CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data	Total	Common stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Comprehensive income
Balance at Dec. 31, 2010	$ 307,638	$ 883	$ 204,450	$ 111,702	$ (9,397)
Balance (in shares) at Dec. 31, 2010		88,341,546			4,988,538
Comprehensive income:
Net income	22,239			22,239	0	22,239
Total comprehensive income	22,239					22,239
Stock-based compensation cost	3,966		3,966
Exercise of Stock Options	7,763	14	7,749
Exercise of Stock Options (in shares)		1,267,872
Vesting of restricted stock awards and units, net of shares withheld for employee tax	(903)		(903)			(903)
Vesting of restricted stock awards and units, net of shares withheld for employee tax (in shares)		76,752
Excess tax benefit from exercise of stock options	6,960		6,960
Balance at Jun. 30, 2011	$ 347,663	$ 897	$ 222,222	$ 133,941	$ (9,397)
Balance (in shares) at Jun. 30, 2011		89,686,170			4,988,538