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FAIR VALUE - Asset Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Mar. 30, 2019
Money market funds | Cash and Cash Equivalents
Fair Value
Investments at fair value	$ 29,500
Money market funds | Restricted Investments
Fair Value
Investments at fair value	800
Fixed Income | Restricted Investments
Fair Value
Investments at fair value	15,400
Mutual funds, equity and alternative investments | Investments
Fair Value
Investments at fair value	17,700
Money market and mutual funds | Other Assets
Fair Value
Investments at fair value	900
Ardellis Insurance Ltd.
Fair Value
Total Fair Value	33,139
Estimate of Fair Value Measurement | Recurring
Fair Value
Investments at fair value	64,344	$ 30,904
Assets at fair value	64,344	30,904
Estimate of Fair Value Measurement | Recurring | Money market funds
Fair Value
Investments at fair value	30,398	605
Estimate of Fair Value Measurement | Recurring | Fixed Income
Fair Value
Investments at fair value	15,361	13,623
Estimate of Fair Value Measurement | Recurring | Equity
Fair Value
Investments at fair value	9,089	8,258
Estimate of Fair Value Measurement | Recurring | Alternative Investments
Fair Value
Investments at fair value	1,960	1,782
Estimate of Fair Value Measurement | Recurring | Mutual Fund
Fair Value
Investments at fair value	7,536	6,636
Estimate of Fair Value Measurement | Recurring | Domestic stock funds
Fair Value
Investments at fair value	5,204	2,151
Estimate of Fair Value Measurement | Recurring | International stock funds
Fair Value
Investments at fair value	947	2,085
Estimate of Fair Value Measurement | Recurring | Target funds
Fair Value
Investments at fair value	242	257
Estimate of Fair Value Measurement | Recurring | Bond funds
Fair Value
Investments at fair value	222	799
Estimate of Fair Value Measurement | Recurring | Alternative funds
Fair Value
Investments at fair value	921	1,344
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value
Investments at fair value	46,423	18,810
Assets at fair value	46,423	18,810
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds
Fair Value
Investments at fair value	29,561	56
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Fixed Income
Fair Value
Investments at fair value	237	3,860
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Equity
Fair Value
Investments at fair value	9,089	8,258
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Mutual Fund
Fair Value
Investments at fair value	7,536	6,636
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Domestic stock funds
Fair Value
Investments at fair value	5,204	2,151
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | International stock funds
Fair Value
Investments at fair value	947	2,085
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Target funds
Fair Value
Investments at fair value	242	257
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Bond funds
Fair Value
Investments at fair value	222	799
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Alternative funds
Fair Value
Investments at fair value	921	1,344
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2)
Fair Value
Investments at fair value	15,961	10,312
Assets at fair value	15,961	10,312
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Money market funds
Fair Value
Investments at fair value	837	549
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Fixed Income
Fair Value
Investments at fair value	15,124	9,763
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3)
Fair Value
Investments at fair value	1,960	1,782
Assets at fair value	1,960	1,782
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) | Alternative Investments
Fair Value
Investments at fair value	$ 1,960	$ 1,782

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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