FAIR VALUE - Asset Measured at Fair Value (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Mar. 28, 2017	Mar. 26, 2016
Collateral Trust Account | Other Assets
Fair Value
Investments		$ 4,100
Collateral Trust Account | Restricted Cash
Fair Value
Investments		$ 3,800
Estimate of Fair Value Measurement | Recurring
Fair Value
Investments	$ 15,457		$ 10,665
Estimate of Fair Value Measurement | Recurring | Money market funds
Fair Value
Investments	4,628		3,207
Estimate of Fair Value Measurement | Recurring | Fixed Income
Fair Value
Investments	4,055		3,157
Estimate of Fair Value Measurement | Recurring | Equity
Fair Value
Investments	5,928		3,233
Estimate of Fair Value Measurement | Recurring | Domestic stock
Fair Value
Investments	316		598
Estimate of Fair Value Measurement | Recurring | International stock funds
Fair Value
Investments	81		62
Estimate of Fair Value Measurement | Recurring | Target funds
Fair Value
Investments	246		216
Estimate of Fair Value Measurement | Recurring | Bond funds
Fair Value
Investments	203		192
Estimate of Fair Value Measurement | Recurring | Mutual Funds
Fair Value
Investments	846		1,068
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value
Investments	10,893		5,540
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds
Fair Value
Investments	64		65
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Fixed Income
Fair Value
Investments	4,055		1,174
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Equity
Fair Value
Investments	5,928		3,233
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Domestic stock
Fair Value
Investments	316		598
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | International stock funds
Fair Value
Investments	81		62
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Target funds
Fair Value
Investments	246		216
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Bond funds
Fair Value
Investments	203		192
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Mutual Funds
Fair Value
Investments	846		1,068
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2)
Fair Value
Investments	4,564		5,125
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Money market funds
Fair Value
Investments	$ 4,564		3,142
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Fixed Income
Fair Value
Investments			$ 1,983