Annual report pursuant to Section 13 and 15(d)

Borrowings (Details)

v3.10.0.1
Borrowings (Details) - USD ($)
Dec. 30, 2018
Dec. 31, 2017
Apr. 16, 2017
Jun. 30, 2016
Debt Instrument [Line Items]        
Debt and capital lease obligations $ 203,575,000 $ 277,313,000    
Less: Current portion (786,000) (741,000)    
Long-term debt and capital lease obligations 202,789,000 276,572,000    
New Credit Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity       $ 20,000,000
Revolving credit facility | New Credit Facility        
Debt Instrument [Line Items]        
Amounts outstanding 192,500,000      
Maximum borrowing capacity       400,000,000
Debt and capital lease obligations $ 193,375,000 $ 266,375,000    
Weighted Average Interest Rate 3.20% 3.50%    
Capital lease obligations        
Debt Instrument [Line Items]        
Debt and capital lease obligations $ 10,200,000 $ 10,938,000    
Weighted Average Interest Rate 4.60% 4.68%    
Letter of credit | New Credit Facility        
Debt Instrument [Line Items]        
Amounts outstanding $ 7,800,000      
Maximum borrowing capacity       25,000,000
Swingline loans | New Credit Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity       $ 15,000,000
Other assets, net | New Credit Facility        
Debt Instrument [Line Items]        
Debt Issuance Costs, Net     $ 700,000