Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 685,947	$ 561,249	$ 1,337,983	$ 1,155,711
Operating income (loss)	158,256	110,594	313,803	250,535
Interest expense	11,205	12,439	21,981	23,316
Other (income) expense - net	17,175	6,460	16,327	8,025
Income before income taxes	129,876	91,695	275,495	219,194
Total assets	4,782,997		4,782,997		$ 4,414,398
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(1,154)	(607)	(2,336)	(1,389)
Corporate office and other
Segment Reporting Information [Line Items]
Operating income (loss)	(23,971)	(17,188)	(42,531)	(34,698)
Total assets	283,818		283,818		559,374
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales	250,839	218,922	493,905	445,634
Operating income (loss)	63,467	50,938	126,364	117,709
Fluid & Metering Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	438	190	737	339
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	251,277	219,112	494,642	445,973
Total assets	1,545,829		1,545,829		1,387,067
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales	274,296	215,234	523,803	438,690
Operating income (loss)	75,963	48,007	142,613	100,650
Health & Science Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	716	434	1,578	1,037
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	275,012	215,668	525,381	439,727
Total assets	2,127,316		2,127,316		1,576,093
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales	160,812	127,093	320,275	271,387
Operating income (loss)	42,797	28,837	87,357	66,874
Fire & Safety/Diversified Products | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	0	(17)	21	13
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales	160,812	$ 127,076	320,296	$ 271,400
Total assets	$ 826,034		$ 826,034		$ 891,864