CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 230,708	$ 211,711
Cost of sales	164,880	157,161
Gross profit	65,828	54,550
Selling, general and administrative expenses	49,610	44,776
Restructuring and integration expenses	418	124
Other income, net	230	53
Operating income	16,030	9,703
Other non-operating expense, net	(196)	(42)
Interest expense	572	713
Earnings from continuing operations before taxes	15,262	8,948
Provision for income taxes	5,696	3,454
Earnings from continuing operations	9,566	5,494
Loss from discontinued operations, net of income taxes	(392)	(300)
Net earnings	$ 9,174	$ 5,194
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 0.42	$ 0.24
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.01)
Net earnings per common share - Basic (in dollars per share)	$ 0.40	$ 0.23
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	$ 0.41	$ 0.24
Discontinued operations (in dollars per share)	$ (0.01)	$ (0.02)
Net earnings per common share - Diluted (in dollars per share)	$ 0.40	$ 0.22
Dividends declared per share (in dollars per share)	$ 0.11	$ 0.09
Average number of common shares (in shares)	22,853,494	22,867,519
Average number of common shares and dilutive common shares (in shares)	23,095,490	23,103,858