CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Apr. 02, 2016
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 685	$ 1,039
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	111,811	107,910
Finite-Lived Intangible Assets, Accumulated Amortization	$ 21,979	$ 21,146
Preferred stock, without par value	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, without par value	$ 0	$ 0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, issued	33,151,000	31,613,000
Common stock, outstanding	33,151,000	31,613,000