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Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Basic earnings per share        
Net income $ 12,090 $ 8,411 $ 35,636 $ 18,362
Weighted-average common shares (in shares) 9,936,237,000 9,773,175 9,922,877,000 9,825,683
Basic earnings per common share ( in dollars per share) $ 1.22 $ 0.86 $ 3.59 $ 1.87
Diluted earnings per share        
Net income $ 12,090 $ 8,411 $ 35,636 $ 18,362
Weighted-average common shares (in shares) 9,936,237,000 9,773,175 9,922,877,000 9,825,683
Dilutive effect of equity compensation (in shares) 51,865,000 49 51,194,000 1,499
Weighted-average common and incremental shares (in shares) 9,988,102,000 9,773,224 9,974,071,000 9,827,182
Diluted earnings per common share (in dollars per share) $ 1.21 $ 0.86 $ 3.57 $ 1.87
Antidilutive securities excluded from computation of earnings per share, amount (in shares) 0 55,309 28 38,212