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Summary of Significant Accounting Policies (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Segment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Segment
Description of Business [Abstract]        
Number of reportable segments | Segment   1   2
Goodwill and Other Intangible Assets [Abstract]        
Goodwill impairment loss $ 3,152 $ 3,152 $ 0 $ 0
Insurance Company-Owned Life Insurance [Abstract]        
Insurance company-owned life insurance 10,000 10,000    
Commercial Mortgage Loans [Member]        
Investments [Abstract]        
Commercial mortgage loans, valuation allowance $ 0 $ 0