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SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Jan. 03, 2015
Segment Reporting Information
Net sales to external customers	$ 225,728us-gaap_SalesRevenueNet	$ 231,421us-gaap_SalesRevenueNet
Operating income (loss)	15,867us-gaap_OperatingIncomeLoss	25,960us-gaap_OperatingIncomeLoss
Total assets	1,080,757us-gaap_Assets		1,075,887us-gaap_Assets
Water Systems
Segment Reporting Information
Net sales to external customers	179,200	184,600
Operating income (loss)	19,400	29,200
Total assets	761,600		757,500
Fueling Systems
Segment Reporting Information
Net sales to external customers	46,500	46,800
Operating income (loss)	9,600	9,100
Total assets	251,600		252,700
Other
Segment Reporting Information
Net sales to external customers	0	0
Operating income (loss)	(13,100)	(12,300)
Total assets	$ 67,600		$ 65,700