Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Net product sales, including $50,442 and $37,453 to related parties for the years ended December 31, 2014 and 2013	$ 466,773	$ 415,158
Cost of products sold, including $23,506 and $25,916 purchased from related parties for the years ended December 31, 2014 and 2013	379,299	338,526
Gross profit	87,474	76,632
Net gain on other sales	11,821	7,555
Operating expenses:
Selling expenses	15,736	13,331
General and administrative expenses	16,161	13,253
Research and development expenses	22,966	20,885
Total operating expenses	54,863	47,469
Operating income	44,432	36,718
Other income, net	1,021	1,096
Interest expense	(1,788)	(1,569)
Financial income, net	2,416	1,996
Income before income tax expenses and equity in earnings of affiliated companies	46,081	38,241
Less: Income taxes	6,785	5,483
Add: Investment income, net	298	307
Net income	39,594	33,065
Net income attributable to noncontrolling interest	6,052	6,276
Net income attributable to parent company's common shareholders	$ 33,542	$ 26,789
Net income attributable to parent company’s common shareholders per share -
Basic (in dollars per share)	$ 1.15	$ 0.96
Diluted (in dollars per share)	$ 1.15	$ 0.95
Weighted average number of common shares outstanding -
Basic (in shares)	29,062,519	28,043,019
Diluted (in shares)	29,082,809	28,056,144