Goodwill and Intangible Assets, Net - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 68,001
Sale of Bakkt Trust	$ (3,300)	(3,343)
Goodwill, Gross		1,575,922	$ 1,579,265
Goodwill, Impaired, Accumulated Impairment Loss		(1,511,264)	$ (1,511,264)
Goodwill, ending balance		$ 64,658