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Income Taxes - Net Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Deferred tax assets |  |
Allowance for credit losses | $ 45,724 | $ 44,150
REO reserves | 173 | 265
Non-accrual loan interest | 1,080 | 892
Deferred compensation | 6,230 | 3,506
Stock based compensation | 2,508 | 2,218
Lease liability | 6,655 | 7,660
Other | 4,525 | 2,269
Total deferred tax assets | 66,895 | 60,960
Deferred tax liabilities |  |
FHLB stock dividends | 9,783 | 14,637
Valuation adjustment on available-for-sale securities and cash flow hedges | 20,845 | 5,064
Loan origination fees and costs | 5,645 | 7,116
Premises and equipment | 21,426 | 21,399
Lease right-of-use assets | 6,249 | 7,270
Other | 9,139 | 5,767
Total deferred tax liabilities | 73,087 | 61,253
Net deferred tax asset (liability) | (6,192) | (293)
Current tax asset (liability) | 10,069 | 6,001
Net tax asset (liability) | $ 3,877 | $ 5,708

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