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Securities - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) Security shares | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) Security | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Gain on sale of securities | $ 1,785 | $ 0 | $ 1,785 | $ 0 |
Carrying value of pledged securities | $ 171,879 |  | $ 171,879 |  | $ 159,527
Number of securities in portfolio with unrealized losses | Security | 25 |  | 25 |  |
Visa Class B Shares |  |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |  |
Number of securities sold | shares | 7,361 |  |  |  |

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- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
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