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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill | $ 125,520 | $ 125,520 |
Amortization of core deposit intangible assets | 1,484 | 1,579 | $ 1,296
Aggregate mortgage servicing rights (MSRs) amortization | 343 | 330 | 350
Fair value of servicing rights | 3,854 | $ 3,018 | 2,689
Fair value of servicing rights, discount rate |  | 12.00% |
Mortgage loans | 419,407 | $ 442,635 | 456,149
Servicing fees | $ 1,085 | $ 1,137 | $ 1,063
Minimum [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Fair value of servicing rights, discount rate | 5.30% |  |
Fair value of servicing rights prepayment speed | 13.94% | 4.60% |
Maximum [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Fair value of servicing rights, discount rate | 10.40% |  |
Fair value of servicing rights prepayment speed | 7.30% | 11.00% |
Weighted Average [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Fair value of servicing rights, discount rate | 0.00% | 0.00% |
Fair value of servicing rights prepayment speed | 10.83% |  |
Average [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Fair value of servicing rights, discount rate | 6.96% |  |

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- Definition The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-4 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481260/860-50-45-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481260/860-50-45-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481260/860-50-45-2 + Details
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