Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 576,601	$ 467,030	$ 475,985
Unrealized investment gains (losses) on available-for-sale securities:
Change in unrealized holding gains (losses) on available-for-sale securities	87,390	(385,735)	(78,348)
Reclassification adjustment for investment (gains) losses included in net income	2,811	(1,387)	(3,849)
Effect of change in discount rate assumptions on the liability for future policy benefits	(216,301)	1,739,762	347,041
Foreign currency translation adjustments:
Change in unrealized foreign currency translation gains (losses)	10,044	(20,826)	6,969
Total other comprehensive income (loss) before income taxes	(116,056)	1,331,814	271,813
Income tax expense (benefit) related to items of other comprehensive income (loss)	(27,458)	288,689	56,753
Other comprehensive income (loss), net of income taxes	(88,598)	1,043,125	215,060
Total comprehensive income (loss)	488,003	1,510,155	691,045
Net income (loss) attributable to noncontrolling interests		(5,038)	(1,377)
Comprehensive income (loss) attributable to Primerica, Inc.	$ 488,003	$ 1,515,193	$ 692,422