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Equity Compensation Plans - Deferred Stock Units Activity (Details) - Deferred Stock Units - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Units      
Beginning of period (in shares) 2,805,144 2,630,805 2,336,720
Granted (in shares) 1,588,862 1,186,154 733,096
Distributions (in shares) (340,757) (720,562) (419,113)
Forfeited (in shares) (31,161) (291,253) (19,898)
Balance at End of Period (in shares) 4,022,088 2,805,144 2,630,805
Weighted Average Grant Date Fair Market Value      
Beginning of period (in dollars per share) $ 13.84 $ 15.66 $ 15.58
Granted (in dollars per share) 12.04 10.69 16.06
Distributions (in dollars per share) 15.82 14.31 15.96
Forfeited (in dollars per share) 17.65 16.25 15.96
Balance at End of Period (in dollars per share) $ 12.93 $ 13.84 $ 15.66