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Loans Receivable - Performance Status of Loans Receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Jun. 30, 2023
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 5,748,750 | $ 5,850,476
Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 3,945,910 | 4,103,819
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 | 1,756,051 | 1,700,559
Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 46,789 | 46,098
Nonperforming |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 8,704 | 19,212
Nonaccrual Loans with no Allowance for Credit Losses | 31,178 | 23,415
Financing receivable, before allowance for credit loss, fee and loan in process | 39,882 | 42,627
Nonperforming | One- to four-family residential mortgage |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 2,295 | 1,640
Nonaccrual Loans with no Allowance for Credit Losses | 4,410 | 5,031
Financing receivable, before allowance for credit loss, fee and loan in process | 6,705 | 6,671
Performing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 5,708,868 | 5,807,849
Performing | 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 | 1,749,346 | 1,693,888
Multi-family mortgage | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,645,851 | 2,761,775
Multi-family mortgage | Nonperforming | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 0 | 5,686
Nonaccrual Loans with no Allowance for Credit Losses | 22,591 | 13,428
Financing receivable, before allowance for credit loss, fee and loan in process | 22,591 | 19,114
Multi-family mortgage | Performing | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,623,260 | 2,742,661
Nonresidential mortgage | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 948,075 | 968,574
Nonresidential mortgage | Nonperforming | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 5,695 | 11,815
Nonaccrual Loans with no Allowance for Credit Losses | 4,128 | 4,725
Financing receivable, before allowance for credit loss, fee and loan in process | 9,823 | 16,540
Nonresidential mortgage | Performing | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 938,252 | 952,034
Commercial business | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 142,747 | 146,861
Commercial business | Nonperforming | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 714 | 71
Nonaccrual Loans with no Allowance for Credit Losses | 0 | 181
Financing receivable, before allowance for credit loss, fee and loan in process | 714 | 252
Commercial business | Performing | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 142,033 | 146,609
Construction | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 209,237 | 226,609
Construction | Nonperforming | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 0 | 0
Nonaccrual Loans with no Allowance for Credit Losses | 0 | 0
Financing receivable, before allowance for credit loss, fee and loan in process | 0 | 0
Construction | Performing | Commercial loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 209,237 | 226,609
Home equity loans | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 44,104 | 43,549
Home equity loans | Nonperforming | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 0 | 0
Nonaccrual Loans with no Allowance for Credit Losses | 44 | 50
Financing receivable, before allowance for credit loss, fee and loan in process | 44 | 50
Home equity loans | Performing | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 44,060 | 43,499
Other consumer | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,685 | 2,549
Other consumer | Nonperforming | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 0 | 0
Nonaccrual Loans with no Allowance for Credit Losses | 5 | 0
Financing receivable, before allowance for credit loss, fee and loan in process | 5 | 0
Other consumer | Performing | Consumer loans: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 2,680 | $ 2,549

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