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Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | $ 80,122 | $ 86,842
Charge-offs | (40) | (4,267)
Recoveries | 170 | 242
Provision for (Recapture of) Credit Losses | (2,000) | 0
Ending Balance | 78,252 | 82,817
Commercial Real Estate [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 66,237 | 69,466
Charge-offs | 0 | (2,258)
Recoveries | 0 | 0
Provision for (Recapture of) Credit Losses | (935) | 2,237
Ending Balance | 65,302 | 69,445
Construction [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 312 | 1,277
Charge-offs | 0 | 0
Recoveries | 6 | 3
Provision for (Recapture of) Credit Losses | (80) | 16
Ending Balance | 238 | 1,296
Small Business Administration [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 2,629 | 2,679
Charge-offs | (19) | (90)
Recoveries | 22 | 63
Provision for (Recapture of) Credit Losses | (24) | (121)
Ending Balance | 2,608 | 2,531
Commercial and Industrial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 6,093 | 9,116
Charge-offs | (21) | (1,917)
Recoveries | 142 | 176
Provision for (Recapture of) Credit Losses | (96) | (2,316)
Ending Balance | 6,118 | 5,059
Dairy & Livestock and Agribusiness [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 3,610 | 3,098
Charge-offs | 0 | 0
Recoveries | 0 | 0
Provision for (Recapture of) Credit Losses | (786) | 154
Ending Balance | 2,824 | 3,252
Municipal Lease Finance Receivables [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 205 | 210
Charge-offs | 0 | 0
Recoveries | 0 | 0
Provision for (Recapture of) Credit Losses | 5 | (16)
Ending Balance | 210 | 194
SFR Mortgage [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 424 | 535
Charge-offs | 0 | 0
Recoveries | 0 | 0
Provision for (Recapture of) Credit Losses | 3 | (52)
Ending Balance | 427 | 483
Consumer and Other Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Beginning Balance | 612 | 461
Charge-offs | 0 | (2)
Recoveries | 0 | 0
Provision for (Recapture of) Credit Losses | (87) | 98
Ending Balance | $ 525 | $ 557

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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/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC Reference 2: 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 + Details
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