ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Performance of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 119,243	$ 18,061
30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,096	1,041
90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	258	1,041
Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	93,137	15,979
Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	24,752	0
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	82,904	12,837
Commercial | Commercial and industrial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0
Commercial | Commercial and industrial | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0
Commercial | Commercial and industrial | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	58,771	12,837
Commercial | Commercial and industrial | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	24,133	0
Commercial | Owner-occupied commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	65	148
Commercial | Owner-occupied commercial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0
Commercial | Owner-occupied commercial | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0
Commercial | Owner-occupied commercial | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	148
Commercial | Owner-occupied commercial | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	65	0
Commercial | Commercial mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	9,345	2,057
Commercial | Commercial mortgages | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	1,016
Commercial | Commercial mortgages | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	1,041
Commercial | Commercial mortgages | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	9,345	0
Commercial | Commercial mortgages | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0	0
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	17,331
Commercial | Construction | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Commercial | Construction | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	17,331
Commercial | Construction | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	211
Residential | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Residential | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	44
Residential | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	167
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	9,387	3,019
Consumer | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,096	25
Consumer | 90+ Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	258	0
Consumer | Accruing Current Balances
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	7,646	2,994
Consumer | Nonaccrual Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 387	$ 0