Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue	$ 333,067	$ 282,535	$ 238,091
Cost of revenue	152,898	129,917	110,190
Gross profit	180,169	152,618	127,901
Operating expenses:
Research and development	65,787	58,590	49,733
Selling, general and administrative	72,312	66,755	54,624
Litigation expense (benefit), net	1,000	(8,027)	(371)
Total operating expenses	139,099	117,318	103,986
Income from operations	41,070	35,300	23,915
Interest and other income, net	1,421	1,092	92
Income before income taxes	42,491	36,392	24,007
Income tax provision	7,319	897	1,109
Net income	$ 35,172	$ 35,495	$ 22,898
Net income per share:
Basic (in Dollars per share)	$ 0.89	$ 0.92	$ 0.61
Diluted (in Dollars per share)	$ 0.86	$ 0.89	$ 0.59
Weighted-average shares outstanding:
Basic (in Shares)	39,470	38,686	37,387
Diluted (in Shares)	40,869	39,793	38,620
Cash dividends declared per common share (in Dollars per share)	$ 0.80	$ 0.45