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Nature of Operations and Summary of Significant Accounting Policies - Stock Compensation Plans (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Nature of Operations and Summary of Significant Accounting Policies |  |  |
Share-based Payment Arrangement, Expense | $ 1,200,000 | $ 1,200,000 | $ 922,000

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