Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Total revenues	$ 174,653	$ 147,968
Cost of sales	59,662	57,041
Gross profit	114,991	90,927
Research and development	16,379	13,930
Sales and marketing	30,738	29,589
General and administrative	14,332	13,431
Acquisition and integration costs	1,914	2,824
Total operating expenses	63,363	59,774
Operating income	51,628	31,153
Interest and other expense, net	2,807	4,582
Income before income taxes	48,821	26,571
Provision for income taxes	8,584	1,727
Net income	$ 40,237	$ 24,844
Basic earnings per share	$ 0.96	$ 0.63
Diluted earnings per share	$ 0.93	$ 0.60
Shares used in basic per share calculation	42,056	39,704
Shares used in diluted per share calculation	43,403	42,907