RESTRUCTURING (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Restructuring Cost and Reserve
Restructuring (income)/expense	$ 88,000	$ 553,000	$ 74,000	$ 1,473,000
Restructuring reserves	0	200,000	0	200,000
Water Systems
Restructuring Cost and Reserve
Restructuring (income)/expense		553,000		1,473,000
Phase IV
Restructuring Cost and Reserve
Restructuring (income)/expense	88,000		74,000
Phase IV | Restructuring Costs | Minimum
Restructuring Cost and Reserve
Restructuring and related cost, expected cost			2,600,000
Percentage of non-cash charges related to restructuring (as a percent)			50.00%
Phase IV | Restructuring Costs | Maximum
Restructuring Cost and Reserve
Restructuring and related cost, expected cost			5,200,000
Percentage of non-cash charges related to restructuring (as a percent)			60.00%
Phase IV | Facility Closing | Minimum
Restructuring Cost and Reserve
Restructuring and related cost, expected cost			1,200,000
Phase IV | Facility Closing | Maximum
Restructuring Cost and Reserve
Restructuring and related cost, expected cost			3,500,000
Phase IV | Equipment relocation
Restructuring Cost and Reserve
Restructuring (income)/expense	0		100,000
Phase IV | Asset write-off
Restructuring Cost and Reserve
Restructuring (income)/expense	100,000		300,000
Phase IV | Asset sale
Restructuring Cost and Reserve
Restructuring (income)/expense	0		(400,000)
Phase IV | Other
Restructuring Cost and Reserve
Restructuring (income)/expense	0		100,000
Phase IV | Man Hours Transfer
Restructuring Cost and Reserve
Manufacturing activity, man hours			260,000
Phase IV | Water Systems
Restructuring Cost and Reserve
Restructuring (income)/expense	100,000		100,000
Phase IV | Water Systems | Equipment relocation
Restructuring Cost and Reserve
Restructuring (income)/expense	0		100,000
Phase IV | Water Systems | Asset write-off
Restructuring Cost and Reserve
Restructuring (income)/expense	100,000		300,000
Phase IV | Water Systems | Asset sale
Restructuring Cost and Reserve
Restructuring (income)/expense	0		(400,000)
Phase IV | Water Systems | Other
Restructuring Cost and Reserve
Restructuring (income)/expense	0		100,000
Phase IV | Fueling Systems
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Fueling Systems | Equipment relocation
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Fueling Systems | Asset write-off
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Fueling Systems | Asset sale
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Fueling Systems | Other
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Other
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Other | Equipment relocation
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Other | Asset write-off
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Other | Asset sale
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Phase IV | Other | Other
Restructuring Cost and Reserve
Restructuring (income)/expense	$ 0		$ 0