Deferred Acquisition Costs - Schedule of Deferred Policy Acquisition Costs to Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 6,999,136	$ 6,495,589	$ 6,009,477
Life
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	6,147,750	5,700,755	5,271,775	$ 4,844,291
Life | American Income
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	3,248,907	2,900,229	2,573,370	2,258,291
Life | DTC
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,818,120	1,781,230	1,737,117	1,676,931
Life | Liberty National
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	790,987	728,790	666,419	610,723
Life | Other
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	289,736	290,506	294,869	298,346
Health
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	851,386	793,421	734,735	686,763
Health | United American
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	67,952	70,530	73,489	77,394
Health | Family Heritage
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	543,379	496,119	452,843	416,608
Health | American Income
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	86,446	76,319	66,783	57,811
Health | DTC
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	1,399	1,533	1,679	1,854
Health | Liberty National
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	152,210	148,920	139,941	$ 133,096
Annuity Segment
Deferred Policy Acquisition Cost [Line Items]
Deferred acquisition costs	$ 0	$ 1,413	$ 2,967