v3.25.1
Loans Receivable and Allowance for Credit Losses (Modifications, Performance) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months $ 1,083 $ 729
Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 567 653
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 516 76
One- to Four-Family Segment [Member] | Originated [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 995 729
One- to Four-Family Segment [Member] | Originated [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 567 653
One- to Four-Family Segment [Member] | Originated [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 428 76
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial and Industrial [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Commercial Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Consumer Segment [Member] | Home Equity [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 88 0
Consumer Segment [Member] | Home Equity [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Consumer Segment [Member] | Home Equity [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 88 0
Consumer Segment [Member] | Other [Member] | Financial Asset, Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Consumer Segment [Member] | Other [Member] | Financial Asset, 30 to 89 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months 0 0
Consumer Segment [Member] | Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Financing Receivable, Modified [Line Items]    
Amortized Cost, Modified, after 12 Months $ 0 $ 0