v3.26.1
Loans Receivable - Contractual Payment Status of Loans Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process $ 5,878,562 $ 5,814,539
Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 44,971 43,411
30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 4,346 2,452
60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,881 8,656
90 Days and Over    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 38,744 32,303
Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 5,833,591 5,771,128
Commercial Loan    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 4,006,466 4,012,678
Commercial Loan | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,499,894 2,709,654
Commercial Loan | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,019,445 986,556
Commercial Loan | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 223,927 138,755
Commercial Loan | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 263,200 177,713
Commercial Loan | Past Due | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 33,574 27,488
Commercial Loan | Past Due | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 203 5,863
Commercial Loan | Past Due | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 205 1,701
Commercial Loan | Past Due | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,755 0
Commercial Loan | 30-59 Days | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,404 0
Commercial Loan | 30-59 Days | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 926
Commercial Loan | 30-59 Days | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Commercial Loan | 30-59 Days | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Commercial Loan | 60-89 Days | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 5,270
Commercial Loan | 60-89 Days | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Commercial Loan | 60-89 Days | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 400
Commercial Loan | 60-89 Days | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Commercial Loan | 90 Days and Over | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 31,170 22,218
Commercial Loan | 90 Days and Over | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 203 4,937
Commercial Loan | 90 Days and Over | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 205 1,301
Commercial Loan | 90 Days and Over | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,755 0
Commercial Loan | Current | Multi-family mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,466,320 2,682,166
Commercial Loan | Current | Nonresidential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,019,242 980,693
Commercial Loan | Current | Commercial and industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 223,722 137,054
Commercial Loan | Current | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 260,445 177,713
One- to four-family residential mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,789,865 1,748,591
One- to four-family residential mortgage | Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 7,864 7,883
One- to four-family residential mortgage | 30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,791 1,350
One- to four-family residential mortgage | 60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,683 2,890
One- to four-family residential mortgage | 90 Days and Over    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 4,390 3,643
One- to four-family residential mortgage | Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 1,782,001 1,740,708
Consumer Loan    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 82,231 53,270
Consumer Loan | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 79,844 50,737
Consumer Loan | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 2,387 2,533
Consumer Loan | Past Due | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 370 476
Consumer Loan | Past Due | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Consumer Loan | 30-59 Days | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 151 176
Consumer Loan | 30-59 Days | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Consumer Loan | 60-89 Days | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 198 96
Consumer Loan | 60-89 Days | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Consumer Loan | 90 Days and Over | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 21 204
Consumer Loan | 90 Days and Over | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 0 0
Consumer Loan | Current | Home equity loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process 79,474 50,261
Consumer Loan | Current | Other consumer    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Financing receivable, before allowance for credit loss, fee and loan in process $ 2,387 $ 2,533