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INCOME TAXES - DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Deferred tax assets |  |
Investment tax credits | $ 192,238 | $ 191,948
State net operating losses | 38,762 | 39,612
Deferred revenue | 14,107 | 8,205
Fair value of derivatives | 5,397 | 5,386
Impairment of equity method investment | 14,004 | 14,004
Postemployment benefits | 855 | 6,502
Incentive compensation | 10,142 | 8,949
Amortization of intangibles | 6,248 | 6,308
Overrecovered natural gas costs | 9,072 | 8,564
Allowance for doubtful accounts | 3,744 | 4,485
Other | 7,226 | 7,636
Total deferred tax assets | 301,795 | 301,599
Less: Valuation allowance | (5,621) | (5,747)
Total deferred tax assets net of valuation allowance | 296,174 | 295,852
Deferred tax liabilities |  |
Property-related items | (563,403) | (487,294)
Remediation costs | (21,656) | (18,532)
Investments in equity investees | (28,704) | (28,325)
Conservation incentive program | (14,379) | (14,075)
Other | (6,065) | (4,670)
Total deferred tax liabilities | (634,207) | (552,896)
Total net deferred tax liabilities | (338,033) | (257,044)
Tax credit carryforward | 191,600 | 191,200
NJNG |  |
Deferred tax liabilities |  |
Tax credit carryforward | $ 700 | $ 700

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