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Stock-Based Compensation Plans (Performance Stock Units) (Details) - Performance Stock Units - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Shares    
Units outstanding beginning (in shares) 1,730,002 2,778,362
Vested (in shares) (287,109) (303,460)
Forfeited (in shares) (433,802) (744,900)
Units outstanding ending (in shares) 1,009,091 1,730,002
Weighted average fair value    
Weighted average grant date fair value - Beginning (in dollars per shares) $ 9.31 $ 10.09
Vested (in dollars per shares) 9.33 4.00
Forfeited (in dollars per shares) 9.33 11.57
Weighted average grant date fair value - Ending (in dollars per shares) $ 6.60 $ 9.31