LOANS HELD FOR INVESTMENT - Financial Effects of the Permanent Modifications Granted to Borrowers Experiencing Financial Difficulty (Detail) - Permanent Modification [Member]	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Residential Portfolio Segment [Member] \| Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Weighted-Average Term Extension (in months)	236 months	239 months	236 months	118 months
Construction Loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Mortgage loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Weighted-Average Term Extension (in months)	96 months		96 months
Commercial and Industrial loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	13.00%	0.00%
Weighted-Average Term Extension (in months)		72 years		72 months
Automobile Loan [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Weighted-Average Term Extension (in months)	21 months	27 months	26 months	25 months
Personal Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Weighted-Average Term Extension (in months)		37 months	25 months	34 months
Credit Card Receivables [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	17.55%	16.26%	17.11%	16.15%
Other Loans [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	0.00%	0.00%
Weighted-Average Term Extension (in months)	26 months	28 months	24 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 (%)	0.50%	0.00%	3.50%	2.40%
Weighted-Average Term Extension (in months)	256 months		36 months	157 months
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%	0.00%	0.00%
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Mortgage loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.25%	0.00%	0.25%
Weighted-Average Term Extension (in months)		64 years		64 months
Combination Of Interest Rate Below Market Reduction And Extended Maturity [Member] \| Commercial and Industrial loans [Member] \| Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Weighted-Average Interest Rate Reduction (%)	0.00%	0.00%	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 (%)	3.29%	3.96%	2.57%	3.64%
Weighted-Average Term Extension (in months)	28 months	30 months	28 months	30 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 (%)	2.99%	5.41%	3.44%	5.11%
Weighted-Average Term Extension (in months)	19 months	26 months	17 months	24 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%	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 (%)	3.34%	1.87%	3.31%	1.92%
Weighted-Average Term Extension (in months)	17 months	22 months	17 months	24 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
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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