Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Additional Information (Details)

v3.5.0.2
Borrowings - Additional Information (Details) - USD ($)
Jun. 30, 2016
Jul. 10, 2016
Dec. 27, 2015
Borrowings      
Loan origination costs   $ 2,500,000 $ 1,700,000
New Credit Facility | Revolving line of credit      
Borrowings      
Maximum borrowing capacity $ 400,000,000    
Additional borrowing capacity subject to lender participation 100,000,000    
New Credit Facility | Letter of credit | Line of credit      
Borrowings      
Maximum borrowing capacity 25,000,000    
New Credit Facility | Swingline loans | Line of credit      
Borrowings      
Maximum borrowing capacity 15,000,000    
New Credit Facility | Canadian dollar borrowing equivalent | Line of credit      
Borrowings      
Maximum borrowing capacity $ 20,000,000    
Credit Facility | Letter of credit      
Borrowings      
Amounts outstanding     7,900,000
Credit Facility | Line of credit      
Borrowings      
Amounts outstanding   292,500,000  
Credit Facility | Revolving line of credit      
Borrowings      
Amounts outstanding     $ 202,000,000
Credit Facility | Revolving line of credit | Federal Funds Rate      
Borrowings      
Interest rate margin (as a percent) 0.50%    
Credit Facility | Revolving line of credit | LIBOR      
Borrowings      
Interest rate margin (as a percent) 1.00%    
Credit Facility | Revolving line of credit | Canadian Dealer Offered Rate (CDOR)      
Borrowings      
Interest rate margin (as a percent) 1.00%    
Credit Facility | Letter of credit | Line of credit      
Borrowings      
Amounts outstanding   $ 8,500,000