Accumulated Other Comprehensive Income - Additional Information (Detail) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
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Mar. 31, 2016 |
Dec. 31, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
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| Accumulated Other Comprehensive Income [Line Items] | ||||||
| Net gain on sales of securities | $ 0 | $ 1,912,000 | $ 0 | $ 4,096,000 | ||
| Unrealized gain from sale of securities | $ 4,100,000 | $ 1,200,000 | 4,100,000 | 1,200,000 | ||
| 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 | $ 1,900,000 | $ 0 | $ 4,100,000 | ||
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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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