v3.25.4
Unconsolidated Significant Subsidiaries - Summary of Selected Key Financial Data from Balance Sheet of Unconsolidated Significant Subsidiaries (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Schedule of Equity Method Investments [Line Items]      
Total expenses $ 76,326 $ 83,748 $ 79,833
Net realized and unrealized gain (loss) on investments 32,726 48,851 (33,807)
JF Intermediate, LLC (JF Holdings Corp.)      
Schedule of Equity Method Investments [Line Items]      
Current assets 303,498 278,646  
Noncurrent assets 121,000 120,808  
Current liabilities 192,665 181,517  
Noncurrent liabilities 280,683 246,278  
Total revenue 916,105 813,923 570,348
Total expenses 936,468 836,196 584,776
Net realized and unrealized gain (loss) on investments (20,363) (22,273) (14,428)
AKW Holdings Limited      
Schedule of Equity Method Investments [Line Items]      
Current assets 38,987 41,980  
Noncurrent assets 9,620 10,016  
Current liabilities 16,042 15,464  
Noncurrent liabilities 53,902 56,665  
Total revenue 93,718 86,518 79,006
Total expenses 93,754 90,016 82,325
Net realized and unrealized gain (loss) on investments $ (36) $ (3,498) $ (3,319)