RESTRUCTURING Details (USD $)	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 501,000	$ 2,935,000	$ 919,000	$ 5,100,000
Water Systems | Phase III | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expense	100,000		200,000
Water Systems | Phase III | Asset write-off
Restructuring Cost and Reserve [Line Items]
Restructuring expense	400,000		700,000
Maximum | Phase IV | Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	5,200,000
Maximum | Phase IV | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3,500,000
Minimum | Phase IV | Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2,600,000
Minimum | Phase IV | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	1,200,000
Phase IV | Man Hours Transfer
Restructuring Cost and Reserve [Line Items]
Manufacturing Activity, Man Hours	260,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserves	$ 100,000	$ 300,000	$ 100,000	$ 300,000