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Basis of Presentation and Recent Developments (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Apr. 30, 2020
USD ($)
Sep. 30, 2020
reporting_segment
Sep. 30, 2020
reportable_segment
Dec. 31, 2019
operating_segment
Sep. 30, 2019
Mar. 23, 2016
USD ($)
Debt [Line Items]            
Number of operating segments | operating_segment       4    
Number of reportable segments   2 3      
6.50% Notes due 2024 | Senior Notes            
Debt [Line Items]            
Debt Acquired $ 29,744,000          
Aggregate principal amount           $ 900,000,000
Interest rate, stated percentage         6.50% 6.50%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 73.90%          
Long-term Debt $ 21,999,000          
Long-term Debt, Accrued Interest 946,000          
Gain (Loss) on Extinguishment of Debt $ 7,388,000