v3.26.1
Fair Value of Financial Instruments - Schedule of Measured at Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Due from related parties related to equity based payment awards $ 12,865 $ 15,797
Employer compensation liability related to equity based payment awards 12,865 15,797
Interest rate caps 2,356 1,758
Earnout liability   3,639
SEVN    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 38,591 17,610
SVC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 70,417  
OPI    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 7,464  
MF Fund VII    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,106 3,156
Joint Venture    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 17,622 11,134
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Due from related parties related to equity based payment awards 12,865 15,797
Employer compensation liability related to equity based payment awards 12,865 15,797
Interest rate caps 0 0
Earnout liability   0
Level 1 | SEVN    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 38,591 17,610
Level 1 | SVC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 70,417  
Level 1 | OPI    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 7,464  
Level 1 | MF Fund VII    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 1 | Joint Venture    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Due from related parties related to equity based payment awards 0 0
Employer compensation liability related to equity based payment awards 0 0
Interest rate caps 2,356 1,758
Earnout liability   0
Level 2 | SEVN    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 2 | SVC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0  
Level 2 | OPI    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0  
Level 2 | MF Fund VII    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 2 | Joint Venture    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Due from related parties related to equity based payment awards 0 0
Employer compensation liability related to equity based payment awards 0 0
Interest rate caps 0 0
Earnout liability   3,639
Level 3 | SEVN    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0 0
Level 3 | SVC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0  
Level 3 | OPI    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 0  
Level 3 | MF Fund VII    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 2,106 3,156
Level 3 | Joint Venture    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments $ 17,622 $ 11,134