Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred tax assets	$ 40,013	$ 68,090
Deferred tax liabilities	(98,548)	(64,747)
Valuation allowance	(5,927)	(8,592)
Net deferred tax liability	$ (64,462)	$ (5,249)