Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 685,947	$ 561,249	$ 1,337,983	$ 1,155,711
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(1,154)	(607)	(2,336)	(1,389)
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Total net sales	250,839	218,922	493,905	445,634
Fluid & Metering Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	250,839	218,922	493,905	445,634
Fluid & Metering Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(438)	(190)	(737)	(339)
Fluid & Metering Technologies | Energy | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	40,068	55,814	85,430	94,328
Fluid & Metering Technologies | Valves | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	29,058	25,714	57,119	51,921
Fluid & Metering Technologies | Water | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	67,958	54,730	129,574	113,066
Fluid & Metering Technologies | Pumps | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	89,080	60,555	171,431	142,385
Fluid & Metering Technologies | Agriculture | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,113	22,299	51,088	44,273
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Total net sales	274,296	215,234	523,803	438,690
Health & Science Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	274,296	215,234	523,803	438,690
Health & Science Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(716)	(434)	(1,578)	(1,037)
Health & Science Technologies | Scientific Fluidics & Optics | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	130,435	106,564	244,792	212,706
Health & Science Technologies | Sealing Solutions | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	69,165	45,201	134,736	100,531
Health & Science Technologies | Performance Pneumatic Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	30,302	28,039	63,174	55,385
Health & Science Technologies | Micropump | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	8,639	7,272	16,275	14,987
Health & Science Technologies | Material Processing Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	36,471	28,592	66,404	56,118
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Total net sales	160,812	127,093	320,275	271,387
Fire & Safety/Diversified Products | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	160,812	127,093	320,275	271,387
Fire & Safety/Diversified Products | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	0	17	(21)	(13)
Fire & Safety/Diversified Products | Fire & Safety | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	97,992	92,295	194,802	186,363
Fire & Safety/Diversified Products | BAND-IT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	23,864	16,303	49,677	41,536
Fire & Safety/Diversified Products | Dispensing | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 38,956	$ 18,478	$ 75,817	$ 43,501