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Investments - Textual (Details)
 3 Months Ended
Mar. 31, 2020
USD ($)
security
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Schedule of Available-for-sale Securities      
Available-for-sale Securities pledged as collateral | $ $ 89,967,000    
Unrealized gain (loss) of available-for sale securities | $ (1,886,000)   $ 3,999,000
AOCI available-for-sale securities adjustment tax | $ (558,000)   1,182,000
Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to realized net gains on available-for-sale securities | $ $ 1,241,000 $ 311,000  
Threshold period of value decline in available-for-sale securities to be considered other than temporary impairment 12 months    
Threshold percentage of value decline in available-for-sale securities to be considered other than temporary impairment 10.00%    
Threshold amount of value decline in available-for-sale securities to be considered other than temporary impairment | $ $ 10,000    
Other than temporary impairment losses on investment securities | $ 0    
Debt securities, amortized cost | $ $ 524,829,000    
U.S. Government agencies      
Schedule of Available-for-sale Securities      
Available-for-sale securities, number of positions | security 11    
Debt securities, amortized cost | $ $ 43,550,000   14,740,000
U.S. Government agencies | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 5    
U.S. Government agencies | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 5    
Obligations of states and political subdivisions      
Schedule of Available-for-sale Securities      
Available-for-sale securities, number of positions | security 66    
Debt securities, amortized cost | $ $ 200,677,000   89,574,000
Obligations of states and political subdivisions | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 15    
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations      
Schedule of Available-for-sale Securities      
Available-for-sale securities, number of positions | security 116    
Debt securities, amortized cost | $ $ 205,987,000   198,125,000
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 14    
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 17    
Private label mortgage and asset backed securities      
Schedule of Available-for-sale Securities      
Available-for-sale securities, number of positions | security 25    
Debt securities, amortized cost | $ $ 65,615,000   155,308,000
Private label mortgage and asset backed securities | Less than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 13    
Private label mortgage and asset backed securities | Greater than 12 months      
Schedule of Available-for-sale Securities      
Available-for-sale securities in unrealized loss positions, number of positions | security 1    
Corporate debt securities      
Schedule of Available-for-sale Securities      
Available-for-sale securities, number of positions | security 2    
Debt securities, amortized cost | $ $ 9,000,000   $ 9,000,000