CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Operations [Abstract]
NET SALES	$ 176,964	$ 144,663
COST OF GOODS SOLD	130,781	110,957
Gross profit	46,183	33,706
OPERATING EXPENSES
Selling, general and administrative	30,376	22,146
Research and development	10,080	7,164
Other operating (income) expenses	1,951	(1,104)
Total operating expenses	42,407	28,206
Income from operations	3,776	5,500
OTHER INCOME (EXPENSES)	521	687
Income before income taxes and noncontrolling interest	4,297	6,187
INCOME TAX PROVISION	6,574	618
NET INCOME (LOSS)	(2,277)	5,569
Less: NET (INCOME) LOSS attributable to noncontrolling interest	351	(698)
NET INCOME (LOSS) attributable to common stockholders	$ (1,926)	$ 4,871
EARNINGS (LOSS) PER SHARE attributable to common stockholders
Basic	$ (0.04)	$ 0.11
Diluted	$ (0.04)	$ 0.10
Number of shares used in computation
Basic	46,021	45,460
Diluted	46,021	46,935