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Summary of Significant Accounting Policies - Share-Based Compensation (Details) - Restricted Stock - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based compensation        
Compensation expense before tax $ 497,000 $ 428,000 $ 1,010,000.00 $ 820,000
Compensation expense after tax 355,000 $ 304,000 719,000 $ 592,000
Unrecognized compensation expense $ 3,440,000   $ 3,440,000