Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 712,019	$ 581,113	$ 2,050,002	$ 1,736,824
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(671)	(908)	(3,007)	(2,297)
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Total net sales	251,297	220,553	745,202	666,187
Fluid & Metering Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	251,297	220,553	745,202	666,187
Fluid & Metering Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	0	(194)	(737)	(533)
Fluid & Metering Technologies | Energy | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	40,430	56,155	125,860	150,483
Fluid & Metering Technologies | Valves | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	29,020	29,533	91,565	86,596
Fluid & Metering Technologies | Water1 | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	64,865	57,190	189,013	165,114
Fluid & Metering Technologies | Pumps | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	90,026	59,585	261,457	201,970
Fluid & Metering Technologies | Agriculture | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	26,956	18,284	78,044	62,557
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Total net sales	301,637	219,671	825,440	658,361
Health & Science Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	301,637	219,671	825,440	658,361
Health & Science Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(650)	(707)	(2,228)	(1,744)
Health & Science Technologies | Scientific Fluidics & Optics | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	131,198	100,569	375,990	313,275
Health & Science Technologies | Sealing Solutions | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	67,696	50,726	202,432	151,257
Health & Science Technologies | Performance Pneumatic Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	62,181	32,173	125,355	87,558
Health & Science Technologies | Micropump | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	8,519	7,273	24,794	22,260
Health & Science Technologies | Material Processing Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	32,693	29,637	99,097	85,755
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Total net sales	159,085	140,889	479,360	412,276
Fire & Safety/Diversified Products | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	159,085	140,889	479,360	412,276
Fire & Safety/Diversified Products | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(21)	(7)	(42)	(20)
Fire & Safety/Diversified Products | Fire & Safety | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	92,305	94,065	287,107	280,428
Fire & Safety/Diversified Products | BAND-IT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,166	22,692	74,843	64,228
Fire & Safety/Diversified Products | Dispensing | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 41,635	$ 24,139	$ 117,452	$ 67,640