SEGMENT AND GEOGRAPHIC INFORMATION (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Segment Reporting Information
Net sales to external customers	$ 229,800,000	$ 249,800,000	$ 263,400,000	$ 222,500,000	$ 205,100,000	$ 237,600,000	$ 246,700,000	$ 201,900,000	$ 965,462,000	$ 891,345,000	$ 821,077,000
Operating income (loss)									123,781,000	112,957,000	93,398,000
Total assets	1,051,873,000				976,379,000				1,051,873,000	976,379,000
Depreciation									23,400,000	21,100,000	19,400,000
Amortization									8,000,000	7,200,000	5,900,000
Capital expenditures									67,200,000	42,100,000	21,100,000
Long-lived assets	576,500,000				545,000,000				576,500,000	545,000,000
Concentration risk, customer									0	0	0
Concentration risk, percentage									10.00%
Water Systems
Segment Reporting Information
Net sales to external customers									766,400,000	715,000,000	654,100,000
Operating income (loss)									131,300,000	124,100,000	105,300,000
Total assets	714,700,000				692,000,000				714,700,000	692,000,000
Depreciation									18,100,000	16,900,000	15,200,000
Amortization									6,000,000	5,700,000	4,200,000
Capital expenditures									31,000,000	25,200,000	13,800,000
Fueling Systems
Segment Reporting Information
Net sales to external customers									199,100,000	176,300,000	167,000,000
Operating income (loss)									42,600,000	36,600,000	31,300,000
Total assets	247,900,000				252,000,000				247,900,000	252,000,000
Depreciation									1,900,000	1,800,000	1,800,000
Amortization									1,900,000	1,500,000	1,700,000
Capital expenditures									4,000,000	3,300,000	1,800,000
Other
Segment Reporting Information
Net sales to external customers									0	0	0
Operating income (loss)									(50,100,000)	(47,700,000)	(43,200,000)
Total assets	89,300,000				32,400,000				89,300,000	32,400,000
Depreciation									3,400,000	2,400,000	2,400,000
Amortization									100,000	0	0
Capital expenditures									32,200,000	13,600,000	5,500,000
United States
Segment Reporting Information
Net sales to external customers									460,500,000	428,500,000	371,000,000
Long-lived assets	377,300,000				330,000,000				377,300,000	330,000,000
Foreign
Segment Reporting Information
Net sales to external customers									505,000,000	462,800,000	450,100,000
Long-lived assets	$ 199,200,000				$ 215,000,000				$ 199,200,000	$ 215,000,000