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Income Taxes - Net Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Deferred tax assets |  |
Loan loss reserves | $ 31,055 | $ 50,411
REO reserves | 518 | 1,693
Non-accrual loan interest | 877 | 2,262
FDIC assisted transactions | 0 | 12,236
Federal and state tax credits | 1,074 | 3,939
Deferred compensation | 3,165 | 3,037
Stock based compensation | 1,677 | 2,259
Other | 1,747 | 1,274
Total deferred tax assets | 40,113 | 77,111
Deferred tax liabilities |  |
FHLB stock dividends | 14,941 | 24,135
Valuation adjustment on available-for-sale securities and cash flow hedges | 2,442 | 2,914
Loan origination fees and costs | 9,285 | 13,643
Premises and equipment | 23,429 | 35,950
Other | 1,828 | 2,145
Total deferred tax liabilities | 51,925 | 78,787
Net deferred tax asset (liability) | (11,812) | (1,676)
Current tax asset (liability) | 13,616 | (3,920)
Net tax asset (liability) | $ 1,804 | $ (5,596)

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