CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Condensed Statements of Earnings (Unaudited)
Revenue	$ 363,751	$ 340,868	$ 1,090,431	$ 988,913
Cost of products sold	249,086	234,592	748,916	682,730
Selling and administrative expenses	64,722	58,516	193,642	172,622
Operating income	49,943	47,760	147,873	133,561
Interest expense	4,934	5,224	14,919	15,490
Earnings (loss) before income taxes	45,009	42,536	132,954	118,071
Income taxes	13,012	13,319	41,056	36,702
Net earnings	$ 31,997	$ 29,217	$ 91,898	$ 81,369
Average number of common shares outstanding:
Basic (in shares)	49,776	49,277	49,723	49,051
Diluted (in shares)	49,967	49,565	49,911	49,352
Earnings per common share:
Basic (in dollars per share)	$ 0.64	$ 0.59	$ 1.85	$ 1.66
Diluted (in dollars per share)	$ 0.64	$ 0.59	$ 1.84	$ 1.65
Dividends per common share (in dollars per share)	$ 0.21	$ 0.20	$ 0.63	$ 0.59