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Statutory Accounting and Dividend Restrictions - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Primerica Life [Member] | TENNESSEE        
Statutory Accounting Practices [Line Items]        
Statutory accounting practices, statutory net income amount $ 547,900 $ 398,800 $ 392,400  
Payments of dividends 150,000      
Payments of ordinary dividends 50,000      
Statutory accounting practices, statutory amount available for dividend payments without regulatory approval       $ 176,500
Statutory accounting practices, statutory capital and surplus, balance 674,165 598,001    
Peach Re [Member] | VERMONT        
Statutory Accounting Practices [Line Items]        
State insurance department, statutory to NAIC, amount of reconciling item 299,600      
Primerica Life Canada [Member] | CANADA        
Statutory Accounting Practices [Line Items]        
Statutory accounting practices, statutory amount available for dividend payments without regulatory approval       $ 56,600
Statutory accounting practices, statutory capital and surplus, balance $ 377,600 $ 331,300