,217
Stock-based compensation		1,015			1,015
Issuance of common stock under awards, rights and options and related tax benefit	31	(69)			(38)
Issuance of common stock under awards, rights and options and related tax benefit, shares	25,102
Balances at Dec. 31, 2009	10,953	12,086	(1,664)	134,097	155,472
Balances, shares at Dec. 31, 2009	8,762,383
Cumulative adjustment due to consolidation of equity investee, net of taxes				(602)	(602)
Net income (loss)				9,746	9,746
Other comprehensive income (loss)			(612)		(612)
Stock-based compensation		1,342			1,342
Issuance of common stock under awards, rights and options and related tax benefit	35	(155)			(120)
Issuance of common stock under awards, rights and options and related tax benefit, shares	28,016
Balances at Dec. 31, 2010	10,988	13,273	(2,276)	143,241	165,226
Balances, shares at Dec. 31, 2010	8,790,399
Net income (loss)				36,435	36,435
Other comprehensive income (loss)			(1,074)		(1,074)
Stock-based compensation		1,580			1,580
Issuance of common stock under awards, rights and options and related tax benefit	52	(174)			(122)
Issuance of common stock under awards, rights and options and related tax benefit, shares	41,778
Balances at Dec. 31, 2011	$ 11,040	$ 14,679	$ (3,350)	$ 179,676	$ 202,045
Balances, shares at Dec. 31, 2011	8,832,177