Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands			12 Months Ended
	Jul. 01, 2022	Jul. 01, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Percentage of net premium ratio capped			100.00%
Future policy benefits reserve percentage of net premium ratio			100.00%
Future policy benefits reserve retained earnings			$ 50,000
Increase in AOCI upon application of market observable rates			150,000
Decrease in AOCI upon application of market observable rates			150,000
Goodwill impairment loss			60,000	$ 76,000
Goodwill			127,707	179,154
Accumulated goodwill impairment charges			136,000
Depreciation expense			$ 24,100	$ 24,600	$ 18,000
Guarantee maturity value as percentage of net premiums			75.00%
Accounting standards update [extensible enumeration]			us-gaap:AccountingStandardsUpdate201812Member
Term Life Insurance Segment [Member]
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Percentage of net premium ratio capped			100.00%
Accounting standards update [extensible enumeration]			us-gaap:AccountingStandardsUpdate201812Member
Minimum [Member]
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
AOCI and equity, net of income tax			$ 1,200,000
Interest rate reserve assumptions			2.50%	2.50%
Maximum [Member]
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
AOCI and equity, net of income tax			$ 1,500,000
Interest rate reserve assumptions			7.00%	7.00%
Etelequote Bermuda [Member]
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Business acquisition, date of acquisition agreement		Jul. 01, 2021
Business acquisition, effective date of acquisition	Jul. 01, 2022
Percentage of interest acquired		80.00%
Remaining percentage of interest acquired	20.00%
Goodwill		$ 263,700
Intangible asset amortization expense			$ 10,300	$ 5,500
Amortization expense expected year one			10,500
Amortization expense expected year two			10,500
Amortization expense expected year three			10,500
Amortization expense expected year four			10,500
Amortization expense expected year five			$ 10,500
Etelequote Bermuda [Member] | Customer Relationships [Member]
Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Line Items]
Estimated useful life		15 years	15 years