Goodwill and Intangible Assets-Goodwill Rollforward (Details) $ in Thousands	12 Months Ended
	Apr. 01, 2018 USD ($) Segment	Apr. 02, 2017 USD ($)
Goodwill [Line Items]
Number of Reportable Segments | Segment	3
Goodwill, beginning of period	$ 97,556	$ 97,724
Goodwill, Period Increase (Decrease)	(39,116)	(168)
Goodwill, end of period	58,440	97,556
Industrial [Member]
Goodwill [Line Items]
Goodwill, beginning of period	6,495	6,495
Goodwill, Period Increase (Decrease)	0	0
Goodwill, end of period	6,495	6,495
Water Treatment [Member]
Goodwill [Line Items]
Goodwill, beginning of period	7,000	7,000
Goodwill, Period Increase (Decrease)	0	0
Goodwill, end of period	7,000	7,000
Health and Nutrition [Member]
Goodwill [Line Items]
Goodwill, beginning of period	84,061	84,229
Goodwill, Period Increase (Decrease)	(39,116)	(168)
Goodwill, end of period	$ 44,945	$ 84,061