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Debt Obligations - Senior Unsecured Revolving Credit Facility (Details)
1 Months Ended 9 Months Ended
Aug. 22, 2017
USD ($)
Tranche
Jan. 31, 2018
USD ($)
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Nov. 01, 2017
USD ($)
Apr. 01, 2017
USD ($)
Debt Instrument [Line Items]            
Long-term debt     $ 992,500,000     $ 133,100,000
Debt issuance costs     5,400,000     0
Repayments of debt     1,222,100,000 $ 199,600,000    
Letter of credit outstanding     4,400,000      
Unsecured debt | Term Loan Facility            
Debt Instrument [Line Items]            
Number of loan tranches | Tranche 2          
Additional maximum borrowing capacity $ 500,000,000.0          
Aggregate principal amount         $ 1,000,000,000.000  
Long-term debt     548,200,000      
Periodic payment percentage 2.50%          
Debt issuance costs     1,800,000      
Unsecured debt | Term Loan Facility | Subsequent event            
Debt Instrument [Line Items]            
Repayments of debt   $ 210,000,000        
Unsecured debt | Term Loan Facility | Minimum            
Debt Instrument [Line Items]            
Commitment fee percentage 0.10%          
Unsecured debt | Term Loan Facility | Maximum            
Debt Instrument [Line Items]            
Commitment fee percentage 0.25%          
Senior Unsecured Revolving Credit Facility | 2017 Credit Facility | FRBNY rate            
Debt Instrument [Line Items]            
Interest rate margin 0.50%          
Senior Unsecured Revolving Credit Facility | 2017 Credit Facility | One-Month LIBOR            
Debt Instrument [Line Items]            
Interest rate margin 1.00%          
Senior Unsecured Revolving Credit Facility | 2017 Credit Facility | Canadian Prime Rate            
Debt Instrument [Line Items]            
Interest rate margin 1.00%          
Senior Unsecured Revolving Credit Facility | 2017 Credit Facility | One-month CDOR            
Debt Instrument [Line Items]            
Interest rate margin 0.10%          
Senior Unsecured Revolving Credit Facility | Line of credit | 2017 Credit Facility            
Debt Instrument [Line Items]            
Initiation date Aug. 22, 2017          
Maximum borrowing capacity (up to) $ 1,000,000,000          
Expiration date Aug. 22, 2022          
Adjusted leverage ratio (no greater than) 3.5          
Line of credit, current obligations     0      
Amount available for future borrowings     988,700,000      
Senior Unsecured Revolving Credit Facility | Line of credit | 2017 Credit Facility | Minimum            
Debt Instrument [Line Items]            
Commitment fee percentage 0.10%          
Senior Unsecured Revolving Credit Facility | Line of credit | 2017 Credit Facility | Maximum            
Debt Instrument [Line Items]            
Commitment fee percentage 0.25%          
Senior Unsecured Revolving Credit Facility | Line of credit | 2015 Credit Facility            
Debt Instrument [Line Items]            
Line of credit, current obligations           $ 127,300,000.0
Stand-by Letters of Credit | 2017 Credit Facility            
Debt Instrument [Line Items]            
Letter of credit outstanding     $ 11,300,000      
Letter of Credit | Line of credit | 2017 Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity (up to) $ 75,000,000          
Bridge loan | Line of credit | 2017 Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity (up to) 50,000,000          
Third anniversary of initial borrowing | Unsecured debt | Term Loan Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity (up to) 600,000,000.0          
Fifth anniversary of initial borrowing | Unsecured debt | Term Loan Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity (up to) $ 400,000,000.0