Condensed Consolidated Statement of Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2010	$ 718,400	$ 309	$ 474,277	$ (17,363)	$ 293,514	$ (32,337)
Balance, shares at Dec. 31, 2010		30,123,519
Net income	6,537				6,537
Other comprehensive income (loss)	(1,955)					(1,955)
Shares issued for directors' compensation, shares		14,273
Shares issued for restricted stock award plans, shares		50,296
Stock-based compensation expense recognized	3,528		3,528
Treasury stock purchased at cost	(283)			(283)
Treasury stock purchased at cost, shares		(9,965)
Exercise of employee options	116		116
Exercise of employee options, shares	7,337	7,337
Forfeiture of restricted stock awards		(2,000)
Tax benefits from stock-based compensation activity	(32)		(32)
Shares issued for employee stock purchase plan	136		136
Shares issued for employee stock purchase plan, shares		4,501
Balance at Sep. 30, 2011	$ 726,447	$ 309	$ 478,025	$ (17,646)	$ 300,051	$ (34,292)
Balance, shares at Sep. 30, 2011		30,187,961