Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Product	$ 89,154	$ 85,244	$ 183,263	$ 167,824
Services and other revenues	23,634	19,808	45,746	38,992
Total revenues	112,788	105,052	229,009	206,816
Cost of revenues:
Cost of product revenues	46,203	41,003	91,619	79,903
Cost of services and other revenues	9,123	8,009	18,243	16,378
Total cost of revenues	55,326	49,012	109,862	96,281
Gross profit	57,462	56,040	119,147	110,535
Operating expenses:
Research and development	8,746	6,471	16,765	12,592
Selling, general and administrative	39,735	37,011	83,022	75,431
Gain on business combination	(3,443)	0	(3,443)	0
Total operating expenses	45,038	43,482	96,344	88,023
Income from operations	12,424	12,558	22,803	22,512
Interest and other (expense), net	(472)	(40)	(989)	(296)
Income before provision for income taxes	11,952	12,518	21,814	22,216
Provision for income taxes	3,201	4,729	6,745	8,233
Net income	$ 8,751	$ 7,789	$ 15,069	$ 13,983
Net income per share:
Basic (in dollars per share)	$ 0.24	$ 0.22	$ 0.42	$ 0.39
Diluted (in dollars per share)	$ 0.24	$ 0.21	$ 0.41	$ 0.38
Weighted-average shares outstanding:
Basic (in shares)	36,120	35,661	36,072	35,451
Diluted (in shares)	37,030	36,618	36,987	36,478