SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 29, 2012
Segment Reporting Information
Net sales to external customers	$ 263,443	$ 246,696	$ 485,967	$ 448,619
Operating income (loss)	40,706	37,510	63,872	58,506
Total assets	1,016,134		1,016,134		976,379
Water Systems
Segment Reporting Information
Net sales to external customers	213,700	202,800	390,200	367,800
Operating income (loss)	42,700	40,100	71,400	66,800
Total assets	726,500		726,500		692,000
Fueling Systems
Segment Reporting Information
Net sales to external customers	49,700	43,900	95,800	80,800
Operating income (loss)	10,800	9,000	17,100	14,600
Total assets	256,300		256,300		252,000
Other
Segment Reporting Information
Net sales to external customers	0	0	0	0
Operating income (loss)	(12,800)	(11,600)	(24,600)	(22,900)
Total assets	$ 33,300		$ 33,300		$ 32,400