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Deposits - Schedule of Components of Weighted Average Interest Rate and Balance of Deposits (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Weighted Average Rate Domestic Deposit Liabilities [Abstract]    
Noninterest-bearing deposits 0.00% 0.00%
Demand deposits 1.17% 1.01%
Savings deposits 0.45% 0.33%
Time Deposits 1.86% 1.76%
Deposits 0.81% 0.73%
Deposits    
Noninterest-bearing deposits $ 1,103,674 $ 1,055,919
Demand deposits 1,441,540 1,377,171
Savings deposits 819,255 782,766
Time deposits 638,684 670,077
Total deposits $ 4,003,153 $ 3,885,933