Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 561,249	$ 642,099	$ 1,155,711	$ 1,264,330
Operating income	110,594	155,283	250,535	303,065
Interest expense	12,439	11,011	23,316	21,932
Other (income) expense - net	6,460	(378)	8,025	(518)
Income before income taxes	91,695	144,650	219,194	281,651
Total assets	4,073,592		4,073,592		$ 3,813,912
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(607)	(386)	(1,389)	(2,126)
Corporate office
Segment Reporting Information [Line Items]
Operating income	(17,188)	(19,240)	(34,698)	(37,806)
Total assets	464,189		464,189		330,694
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales	218,922	246,111	445,634	488,447
Operating income	50,938	74,146	117,709	146,012
Fluid & Metering Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	190	78	339	264
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	219,112	246,189	445,973	488,711
Total assets	1,318,336		1,318,336		1,150,712
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales	215,234	232,172	438,690	456,860
Operating income	48,007	56,763	100,650	110,917
Health & Science Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	434	81	1,037	683
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	215,668	232,253	439,727	457,543
Total assets	1,509,374		1,509,374		1,507,108
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales	127,093	163,816	271,387	319,023
Operating income	28,837	43,614	66,874	83,942
Fire & Safety/Diversified Products | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(17)	227	13	1,179
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales	127,076	$ 164,043	271,400	$ 320,202
Total assets	$ 781,693		$ 781,693		$ 825,398