v3.26.1
Investments, Debt and Equity Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]          
Debt Securities, Trading, Unrealized Gain (Loss)   $ (66) $ 0 $ (33)  
Unrealized Gain (Loss) on Investments $ 17,706 5,481 34,621 7,829  
Marketable Securities [Line Items]          
Equity Securities, FV-NI 213,983   213,983   $ 104,587
Marketable Securities, Current 213,983   213,983   $ 104,587
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 17,706 $ 5,547 $ 34,621 $ 7,862