CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	$ 406,814	$ 379,472
Cost of goods sold	215,493	201,782
Gross profit	191,321	177,690
Operating expenses:
Research and development	41,983	37,280
Selling, general and administrative	90,252	83,033
Total operating expenses	132,235	120,313
Earnings from operations	59,086	57,377
Interest expense	4,453	3,447
Interest income	(271)	(260)
Other income, net	(660)	(1,430)
Earnings before income taxes	55,564	55,620
Income tax provision	12,993	54,495
Net earnings	$ 42,571	$ 1,125
Net earnings per share:
Basic earnings per share (in dollars per share)	$ 0.31	$ 0.01
Diluted earnings per share (in dollars per share)	$ 0.31	$ 0.01
Weighted Average Number of Shares Outstanding, Basic	136,359	137,496
Weighted Average Number of Shares Outstanding, Diluted	138,239	138,779