Restructuring and Other Charges - Additional Information (Detail) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2023 USD ($) Employees	Dec. 31, 2023 USD ($) Employees	Dec. 31, 2024 USD ($)
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of business		$ 13,194
Loss on sale of assets		(19,388)
Impairment of right-of-use asset		384
Restructuring charges		23,568
Net intangible assets		5,188	$ 3,252
Eversurance, LLC [Member]
Restructuring Cost and Reserve [Line Items]
Net intangible assets	$ 1,000
Purchase Agreement [Member] | Eversurance, LLC [Member]
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of business	13,200
Commissions receivable	30,800
Loss on sale of assets		19,400
Impairment of right-of-use asset		$ 400
Other net assets	400
Transaction costs	400
Net intangible assets	$ 1,000
Number of employees | Employees	0
Reduction Plan [Member]
Restructuring Cost and Reserve [Line Items]
Number of employee positions estimated to be eliminated in workforce reduction | Employees		175
Percentage of workforce eliminated		28.00%
Reduction Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 4,000
Credit adjustments to restructuring and other charges		200
Reduction Plan [Member] | Employee Severance Cash Compensation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2,700
Reduction Plan [Member] | Employee Severance Non Cash Compensation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 1,300