Policyholders' Liabilities - Schedule of Liability for Future Policy Benefits (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 31, 2020	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Post-adoption liability, ending balance	$ 1,613,279
Home Service Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		$ 106,763	$ 114,752
Beginning balance at original discount rate		114,619	99,544
Effects of actual variances from expected experience				$ (2,180)	$ (207)
Adjusted beginning of year balance				112,439	99,337
Issuances		5,965	5,060
Interest accrual		1,100	865
Net premiums collected		(2,500)	(1,113)
Derecognition and other		178	(1,089)
Ending balance at original discount rate		117,182	103,060
Change in discount rate assumptions		(5,798)	5,018
Balance, end of period		111,384	108,078
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		316,707	427,921
Beginning balance at original discount rate		336,096	322,765
Effects of actual variances from expected experience				(1,274)	1,715
Adjusted beginning of year balance				334,822	324,480
Issuances		5,965	5,058
Interest accrual		3,720	3,513
Benefit payments		(5,926)	(7,889)
Derecognition and other		177	(1,090)
Ending balance at original discount rate		338,758	324,072
Effect of changes in discount rates		(13,813)	51,418
Post-adoption liability, ending balance	364,077	324,945	375,490
Net liability for future policy benefits		213,561	267,412
Life Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		245,437	274,467
Beginning balance at original discount rate		258,283	251,479
Effects of actual variances from expected experience				2,107	2,115
Adjusted beginning of year balance				260,390	253,594
Issuances		6,995	6,916
Interest accrual		2,344	2,086
Net premiums collected		(10,466)	(9,033)
Derecognition and other		191	81
Ending balance at original discount rate		259,454	253,644
Change in discount rate assumptions		(9,136)	5,749
Balance, end of period		250,318	259,393
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		1,143,027	1,408,961
Beginning balance at original discount rate		1,204,220	1,198,026
Effects of actual variances from expected experience				3,583	3,405
Adjusted beginning of year balance				1,207,803	1,201,431
Issuances		7,160	7,004
Interest accrual		12,954	12,783
Benefit payments		(24,026)	(21,633)
Derecognition and other		26	(6)
Ending balance at original discount rate		1,203,917	1,199,579
Effect of changes in discount rates		(40,524)	85,637
Post-adoption liability, ending balance	$ 1,249,202	1,163,393	1,285,216
Net liability for future policy benefits		913,075	1,025,823
Permanent | Home Service Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		93,508	104,556
Beginning balance at original discount rate		100,225	90,012
Effects of actual variances from expected experience				(1,371)	876
Adjusted beginning of year balance				98,854	90,888
Issuances		4,789	4,349
Interest accrual		986	822
Net premiums collected		(2,967)	(2,723)
Derecognition and other		132	(1,113)
Ending balance at original discount rate		101,794	92,223
Change in discount rate assumptions		(4,925)	5,130
Balance, end of period		96,869	97,353
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		200,351	266,206
Beginning balance at original discount rate		214,188	205,340
Effects of actual variances from expected experience				(1,299)	1,090
Adjusted beginning of year balance				212,889	206,430
Issuances		4,789	4,350
Interest accrual		2,310	2,164
Benefit payments		(4,178)	(5,832)
Derecognition and other		132	(1,114)
Ending balance at original discount rate		215,942	205,998
Effect of changes in discount rates		(10,101)	28,342
Post-adoption liability, ending balance		205,841	234,340
Net liability for future policy benefits		108,972	136,987
Permanent | Life Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		235,228	269,528
Beginning balance at original discount rate		247,601	246,386
Effects of actual variances from expected experience				1,742	1,693
Adjusted beginning of year balance				249,343	248,079
Issuances		6,236	5,795
Interest accrual		2,272	2,088
Net premiums collected		(9,715)	(9,166)
Derecognition and other		153	57
Ending balance at original discount rate		248,289	246,853
Change in discount rate assumptions		(8,766)	6,040
Balance, end of period		239,523	252,893
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		947,415	1,168,282
Beginning balance at original discount rate		996,169	990,921
Effects of actual variances from expected experience				2,538	1,998
Adjusted beginning of year balance				998,707	992,919
Issuances		6,375	5,863
Interest accrual		10,842	10,658
Benefit payments		(19,153)	(17,715)
Derecognition and other		14	(10)
Ending balance at original discount rate		996,785	991,715
Effect of changes in discount rates		(31,065)	72,720
Post-adoption liability, ending balance		965,720	1,064,435
Net liability for future policy benefits		726,197	811,542
Permanent Limited Pay | Home Service Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		13,255	10,196
Beginning balance at original discount rate		14,394	9,532
Effects of actual variances from expected experience				(809)	(1,083)
Adjusted beginning of year balance				13,585	8,449
Issuances		1,176	711
Interest accrual		114	43
Net premiums collected		467	1,610
Derecognition and other		46	24
Ending balance at original discount rate		15,388	10,837
Change in discount rate assumptions		(873)	(112)
Balance, end of period		14,515	10,725
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		116,356	161,715
Beginning balance at original discount rate		121,908	117,425
Effects of actual variances from expected experience				25	625
Adjusted beginning of year balance				121,933	118,050
Issuances		1,176	708
Interest accrual		1,410	1,349
Benefit payments		(1,748)	(2,057)
Derecognition and other		45	24
Ending balance at original discount rate		122,816	118,074
Effect of changes in discount rates		(3,712)	23,076
Post-adoption liability, ending balance		119,104	141,150
Net liability for future policy benefits		104,589	130,425
Permanent Limited Pay | Life Insurance:
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of year		10,209	4,939
Beginning balance at original discount rate		10,682	5,093
Effects of actual variances from expected experience				365	422
Adjusted beginning of year balance				11,047	5,515
Issuances		759	1,121
Interest accrual		72	(2)
Net premiums collected		(751)	133
Derecognition and other		38	24
Ending balance at original discount rate		11,165	6,791
Change in discount rate assumptions		(370)	(291)
Balance, end of period		10,795	6,500
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Pre-adoption liability, beginning balance		195,612	240,679
Beginning balance at original discount rate		208,051	207,105
Effects of actual variances from expected experience				1,045	1,407
Adjusted beginning of year balance				$ 209,096	$ 208,512
Issuances		785	1,141
Interest accrual		2,112	2,125
Benefit payments		(4,873)	(3,918)
Derecognition and other		12	4
Ending balance at original discount rate		207,132	207,864
Effect of changes in discount rates		(9,459)	12,917
Post-adoption liability, ending balance		197,673	220,781
Net liability for future policy benefits		$ 186,878	$ 214,281