CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenue	$ 1,662,167	$ 1,557,067	$ 1,530,654
Cost of goods sold	895,046	803,506	780,281
Gross profit	767,121	753,561	750,373
Operating expenses:
Research and development	147,537	132,892	142,751
Selling, general and administrative	322,435	313,544	331,995
Restructuring expenses	1,431	1,361	16,383
Total operating expenses	471,403	447,797	491,129
Earnings from operations	295,718	305,764	259,244
Interest expense	18,071	14,086	14,593
Interest income	(1,402)	(1,167)	(1,405)
Other expense (income), net	3,092	(12,601)	(3,473)
Earnings before income taxes	275,957	305,446	249,529
Income tax provision	109,331	63,760	49,268
Net earnings	$ 166,626	$ 241,686	$ 200,261
Net earnings per share:
Basic earnings per share (in dollars per share)	$ 1.22	$ 1.73	$ 1.42
Diluted earnings per share (in dollars per share)	$ 1.20	$ 1.72	$ 1.39