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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 19,214us-gaap_NetIncomeLoss	$ 18,094us-gaap_NetIncomeLoss	$ 17,126us-gaap_NetIncomeLoss
Unrealized gain (loss) on available-for-sale investments	11	(47)	12
Unrealized gain on post-retirement liability	1	109	5
Total other comprehensive income	12	62	17
Total comprehensive income	$ 19,226us-gaap_ComprehensiveIncomeNetOfTax	$ 18,156us-gaap_ComprehensiveIncomeNetOfTax	$ 17,143us-gaap_ComprehensiveIncomeNetOfTax

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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