Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 253,318,000	$ 253,318,000	$ 302,400,000
Impairments		0	(83,094,000)	$ (268,846,000)
Effects of foreign currency translation			(422,000)
Ending balance		253,809,000	253,318,000	302,400,000
Keap Acquisition
Goodwill [Roll Forward]
Acquisition			34,434,000
Measurement period adjustments to Keap Acquisition	500,000	491,000
Marketing Services
Goodwill [Roll Forward]
Beginning balance	0	0	83,516,000
Impairments			(83,094,000)	(268,800,000)
Effects of foreign currency translation			(422,000)
Ending balance		0	0	83,516,000
Marketing Services | Keap Acquisition
Goodwill [Roll Forward]
Acquisition			0
Measurement period adjustments to Keap Acquisition		0
SaaS
Goodwill [Roll Forward]
Beginning balance	$ 253,318,000	253,318,000	218,884,000
Impairments			0
Effects of foreign currency translation			0
Ending balance		253,809,000	253,318,000	$ 218,884,000
SaaS | Keap Acquisition
Goodwill [Roll Forward]
Acquisition			$ 34,434,000
Measurement period adjustments to Keap Acquisition		$ 491,000