CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 270,037	$ 257,046	$ 767,008	$ 762,338
Cost of sales	188,484	179,819	548,806	539,802
Gross profit	81,553	77,227	218,202	222,536
Selling, general and administrative expenses	51,907	48,811	152,841	145,252
Litigation charge	0	0	0	10,650
Restructuring and integration expenses	(80)	343	(49)	1,069
Other income, net	231	268	774	801
Operating income	29,957	28,341	66,184	66,366
Other non-operating income (expense), net	(535)	(955)	164	(1,061)
Interest expense	332	440	1,238	1,205
Earnings from continuing operations before taxes	29,090	26,946	65,110	64,100
Provision for income taxes	9,896	9,140	22,769	22,718
Earnings from continuing operations	19,194	17,806	42,341	41,382
Loss from discontinued operations, net of income taxes	(728)	(8,240)	(1,549)	(9,451)
Net earnings	$ 18,466	$ 9,566	$ 40,792	$ 31,931
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 0.84	$ 0.78	$ 1.85	$ 1.81
Discontinued operations (in dollars per share)	(0.03)	(0.36)	(0.07)	(0.42)
Net earnings per common share - Basic (in dollars per share)	0.81	0.42	1.78	1.39
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	0.83	0.77	1.82	1.79
Discontinued operations (in dollars per share)	(0.03)	(0.36)	(0.06)	(0.41)
Net earnings per common share - Diluted (in dollars per share)	0.80	0.41	1.76	1.38
Dividends declared per share (in dollars per share)	$ 0.15	$ 0.13	$ 0.45	$ 0.39
Average number of common shares (in shares)	22,770,865	22,884,939	22,865,978	22,901,832
Average number of common shares and dilutive common shares (in shares)	23,133,869	23,169,173	23,220,381	23,180,842