Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 18,094	$ 17,126	$ 22,685
Reconciliation to cash flows:
Depreciation and amortization	12,605	10,248	8,458
Deferred income taxes	2,150	(2,985)	3,082
Pension withdrawal	0	7,210	0
Share-based compensation expense	1,322	1,621	1,350
Loss from property disposals	111	153	2
Changes in operating accounts (using) providing cash, net of effects of acquisition:
Trade receivables	(1,698)	2,149	(2,407)
Inventories	2,122	(573)	1,319
Accounts payable	335	(1,185)	(1,846)
Accrued liabilities	141	(1,319)	343
Income taxes	(2)	3,893	(251)
Other	(568)	(864)	947
Net cash provided by operating activities	34,612	35,474	33,682
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant, and equipment	(12,261)	(26,660)	(20,057)
Purchases of investments	(25,161)	(18,755)	(14,165)
Sale and maturities of investments	16,612	14,900	15,270
Proceeds from property disposals	115	233	255
Acquisitions	(2,416)	(100)	(1,709)
Net cash used in investing activities	(23,111)	(30,382)	(20,406)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(7,410)	(6,936)	(6,417)
Proceeds from Issuance of Common Stock	917	968	752
Stock options exercised	186	515	1,466
Excess tax benefit from share-based compensation	62	510	699
Shares surrendered for payroll taxes	(485)	0	(150)
Net cash used in financing activities	(6,730)	(4,943)	(3,650)
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,771	149	9,626
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	28,715	28,566	18,940
CASH AND CASH EQUIVALENTS, END OF PERIOD	33,486	28,715	28,566
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION-
Cash paid during the year for income taxes	7,757	6,900	10,788
Capital expenditures in accounts payable	$ 699	$ 1,401	$ 279