Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gross sales	$ 106,379	$ 97,972	$ 184,563	$ 164,164
Commissions, allowances and rebates	365	625	816	1,174
Net sales	106,014	97,347	183,747	162,990
Other revenue	621	546	413	1,008
Net revenues	106,635	97,893	184,160	163,998
Cost of goods sold	60,690	64,478	109,136	114,005
Gross profit	45,945	33,415	75,024	49,993
Operating expenses:
Selling, general and administrative expenses	14,078	14,560	27,829	26,193
Research and development expenses	2,703	3,631	5,358	6,106
Total operating expenses	16,781	18,191	33,187	32,299
Operating profit	29,164	15,224	41,837	17,694
Other expenses/(income):
Interest expense, net	474	543	950	1,065
Equity in losses of partially-owned affiliates		4,272	4	4,618
Other income, net	(232)	(3)	(174)	(21)
Income before income taxes	28,922	10,412	41,057	12,032
Provision/(benefit) for income taxes	9,472	(9,415)	13,239	(8,961)
Income from continuing operations	19,450	19,827	27,818	20,993
Income/(loss) from discontinued operations, net of tax	213	(160)	(162)	(344)
Net income	$ 19,663	$ 19,667	$ 27,656	$ 20,649
Basic earnings/(loss) per share of common stock:
Income from continuing operations (in Dollars per share)	$ 0.62	$ 0.65	$ 0.89	$ 0.69
Income/(loss) from discontinued operations, net of tax (in Dollars per share)	0.01	(0.01)	(0.01)	(0.02)
Net income (in Dollars per share)	0.63	0.64	0.88	0.67
Diluted earnings/(loss) per share of common stock:
Income from continuing operations (in Dollars per share)	0.60	0.63	0.86	0.67
Income/(loss) from discontinued operations, net of tax (in Dollars per share)	0.01	0.00	0.00	(0.01)
Net income (in Dollars per share)	$ 0.61	$ 0.63	$ 0.86	$ 0.66
Weighted average shares outstanding:
Basic (in Shares)	31,330	30,647	31,271	30,596
Effect of dilutive stock based compensation (in Shares)	1,096	781	1,038	802
Diluted (in Shares)	32,426	31,428	32,309	31,398