Condensed Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 125,106	$ 112,384
Unrealized investment gains (losses) on available-for-sale securities:
Change in unrealized holding gains (losses) on available-for-sale securities	38,549	(164,937)
Reclassification adjustment for investment (gains) losses included in net income	3,137	(658)
Effect of change in discount rate assumptions on the liability for future policy benefits	(182,045)	821,904
Foreign currency translation adjustments:
Change in unrealized foreign currency translation gains (losses)	998	3,289
Total other comprehensive income (loss) before income taxes	(139,361)	659,598
Income tax expense (benefit) related to items of other comprehensive income (loss)	(30,096)	140,384
Other comprehensive income (loss), net of income taxes	(109,265)	519,214
Total comprehensive income (loss)	15,841	631,598
Net income (loss) attributable to noncontrolling interests		(2,655)
Comprehensive income (loss) attributable to Primerica, Inc.	$ 15,841	$ 634,253