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Income Taxes - Net Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Deferred tax assets |  |
Loan loss reserves | $ 50,411 | $ 45,531
REO reserves | 1,693 | 4,018
Valuation adjustment on available-for-sale securities and cash flow hedges | 0 | 6,482
Non-accrual loan interest | 2,262 | 2,812
FDIC assisted transactions | 12,236 | 9,598
Federal and state tax credits | 3,939 | 1,791
Deferred compensation | 3,037 | 2,359
Stock based compensation | 2,259 | 925
Other | 1,274 | 625
Total deferred tax assets | 77,111 | 74,141
Deferred tax liabilities |  |
FHLB stock dividends | 24,135 | 24,135
Valuation adjustment on available-for-sale securities and cash flow hedges | 2,914 | 0
Loan origination fees and costs | 13,643 | 14,826
Premises and equipment | 35,950 | 34,936
Other | 2,145 | 5,320
Total deferred tax liabilities | 78,787 | 79,217
Net deferred tax asset (liability) | (1,676) | (5,076)
Current tax asset (liability) | (3,920) | 21,123
Net tax asset (liability) | $ (5,596) | $ 16,047

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