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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, 2016
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) |  | 2016 |  | 2015
Loan commitments |  | $ | 912,007 |  |  | $ | 888,411 |
Standby letters of credit |  | 13,746 |  |  | 12,326 |

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