Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of segments | segment	3
Segment Reporting Information [Line Items]
Premium	$ 4,890,220	$ 4,666,272	$ 4,456,017
% of Total	100.00%	100.00%	100.00%
American Income
Segment Reporting Information [Line Items]
Premium	$ 1,916,303	$ 1,821,332	$ 1,709,034
% of Total	39.00%	39.00%	38.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 1,057,520	$ 1,060,515	$ 1,059,981
% of Total	21.00%	23.00%	24.00%
Liberty National
Segment Reporting Information [Line Items]
Premium	$ 580,562	$ 561,442	$ 537,670
% of Total	12.00%	12.00%	12.00%
United American
Segment Reporting Information [Line Items]
Premium	$ 672,946	$ 598,374	$ 553,034
% of Total	14.00%	13.00%	13.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 475,467	$ 434,315	$ 402,343
% of Total	10.00%	9.00%	9.00%
Other
Segment Reporting Information [Line Items]
Premium	$ 187,422	$ 190,294	$ 193,955
% of Total	4.00%	4.00%	4.00%
Life
Segment Reporting Information [Line Items]
Premium	$ 3,363,470	$ 3,261,347
% of Total	100.00%	100.00%	100.00%
Life | American Income
Segment Reporting Information [Line Items]
Premium	$ 1,791,356	$ 1,698,209	$ 1,588,702
% of Total	53.00%	52.00%	51.00%
Life | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 981,006	$ 988,522	$ 991,406
% of Total	29.00%	30.00%	32.00%
Life | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 390,094	$ 371,061	$ 349,736
% of Total	12.00%	12.00%	11.00%
Life | United American
Segment Reporting Information [Line Items]
Premium	$ 6,188	$ 6,600	$ 7,311
% of Total	0.00%	0.00%	0.00%
Life | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 7,404	$ 6,661	$ 6,134
% of Total	0.00%	0.00%	0.00%
Life | Other
Segment Reporting Information [Line Items]
Premium	$ 187,422	$ 190,294	$ 193,955
% of Total	6.00%	6.00%	6.00%
Health
Segment Reporting Information [Line Items]
Premium	$ 1,526,750	$ 1,404,925
% of Total	100.00%	100.00%	100.00%
Health | American Income
Segment Reporting Information [Line Items]
Premium	$ 124,947	$ 123,123	$ 120,332
% of Total	8.00%	9.00%	9.00%
Health | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 76,514	$ 71,993	$ 68,575
% of Total	5.00%	5.00%	5.00%
Health | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 190,468	$ 190,381	$ 187,934
% of Total	12.00%	14.00%	14.00%
Health | United American
Segment Reporting Information [Line Items]
Premium	$ 666,758	$ 591,774	$ 545,723
% of Total	44.00%	42.00%	42.00%
Health | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 468,063	$ 427,654	$ 396,209
% of Total	31.00%	30.00%	30.00%
Health | Other
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%