CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Revenue	$ 351,542	$ 348,583
Cost of goods sold	183,010	164,596
Gross profit	168,532	183,987
Operating expenses:
Research and development	36,326	36,684
Selling, general and administrative	81,942	78,173
Restructuring expenses	7,813	0
Total operating expenses	126,081	114,857
Earnings from operations	42,451	69,130
Interest expense	3,708	2,897
Interest income	(264)	(191)
Other income, net	(198)	(764)
Earnings before income taxes	39,205	67,188
Income tax provision	9,311	15,552
Net earnings	$ 29,894	$ 51,636
Earnings per share:
Basic	$ 0.21	$ 0.36
Diluted	$ 0.21	$ 0.35
Weighted average shares outstanding:
Basic	140,932	144,629
Diluted	143,828	146,291