SEGMENT AND GEOGRAPHIC INFORMATION (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Segment Reporting Information
Concentration Risk, Customer									No
Net sales to external customers	$ 205,100,000	$ 237,600,000	$ 246,700,000	$ 201,900,000	$ 187,200,000	$ 224,400,000	$ 224,100,000	$ 185,400,000	$ 891,345,000	$ 821,077,000	$ 713,792,000
Operating income (loss)									112,957,000	93,398,000	63,999,000
Total assets	976,379,000				829,530,000				976,379,000	829,530,000
Depreciation									21,100,000	19,400,000	19,500,000
Amortization									7,200,000	5,900,000	4,600,000
Capital expenditures									42,100,000	21,100,000	12,800,000
Long-lived assets	545,000,000				429,000,000				545,000,000	429,000,000
Water Systems
Segment Reporting Information
Net sales to external customers									715,000,000	654,100,000	583,300,000
Operating income (loss)									124,100,000	105,300,000	84,000,000
Total assets	692,000,000				535,300,000				692,000,000	535,300,000
Depreciation									16,900,000	15,200,000	16,200,000
Amortization									5,700,000	4,200,000	3,200,000
Capital expenditures									25,200,000	13,800,000	10,800,000
Fueling Systems
Segment Reporting Information
Net sales to external customers									176,300,000	167,000,000	130,500,000
Operating income (loss)									36,600,000	31,300,000	17,400,000
Total assets	252,000,000				222,200,000				252,000,000	222,200,000
Depreciation									1,800,000	1,800,000	1,400,000
Amortization									1,500,000	1,700,000	1,400,000
Capital expenditures									3,300,000	1,800,000	100,000
Other
Segment Reporting Information
Operating income (loss)									(47,700,000)	(43,200,000)	(37,400,000)
Total assets	32,400,000				72,000,000				32,400,000	72,000,000
Depreciation									2,400,000	2,400,000	1,900,000
Amortization									0	0	0
Capital expenditures									13,600,000	5,500,000	1,900,000
United States
Segment Reporting Information
Net sales to external customers									428,500,000	371,000,000	319,900,000
Long-lived assets	330,000,000				257,000,000				330,000,000	257,000,000
Foreign
Segment Reporting Information
Net sales to external customers									462,800,000	450,100,000	393,900,000
Long-lived assets	$ 215,000,000				$ 172,000,000				$ 215,000,000	$ 172,000,000