CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Revenue	$ 348,583	$ 348,452
Cost of goods sold	164,596	165,725
Gross profit	183,987	182,727
Operating expenses:
Research and development	36,684	36,571
Selling, general and administrative	78,173	77,860
Total operating expenses	114,857	114,431
Earnings from operations	69,130	68,296
Interest expense	2,897	3,066
Interest income	(191)	(428)
Other income, net	(764)	(1,225)
Earnings from continuing operations before income taxes	67,188	66,883
Income tax provision	15,552	18,058
Earnings from continuing operations	51,636	48,825
Loss from discontinued operations, net of tax	0	(686)
Net earnings	$ 51,636	$ 48,139
Basic earnings per share:
Continuing operations	$ 0.36	$ 0.32
Discontinued operations	$ 0.00	$ 0.00
Basic earnings per share	$ 0.36	$ 0.31
Diluted earnings per share:
Continuing operations	$ 0.35	$ 0.31
Discontinued operations	$ 0.00	$ 0.00
Diluted earnings per share	$ 0.35	$ 0.31
Weighted average shares outstanding:
Basic	144,629	154,485
Diluted	146,291	156,972