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Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Allowance for credit loss | $ 121,522 | $ 105,680 | $ 85,376 | $ 91,847
Total allowance for credit losses |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Allowance for credit loss | 118,430 | 103,266 |  |
Qualitative and forecast factor allowance |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Allowance for credit loss | 84,291 | 70,777 |  |
Quantitative (Cohort) model allowance |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Allowance for credit loss | 34,139 | 32,489 |  |
Allowance for individually evaluated loans |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Allowance for credit loss | $ 3,092 | $ 2,414 |  |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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