Consolidated Statement of Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulative Other Comprehensive Income (Loss) [Member]	Retained Income (Deficit) [Member]
Balance at Dec. 31, 2009		$ 21,474	$ 278,894	$ 6,777	$ (49,147)
Balance, shares at Dec. 31, 2009		35,286,129
Stockholders' Equity [Roll Forward]
Net income (loss)	(42,834)				(42,834)
Restricted shares issued		10,750
Sales under option plans, shares	5,650	5,650
Sales under option plans		4	20
Dividend reinvestment plan, shares		13,203
Dividend reinvestment plan		8	136
Stock based compensation			2,326
Foreign currency translation adjustment	3,413			3,413
Declared dividends					(9,240)
Pension liability, net of tax	(26)			(26)
Balance at Dec. 31, 2010		21,486	281,376	10,164	(101,221)
Balance, shares at Dec. 31, 2010		35,315,732
Stockholders' Equity [Roll Forward]
Net income (loss)	24,505				24,505
Sales under option plans, shares	59,031	59,031
Sales under option plans		36	597
Dividend reinvestment plan, shares		11,610
Dividend reinvestment plan		7	111
Restricted stock and stock option grants, net (shares)		28,750
Restricted stock and stock option grants, net			2,595
Foreign currency translation adjustment	(2,240)			(2,240)
Purchase for treasury, shares		(2,000,000)
Purchases for treasury		(1,220)	(19,726)
Stock contribution, shares		5,365
Stock contribution		3	47
Declared dividends					(9,750)
Pension liability, net of tax	(630)			(630)
Balance at Dec. 31, 2011	206,140	20,312	265,000	7,294	(86,466)
Balance, shares at Dec. 31, 2011		33,420,488
Stockholders' Equity [Roll Forward]
Net income (loss)	29,962				29,962
Sales under option plans, shares	288,794	278,659
Sales under option plans		145	2,870
Dividend reinvestment plan, shares		7,112
Dividend reinvestment plan		5	102
Restricted stock vested, shares		40,500
Restricted stock award		24	(24)
Restricted stock and stock option grants, net (shares)		11,484
Restricted stock and stock option grants, net			2,708
Cancellations and terminations of share grants			(253)
Foreign currency translation adjustment	2,791			2,791
Purchase for treasury, shares		(281,797)
Purchases for treasury		(172)	(4,032)
Stock contribution, shares		3,743
Stock contribution		2	48
Declared dividends					(10,852)
Pension liability, net of tax	558			558
Balance at Dec. 31, 2012	$ 230,022	$ 20,316	$ 266,419	$ 10,643	$ (67,356)
Balance, shares at Dec. 31, 2012		33,480,189