CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 272,540	$ 270,126	$ 505,292	$ 500,834
Cost of sales	195,141	192,330	359,983	357,210
Gross profit	77,399	77,796	145,309	143,624
Selling, general and administrative expenses	48,847	50,588	96,441	100,198
Litigation charge	10,650	0	10,650	0
Restructuring and integration expenses	555	200	726	618
Other income, net	273	212	533	442
Operating income	17,620	27,220	38,025	43,250
Other non-operating income (expense), net	307	(64)	(106)	(260)
Interest expense	457	646	765	1,218
Earnings from continuing operations before taxes	17,470	26,510	37,154	41,772
Provision for income taxes	6,301	10,110	13,578	15,806
Earnings from continuing operations	11,169	16,400	23,576	25,966
Loss from discontinued operations, net of income taxes	(529)	(357)	(1,211)	(749)
Net earnings	$ 10,640	$ 16,043	$ 22,365	$ 25,217
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 0.49	$ 0.71	$ 1.03	$ 1.13
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.05)	$ (0.03)
Net earnings per common share - Basic (in dollars per share)	$ 0.47	$ 0.70	$ 0.98	$ 1.10
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	$ 0.48	$ 0.71	$ 1.02	$ 1.12
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.02)	$ (0.06)	$ (0.03)
Net earnings per common share - Diluted (in dollars per share)	$ 0.46	$ 0.69	$ 0.96	$ 1.09
Dividends declared per share (in dollars per share)	$ 0.13	$ 0.11	$ 0.26	$ 0.22
Average number of common shares (in shares)	22,874,002	22,981,337	22,910,419	22,917,769
Average number of common shares and dilutive common shares (in shares)	23,196,713	23,261,118	23,219,055	23,190,091