LOANS HELD FOR INVESTMENT - Performance of Loans Modified During Period (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	$ 2,559	$ 2,180	$ 40,135
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		147	328
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		227	109
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	243
Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		374	680
Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		1,806	39,455
Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	464	880	1,679
Residential Portfolio Segment [Member] | Conventional Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	37
Residential Portfolio Segment [Member] | Conventional Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Residential Portfolio Segment [Member] | Conventional Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Residential Portfolio Segment [Member] | Conventional Loan [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	37
Residential Portfolio Segment [Member] | Conventional Loan [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		880	1,642
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	13	40	375
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	13
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	13
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		40	362
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	0	0	32,384
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	32,384
Construction Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	0	0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Automobile Loan [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	1,335	711	3,271
Automobile Loan [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		44	19
Automobile Loan [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		138	3
Automobile Loan [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	65
Automobile Loan [Member] | Consumer Portfolio Segment [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		182	87
Automobile Loan [Member] | Consumer Portfolio Segment [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		529	3,184
Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	28	42	340
Personal Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	11
Personal Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Personal Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	0
Personal Loans [Member] | Consumer Portfolio Segment [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	11
Personal Loans [Member] | Consumer Portfolio Segment [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		42	329
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	548	289	1,553
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		103	217
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		89	92
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	147
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		192	456
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		97	1,097
Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period	$ 171	218	533
Other Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	31
Other Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	14
Other Loans [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	31
Other Loans [Member] | Consumer Portfolio Segment [Member] | Total Delinquency [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		0	76
Other Loans [Member] | Consumer Portfolio Segment [Member] | Current [Member]
Financing Receivable Modifications [Line Items]
Financing Receivable Excluding Accrued Interest Modified Period		$ 218	$ 457