Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Additional Information (Details)

v3.19.1
Borrowings - Additional Information (Details) - USD ($)
Apr. 21, 2019
Dec. 30, 2018
Jun. 30, 2016
Borrowings      
Long-term debt $ 183,375,000 $ 193,375,000  
Loan origination costs 1,500,000 1,700,000  
Credit Facility | Revolving credit facility      
Borrowings      
Amounts outstanding   192,500,000  
Credit Facility | Letter of credit      
Borrowings      
Amounts outstanding   $ 7,800,000  
Credit Facility | Line of credit      
Borrowings      
Amounts outstanding 182,500,000    
Credit Facility | Revolving credit facility      
Borrowings      
Maximum borrowing capacity     $ 400,000,000
Credit Facility | Letter of credit | Line of credit      
Borrowings      
Maximum borrowing capacity     25,000,000
Amounts outstanding $ 7,400,000    
Credit Facility | Swingline loans | Line of credit      
Borrowings      
Maximum borrowing capacity     $ 15,000,000