LOANS HELD FOR INVESTMENT - Financial Effects of the Permanent Modifications Granted to Borrowers Experiencing Financial Difficulty (Detail) - Permanent Modification [Member]	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Residential Portfolio Segment [Member] \| Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Weighted-Average Term Extension (in months)		98 months
Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	13.00%	0.00%
Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Construction Loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Automobile Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Weighted-Average Term Extension (in months)	30 months	22 months
Personal Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	8.49%	0.00%
Weighted-Average Term Extension (in months)	25 months	30 months
Credit Card Receivables [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	16.55%	16.04%
Other Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Weighted-Average Term Extension (in months)	23 months	27 months
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Residential Portfolio Segment [Member] \| Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	2.11%
Weighted-Average Term Extension (in months)		141 months
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Commercial Portfolio Segment [Member] \| Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Commercial Portfolio Segment [Member] \| Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Construction Loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Automobile Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	2.68%	2.88%
Weighted-Average Term Extension (in months)	25 months	28 months
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Personal Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	1.79%	3.36%
Weighted-Average Term Extension (in months)	14 months	12 months
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Credit Card Receivables [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Other Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	2.81%	1.96%
Weighted-Average Term Extension (in months)	19 months	26 months

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
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-URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-33

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-34

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Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A

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Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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