Deferred Acquisition Costs - Deferred Policy Acquisition Costs to Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 5,654,438	$ 5,535,697	$ 5,191,683		$ 4,587,547	$ 4,595,444
Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	4,952,262	4,844,291	4,528,420	$ 4,412,015	3,983,021	3,982,159
Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	697,958	686,763	657,275	649,082	596,217	610,069
Annuity
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	4,218		5,988		8,309	3,216
United American | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	76,388	77,394	80,204	81,140	65,020	74,353
Family Heritage | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	425,145	416,608	394,925	388,967	364,751	364,751
American Income | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	2,332,600	2,258,291	2,042,907	1,960,254	1,647,761	1,647,761
American Income | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	59,890	57,811	51,820	49,406	39,477	39,477
DTC | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,699,588	1,676,931	1,608,739	1,583,695	1,498,970	1,498,435
DTC | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,807	1,854	1,988	2,032	2,215	6,600
Liberty National | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	622,532	610,723	575,838	566,419	531,504	531,504
Liberty National | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	134,728	133,096	128,338	127,537	124,754	124,888
Other | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 297,542	$ 298,346	$ 300,936	$ 301,647	$ 304,786	$ 304,459