Loans Receivable, Net - Performance of Loans Modified in Last Twelve Months (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Financing Receivable, Modified
Total	$ 21,806	$ 66,925
Non-Accrual	3,226	4,353
Current
Financing Receivable, Modified
Total	18,150	62,540
30-89 Days Past Due
Financing Receivable, Modified
Total	430	32
90 Days or More Past Due
Financing Receivable, Modified
Total	0	0
Residential real estate
Financing Receivable, Modified
Total		1,112
Non-Accrual		0
Residential real estate | Current
Financing Receivable, Modified
Total		1,112
Residential real estate | 30-89 Days Past Due
Financing Receivable, Modified
Total		0
Residential real estate | 90 Days or More Past Due
Financing Receivable, Modified
Total		0
Commercial real estate
Financing Receivable, Modified
Total	18,494	47,919
Non-Accrual	2,907	3,709
Commercial real estate | Current
Financing Receivable, Modified
Total	15,587	44,210
Commercial real estate | 30-89 Days Past Due
Financing Receivable, Modified
Total	0	0
Commercial real estate | 90 Days or More Past Due
Financing Receivable, Modified
Total	0	0
Other commercial
Financing Receivable, Modified
Total	3,312	17,772
Non-Accrual	319	556
Other commercial | Current
Financing Receivable, Modified
Total	2,563	17,184
Other commercial | 30-89 Days Past Due
Financing Receivable, Modified
Total	430	32
Other commercial | 90 Days or More Past Due
Financing Receivable, Modified
Total	$ 0	0
Home equity
Financing Receivable, Modified
Total		88
Non-Accrual		88
Home equity | Current
Financing Receivable, Modified
Total		0
Home equity | 30-89 Days Past Due
Financing Receivable, Modified
Total		0
Home equity | 90 Days or More Past Due
Financing Receivable, Modified
Total		0
Other consumer
Financing Receivable, Modified
Total		34
Non-Accrual		0
Other consumer | Current
Financing Receivable, Modified
Total		34
Other consumer | 30-89 Days Past Due
Financing Receivable, Modified
Total		0
Other consumer | 90 Days or More Past Due
Financing Receivable, Modified
Total		$ 0