LOANS HELD FOR INVESTMENT - Loan Modifications are Considered TDRs (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) numberofcontracts
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 4,670
Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	2,993
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	5
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0
Construction loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	0
Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	993
Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	264
Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	78
Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	148
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 189
TDR [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	164
Pre-modification Outstanding Recorded Investment	$ 4,673
Post-Modification Outstanding Recorded Investment	$ 4,670
TDR [Member] | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	23
Pre-modification Outstanding Recorded Investment	$ 2,996
Post-Modification Outstanding Recorded Investment	$ 2,993
TDR [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	1
Pre-modification Outstanding Recorded Investment	$ 5
Post-Modification Outstanding Recorded Investment	$ 5
TDR [Member] | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0
Pre-modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	$ 0
TDR [Member] | Construction loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0
Pre-modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	$ 0
TDR [Member] | Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	51
Pre-modification Outstanding Recorded Investment	$ 995
Post-Modification Outstanding Recorded Investment	$ 993
TDR [Member] | Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	13
Pre-modification Outstanding Recorded Investment	$ 264
Post-Modification Outstanding Recorded Investment	$ 264
TDR [Member] | Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	5
Pre-modification Outstanding Recorded Investment	$ 78
Post-Modification Outstanding Recorded Investment	$ 78
TDR [Member] | Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	44
Pre-modification Outstanding Recorded Investment	$ 189
Post-Modification Outstanding Recorded Investment	$ 189
TDR [Member] | Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	27
Pre-modification Outstanding Recorded Investment	$ 146
Post-Modification Outstanding Recorded Investment	$ 148