XML 42 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1
Senior Credit Facility - Credit Agreement (Details) - USD ($)
 3 Months Ended
Apr. 01, 2017
Dec. 31, 2016
Mar. 26, 2016
Feb. 19, 2016
Apr. 01, 2017
Line of Credit Facility [Line Items]          
Senior credit facility, maximum borrowing capacity $ 500,000,000     $ 500,000,000 $ 500,000,000
Swingline Loan, Maximum Borrowing Capacity       50,000,000 50,000,000
Debt Issuance Costs, Gross $ 1,100,000 $ 1,100,000 $ 1,400,000   1,100,000
Term Loan, Maximum Borrowing Capacity       200,000,000 200,000,000
Debt Instrument, Maturity Date Feb. 19, 2021        
Letters of Credit Outstanding, Amount $ 39,500,000 44,300,000 47,600,000   $ 39,500,000
Debt instrument, basis spread on variable rate 0.75%        
Commitment fee for unused capacity 0.13%        
Base Rate          
Line of Credit Facility [Line Items]          
Line of Credit Facility, Interest Rate Description .04        
London Interbank Offered Rate (LIBOR)          
Line of Credit Facility [Line Items]          
Line of Credit Facility, Interest Rate Description .0098278        
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%
Swingline loan [Member]          
Line of Credit Facility [Line Items]          
Swingline Loan, Maximum Borrowing Capacity       30,000,000  
2016 Senior Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Term loan, Maximum Month End Outstanding Amount $ 188,000,000 190,000,000 200,000,000   $ 188,000,000
Senior credit facility [Member]          
Line of Credit Facility [Line Items]          
Senior credit facility, maximum borrowing capacity       $ 400,000,000  
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 425,000,000 85,000,000 50,000,000    
Unsecured Debt 612,500,000 $ 275,000,000 $ 250,000,000   $ 612,500,000
Compensating Balance, Amount $ 0       $ 0
Debt Instrument, Covenant Compliance all        
Due in years one and two [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Frequency of Periodic Payment         10
Due in years three through five [Member]          
Line of Credit Facility [Line Items]          
Debt Instrument, Frequency of Periodic Payment         20
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