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INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Deferred tax assets: |  |
Pension and postretirement benefits | $ 11,832 | $ 39,705
Accruals and reserves not currently deductible | 8,753 | 12,258
Income tax credit carryforward | 5,206 | 5,308
Operating and capital loss carryforwards | 51,438 | 34,146
Stock options | 4,944 | 4,062
Other | 1,320 | 8,376
Total deferred tax assets | 83,493 | 103,855
Valuation allowances | (28,619) | (22,527)
Net deferred tax assets | 54,874 | 81,328
Deferred tax liabilities: |  |
Depreciation | (23,224) | (27,671)
Unrealized gains and losses | (886) | 389
Goodwill and intangible assets | (113,476) | (123,259)
Other | (11,215) | (5,941)
Total deferred tax liabilities | (148,801) | (156,482)
Net deferred tax liability | $ (93,927) | $ (75,154)

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