Revenue from Contracts with Customers - Summary of Renewal Commissions Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Senior Health Segment [Member]
Disaggregation Of Revenue [Line Items]
Balance, beginning of period	$ 172,308
Commissions revenue	12,849
Less: collections	(12,314)
Tail revenue adjustments from change in estimate	(19,060)
Balance, at the end of period	153,783
Corporate and Other Distributed Products Segment [Member]
Disaggregation Of Revenue [Line Items]
Balance, beginning of period	59,443	$ 54,845
Commissions revenue	5,643	6,262
Less: collections	(5,694)	(5,402)
Balance, at the end of period	$ 59,392	$ 55,705