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Income Taxes
 6 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
INCOME TAXES INCOME TAXES
The Company’s income tax expense for the three and six months ended March 31, 2025 was $248.0 million and $506.0 million, respectively, compared to $344.8 million and $636.6 million in the prior year periods. The effective tax rate was 23.2% for both the three and six months ended March 31, 2025 compared to 22.6% and 22.9% in the prior year periods. The effective tax rates for all periods include an expense for state income taxes and tax benefits related to stock-based compensation and federal energy efficient homes tax credits.

The Company’s deferred tax assets, net of deferred tax liabilities, were $89.5 million at March 31, 2025 compared to $182.4 million at September 30, 2024. The Company has a valuation allowance of $14.9 million at March 31, 2025 and September 30, 2024 related to deferred tax assets for state net operating loss (NOL) and tax credit carryforwards that are expected to expire before being realized. The Company will continue to evaluate both the positive and negative evidence in determining the need for a valuation allowance with respect to the remaining state NOL and tax credit carryforwards. Any reversal of the valuation allowance in future periods will impact the Company’s effective tax rate.