Income Taxes - Schedule of Income Tax Expense from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Current
Federal	$ (1,274)	$ 2,849	$ 0
State	13,550	28,125	252
Deferred
Federal	83,244	43,435	128,867
State	18,259	3,101	24,617
Income tax expense	$ 113,779	$ 77,510	$ 153,736