Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Accumulated Other Comprehensive Income [Line Items] | |||
| Net gain on sales of securities | $ 46 | $ 6,611 | $ 2,011 |
| Net unrealized gains (losses) recognized in earnings resulting from the redemption of investment securities | (314) | (1,900) | (498) |
| Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] | |||
| Accumulated Other Comprehensive Income [Line Items] | |||
| Net gain on sales of securities | $ 0 | $ 6,600 | $ 2,000 |
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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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- Definition The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/presentationRef
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