Securities - Additional Information (Detail) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Jan. 01, 2018 |
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| Debt Securities, Available-for-sale [Line Items] | ||||
| Reduction in securities available for sale | $ (634,477,000) | $ (574,908,000) | ||
| Reduction to retained earnings | (100,551,000) | (97,539,000) | ||
| Net gain (loss) in earnings resulting from sale of securities | 1,295,000 | (870,000) | $ 1,748,000 | |
| Net unrealized gains (losses) recorded in comprehensive income | 586,000 | (413,000) | 1,300,000 | |
| Gross realized losses included in earnings | 64,000 | 957,000 | $ 143,000 | |
| Gain (Loss) on Sale of Investments | (428,000) | |||
| Available for sale securities pledged as collateral | $ 30,200,000 | 29,900,000 | ||
| ASU 2016-01 | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| Reduction in securities available for sale | $ 529,000 | |||
| Reduction to retained earnings | 382,000 | |||
| Increase in net deferred tax asset | $ 147,000 | |||
| Net unrealized gains (losses) recorded in comprehensive income | $ (529,000) | |||
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The carrying amount as of the date of the latest financial statement presented of mortgage-related securities classified as available for sale or held for investment which are owned but transferred to another party to serve as collateral to partially or fully secure a debt obligation, repurchase agreement or other current or potential obligation, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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- Details
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