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Statutory Accounting and Dividend Restrictions - Statutory Accounting Practices Disclosure (Details) - Primerica Life [Member] - TENNESSEE - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statutory Accounting Practices [Line Items]    
Statutory accounting practices, statutory capital and surplus, balance $ 674,165 $ 598,001
Statutory accounting practices, statutory unassigned surplus $ 176,463 $ 50,299