Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 07, 2022	Oct. 07, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Deferred financing cost amortization			$ 268	$ 199	$ 198
Debt Issuance Costs, Noncurrent, Net			836	1,031
Accounts Receivable, Allowance for Credit Loss			(1,649)	(5,361)
Deferred tax assets			20,383	20,519
Letters of Credit Outstanding, Amount			4,166
Redeemable Noncontrolling Interest, Equity, Redemption Value			49,951
Noncontrolling Interest, Change in Redemption Value			15,701	4,699	315
Operating right of use assets			61,761	55,890
Operating Lease, Liability			61,594
Payments for Repurchase of Redeemable Noncontrolling Interest			0	0	1,188
Increase (Decrease) in Deferred Income Taxes			70
Stockholders' Equity Attributable to Parent			449,985	361,288	345,953	$ 283,313
Redeemable Noncontrolling Interest [Line Items]
Payments for Repurchase of Redeemable Noncontrolling Interest			$ 0	$ 0	$ 1,188
Sale of Stock, Percentage of Ownership before Transaction	100.00%	100.00%
Noncontrolling Owner
Redeemable Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			20.00%
Owner
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			80.00%
Accounting Standards Update 2016-13
Accounting Policies [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current			$ 284