v3.26.1
Related Party Disclosures - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Related Party Transaction [Line Items]      
Payments to related partied under Tax Receivable Agreements $ 12,565 $ 9,819 $ 10,281
Management and advisory fees, net      
Related Party Transaction [Line Items]      
Service fees 926,465 767,014 585,140
Management and advisory fees, net | Stepstone Funds      
Related Party Transaction [Line Items]      
Service fees 664,600 570,900 390,500
Total incentive fees      
Related Party Transaction [Line Items]      
Service fees 220,133 32,275 25,339
Total incentive fees | Stepstone Funds      
Related Party Transaction [Line Items]      
Service fees 209,100 22,600 9,100
Carried Interest Allocations      
Related Party Transaction [Line Items]      
Total carried interest allocations 708,294 301,200 176,309
Carried Interest Allocations | Stepstone Funds      
Related Party Transaction [Line Items]      
Total carried interest allocations 708,300 301,200 176,300
Legacy Greenspring Carried Interest Allocations      
Related Party Transaction [Line Items]      
Total carried interest allocations 138,711 74,341 (75,157)
Legacy Greenspring Carried Interest Allocations | Stepstone Funds      
Related Party Transaction [Line Items]      
Total carried interest allocations $ 138,700 $ 74,300 $ (75,200)