Goodwill and Intangible Assets - Goodwill Rollforward (Q2) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2025	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 19,544	$ 97
Addition	793,426	19,447
Ending balance	$ 812,970	$ 19,544

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details