SEGMENT AND GEOGRAPHIC INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information
Net sales	$ 451,470	$ 333,046
Operating income/(loss)	39,941	33,791
Total assets	1,683,189		$ 1,575,165
Corporate And Eliminations
Segment Reporting Information
Net sales	(28,500)	(17,100)
Operating income/(loss)	(20,400)	(14,400)
Total assets	35,500		44,200
Water Systems | Operating Segments
Segment Reporting Information
Net sales	272,600	197,600
Operating income/(loss)	33,200	31,300
Total assets	951,200		894,400
Water Systems | United States & Canada
Segment Reporting Information
Net sales	134,700	84,200
Water Systems | United States & Canada | Intersegment Sales
Segment Reporting Information
Net sales	28,500	17,100
Water Systems | Latin America
Segment Reporting Information
Net sales	37,900	31,700
Water Systems | EMEA
Segment Reporting Information
Net sales	51,000	44,400
Water Systems | Asia Pacific
Segment Reporting Information
Net sales	20,500	20,200
Distribution | Operating Segments
Segment Reporting Information
Net sales	134,900	95,700
Operating income/(loss)	9,400	2,000
Total assets	419,400		363,000
Distribution | United States & Canada
Segment Reporting Information
Net sales	134,900	95,700
Distribution | United States & Canada | Intersegment Sales
Segment Reporting Information
Net sales	0	0
Fueling Systems | Operating Segments
Segment Reporting Information
Net sales	72,500	56,800
Operating income/(loss)	17,700	14,900
Total assets	277,100		$ 273,600
Fueling Systems | Intersegment Sales
Segment Reporting Information
Net sales	0	0
Fueling Systems | United States & Canada
Segment Reporting Information
Net sales	51,900	37,700
Fueling Systems | All Other
Segment Reporting Information
Net sales	$ 20,600	$ 19,100