CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue	$ 1,775,686	$ 1,800,434	$ 1,662,167
Cost of Goods Sold	875,368	941,658	895,046
Gross profit	900,318	858,776	767,121
Operating expenses:
Research and development	(176,281)	(170,735)	(147,537)
Selling, general and administrative	(386,869)	(373,867)	(322,435)
Restructuring expenses	(4,854)	(625)	(1,431)
Loss on assets held for sale	0	23,588	0
Loss on sale of business	13,708		0
Total operating expenses	581,712	568,815	471,403
Earnings from operations	318,606	289,961	295,718
Interest expense	16,147	16,804	18,071
Interest income	(3,901)	(1,764)	(1,402)
Other (income) expense, net	(743)	(4,144)	3,092
Earnings before income taxes	307,103	279,065	275,957
Income tax provision	24,678	171,842	109,331
Net earnings	$ 282,425	$ 107,223	$ 166,626
Net earnings per share:
Basic earnings per share (in dollars per share)	$ 2.05	$ 0.78	$ 1.22
Diluted earnings per share (in dollars per share)	$ 2.01	$ 0.77	$ 1.20