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Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values (Details) - USD ($)
$ in Thousands
Dec. 30, 2018
Mar. 31, 2018
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative asset $ 1,013 $ 22
Notes 300,000 300,000
Derivative liability 0 3,877
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative asset 1,013 22
Notes 291,000 304,500
Derivative liability $ 0 $ 3,877