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Debt, Lease and Other Commitments - Additional Information (Detail) - USD ($)
12 Months Ended
Sep. 27, 2018
Nov. 29, 2017
Sep. 28, 2016
Jan. 01, 2016
Apr. 21, 2015
Apr. 03, 2012
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Jul. 17, 2013
Debt Instrument [Line Items]                      
Bank overdraft             $ 10,550,000 $ 5,699,000      
Debt instrument face amount             808,750,000 812,500,000      
Payments for debt issuance costs             $ 100,000 729,000 $ 4,380,000    
Lease arrangements expiration period             18 years        
Deferred Salaries                      
Debt Instrument [Line Items]                      
Percentage of amount deferred, maximum       75.00%           75.00%  
Deferred Bonus                      
Debt Instrument [Line Items]                      
Percentage of amount deferred, maximum                   100.00%  
Minimum                      
Debt Instrument [Line Items]                      
Lease term             2 years        
Operating lease period             1 month        
Maximum                      
Debt Instrument [Line Items]                      
Lease term             26 years        
Operating lease period             10 years        
2026 Notes                      
Debt Instrument [Line Items]                      
Debt instrument face amount     $ 400,000,000       $ 400,000,000 400,000,000      
Notes due year             Oct. 01, 2026        
Price to redeem notes as a percentage of principal     100.00%                
Variable interest rate     0.30%                
Change of control triggering event price to redeem notes as a percentage of principal             101.00%        
Balance of unamortized financing costs             $ 5,742,000        
Debt discount             2,108,000        
2022 Notes                      
Debt Instrument [Line Items]                      
Debt instrument face amount           $ 400,000,000 $ 400,000,000 400,000,000      
Notes due year             Apr. 01, 2022        
Price to redeem notes as a percentage of principal           100.00%          
Variable interest rate           0.35%          
Change of control triggering event price to redeem notes as a percentage of principal             101.00%        
Debt discount             $ 300,000        
Payments Of Financing Costs             3,900,000        
Standby Letters Of Credit                      
Debt Instrument [Line Items]                      
Line of credit facility outstanding daily balance during period             $ 8,400,000 8,700,000      
Accounts Receivable Securitization Facility                      
Debt Instrument [Line Items]                      
Line of credit facility outstanding daily balance during period               0      
Line of credit facility, maximum borrowing capacity $ 200,000,000                   $ 150,000,000
Line of credit extended term 1 year                    
Line of credit facility, expiration date             Sep. 27, 2020        
Debt instrument covenant compliance             As of December 29, 2018 and December 30, 2017, respectively, the company was in compliance with all restrictive covenants under the facility.        
Line of credit facility, amount available             $ 1,300,000        
Basis spread on variable rate             0.85%        
Unused borrowing fee             0.30%        
Balance of unamortized financing costs             $ 200,000 200,000      
Unsecured Credit Facility                      
Debt Instrument [Line Items]                      
Line of credit facility outstanding daily balance during period               $ 0      
Line of credit facility, maximum borrowing capacity   $ 700,000,000         500,000,000        
Line of credit facility, expiration date               Nov. 29, 2022      
Line of credit facility, amount available             491,600,000        
Line of credit facility, expiration period         5 years            
Line of credit facility, amount available   500,000,000                  
Line of credit facility, additional borrowing capacity   $ 200,000,000                  
Covenant, maximum leverage ratio   4.00                  
Minimum leverage ratio on covenant holiday   3.75                  
Payments for debt issuance costs   $ 600,000                  
Unsecured Credit Facility | Maximum                      
Debt Instrument [Line Items]                      
Line of credit facility outstanding daily balance during period             $ 4,900,000        
Unsecured Credit Facility | Base Rate Loans | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   0.00%     0.00%            
Unsecured Credit Facility | Base Rate Loans | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   0.575%     0.75%            
Unsecured Credit Facility | Eurodollar Loans | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   0.575%     0.70%            
Unsecured Credit Facility | Eurodollar Loans | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   1.575%     1.75%            
Unsecured Credit Facility | Federal Funds Rate | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   0.05%     0.05%            
Unsecured Credit Facility | Federal Funds Rate | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate   0.30%     0.50%