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Debt and Credit Facilities - Senior Notes and Amended and Restated Senior Secured Credit Facilities (Details) - USD ($)
Nov. 26, 2019
Mar. 31, 2020
Aug. 01, 2019
Debt Instrument [Line Items]      
Gain on settlement of interest rate swaps $ (600,000)    
Senior Notes due December 2027      
Debt Instrument [Line Items]      
Debt instrument face amount $ 425,000,000    
Debt interest rate 4.00% 4.00%  
Debt issuance costs capitalized $ 3,500,000    
6.50% Senior Notes due December 2020      
Debt Instrument [Line Items]      
Debt interest rate 6.50%    
Repurchased face amount $ 425,000,000    
Aggregate repurchase amount 452,000,000.0    
Premium on redemption of debt 15,500,000    
Accrued interest recognized 11,500,000    
Loss on debt redemption (16,100,000)    
Accelerated amortization of original issuance discount $ 1,200,000    
Third Amended and Restated Credit Agreement      
Debt Instrument [Line Items]      
Lender and third-party fees     $ 400,000
Third Amended and Restated Credit Agreement | Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving credit facilities     $ 475,000,000