CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 236,220	$ 227,540	$ 700,455	$ 637,939
Cost of sales	171,732	167,526	519,642	475,718
Gross profit	64,488	60,014	180,813	162,221
Selling, general and administrative expenses	41,680	41,991	122,336	120,459
Restructuring and integration expenses	275	1,388	743	3,430
Other income, net	258	1,436	789	1,952
Operating income	22,791	18,071	58,523	40,284
Other non-operating income, net	230	300	673	480
Interest expense	757	1,844	3,159	5,710
Earnings from continuing operations before taxes	22,264	16,527	56,037	35,054
Provision for income taxes	8,164	5,430	21,233	13,029
Earnings from continuing operations	14,100	11,097	34,804	22,025
Loss from discontinued operations, net of income taxes	(1,055)	(1,441)	(1,714)	(2,309)
Net earnings	$ 13,045	$ 9,656	$ 33,090	$ 19,716
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 0.62	$ 0.49	$ 1.53	$ 0.98
Discontinued operations (in dollars per share)	$ (0.05)	$ (0.06)	$ (0.08)	$ (0.10)
Net earnings per common share - Basic (in dollars per share)	$ 0.57	$ 0.43	$ 1.45	$ 0.88
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	$ 0.61	$ 0.48	$ 1.51	$ 0.97
Discontinued operations (in dollars per share)	$ (0.04)	$ (0.06)	$ (0.08)	$ (0.10)
Net earnings per common share - Diluted (in dollars per share)	$ 0.57	$ 0.42	$ 1.43	$ 0.87
Dividends declared per share (in dollars per share)	$ 0.07	$ 0.05	$ 0.21	$ 0.15
Average number of common shares (in shares)	22,863,048	22,597,117	22,812,851	22,528,108
Average number of common shares and dilutive common shares (in shares)	23,042,981	23,472,411	23,299,363	22,604,344