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Stock-Based Compensation - Summary of Restricted Stock Awards (Details) - Restricted Stock Award and Performance Award - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Shares    
Unvested, beginning balance (shares) 519,272 422,911
Granted (shares) 180,629 287,982
Vested (shares) (247,534) (191,287)
Forfeited (shares) (134) (334)
Unvested, ending balance (shares) 452,233 519,272
Weighted Average Share Price    
Unvested, beginning balance (usd per share) $ 14.69 $ 14.19
Granted (usd per share) 22.22 15.25
Vested (usd per share) 14.50 14.39
Forfeited (usd per share) 15.21 15.21
Unvested, ending balance (usd per share) $ 17.90 $ 14.69