SEGMENT AND GEOGRAPHIC INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting Information
Net sales	$ 551,672	$ 459,019	$ 1,554,280	$ 1,229,345
Operating income/(loss)	80,044	56,594	200,967	141,986
Total assets	1,715,007		1,715,007		$ 1,575,165
Corporate And Eliminations
Segment Reporting Information
Net sales	(24,800)	(22,900)	(89,800)	(66,900)
Operating income/(loss)	(13,100)	(16,400)	(50,800)	(48,300)
Total assets	48,300		48,300		44,200
Water Systems | Operating Segments
Segment Reporting Information
Net sales	293,100	260,700	876,200	705,500
Operating income/(loss)	45,500	36,800	127,700	102,700
Total assets	1,016,600		1,016,600		894,400
Water Systems | United States & Canada
Segment Reporting Information
Net sales	158,900	134,800	452,000	333,100
Water Systems | United States & Canada | Intersegment Sales
Segment Reporting Information
Net sales	24,800	22,900	89,800	66,900
Water Systems | Latin America
Segment Reporting Information
Net sales	41,300	36,500	120,900	102,900
Water Systems | EMEA
Segment Reporting Information
Net sales	46,000	46,900	146,700	142,700
Water Systems | Asia Pacific
Segment Reporting Information
Net sales	22,100	19,600	66,800	59,900
Distribution | Operating Segments
Segment Reporting Information
Net sales	193,200	140,200	519,200	380,700
Operating income/(loss)	19,000	12,300	51,700	30,300
Total assets	373,400		373,400		363,000
Distribution | United States & Canada
Segment Reporting Information
Net sales	193,200	140,200	519,200	380,700
Distribution | United States & Canada | Intersegment Sales
Segment Reporting Information
Net sales	0	0	0	0
Fueling Systems | Operating Segments
Segment Reporting Information
Net sales	90,200	81,000	248,700	210,000
Operating income/(loss)	28,600	23,900	72,400	57,300
Total assets	276,700		276,700		$ 273,600
Fueling Systems | Intersegment Sales
Segment Reporting Information
Net sales	0	0	0	0
Fueling Systems | United States & Canada
Segment Reporting Information
Net sales	66,500	58,900	182,500	146,600
Fueling Systems | All Other
Segment Reporting Information
Net sales	$ 23,700	$ 22,100	$ 66,200	$ 63,400