CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 269,382	$ 272,540	$ 496,971	$ 505,292
Cost of sales	196,622	195,141	360,322	359,983
Gross profit	72,760	77,399	136,649	145,309
Selling, general and administrative expenses	51,736	48,847	100,934	96,441
Litigation charge	0	10,650	0	10,650
Restructuring and integration expenses	(26)	555	31	726
Other income, net	262	273	543	533
Operating income	21,312	17,620	36,227	38,025
Other non-operating income (expense), net	548	307	699	(106)
Interest expense	480	457	906	765
Earnings from continuing operations before taxes	21,380	17,470	36,020	37,154
Provision for income taxes	7,572	6,301	12,873	13,578
Earnings from continuing operations	13,808	11,169	23,147	23,576
Loss from discontinued operations, net of income taxes	(430)	(529)	(821)	(1,211)
Net earnings	$ 13,378	$ 10,640	$ 22,326	$ 22,365
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 0.60	$ 0.49	$ 1.01	$ 1.03
Discontinued operations (in dollars per share)	(0.02)	(0.02)	(0.04)	(0.05)
Net earnings per common share - Basic (in dollars per share)	0.58	0.47	0.97	0.98
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	0.59	0.48	1.00	1.02
Discontinued operations (in dollars per share)	(0.01)	(0.02)	(0.04)	(0.06)
Net earnings per common share - Diluted (in dollars per share)	0.58	0.46	0.96	0.96
Dividends declared per share (in dollars per share)	$ 0.15	$ 0.13	$ 0.30	$ 0.26
Average number of common shares (in shares)	22,917,718	22,874,002	22,914,322	22,910,419
Average number of common shares and dilutive common shares (in shares)	23,261,094	23,196,713	23,256,255	23,219,055