Consolidated Income Statements (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Income Statements (unaudited) [Abstract]
Gross sales	$ 66,192	$ 74,581
Commissions, allowances and rebates	549	163
Net sales	65,643	74,418
Other revenue	462	467
Net revenues	66,105	74,885
Cost of goods sold	49,527	50,136
Gross profit	16,578	24,749
Operating expenses:
Selling, general and administrative expenses	11,633	11,104
Research and development expenses	2,475	2,194
Total operating expenses	14,108	13,298
Gain on sale of asset	0	4,680
Operating profit	2,470	16,131
Other expenses/(income):
Interest expense, net	522	495
Other income, net	(18)	(32)
Equity in losses of partially-owned affiliates	346	481
Income before income taxes	1,620	15,187
Provision for income taxes	454	3,762
Income from continuing operations	1,166	11,425
Loss from discontinued operations, net of tax	(184)	(257)
Net income	$ 982	$ 11,168
Basic earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.04	$ 0.38
Loss from discontinued operations, net of tax (in dollars per share)	$ (0.01)	$ (0.01)
Net income (in dollars per share)	$ 0.03	$ 0.37
Diluted earnings/(loss) per share of common stock:
Income from continuing operations (in dollars per share)	$ 0.04	$ 0.37
Loss from discontinued operations, net of tax (in dollars per share)	$ (0.01)	$ (0.01)
Net income (in dollars per share)	$ 0.03	$ 0.36
Weighted average shares outstanding:
Basic (in shares)	30,546	29,970
Effect of dilutive stock based compensation (in shares)	862	818
Diluted (in shares)	31,408	30,788