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Stock-Based Compensation (Summary of Unit Activity) (Details) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Restricted Stock      
Number of Units      
Outstanding at beginning of year (in shares) 957 536 497
Granted (in shares) 45 764 359
Vested (in shares) (543) (317) (310)
Forfeited (in shares) (22) (26) (10)
Outstanding at end of year (in shares) 437 957 536
Weighted Average Price at Grant      
Outstanding at beginning of year (in dollars per share) $ 6.94 $ 7.98 $ 11.89
Granted (in dollars per share) 5.63 7.02 4.13
Vested (in dollars per share) 5.86 6.31 9.81
Forfeited (in dollars per share) 6.77 6.94 7.25
Outstanding at end of year (in dollars per share) $ 6.46 $ 6.94 $ 7.98
Performance Shares      
Number of Units      
Outstanding at beginning of year (in shares) 671 448 420
Granted (in shares) 41 446 225
Vested (in shares) (152) 0 0
Forfeited (in shares) (225) (223) (197)
Outstanding at end of year (in shares) 335 671 448
Weighted Average Price at Grant      
Outstanding at beginning of year (in dollars per share) $ 5.84 $ 11.71 $ 16.91
Granted (in dollars per share) 5.63 7.01 3.51
Vested (in dollars per share) 4.69 0 0
Forfeited (in dollars per share) 3.51 19.96 13.43
Outstanding at end of year (in dollars per share) $ 5.84 $ 5.84 $ 11.71