Loans Receivable, Net - Performance of Loans Modified in Last Twelve Months (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Troubled Debt Restructurings
Total	$ 66,925	$ 6,637
Non-Accrual	4,353	0
Current
Troubled Debt Restructurings
Total	62,540	2,853
30-89 Days Past Due
Troubled Debt Restructurings
Total	32	3,763
90 Days or More Past Due
Troubled Debt Restructurings
Total	0	21
Residential real estate
Troubled Debt Restructurings
Total	1,112
Non-Accrual	0
Residential real estate | Current
Troubled Debt Restructurings
Total	1,112
Residential real estate | 30-89 Days Past Due
Troubled Debt Restructurings
Total	0
Residential real estate | 90 Days or More Past Due
Troubled Debt Restructurings
Total	0
Commercial real estate
Troubled Debt Restructurings
Total	47,919	5,016
Non-Accrual	3,709	0
Commercial real estate | Current
Troubled Debt Restructurings
Total	44,210	1,446
Commercial real estate | 30-89 Days Past Due
Troubled Debt Restructurings
Total	0	3,570
Commercial real estate | 90 Days or More Past Due
Troubled Debt Restructurings
Total	0	0
Other commercial
Troubled Debt Restructurings
Total	17,772	1,593
Non-Accrual	556	0
Other commercial | Current
Troubled Debt Restructurings
Total	17,184	1,379
Other commercial | 30-89 Days Past Due
Troubled Debt Restructurings
Total	32	193
Other commercial | 90 Days or More Past Due
Troubled Debt Restructurings
Total	0	21
Home equity
Troubled Debt Restructurings
Total	88
Non-Accrual	88
Home equity | Current
Troubled Debt Restructurings
Total	0
Home equity | 30-89 Days Past Due
Troubled Debt Restructurings
Total	0
Home equity | 90 Days or More Past Due
Troubled Debt Restructurings
Total	0
Other consumer
Troubled Debt Restructurings
Total	34	28
Non-Accrual	0	0
Other consumer | Current
Troubled Debt Restructurings
Total	34	28
Other consumer | 30-89 Days Past Due
Troubled Debt Restructurings
Total	0	0
Other consumer | 90 Days or More Past Due
Troubled Debt Restructurings
Total	$ 0	$ 0