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DEBT - Narrative (Details)
3 Months Ended 6 Months Ended
Sep. 09, 2019
USD ($)
property
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
CAD ($)
Dec. 31, 2020
USD ($)
Sep. 09, 2019
CAD ($)
property
Debt Instrument [Line Items]                
Loss on extinguishment of debt   $ 54,000 $ 392,000 $ 847,000 $ 392,000      
Interest expense   24,270,000 25,292,000 48,713,000 50,996,000      
Non-cash interest expense   1,700,000 $ 2,200,000 3,645,000 $ 4,458,000      
Accrued interest   16,100,000   16,100,000     $ 16,100,000  
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility                
Debt Instrument [Line Items]                
Borrowing capacity $ 1,000,000,000.0              
Borrowing capacity in certain foreign currencies (up to) $ 175,000,000.0              
Number of extension options | property 2             2
Extension period 6 months              
Amount outstanding under credit facility   0   0        
Available borrowing capacity   $ 1,000,000,000.0   $ 1,000,000,000.0        
Interest rate   1.20%   1.20%   1.20%    
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Minimum                
Debt Instrument [Line Items]                
Annum percent unused borrowing fee 0.125%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Maximum                
Debt Instrument [Line Items]                
Annum percent unused borrowing fee 0.30%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Prime Rate                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.50%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Base Rate                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.00%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Base Rate | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.00%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | Base Rate | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.45%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.775%              
Fifth Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.45%              
Fifth Amended and Restated Credit Agreement | Line of Credit                
Debt Instrument [Line Items]                
Borrowing capacity $ 2,750,000,000              
Senior Notes                
Debt Instrument [Line Items]                
Aggregate principal amount   $ 1,250,000,000   $ 1,250,000,000     $ 1,250,000,000  
Senior Notes | 4.80% senior unsecured notes due 2024 (“2024 Notes”)                
Debt Instrument [Line Items]                
Interest rate   4.80%   4.80%   4.80%    
Senior Notes | 3.90% senior unsecured notes due 2029 (“2029 Notes”)                
Debt Instrument [Line Items]                
Interest rate   3.90%   3.90%   3.90%    
Senior Notes | 5.125% senior unsecured notes due 2026 (“2026 Notes”)                
Debt Instrument [Line Items]                
Interest rate   5.125%   5.125%   5.125%    
Senior Notes | 5.88% senior unsecured notes due 2027 (“2027 Notes”)                
Debt Instrument [Line Items]                
Interest rate   5.88%   5.88%   5.88%    
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement                
Debt Instrument [Line Items]                
Aggregate principal amount $ 845,000,000.0              
Loss on extinguishment of debt   $ 100,000   $ 800,000        
Interest rate   1.35%   1.35%   1.35%    
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | Interest Rate Swap                
Debt Instrument [Line Items]                
Aggregate principal amount   $ 845,000,000.0   $ 845,000,000.0        
Fixed interest rate under swap   1.37%   1.37%   1.37%    
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | Base Rate | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.00%              
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | Base Rate | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.65%              
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | LIBOR | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.85%              
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | LIBOR | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.65%              
U.S. Dollar Term Loan | Fifth Amended and Restated Credit Agreement | Initial redemption period                
Debt Instrument [Line Items]                
Aggregate principal amount $ 345,000,000.0              
Canadian Dollar Term Loan | Fifth Amended and Restated Credit Agreement                
Debt Instrument [Line Items]                
Aggregate principal amount           $ 125,000,000.0   $ 125,000,000.0
Interest rate   1.66%   1.66%   1.66%    
Canadian Dollar Term Loan | Fifth Amended and Restated Credit Agreement | Interest Rate Swap                
Debt Instrument [Line Items]                
Aggregate principal amount           $ 125,000,000.0    
Fixed interest rate under swap   1.10%   1.10%   1.10%    
Canadian Dollar Term Loan | Fifth Amended and Restated Credit Agreement | CDOR | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.85%              
Canadian Dollar Term Loan | Fifth Amended and Restated Credit Agreement | CDOR | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.65%