Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 581,113	$ 624,246	$ 1,736,824	$ 1,888,576
Operating income	131,213	141,765	381,748	444,830
Interest expense	10,642	11,330	33,958	33,262
Other (income) expense - net	(704)	1,219	7,321	701
Income before income taxes	121,275	129,216	340,469	410,867
Total assets	4,225,595		4,225,595		$ 3,813,912
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(908)	(768)	(2,297)	(2,894)
Corporate office
Segment Reporting Information [Line Items]
Operating income	(14,204)	(17,853)	(48,902)	(55,659)
Total assets	523,800		523,800		330,694
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales	220,553	240,758	666,187	729,205
Operating income	58,402	77,481	176,111	223,493
Fluid & Metering Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	194	103	533	367
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	220,747	240,861	666,720	729,572
Total assets	1,327,303		1,327,303		1,150,712
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales	219,671	228,988	658,361	685,848
Operating income	49,912	40,170	150,562	151,087
Health & Science Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	707	622	1,744	1,305
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	220,378	229,610	660,105	687,153
Total assets	1,535,745		1,535,745		1,507,108
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales	140,889	154,500	412,276	473,523
Operating income	37,103	41,967	103,977	125,909
Fire & Safety/Diversified Products | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	7	43	20	1,222
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales	140,896	$ 154,543	412,296	$ 474,745
Total assets	$ 838,747		$ 838,747		$ 825,398