Accounting Pronouncements - Changes in Assets and Liabilities under ASU 2018-12 (Details) - USD ($) $ in Thousands		9 Months Ended
	Dec. 31, 2020	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Liability for Future Policy Benefits
Post-adoption liability, ending balance	$ 1,613,279
Fixed Annuity Liability
Ending balance	81,730
Deferred Acquisition Costs
Beginning balance		$ 162,927	$ 152,418
Ending balance	143,123	171,417	159,104
Cost of Insurance Acquired
Ending balance	12,025
Retained earnings (accumulated deficit)		31,332		$ 16,309
Accumulated other comprehensive income (loss), net of tax		(126,667)		(137,044)
Effect of Modified Retrospective Application Accounting Standards Update 2018-12
Cost of Insurance Acquired
Retained earnings (accumulated deficit)	(100)
Accumulated other comprehensive income (loss), net of tax	(316,800)
Life Insurance:
Liability for Future Policy Benefits
Pre-adoption liability, beginning balance		1,143,027	1,408,961
Change in discount rate assumptions		(16,881)	(16,652)
Effect of reserve changes		(33,484)	(29,380)
Post-adoption liability, ending balance	1,249,202	1,099,218	1,128,009
Fixed Annuity Liability
Ending balance	60,027
Deferred Acquisition Costs
Beginning balance		113,484	107,702
Ending balance	103,064	117,800	110,856
Cost of Insurance Acquired
Ending balance	1,734
Home Service Insurance:
Liability for Future Policy Benefits
Pre-adoption liability, beginning balance		316,707	427,921
Change in discount rate assumptions		(10,835)	(10,015)
Effect of reserve changes		(6,890)	(3,175)
Post-adoption liability, ending balance	364,077	304,575	317,567
Fixed Annuity Liability
Ending balance	21,703
Deferred Acquisition Costs
Beginning balance		49,443	44,716
Ending balance	40,059	53,617	$ 48,248
Cost of Insurance Acquired
Ending balance	10,291
Previously Reported
Liability for Future Policy Benefits
Post-adoption liability, ending balance	1,242,886
Fixed Annuity Liability
Beginning balance		91,234
Ending balance	78,304
Deferred Acquisition Costs
Beginning balance		140,167
Ending balance	104,913
Cost of Insurance Acquired
Ending balance	11,541
Retained earnings (accumulated deficit)				(52,203)
Accumulated other comprehensive income (loss), net of tax				(195,279)
Previously Reported | Life Insurance:
Liability for Future Policy Benefits
Post-adoption liability, ending balance	987,373
Fixed Annuity Liability
Ending balance	60,027
Deferred Acquisition Costs
Ending balance	94,771
Cost of Insurance Acquired
Ending balance	1,734
Previously Reported | Home Service Insurance:
Liability for Future Policy Benefits
Post-adoption liability, ending balance	255,513
Fixed Annuity Liability
Ending balance	18,277
Deferred Acquisition Costs
Ending balance	10,142
Cost of Insurance Acquired
Ending balance	9,807
Revision of Prior Period, Accounting Standards Update, Adjustment
Liability for Future Policy Benefits
Change in discount rate assumptions	370,291
Effect of reserve changes	102
Fixed Annuity Liability
Beginning balance		(91,234)
Ending balance	3,426
Deferred Acquisition Costs
Beginning balance		$ 22,760
Impact of flooring cohorts at zero	35
Ending balance	38,175
Cost of Insurance Acquired
Ending balance	484
Retained earnings (accumulated deficit)				68,512
Accumulated other comprehensive income (loss), net of tax				$ 58,235
Revision of Prior Period, Accounting Standards Update, Adjustment | Life Insurance:
Liability for Future Policy Benefits
Change in discount rate assumptions	261,823
Effect of reserve changes	6
Fixed Annuity Liability
Ending balance	0
Deferred Acquisition Costs
Impact of flooring cohorts at zero	23
Ending balance	8,270
Cost of Insurance Acquired
Ending balance	0
Revision of Prior Period, Accounting Standards Update, Adjustment | Home Service Insurance:
Liability for Future Policy Benefits
Change in discount rate assumptions	108,468
Effect of reserve changes	96
Fixed Annuity Liability
Ending balance	3,426
Deferred Acquisition Costs
Impact of flooring cohorts at zero	12
Ending balance	29,905
Cost of Insurance Acquired
Ending balance	$ 484