SEGMENT INFORMATION Details (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010	Jan. 01, 2011
Segment Reporting Information
Net sales to external customers	$ 224,119	$ 190,418	$ 409,449	$ 350,411
Operating income (Loss)	32,783	18,583	48,745	31,137
Total assets	863,761		863,761		788,559
Water Systems
Segment Reporting Information
Net sales to external customers	183,500	160,100	330,700	294,300
Operating income (Loss)	36,300	26,400	57,700	43,700
Total assets	545,000		545,000		458,900
Fueling Systems
Segment Reporting Information
Net sales to external customers	40,600	30,300	78,700	56,100
Operating income (Loss)	7,300	1,900	12,600	6,200
Total assets	220,500		220,500		221,100
Other
Segment Reporting Information
Operating income (Loss)	(10,800)	(9,700)	(21,600)	(18,800)
Total assets	$ 98,300		$ 98,300		$ 108,600