SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Dec. 31, 2011
Segment Reporting Information
Net sales to external customers	$ 201,924	$ 185,331
Operating income (Loss)	20,998	15,963
Total assets	931,714		829,530
Water Systems
Segment Reporting Information
Net sales to external customers	165,000	147,200
Operating income (Loss)	26,800	21,500
Total assets	680,700		535,300
Fueling Systems
Segment Reporting Information
Net sales to external customers	36,900	38,100
Operating income (Loss)	5,600	5,300
Total assets	226,900		222,200
Other
Segment Reporting Information
Net sales to external customers	0	0
Operating income (Loss)	(11,400)	(10,800)
Total assets	$ 24,100		$ 72,000