Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 652,036	$ 594,462
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(1,182)	(782)
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Total net sales	243,066	226,712
Fluid & Metering Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	243,066	226,712
Fluid & Metering Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(299)	(149)
Fluid & Metering Technologies | Energy | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	45,362	38,514
Fluid & Metering Technologies | Valves | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	28,061	26,207
Fluid & Metering Technologies | Water | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	61,616	58,336
Fluid & Metering Technologies | Pumps | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	82,351	81,830
Fluid & Metering Technologies | Agriculture | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,975	21,974
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Total net sales	249,507	223,456
Health & Science Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	249,507	223,456
Health & Science Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(862)	(603)
Health & Science Technologies | Scientific Fluidics & Optics | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	114,357	106,142
Health & Science Technologies | Sealing Solutions | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	65,571	55,330
Health & Science Technologies | Gast | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	32,872	27,346
Health & Science Technologies | Micropump | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	7,636	7,715
Health & Science Technologies | Material Processing Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	29,933	27,526
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Total net sales	159,463	144,294
Fire & Safety/Diversified Products | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	159,463	144,294
Fire & Safety/Diversified Products | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(21)	(30)
Fire & Safety/Diversified Products | Fire & Safety | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	96,810	94,068
Fire & Safety/Diversified Products | BAND-IT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,813	25,233
Fire & Safety/Diversified Products | Dispensing | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 36,861	$ 25,023