v3.25.2
Debt- 2021 Convertible Senior Secured Notes (Q2) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Oct. 31, 2021
Debt Instrument [Line Items]                
Interest expense $ 256,162 $ 67,097 $ 513,533 $ 107,600 $ 349,203 $ 26,967 $ 8,374  
Amortization of debt discounts and issuance costs and accretion of redemption premiums $ 29,036 7,547 $ 66,727 15,605 33,376 16,533 3,803  
2021 Convertible Senior Secured Notes | Senior Notes                
Debt Instrument [Line Items]                
Face amount           55,000   $ 50,000
Change in fair value   262,000   344,000 627,000 361,000 3,000  
Interest expense   3,000   6,000 8,000 31,000 7,000  
Interest expense, coupon rate   1,000   3,000 4,000 5,000 4,000  
Amortization of debt discounts and issuance costs and accretion of redemption premiums   $ 2,000   $ 3,000 $ 4,000 $ 4,000 $ 3,000