Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 1,113		$ 1,120
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(982)		(984)
Business Combination, Contingent Consideration, Liability, Noncurrent	(2,242)		(2,113)
Fair Value, Net Asset (Liability)	167,799		102,610
Equity Securities, FV-NI, Current	169,910		104,587
Equity Securities, FV-NI, Unrealized Gain (Loss)	17,045	$ 2,238
Debt Securities, Trading, Unrealized Gain (Loss)	0	33
Equity Securities, FV-NI	169,910		104,587
Payments to Acquire Investments	0	$ 44,900
Commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent	(2,242)		(2,113)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	$ 129
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Contingent consideration
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 1,113		1,120
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(982)		(984)
Fair Value, Net Asset (Liability)	170,041		104,723
Equity Securities, FV-NI, Current	169,910		104,587
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent	(2,242)		(2,113)
Fair Value, Net Asset (Liability)	$ (2,242)		$ (2,113)

Fair value portion of asset recognized for present right to economic benefit.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of asset after deduction of liability.

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Fair value of financial and nonfinancial obligations.

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