Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Net revenues:
Products	$ 158,520		$ 139,846		$ 497,172		$ 388,998
Services	28,278		26,607		80,676		76,028
Total net revenues	186,798		166,453		577,848		465,026
Cost of revenues:
Cost of products	89,181		87,809		276,905		237,590
Cost of services	18,292		16,410		52,611		48,542
Total cost of revenues (exclusive of amortization shown separately below)	107,473		104,219		329,516		286,132
Gross profit	79,325		62,234		248,332		178,894
Research and development	15,827		15,257		46,866		47,318
Selling, general and administrative	32,365		33,158		99,195		102,140
Insurance reimbursement							(1,071)
Acquisition costs					499		171
Restructuring	1,223		1,126		1,970		1,364
Amortization of intangible assets	1,760		361		3,214		1,537
Income from operations	28,150		12,332		96,588		27,435
Interest income	399		221		895		760
Interest expense	5		13		35		50
Income before income taxes	28,544		12,540		97,448		28,145
(Benefit) provision for income taxes	(573)		10,082		15,862		12,606
Net income	29,117		2,458		81,586		15,539
Other comprehensive income:
Changes in value of financial instruments designated as cash flow hedges, net of tax expense (benefit)	1,302	[1]	(891)	[1]	458	[1]	185	[1]
Foreign currency translation adjustments, net of tax of $0 for the three months and nine months ended September 30, 2014 and 2013	(9,598)		5,593		(7,604)		(3,582)
Unrealized (loss) gain on investments, net of tax expense (benefit)	(71)	[2]	48	[2]	(29)	[2]	(13)	[2]
Total comprehensive income	$ 20,750		$ 7,208		$ 74,411		$ 12,129
Net income per share:
Basic	$ 0.55		$ 0.05		$ 1.53		$ 0.29
Diluted	$ 0.55		$ 0.05		$ 1.52		$ 0.29
Cash dividends per common share	$ 0.165		$ 0.160		$ 0.490		$ 0.480
Weighted average common shares outstanding:
Basic	53,054		53,165		53,276		52,998
Diluted	53,310		53,513		53,541		53,410

[1] Tax expense (benefit) was $671 and $(491) for the three months ended September 30, 2014 and 2013, respectively. Tax expense was $134 and $161 for the nine months ended September 30, 2014 and 2013, respectively.

[2] Tax (benefit) expense was $(37) and $26 for the three months ended September 30, 2014 and 2013, respectively. Tax (benefit) was $(8) and $(11) for the nine months ended September 30, 2014 and 2013, respectively.