Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 652,036	$ 594,462
Operating income (loss)	155,547	139,941
Interest expense	10,776	10,877
Other (income) expense - net	(848)	1,565
Income before income taxes	145,619	127,499
Total assets	4,460,731		$ 4,414,398
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(1,182)	(782)
Corporate office and other
Segment Reporting Information [Line Items]
Operating income (loss)	(18,560)	(17,510)
Total assets	565,777		559,374
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales	243,066	226,712
Operating income (loss)	62,897	66,771
Fluid & Metering Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	299	149
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	243,365	226,861
Total assets	1,532,987		1,387,067
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales	249,507	223,456
Operating income (loss)	66,650	52,643
Health & Science Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	862	603
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	250,369	224,059
Total assets	1,563,473		1,576,093
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales	159,463	144,294
Operating income (loss)	44,560	38,037
Fire & Safety/Diversified Products | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	21	30
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales	159,484	$ 144,324
Total assets	$ 798,494		$ 891,864