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Long-Term Incentive Compensation (Summary of Equity-Classified Stock Option Activity) (Details) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares      
Number of Options, Outstanding at January 1 (in shares) 3,850 4,635 5,178
Number of Options, Granted (in shares) 0 0 0
Number of Options, Exercised (in shares) 0 0 0
Number of Options, Forfeited or expired (in shares) (844) (785) (543)
Number of Options, Outstanding at December 31 (in shares) 3,006 3,850 4,635
Weighted Average Exercise Price      
Weighted Average Exercise Price, Outstanding at January 1 (in dollars per share) $ 13.39 $ 15.26 $ 17.06
Weighted Average Exercise Price, Granted (in dollars per share) 0 0 0
Weighted Average Exercise Price, Exercised (in dollars per share) 0 0 0
Weighted Average Exercise Price, Forfeited or expired (in dollars per share) 29.10 24.46 32.38
Weighted Average Exercise Price, Outstanding at December 31 (in dollars per share) $ 8.98 $ 13.39 $ 15.26