v3.26.3
Other Investments - (Safehold Inc) (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 28, 2025
Mar. 31, 2023
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]                  
Minimum quarterly management fee expense, year five     $ 1,250,000   $ 1,250,000        
Minimum quarterly management fee expense, year six     625,000   625,000        
Safehold Inc. | Maximum                  
Schedule of Equity Method Investments [Line Items]                  
Beneficial ownership percentage under which restrictive voting requirements no longer apply   7.50%              
Percentage of ownership threshold under which registration rights will terminate.   2.00%              
Safehold Management Services | Affiliated entity                  
Schedule of Equity Method Investments [Line Items]                  
Annual management fee percent of gross book value, year five and thereafter   2.00%              
Minimum quarterly management fee expense payable, year four     7,500,000   7,500,000        
Management fees     $ 1,900,000 $ 2,500,000 $ 6,300,000 $ 8,800,000 $ 10,000,000 $ 15,000,000 $ 25,000,000
Notice required to terminate management agreement with cause   30 days              
Percentage approval of independent trustees to terminate management agreement without cause   66.70%              
Termination fee, termination without cause $ 62,500,000                
Safehold Management Services | Affiliated entity | Minimum                  
Schedule of Equity Method Investments [Line Items]                  
Notice required to terminate management agreement without cause   180 days