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Financial Instruments With Off-Balance Sheet Risk and Financial Instruments With Concentrations of Credit Risk (Tables) | 12 Months Ended
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Dec. 31, 2020
Risks and Uncertainties [Abstract] |
Schedule of off-balance sheet financial instruments with credit risk | The total amounts of off-balance sheet financial instruments with credit risk were as follows:
December 31 (In thousands) |  | 2020 |  | 2019
Loan commitments |  | $ | 1,372,182 |  |  | $ | 1,309,896 |
Standby letters of credit |  | 17,015 |  |  | 17,195 |

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