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Deposits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Interest Expense, Deposits [Abstract]      
Interest bearing checking accounts $ 442 $ 478 $ 473
Savings accounts 1,657 1,729 2,148
Time deposits and money market accounts 16,859 10,983 11,592
Total 18,958 13,190 $ 14,213
Maturity of Time Deposits [Abstract]      
Under 1 year 941,376    
1 to 2 years 276,224    
2 to 3 years 48,048    
3 to 4 years 4,815    
4 to 5 years 3,747    
Over 5 years 296    
Total time deposits 1,274,506 1,066,966  
Amount included in time deposits with balance in excess of $250,000 $ 182,200 $ 136,800