XML 84 R62.htm IDEA: XBRL DOCUMENT v3.20.4
Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Parenthetical) (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Bank Credit Facility – matures May 2022    
Debt Instrument [Line Items]    
Senior notes, maturity date May 10, 2022 May 10, 2022
11.00% Second-Priority Senior Secured Notes – due April 2022    
Debt Instrument [Line Items]    
Debt instrument interest rate 11.00% 11.00%
Senior notes, maturity date Apr. 03, 2022 Apr. 03, 2022
7.50% Senior Notes – due May 2022    
Debt Instrument [Line Items]    
Debt instrument interest rate 7.50% 7.50%
Senior notes, maturity date May 31, 2022 May 31, 2022