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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Retained earnings which is available to distribute in the form of cash dividends to the Holding Company | $ 74.0 |
Purchase of treasury shares (in shares) | 436,619 | 142,405
Treasury Stock Acquired, Average Cost Per Share | $ 22.88 | $ 16.45
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 848,187 |
Savings Bank [Member] |  |
Liquidation Account, Conversion From Mutual to Stock Form | $ 0.4 | $ 0.4

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