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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Mar. 23, 2018
Dec. 31, 2017
Dec. 31, 2016
Minimum        
Goodwill and Intangible Assets [Line Items]        
Finite-lived intangible assets, useful life 2 years      
Maximum        
Goodwill and Intangible Assets [Line Items]        
Finite-lived intangible assets, useful life 15 years      
Weighted Average        
Goodwill and Intangible Assets [Line Items]        
Finite-lived intangible assets, useful life 6 years 7 months 6 days      
Equity Method Investments        
Goodwill and Intangible Assets [Line Items]        
Goodwill $ 10,598   $ 7,818 $ 7,818
Equity Method Investments | TWFG Holding Company LLC        
Goodwill and Intangible Assets [Line Items]        
Finite-lived intangible assets   $ 2,000    
Indefinite-lived intangible assets   9,100    
Goodwill   $ 2,800