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Circle Reserve Fund - Summary of Financial Information of the Circle Reserve Fund (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Jun. 30, 2025
Schedule of Equity Method Investments [Line Items]      
Total assets $ 45,834,409 $ 25,996,583 $ 64,153,508
Total liabilities 44,124,115 24,525,852 $ 61,782,677
Circle Reserve Fund [Member]      
Schedule of Equity Method Investments [Line Items]      
Total assets 30,567,886 [1] 23,595,866 [2]  
Total liabilities 129,015 [1] 107,939 [2]  
Total investment income 1,460,787 [1] 1,173,135 [2]  
Net increase in net assets resulting from operations $ 1,437,053 [1] $ 1,151,901 [2]  
[1] Summarized financial information is as of October 31, 2024 and for the fiscal year then ended.
[2] Summarized financial information is as of October 31, 2023 and for the period from November 3, 2022 through October 31, 2023. Circle Reserve Fund commenced operations on November 3, 2022.