Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 367,974	$ 371,980	$ 386,164
Unrealized investment gains (losses) on available-for-sale securities:
Change in unrealized holding gains (losses) on investment securities	(385,735)	(78,348)	78,533
Reclassification adjustment for realized investment (gains) losses included in net income	(1,387)	(3,849)	2,614
Foreign currency translation adjustments:
Change in unrealized foreign currency translation gains (losses)	(20,015)	7,033	7,343
Total other comprehensive income (loss) before income taxes	(407,137)	(75,164)	88,490
Income tax expense (benefit) related to items of other comprehensive income (loss)	(82,477)	(17,846)	17,582
Other comprehensive income (loss), net of income taxes	(324,660)	(57,318)	70,908
Total comprehensive income	43,314	314,662	457,072
Net income (loss) attributable to noncontrolling interests	(5,038)	(1,377)
Comprehensive income attributable to Primerica, Inc.	$ 48,352	$ 316,039	$ 457,072