Condensed Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 51,807	$ 111,439	$ 236,134	$ 337,472
Unrealized investment gains (losses) on available-for-sale securities:
Change in unrealized holding gains (losses) on available-for-sale securities	(97,516)	(13,796)	(401,335)	(52,669)
Reclassification adjustment for investment (gains) losses included in net income	(154)	(1,879)	(867)	(3,052)
Foreign currency translation adjustments:
Change in unrealized foreign currency translation gains (losses)	(18,086)	(5,892)	(24,048)	6,490
Total other comprehensive income (loss) before income taxes	(115,756)	(21,567)	(426,250)	(49,231)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(20,504)	(3,386)	(85,512)	(12,294)
Other comprehensive income (loss), net of income taxes	(95,252)	(18,181)	(340,738)	(36,937)
Total comprehensive income (loss)	(43,445)	93,258	(104,604)	300,535
Net income (loss) attributable to noncontrolling interests		(1,017)	(5,038)	(1,017)
Comprehensive income (loss) attributable to Primerica, Inc.	$ (43,445)	$ 94,275	$ (99,566)	$ 301,552