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Title Insurance Business - Additional Information (Details)
9 Months Ended 12 Months Ended
Aug. 01, 2018
USD ($)
Feb. 01, 2017
USD ($)
business
shares
Oct. 31, 2017
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]            
Business combination contingent consideration fair value adjustment         $ (260,000) $ 1,950,000
Goodwill, impairment loss           7,278,000
Intangible assets       $ 0 0 0
Salaries and employee benefits       90,634,000 77,411,000 74,669,000
Reltco            
Business Acquisition [Line Items]            
Number of businesses acquired | business   2        
Asset book value   $ 5,766,000        
Liabilities assumed   4,681,000        
Consideration transferred   12,700,000        
Payments to acquire businesses, gross   $ 7,798,000        
Number of shares issued (in shares) | shares   27,724        
Contingent number of shares to be issued (up to) (in shares) | shares   184,012        
Contingent consideration, liability, cash   $ 3,800,000        
Contingent consideration in acquisition of controlling interest in equity method investment   4,300,000     0 1,900,000
Contingent consideration, target net income   $ 6,000,000.0        
Contingent consideration, earn-out period (in years)   4 years        
Contingent consideration, liability   $ 4,300,000        
Business combination contingent consideration fair value adjustment     $ 350,000      
Acquisition related costs       0 $ 0 766,000
Goodwill, impairment loss       7,300,000    
Intangible assets       $ 720,000    
Contingent consideration liability           4,400,000
Salaries and employee benefits           $ 1,600,000
Financing receivables $ 3,000,000.0          
Reltco | Customer Relationships            
Business Acquisition [Line Items]            
Finite-lived intangible assets acquired   3,900,000        
Reltco | Noncompete Agreements            
Business Acquisition [Line Items]            
Finite-lived intangible assets acquired   405,000        
Reltco | Trade Names            
Business Acquisition [Line Items]            
Indefinite-lived intangible assets acquired   $ 1,200,000        
Reltco | Expected Term            
Business Acquisition [Line Items]            
Contingent consideration liability, term           3 years
Reltco | Expected Volatility Rate            
Business Acquisition [Line Items]            
Contingent consideration liability, measurement input           0.2500
Reltco | Expected Dividend Rate            
Business Acquisition [Line Items]            
Contingent consideration liability, measurement input           0.0051
Reltco | Monte Carlo Simulation | Contingent Consideration Earn-out | Expected Term            
Business Acquisition [Line Items]            
Contingent consideration liability, term   4 years 3 years 3 months      
Reltco | Monte Carlo Simulation | Contingent Consideration Earn-out | Expected Volatility Rate            
Business Acquisition [Line Items]            
Contingent consideration liability, measurement input   0.3000 0.3000      
Reltco | Monte Carlo Simulation | Contingent Consideration Earn-out | Expected Dividend Rate            
Business Acquisition [Line Items]            
Contingent consideration liability, measurement input   0.0040 0.0051      
Reltco | Scenario, Previously Reported            
Business Acquisition [Line Items]            
Consideration transferred   $ 15,800,000