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Employee Benefit Plans - Stock Option Activity (Details) - Officer and Employee Plans [Member]
 6 Months Ended
Jun. 30, 2020
$ / shares
shares
Number  
Outstanding at December 31, 2019 (in shares) | shares 136,658
Granted (in shares) | shares 0
Exercised (in shares) | shares (15,358)
Forfeited (in shares) | shares (1,435)
Outstanding at June 30, 2020 (in shares) | shares 119,865
Weighted Average Exercisable Price  
Outstanding at December 31, 2019 (in dollars per share) | $ / shares $ 10.29
Granted (in dollars per share) | $ / shares 0
Exercised (in dollars per share) | $ / shares 11.56
Forfeited (in dollars per share) | $ / shares 15.05
Outstanding at June 30, 2020 (in dollars per share) | $ / shares $ 10.08