Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Total net sales	$ 581,113	$ 624,246	$ 1,736,824	$ 1,888,576
Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(908)	(768)	(2,297)	(2,894)
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Total net sales	220,553	240,758	666,187	729,205
Fluid & Metering Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	220,553	240,758	666,187	729,205
Fluid & Metering Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(194)	(103)	(533)	(367)
Fluid & Metering Technologies | Energy | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	56,155	42,876	150,483	122,882
Fluid & Metering Technologies | Valves | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	26,901	30,764	78,822	89,955
Fluid & Metering Technologies | Water | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	59,822	62,611	172,888	188,891
Fluid & Metering Technologies | Pumps | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	59,585	84,936	201,970	260,321
Fluid & Metering Technologies | Agriculture | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	18,284	19,674	62,557	67,523
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Total net sales	219,671	228,988	658,361	685,848
Health & Science Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	219,671	228,988	658,361	685,848
Health & Science Technologies | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(707)	(622)	(1,744)	(1,305)
Health & Science Technologies | Scientific Fluidics & Optics | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	100,569	108,869	313,275	325,731
Health & Science Technologies | Sealing Solutions | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	50,726	51,389	151,257	148,326
Health & Science Technologies | Gast | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	32,173	32,699	87,558	104,007
Health & Science Technologies | Micropump | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	7,273	8,273	22,260	25,299
Health & Science Technologies | Material Processing Technologies | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	29,637	28,380	85,755	83,790
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Total net sales	140,889	154,500	412,276	473,523
Fire & Safety/Diversified Products | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	140,889	154,500	412,276	473,523
Fire & Safety/Diversified Products | Intersegment elimination
Disaggregation of Revenue [Line Items]
Total net sales	(7)	(43)	(20)	(1,222)
Fire & Safety/Diversified Products | Fire & Safety | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	94,065	100,389	280,428	303,094
Fire & Safety/Diversified Products | BAND-IT | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	22,692	26,087	64,228	81,757
Fire & Safety/Diversified Products | Dispensing | Operating segments
Disaggregation of Revenue [Line Items]
Total net sales	$ 24,139	$ 28,067	$ 67,640	$ 89,894