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Revolving Credit Facilities and Long-Term Debt - Revolving Credit Facilities and Long-Term Debt (Details)
3 Months Ended 9 Months Ended
Jun. 06, 2019
USD ($)
May 15, 2018
USD ($)
Jun. 02, 2017
USD ($)
Jun. 29, 2015
USD ($)
Dec. 28, 2019
USD ($)
Dec. 29, 2018
USD ($)
Dec. 28, 2019
USD ($)
Dec. 29, 2018
USD ($)
Mar. 30, 2019
USD ($)
May 26, 2017
USD ($)
Interest expense                    
Revolving credit facilities and long-term debt                    
Amortization of deferred loan fees         $ 200,000 $ 300,000 $ 700,000 $ 900,000    
Golub Term Loan                    
Revolving credit facilities and long-term debt                    
Principal amount $ 111,500,000     $ 200,000,000.0            
Interest expense         $ 1,900,000 $ 3,100,000 $ 6,700,000 $ 9,300,000    
Weighted average interest rate (as a percent)         6.60% 6.90% 6.60% 6.90%    
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            
Term loan         $ 111,500,000   111,500,000   $ 176,500,000  
Unamortized value of the debt issuance costs and debt discount         (2,668,000)   (2,668,000)   (2,236,000)  
Total         108,832,000   108,832,000   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         45,000,000.0   45,000,000.0   0  
Interest expense         $ 900,000 $ 400,000 $ 2,400,000 $ 1,500,000    
Weighted average interest rate (as a percent)         3.20% 3.60% 3.20% 3.60%    
Additional interest rate required if certain triggering events come into existence (as a percent)       2.00%            
Deferred loan fees       $ 1,200,000            
Unamortized value of the debt issuance costs and debt discount         $ (400,000)   $ (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%