Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Loss Contingencies [Line Items] | ||
| Total undisbursed loan commitments | $ 347,236 | $ 330,871 |
| Commitments to extend credit [Member] | ||
| Loss Contingencies [Line Items] | ||
| Total undisbursed loan commitments | 318,634 | 310,987 |
| Standby letters of credit [Member] | ||
| Loss Contingencies [Line Items] | ||
| Total undisbursed loan commitments | 19,294 | 15,669 |
| Commercial letters of credit [Member] | ||
| Loss Contingencies [Line Items] | ||
| Total undisbursed loan commitments | $ 9,308 | $ 4,215 |
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- Definition Undisbursed loan commitments. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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