Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Deferred income tax assets:
Foreign net operating loss carryforward	$ 18,058	$ 26,188
Lease obligations	91,447	92,243
Limitation on interest expense deduction	9,749	0
Accumulated book depreciation in excess of tax depreciation	6,909	8,336
Other	1,493	29
Valuation allowance	(19,919)	0
Total	107,737	126,796
Deferred income tax liabilities:
Casino Operating and Services Agreement contract asset	(23,137)	(31,685)
Right-of-use lease assets	(80,728)	(81,656)
Other	(46)	(127)
Total	(103,911)	(113,468)
Deferred income tax asset, net	$ 3,826	$ 13,328