RESTRUCTURING (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Restructuring Cost and Reserve
Restructuring (income)/expense	$ 697,000	$ 59,000	$ 1,407,000	$ (14,000)
Restructuring reserve	300,000	0	300,000	0
Siloam Springs
Restructuring Cost and Reserve
Restructuring (income)/expense				400,000
Asset sale
Restructuring Cost and Reserve
Restructuring (income)/expense				(400,000)
Employee severance
Restructuring Cost and Reserve
Restructuring (income)/expense	200,000		900,000
Other restructuring
Restructuring Cost and Reserve
Restructuring (income)/expense	500,000		500,000
Water Systems
Restructuring Cost and Reserve
Restructuring (income)/expense	500,000		1,000,000
Water Systems | Employee severance
Restructuring Cost and Reserve
Restructuring (income)/expense	0		500,000
Water Systems | Other restructuring
Restructuring Cost and Reserve
Restructuring (income)/expense	500,000		500,000
Fueling Systems
Restructuring Cost and Reserve
Restructuring (income)/expense	200,000		400,000
Fueling Systems | Employee severance
Restructuring Cost and Reserve
Restructuring (income)/expense	200,000		400,000
Fueling Systems | Other restructuring
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Other
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Other | Employee severance
Restructuring Cost and Reserve
Restructuring (income)/expense	0		0
Other | Other restructuring
Restructuring Cost and Reserve
Restructuring (income)/expense	$ 0		$ 0