CONSOLIDATED INCOME STATEMENTS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED INCOME STATEMENTS [Abstract]
Gross Sales	$ 254,475	$ 226,436	$ 236,277
Commissions, allowances and rebates	1,776	1,545	1,402
Net sales	252,699	224,891	234,875
Other	2,954	2,101	(325)
Net revenues	255,653	226,992	234,550
Cost of goods sold	181,569	160,126	164,272
Gross profit	74,084	66,866	70,278
Selling, general and administrative expenses	39,227	34,024	35,711
Research and development expenses	11,037	10,305	7,929
Restructuring expenses	0	1,293	0
Merger and acquisition expenses	0	997	0
Operating profit	23,820	20,247	26,638
Other expenses/(income)
Interest expense, net	2,373	4,391	4,634
Other (income)/expenses, net	(111)	596	(641)
Equity in losses of partially-owned affiliate	1,621	286	0
Income before income taxes	19,937	14,974	22,645
Provision for income taxes	6,202	5,665	12,253
Income from continuing operations	13,735	9,309	10,392
(Loss)/income from discontinued operations, net of tax	(2,767)	338	0
Net income	$ 10,968	$ 9,647	$ 10,392
Basic earnings per share (in dollars per share)
Income from continuing operations (in dollars per share)	$ 0.46	$ 0.32	$ 0.36
(Loss)/income from discontinued operations, net of tax (in dollars per share)	$ (0.09)	$ 0.01	$ 0
Net income (in dollars per share)	$ 0.37	$ 0.33	$ 0.36
Diluted earnings per share (in dollars per share)
Income from continuing operations (in dollars per share)	$ 0.46	$ 0.32	$ 0.36
(Loss)/income from discontinued operations, net of tax (in dollars per share)	$ (0.09)	$ 0.01	$ 0
Net income (in dollars per share)	$ 0.37	$ 0.33	$ 0.36
Weighted average shares outstanding:
Basic weighted average shares outstanding (in shares)	29,468	29,361	29,241
Effect of dilutive stock options and restricted stock (in shares)	96	107	26
Diluted weighted average shares outstanding (in shares)	29,564	29,468	29,267