Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 segment	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of segments | segment	4	3
Percentage of revenue		1.00%
Segment Reporting Information [Line Items]
Premium		$ 4,666,272	$ 4,456,017	$ 4,310,242
Premium		4,666,272	$ 4,456,017	4,310,241
Annuity		$ 1
Total premium				$ 4,310,242
% of Total		100.00%	100.00%	100.00%
Life
Segment Reporting Information [Line Items]
Premium		$ 3,261,347	$ 3,137,244
Premium		$ 3,261,347	$ 3,137,244	$ 3,027,824
% of Total		100.00%	100.00%	100.00%
Health
Segment Reporting Information [Line Items]
Premium		$ 1,404,925	$ 1,318,773
Premium		$ 1,404,925	$ 1,318,773	$ 1,282,417
% of Total		100.00%	100.00%	100.00%
American Income
Segment Reporting Information [Line Items]
Premium		$ 1,821,332	$ 1,709,034	$ 1,622,387
% of Total		39.00%	38.00%	38.00%
American Income | Life
Segment Reporting Information [Line Items]
Premium		$ 1,698,209	$ 1,588,702	$ 1,505,034
% of Total		52.00%	51.00%	50.00%
American Income | Health
Segment Reporting Information [Line Items]
Premium		$ 123,123	$ 120,332	$ 117,353
% of Total		9.00%	9.00%	9.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium		$ 1,060,515	$ 1,059,981	$ 1,056,617
% of Total		23.00%	24.00%	24.00%
Direct to Consumer | Life
Segment Reporting Information [Line Items]
Premium		$ 988,522	$ 991,406	$ 985,488
% of Total		30.00%	32.00%	33.00%
Direct to Consumer | Health
Segment Reporting Information [Line Items]
Premium		$ 71,993	$ 68,575	$ 71,129
% of Total		5.00%	5.00%	5.00%
Liberty National
Segment Reporting Information [Line Items]
Premium		$ 561,442	$ 537,670	$ 514,710
% of Total		12.00%	12.00%	12.00%
Liberty National | Life
Segment Reporting Information [Line Items]
Premium		$ 371,061	$ 349,736	$ 327,469
% of Total		12.00%	11.00%	11.00%
Liberty National | Health
Segment Reporting Information [Line Items]
Premium		$ 190,381	$ 187,934	$ 187,241
% of Total		14.00%	14.00%	15.00%
United American
Segment Reporting Information [Line Items]
Premium		$ 598,374	$ 553,034	$ 547,840
% of Total		13.00%	13.00%	13.00%
United American | Life
Segment Reporting Information [Line Items]
Premium		$ 6,600	$ 7,311	$ 7,966
% of Total		0.00%	0.00%	0.00%
United American | Health
Segment Reporting Information [Line Items]
Premium		$ 591,774	$ 545,723	$ 539,874
% of Total		42.00%	42.00%	42.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium		$ 434,315	$ 402,343	$ 372,406
% of Total		9.00%	9.00%	9.00%
Family Heritage | Life
Segment Reporting Information [Line Items]
Premium		$ 6,661	$ 6,134	$ 5,586
% of Total		0.00%	0.00%	0.00%
Family Heritage | Health
Segment Reporting Information [Line Items]
Premium		$ 427,654	$ 396,209	$ 366,820
% of Total		30.00%	30.00%	29.00%
Other
Segment Reporting Information [Line Items]
Premium		$ 190,294	$ 193,955	$ 196,281
% of Total		4.00%	4.00%	4.00%
Other | Life
Segment Reporting Information [Line Items]
Premium		$ 190,294	$ 193,955	$ 196,281
% of Total		6.00%	6.00%	6.00%
Other | Health
Segment Reporting Information [Line Items]
Premium		$ 0	$ 0	$ 0
% of Total		0.00%	0.00%	0.00%