Consolidated Income Statements (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Income Statements [Abstract]
Gross Sales	$ 70,559	$ 61,654
Commissions, allowances and rebates	535	291
Net sales	70,024	61,363
Other	204	(778)
Net revenues	70,228	60,585
Cost of goods sold	47,800	43,130
Gross profit	22,428	17,455
Operating expenses:
Selling, general and administrative expenses	9,960	9,088
Research and development expenses	2,358	3,060
Total operating expenses	12,318	12,148
Operating profit	10,110	5,307
Other expenses/(income)
Interest expense, net	651	573
Other expenses/(income), net	8	(3)
Equity in losses of partially-owned affiliates	208	364
Income before income taxes	9,243	4,373
Provision for income taxes	2,205	1,518
Income from continuing operations	7,038	2,855
Loss from discontinued operations, net of tax	0	(146)
Net income	$ 7,038	$ 2,709
Basic earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.24	$ 0.10
Loss from discontinued operations, net of tax (in dollars per share)	$ 0	$ (0.01)
Net income (in dollars per share)	$ 0.24	$ 0.09
Diluted earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.24	$ 0.10
Loss from discontinued operations, net of tax (in dollars per share)	$ 0	$ (0.01)
Net income (in dollars per share)	$ 0.24	$ 0.09
Weighted average shares outstanding:
Basic (in shares)	29,602	29,448
Effect of dilutive stock based compensation (in shares)	284	70
Diluted (in shares)	29,886	29,518