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Pension Plan (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 16, 2018
USD ($)
Dec. 28, 2019
USD ($)
Dec. 29, 2018
USD ($)
Dec. 28, 2019
USD ($)
Dec. 29, 2018
USD ($)
Mar. 31, 2018
Participant
Retirement Benefits [Abstract]            
Number of pension plan participants authorized to terminate from Scheme | Participant           60
Contribution paid $ 11,000          
U.K. pension settlement   $ 0 $ 13,768 $ 0 $ 13,768  
Tax credit         $ 2,600