CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Operations [Abstract]
NET SALES	$ 214,379	$ 159,239	$ 391,343	$ 303,902
COST OF GOODS SOLD	153,086	118,211	283,867	229,168
Gross profit	61,293	41,028	107,476	74,734
OPERATING EXPENSES
Selling, general and administrative	35,080	24,760	65,456	46,906
Research and development	12,145	8,218	22,225	15,382
Other operating (income) expenses	3,830	(254)	5,781	(1,358)
Total operating expenses	51,055	32,724	93,462	60,930
Income from operations	10,238	8,304	14,014	13,804
OTHER INCOME (EXPENSES)	277	251	798	938
Income before income taxes and noncontrolling interest	10,515	8,555	14,812	14,742
INCOME TAX PROVISION	1,475	856	8,049	1,474
NET INCOME	9,040	7,699	6,763	13,268
Less: NET INCOME attributable to noncontrolling interest	(405)	(1,046)	(54)	(1,744)
NET INCOME attributable to common stockholders	$ 8,635	$ 6,653	$ 6,709	$ 11,524
EARNINGS PER SHARE attributable to common stockholders
Basic	$ 0.19	$ 0.15	$ 0.15	$ 0.25
Diluted	$ 0.18	$ 0.14	$ 0.14	$ 0.25
Number of shares used in computation
Basic	46,148	45,642	46,085	45,551
Diluted	47,507	46,859	47,383	46,916