Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($) segment	Mar. 31, 2025 USD ($)
Segment Reporting [Abstract]
Number of segments | segment	3
Segment Reporting Information [Line Items]
Premium	$ 1,270,113	$ 1,199,654
% of Total	100.00%	100.00%
American Income
Segment Reporting Information [Line Items]
Premium	$ 490,319	$ 468,557
% of Total	38.00%	39.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 264,868	$ 264,576
% of Total	21.00%	22.00%
Liberty National
Segment Reporting Information [Line Items]
Premium	$ 147,464	$ 144,104
% of Total	12.00%	12.00%
United American
Segment Reporting Information [Line Items]
Premium	$ 196,146	$ 161,440
% of Total	15.00%	13.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 125,182	$ 114,080
% of Total	10.00%	10.00%
Other
Segment Reporting Information [Line Items]
Premium	$ 46,134	$ 46,897
% of Total	4.00%	4.00%
Life
Segment Reporting Information [Line Items]
Premium	$ 853,205	$ 829,863
% of Total	100.00%	100.00%
Life | American Income
Segment Reporting Information [Line Items]
Premium	$ 459,200	$ 437,866
% of Total	54.00%	53.00%
Life | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 244,223	$ 245,600
% of Total	29.00%	30.00%
Life | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 99,885	$ 96,182
% of Total	12.00%	11.00%
Life | United American
Segment Reporting Information [Line Items]
Premium	$ 1,720	$ 1,592
% of Total	0.00%	0.00%
Life | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 2,043	$ 1,726
% of Total	0.00%	0.00%
Life | Other
Segment Reporting Information [Line Items]
Premium	$ 46,134	$ 46,897
% of Total	5.00%	6.00%
Health
Segment Reporting Information [Line Items]
Premium	$ 416,908	$ 369,791
% of Total	100.00%	100.00%
Health | American Income
Segment Reporting Information [Line Items]
Premium	$ 31,119	$ 30,691
% of Total	7.00%	8.00%
Health | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 20,645	$ 18,976
% of Total	5.00%	5.00%
Health | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 47,579	$ 47,922
% of Total	11.00%	13.00%
Health | United American
Segment Reporting Information [Line Items]
Premium	$ 194,426	$ 159,848
% of Total	47.00%	43.00%
Health | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 123,139	$ 112,354
% of Total	30.00%	31.00%
Health | Other
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%