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Debt and Credit Facilities - Senior Notes (Details) - USD ($)
1 Months Ended 12 Months Ended
Nov. 26, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]        
Loss on debt redemption and refinancing activities   $ 16,100,000 $ 1,900,000 $ 0
Gain on settlement of interest rate swaps   $ (600,000)    
4.00% Senior Notes due December 2027        
Debt Instrument [Line Items]        
Debt instrument face amount $ 425,000,000      
Debt interest rate 4.00% 4.00%    
Extinguishment of debt, amount $ 425,000,000      
Aggregate value of debt redeemed 452,000,000.0      
Premium paid on redemption of debt 15,500,000      
Redemption accrued interest recognized 11,500,000      
Loss on debt redemption and refinancing activities 16,100,000      
Accelerated amortization non-lender fees 1,200,000      
Debt issuance costs $ 3,500,000      
6.50% Senior Notes due December 2020        
Debt Instrument [Line Items]        
Debt interest rate 6.50% 6.50% 6.50%  
Extinguishment of debt, amount $ 425,000,000