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Summary of Significant Accounting Policies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Subsidiary
Dec. 31, 2017
USD ($)
Principles of Consolidation [Abstract]    
Number of insurance subsidiaries owned by the parent | Subsidiary 4  
Number of non-insurance subsidiaries owned by the parent | Subsidiary 1  
Intangibles [Abstract]    
Impairment of intangible assets $ 0  
Investments:    
Estimated fair value $ 1,066 $ 1,369
Recently Issued Accounting Standards [Abstract]    
Federal corporate tax rate 21.00% 35.00%
Reduction in tax rate 14.00%  
Adoption of New Accounting Pronouncements [Abstract]    
Classified distributions from equity method investees as cash flows from operating activities $ 10,777 $ 9,535
Cash flows from investing activities (14,787) 593
Cash flows from operating activities 4,460 12,169
Revenues within scope of updated accounting guidance 185,553 181,114
ASU 2016-01 [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Cumulative effect adjustment to AOCI and Retained Earnings   0
ASU 2016-01 [Member] | Retained Earnings [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Cumulative effect adjustment to AOCI and Retained Earnings   9,825
ASU 2016-01 [Member] | Accumulated Other Comprehensive Income [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Cumulative effect adjustment to AOCI and Retained Earnings   (9,825)
ASU 2018-02 [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Reclassification of standard tax effects on AOCI and retained earnings   0
ASU 2018-02 [Member] | Retained Earnings [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Reclassification of standard tax effects on AOCI and retained earnings   (2,100)
ASU 2018-02 [Member] | Accumulated Other Comprehensive Income [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Reclassification of standard tax effects on AOCI and retained earnings   2,100
ASU 2016-15 [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Classified distributions from equity method investees as cash flows from operating activities 10,777  
Cash flows from investing activities   (9,535)
Cash flows from operating activities   $ 9,535
ASU 2014-09 [Member]    
Adoption of New Accounting Pronouncements [Abstract]    
Revenues within scope of updated accounting guidance $ 113  
Revenues within scope of updated accounting guidance, as a percentage of total revenues (less than) 0.10%  
ASU 2016-02 [Member]    
Recently Issued Accounting Standards [Abstract]    
Percentage of right-of-use asset 2.00%  
Percentage of lease liability 2.00%