Revenue from Contracts with Customers - Summary of Renewal Commissions Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Senior Health Segment [Member]
Disaggregation Of Revenue [Line Items]
Contract balances acquired as part of business combination	$ 199,575		$ 199,575
Commissions revenue	16,526		16,526
Less: collections	(6,842)		(6,842)
Balance, at the end of period	209,259		209,259
Corporate and Other Distributed Products Segment [Member]
Disaggregation Of Revenue [Line Items]
Balance, beginning of period	56,683	$ 52,523	54,845	$ 51,701
Commissions revenue	8,810	6,618	21,969	18,435
Less: collections	(5,800)	(5,579)	(17,121)	(16,574)
Balance, at the end of period	$ 59,693	$ 53,562	$ 59,693	$ 53,562