Deferred Acquisition Costs - Schedule of Deferred Policy Acquisition Costs to Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 6,495,589	$ 6,009,477	$ 5,535,697
Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	5,700,755	5,271,775	4,844,291	$ 4,412,015
Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	793,421	734,735	686,763	649,082
Annuity Segment
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,413	2,967	4,643
American Income | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	2,900,229	2,573,370	2,258,291	1,960,254
American Income | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	76,319	66,783	57,811	49,406
DTC | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,781,230	1,737,117	1,676,931	1,583,695
DTC | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,533	1,679	1,854	2,032
Liberty National | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	728,790	666,419	610,723	566,419
Liberty National | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	148,920	139,941	133,096	127,537
Other premium | Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	290,506	294,869	298,346	301,647
United American | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	70,530	73,489	77,394	81,140
Family Heritage | Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 496,119	$ 452,843	$ 416,608	$ 388,967