v3.8.0.1
Deposits - Summary of Outstanding Balance of Deposits and Average Rates (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deposits [Abstract]    
Demand deposits, Noninterest-bearing $ 1,097,196 $ 661,781
Demand deposits, Interest-bearing 235,294 194,274
Money market and savings 1,210,240 941,344
Certificates of deposits 900,797 629,396
Total $ 3,443,527 $ 2,426,795
Demand deposits, Interest-bearing, Weighted Average Rate 0.411% 0.471%
Money market and savings, Weighted Average Rate 0.84% 0.677%
Certificates of deposits, Weighted Average Rate 1.189% 0.589%
Total, Weighted Average Rate 0.634% 0.453%