Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 1,550,497	$ 1,342,532	$ 1,175,270
Cost of sales	830,666	733,547	666,579
Gross profit	719,831	608,985	508,691
Selling, general and administrative expenses	246,534	216,194	201,901
Engineering, research and development expenses	118,456	106,951	106,991
Amortization of intangible assets	62,152	44,023	44,263
Operating income	292,689	241,817	155,536
Interest expense	34,094	32,343	36,846
Interest income	(3,839)	(715)	(318)
Other expense (income), net	8,002	25,458	(991)
Income before income tax expense	254,432	184,731	119,999
Income tax expense	13,677	99,665	22,852
Net income	$ 240,755	$ 85,066	$ 97,147
Earnings Per Share:
Basic net income per common share	$ 1.71	$ 0.60	$ 0.69
Diluted net income per common share	$ 1.69	$ 0.59	$ 0.68
Weighted average shares outstanding
Basic	141,026	141,553	141,093
Diluted	142,610	143,518	142,050