CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Revenues	$ 77,012	$ 63,287	$ 150,866	$ 115,004
Cost of sales (exclusive of amortization of intangibles included below)	34,920	27,560	69,629	48,376
GROSS PROFIT	42,092	35,727	81,237	66,628
Selling, general and administrative expenses	13,113	10,940	25,448	21,279
Acquisition-related costs	0	184	519	8,644
Research and development expenses	5,051	4,073	11,020	6,950
Amortization of intangibles	1,677	1,754	3,410	3,317
TOTAL OPERATING EXPENSES	19,841	16,951	40,397	40,190
OPERATING INCOME	22,251	18,776	40,840	26,438
Amortization of deferred financing costs	(207)	(195)	(411)	(388)
Interest expense, net	(2,028)	(2,210)	(4,232)	(4,437)
Other (expense) income, net	(34)	0	42	0
INCOME BEFORE INCOME TAXES	19,982	16,371	36,239	21,613
Income tax provision	7,345	6,665	12,760	8,799
CONSOLIDATED NET INCOME	12,637	9,706	23,479	12,814
CONSOLIDATED NET INCOME PER SHARE:
BASIC (in dollars per share)	$ 0.13	$ 0.10	$ 0.24	$ 0.13
DILUTED (in dollars per share)	$ 0.11	$ 0.09	$ 0.21	$ 0.12
SHARES USED IN COMPUTING CONSOLIDATED NET INCOME PER SHARE:
BASIC (in shares)	96,122	95,096	96,025	95,054
DILUTED (in shares)	112,328	110,513	112,010	109,879
COMPREHENSIVE INCOME:
CONSOLIDATED NET INCOME	12,637	9,706	23,479	12,814
Foreign currency translation loss	(4,979)	(4,757)	(4,621)	(6,960)
COMPREHENSIVE INCOME	$ 7,658	$ 4,949	$ 18,858	$ 5,854