Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of segments | segment	4
Segment Reporting Information [Line Items]
Premium	$ 1,145,284	$ 1,095,090
% of Total	100.00%	100.00%
Life
Segment Reporting Information [Line Items]
Premium	$ 804,265	$ 772,597
% of Total	100.00%	100.00%
Health
Segment Reporting Information [Line Items]
Premium	$ 341,019	$ 322,493
% of Total	100.00%	100.00%
Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
American Income
Segment Reporting Information [Line Items]
Premium	$ 444,541	$ 417,106
% of Total	39.00%	38.00%
American Income | Life
Segment Reporting Information [Line Items]
Premium	$ 414,044	$ 387,512
% of Total	52.00%	50.00%
American Income | Health
Segment Reporting Information [Line Items]
Premium	$ 30,497	$ 29,594
% of Total	9.00%	9.00%
American Income | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 265,906	$ 264,915
% of Total	23.00%	24.00%
Direct to Consumer | Life
Segment Reporting Information [Line Items]
Premium	$ 248,040	$ 247,667
% of Total	31.00%	32.00%
Direct to Consumer | Health
Segment Reporting Information [Line Items]
Premium	$ 17,866	$ 17,248
% of Total	5.00%	5.00%
Direct to Consumer | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
Liberty National
Segment Reporting Information [Line Items]
Premium	$ 138,407	$ 132,175
% of Total	12.00%	12.00%
Liberty National | Life
Segment Reporting Information [Line Items]
Premium	$ 90,777	$ 85,203
% of Total	11.00%	11.00%
Liberty National | Health
Segment Reporting Information [Line Items]
Premium	$ 47,630	$ 46,972
% of Total	14.00%	15.00%
Liberty National | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
United American
Segment Reporting Information [Line Items]
Premium	$ 143,478	$ 134,489
% of Total	13.00%	12.00%
United American | Life
Segment Reporting Information [Line Items]
Premium	$ 1,843	$ 1,882
% of Total	0.00%	0.00%
United American | Health
Segment Reporting Information [Line Items]
Premium	$ 141,635	$ 132,607
% of Total	42.00%	41.00%
United American | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 105,007	$ 97,552
% of Total	9.00%	9.00%
Family Heritage | Life
Segment Reporting Information [Line Items]
Premium	$ 1,616	$ 1,480
% of Total	0.00%	0.00%
Family Heritage | Health
Segment Reporting Information [Line Items]
Premium	$ 103,391	$ 96,072
% of Total	30.00%	30.00%
Family Heritage | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
Other
Segment Reporting Information [Line Items]
Premium	$ 47,945	$ 48,853
% of Total	4.00%	5.00%
Other | Life
Segment Reporting Information [Line Items]
Premium	$ 47,945	$ 48,853
% of Total	6.00%	7.00%
Other | Health
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%
Other | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0
% of Total	0.00%	0.00%