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Stock-Based Compensation Plans - Summary of Nonvested RSAs (Details) - Restricted Share Awards (RSAs)
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Number of Shares  
Nonvested, beginning balance (in shares) | shares 92,842
Vested (in shares) | shares (88,913)
Forfeited (in shares) | shares (3,929)
Nonvested, ending balance (in shares) | shares 0
Weighted Average Grant Date Fair Value  
Nonvested, beginning balance (in dollars per share) | $ / shares $ 20.13
Vested (in dollars per share) | $ / shares 20.12
Forfeited (in dollars per share) | $ / shares 20.35
Nonvested, ending balance (in dollars per share) | $ / shares $ 0