Revolving Credit Facilities and Long-Term Debt - Revolving Credit Facilities and Long-Term Debt (Details)					12 Months Ended
	Jun. 06, 2019 USD ($)	May 15, 2018 USD ($)	Jun. 02, 2017 USD ($)	Jun. 29, 2015 USD ($)	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 29, 2018	May 26, 2017 USD ($)
Interest expense
Revolving credit facilities and long-term debt
Amortization of deferred loan fees					$ 900,000	$ 1,200,000
February 2015 Wells Fargo Bank credit facility
Revolving credit facilities and long-term debt
Existing indebtedness refinanced				$ 150,000,000.0
Golub Term Loan
Revolving credit facilities and long-term debt
Principal amount	$ 111,500,000			$ 200,000,000.0
Interest expense					$ 8,500,000	$ 12,500,000	$ 11,200,000
Weighted average interest rate (as a percent)					6.80%	7.00%	5.90%
Periodic payment					$ 500,000
Additional interest rate required if certain triggering events come into existence (as a percent)				2.00%
Deferred loan fees				$ 7,100,000	2,500,000	$ 2,200,000
Term loan					111,500,000	176,500,000
Unamortized value of the debt issuance costs and debt discount					(2,478,000)	(2,236,000)
Total					109,022,000	174,264,000
Repayments of loan	65,000,000.0	$ 10,000,000.0	$ 10,000,000.0
Golub Term Loan | Base rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				3.50%
Golub Term Loan | Federal funds rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				0.50%
Golub Term Loan | One-month LIBOR rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				1.00%
Golub Term Loan | LIBOR
Revolving credit facilities and long-term debt
Basis margin (as a percent)				4.50%
Golub Term Loan | Minimum | LIBOR
Revolving credit facilities and long-term debt
Interest rate (as a percent)				1.00%
Golub Term Loan | Leverage ratio as of December 2018 | Maximum
Revolving credit facilities and long-term debt
Consolidated total net leverage ratio								4.00
Wells Fargo Revolver
Revolving credit facilities and long-term debt
Borrowing capacity	$ 165,000,000.0			$ 125,000,000.0					$ 135,000,000.0
Commitment fee on unused capacity (as a percentage)				0.25%
Amount outstanding under 2015 Wells Fargo Revolver					129,900,000	0
Interest expense					$ 3,100,000	$ 1,800,000	$ 1,900,000
Weighted average interest rate (as a percent)					3.30%	3.40%	2.50%
Additional interest rate required if certain triggering events come into existence (as a percent)				2.00%
Deferred loan fees				$ 1,200,000	$ 400,000	$ 300,000
Wells Fargo Revolver | Federal funds rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				0.50%
Wells Fargo Revolver | One-month LIBOR rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				1.00%
Wells Fargo Revolver | Minimum
Revolving credit facilities and long-term debt
Consolidated fixed charge coverage ratio				1.00
Wells Fargo Revolver | Minimum | Base rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				0.00%
Wells Fargo Revolver | Minimum | LIBOR
Revolving credit facilities and long-term debt
Basis margin (as a percent)				1.00%
Wells Fargo Revolver | Maximum | Base rate
Revolving credit facilities and long-term debt
Basis margin (as a percent)				0.25%
Wells Fargo Revolver | Maximum | LIBOR
Revolving credit facilities and long-term debt
Basis margin (as a percent)				1.25%