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v3.21.1

Allowance for Losses on Loans - Internally Assigned Grade (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 13,208,075 | $ 12,959,272
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 12,493,123 | $ 12,303,135
Pass | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 94.59% | 94.94%
Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 138,062 | $ 247,543
Special mention | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 1.05% | 1.91%
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 576,890 | $ 408,594
Substandard | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 4.37% | 3.15%
Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0
Doubtful | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.00% | 0.00%
Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0
Loss | Accounts Receivable | Credit Concentration Risk |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total grade as a % of total loans | 0.00% | 0.00%
Commercial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 7,726,098 | $ 7,044,426
Commercial loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 7,042,556 | 6,412,415
Commercial loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 137,873 | 247,351
Commercial loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 545,669 | 384,660
Commercial loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,987,120 | 1,538,240
Commercial loans | Multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,918,072 | 1,506,692
Commercial loans | Multi-family | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 10,586 | 13,721
Commercial loans | Multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 58,462 | 17,827
Commercial loans | Multi-family | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Multi-family | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,211,065 | 1,884,688
Commercial loans | Commercial real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,937,033 | 1,681,230
Commercial loans | Commercial real estate | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 62,847 | 92,184
Commercial loans | Commercial real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 211,185 | 111,274
Commercial loans | Commercial real estate | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial real estate | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial & industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,452,585 | 2,115,513
Commercial loans | Commercial & industrial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,173,851 | 1,898,709
Commercial loans | Commercial & industrial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 48,867 | 64,695
Commercial loans | Commercial & industrial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 229,867 | 152,109
Commercial loans | Commercial & industrial | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Commercial & industrial | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 925,017 | 1,352,414
Commercial loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 881,202 | 1,187,786
Commercial loans | Construction | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 61,178
Commercial loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 43,815 | 103,450
Commercial loans | Construction | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Construction | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Land - acquisition & development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 150,311 | 153,571
Commercial loans | Land - acquisition & development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 132,398 | 137,998
Commercial loans | Land - acquisition & development | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 15,573 | 15,573
Commercial loans | Land - acquisition & development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 2,340 | 0
Commercial loans | Land - acquisition & development | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Commercial loans | Land - acquisition & development | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 5,481,977 | 5,914,846
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 5,450,567 | 5,890,720
Consumer loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 189 | 192
Consumer loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 31,221 | 23,934
Consumer loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 308,831 | 295,953
Consumer loans | Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 308,831 | 295,953
Consumer loans | Construction | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Construction | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Single-family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 4,802,575 | 5,293,962
Consumer loans | Single-family residential | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 4,773,261 | 5,270,666
Consumer loans | Single-family residential | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 189 | 192
Consumer loans | Single-family residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 29,125 | 23,104
Consumer loans | Single-family residential | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Single-family residential | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 122,211 | 101,394
Consumer loans | Land - consumer lot loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 122,034 | 101,151
Consumer loans | Land - consumer lot loans | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 177 | 243
Consumer loans | Land - consumer lot loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Land - consumer lot loans | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 145,066 | 140,222
Consumer loans | HELOC | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 143,167 | 139,646
Consumer loans | HELOC | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 1,899 | 576
Consumer loans | HELOC | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | HELOC | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 103,294 | 83,315
Consumer loans | Consumer | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 103,274 | 83,304
Consumer loans | Consumer | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 20 | 11
Consumer loans | Consumer | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | 0 | 0
Consumer loans | Consumer | Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Gross loans | $ 0 | $ 0

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