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INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Deferred tax assets: |  |
Pension and postretirement benefits | $ 37,587 | $ 24,597
Accruals and reserves not currently deductible | 10,400 | 9,596
Income tax credit carryforward | 3,204 | 3,216
Operating and capital loss carryforwards | 21,896 | 21,858
Stock options | 4,778 | 5,157
Other | 5,381 | 3,963
Total deferred tax assets | 83,246 | 68,387
Valuation allowances | (15,352) | (15,188)
Net deferred tax assets | 67,894 | 53,199
Deferred tax liabilities: |  |
Depreciation | (24,792) | (16,156)
Unrealized gains and losses | (565) | (8,637)
Goodwill and intangible assets | (138,952) | (147,571)
Other | (1,035) | (517)
Deferred tax liabilities | (165,344) | (172,881)
Net deferred tax liability | $ (97,450) | $ (119,682)

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