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Loans Receivable - Performance Status of Loans Receivable (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Jun. 30, 2022
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 6,001,107 | $ 5,436,576
Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 4,233,255 | 3,745,866
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 | 1,719,514 | 1,645,816
Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 48,338 | 44,894
Performing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 5,960,558 | 5,366,255
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 | 1,713,477 | 1,637,327
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 | 23,255 | 25,026
Nonaccrual Loans with no Allowance for Credit Losses | 17,294 | 45,295
Financing receivable, before allowance for credit loss, fee and loan in process | 40,549 | 70,321
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 | 2,916 | 3,543
Nonaccrual Loans with no Allowance for Credit Losses | 3,121 | 4,946
Financing receivable, before allowance for credit loss, fee and loan in process | 6,037 | 8,489
Multi-family mortgage | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,851,721 | 2,409,090
Multi-family mortgage | Performing | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,835,450 | 2,382,437
Multi-family mortgage | Nonperforming | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 7,890 | 8,367
Nonaccrual Loans with no Allowance for Credit Losses | 8,381 | 18,286
Financing receivable, before allowance for credit loss, fee and loan in process | 16,271 | 26,653
Nonresidential mortgage | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 1,017,341 | 1,019,838
Nonresidential mortgage | Performing | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 999,458 | 987,944
Nonresidential mortgage | Nonperforming | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 12,187 | 12,602
Nonaccrual Loans with no Allowance for Credit Losses | 5,696 | 19,292
Financing receivable, before allowance for credit loss, fee and loan in process | 17,883 | 31,894
Commercial business | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 177,530 | 176,807
Commercial business | Performing | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 177,258 | 176,514
Commercial business | Nonperforming | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 Days and Over Past Due Accruing | 0 | 0
Nonaccrual Loans with Allowance for Credit Losses | 262 | 212
Nonaccrual Loans with no Allowance for Credit Losses | 10 | 81
Financing receivable, before allowance for credit loss, fee and loan in process | 272 | 293
Construction | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 186,663 | 140,131
Construction | Performing | Commercial Loan |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 186,663 | 138,570
Construction | Nonperforming | Commercial Loan |  |
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 | 1,561
Financing receivable, before allowance for credit loss, fee and loan in process | 0 | 1,561
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 | 45,690 | 42,028
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 | 45,604 | 40,597
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 | 302
Nonaccrual Loans with no Allowance for Credit Losses | 86 | 1,129
Financing receivable, before allowance for credit loss, fee and loan in process | 86 | 1,431
Other consumer | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,648 | 2,866
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 | 2,648 | 2,866
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 | 0 | 0
Financing receivable, before allowance for credit loss, fee and loan in process | $ 0 | $ 0

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