Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total net sales	$ 561,249	$ 642,099	$ 1,155,711	$ 1,264,330
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(607)	(386)	(1,389)	(2,126)
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Total net sales	218,922	246,111	445,634	488,447
Fluid & Metering Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	218,922	246,111	445,634	488,447
Fluid & Metering Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(190)	(78)	(339)	(264)
Fluid & Metering Technologies | Energy | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	55,814	40,608	94,328	80,006
Fluid & Metering Technologies | Valves | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	25,714	29,809	51,921	59,191
Fluid & Metering Technologies | Water | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	54,730	65,148	113,066	126,280
Fluid & Metering Technologies | Pumps | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	60,555	87,125	142,385	175,385
Fluid & Metering Technologies | Agriculture | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	22,299	23,499	44,273	47,849
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Total net sales	215,234	232,172	438,690	456,860
Health & Science Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	215,234	232,172	438,690	456,860
Health & Science Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(434)	(81)	(1,037)	(683)
Health & Science Technologies | Scientific Fluidics & Optics | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	106,564	109,554	212,706	216,862
Health & Science Technologies | Sealing Solutions | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	45,201	46,431	100,531	96,937
Health & Science Technologies | Gast | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	28,039	37,399	55,385	71,308
Health & Science Technologies | Micropump | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	7,272	8,271	14,987	17,026
Health & Science Technologies | Material Processing Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	28,592	30,598	56,118	55,410
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Total net sales	127,093	163,816	271,387	319,023
Fire & Safety/Diversified Products | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	127,093	163,816	271,387	319,023
Fire & Safety/Diversified Products | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	17	(227)	(13)	(1,179)
Fire & Safety/Diversified Products | Fire & Safety | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	92,295	103,257	186,363	202,705
Fire & Safety/Diversified Products | BAND-IT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	16,303	27,758	41,536	55,670
Fire & Safety/Diversified Products | Dispensing | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 18,478	$ 33,028	$ 43,501	$ 61,827