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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

Allowance For Loans And Lease Loss Recovery Of Bad Debts

+ References

No definition available.

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- Definition

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+ References

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- Definition

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+ References

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- Definition

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+ References

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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

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