v3.26.1
Summary of significant accounting policies (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2026
USD ($)
segment
$ / shares
Dec. 31, 2025
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
Platform Operator, Crypto Asset [Line Items]      
Cash and cash equivalents $ 1,730,126 $ 1,526,046 $ 1,118,119
Net asset value (in dollars per share) | $ / shares $ 1.00 $ 1.00  
ESPP discount percentage from market price, beginning of purchase period (as a percent) 15.00%    
Offering period 6 months    
Number of reportable segments | segment 1    
US Treasury Securities      
Platform Operator, Crypto Asset [Line Items]      
Cash and cash equivalents $ 150,800 $ 0  
2025 Omnibus Incentive Plan      
Platform Operator, Crypto Asset [Line Items]      
Aggregate number of shares of all classes of our common stock outstanding (in percent) 5.00%    
2025 Employee Stock Purchase Plan      
Platform Operator, Crypto Asset [Line Items]      
Aggregate number of shares of all classes of our common stock outstanding (in percent) 1.00%    
Award expiration period (in years) 10 years    
Fair Value Measured at Net Asset Value Per Share      
Platform Operator, Crypto Asset [Line Items]      
Cash and cash equivalents segregated for the benefit of stablecoin holders $ 61,900,000 $ 66,300,000