CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
NET SALES	$ 223,217	$ 214,379	$ 433,203	$ 391,343
COST OF GOODS SOLD	152,913	153,086	301,318	283,867
Gross profit	70,304	61,293	131,885	107,476
OPERATING EXPENSES
Selling, general and administrative	33,291	35,080	65,621	65,456
Research and development	12,781	12,145	25,701	22,225
Other operating expenses	1,089	3,830	3,077	5,781
Total operating expenses	47,161	51,055	94,399	93,462
Income from operations	23,143	10,238	37,486	14,014
OTHER INCOME (EXPENSES)	359	277	(991)	798
Income before income taxes and noncontrolling interest	23,502	10,515	36,495	14,812
INCOME TAX PROVISION	5,651	1,475	8,198	8,049
NET INCOME	17,851	9,040	28,297	6,763
Less: NET INCOME attributable to noncontrolling interest	(466)	(405)	(710)	(54)
NET INCOME attributable to common stockholders	$ 17,385	$ 8,635	$ 27,587	$ 6,709
EARNINGS PER SHARE attributable to common stockholders
Basic	$ 0.37	$ 0.19	$ 0.59	$ 0.15
Diluted	$ 0.36	$ 0.18	$ 0.57	$ 0.14
Number of shares used in computation
Basic	46,889	46,148	46,794	46,085
Diluted	48,423	47,507	48,223	47,383