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Senior Credit Facility - Credit Agreement (Details) - USD ($)
 3 Months Ended
Mar. 30, 2019
Dec. 29, 2018
Mar. 31, 2018
Jun. 15, 2017
Feb. 19, 2016
Mar. 30, 2019
Line of Credit Facility [Line Items]            
Unsecured Debt $ 628,300,000 $ 408,750,000 $ 706,300,000     $ 628,300,000
Debt Issuance Costs, Gross (1,300,000) (1,400,000) (1,700,000)     (1,300,000)
Unsecured debt, net of debt issuance costs 627,000,000 407,400,000 704,600,000     627,000,000
Unsecured Debt, Current (21,250,000) (26,250,000) (25,000,000)     (21,250,000)
Long-term Debt, Excluding Current Maturities 605,695,000 381,100,000 679,565,000     605,695,000
Letters of Credit Outstanding, Amount 35,400,000 33,500,000 42,800,000     35,400,000
Term Loan, Maximum Borrowing Capacity       $ 100,000,000 $ 200,000,000  
Senior credit facility, maximum borrowing capacity $ 500,000,000       500,000,000 500,000,000
Swingline Loan, Maximum Borrowing Capacity           $ 50,000,000
Debt instrument, basis spread on variable rate           0.75%
Commitment fee for unused capacity 0.125%          
Debt Instrument, Interest Rate, Stated Percentage - June 2017 Term Loan 1.00%         1.00%
Compensating Balance, Amount $ 0         $ 0
Debt Instrument, Covenant Compliance all          
Base Rate            
Line of Credit Facility [Line Items]            
Line of Credit Facility, Interest Rate at Period End 5.50%         5.50%
London Interbank Offered Rate (LIBOR)            
Line of Credit Facility [Line Items]            
Line of Credit Facility, Interest Rate at Period End 2.495%         2.495%
Minimum            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate           0.50%
Commitment fee for unused capacity           0.075%
Maximum            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate           1.125%
Commitment fee for unused capacity           0.20%
February 2016 Term Loan [Member]            
Line of Credit Facility [Line Items]            
Term loan, Maximum Month End Outstanding Amount $ 155,000,000 165,000,000 175,000,000     $ 155,000,000
Term Loan, Maximum Borrowing Capacity         $ 200,000,000  
Debt Instrument, Maturity Date Feb. 19, 2022          
Due in years one and two February 2016 Term Loan [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Amount of Periodic Payment           10000000
Due in years three through Maturity February 2016 Term Loan [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Amount of Periodic Payment           20000000
June 2017 Term Loan [Member]            
Line of Credit Facility [Line Items]            
Term loan, Maximum Month End Outstanding Amount $ 91,300,000 93,800,000 96,300,000     $ 91,300,000
Term Loan, Maximum Borrowing Capacity       $ 100,000,000    
Debt Instrument, Maturity Date Jun. 15, 2022          
Due in years one and two June 2017 Term Loan [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Amount of Periodic Payment           5000000
Due in years three through five June 2017 Term Loan [Member] [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Amount of Periodic Payment           10000000
Number of Financial Covenants [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Covenant Description           2
2016 Senior Credit Facility [Member]            
Line of Credit Facility [Line Items]            
Line of Credit Facility, Maximum Month-end Outstanding Amount   $ 0 $ 285,000,000     $ 232,000,000
Fixed Charge Coverage Ratio Minimum Requirement [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Covenant Description           2.00
Leverage Ratio Maximum Requirement [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Covenant Description           4.00