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Deposits - Schedule of Deposits (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Banking and Thrift [Abstract]    
Non-interest-bearing demand $ 771,138 $ 723,794
Interest-bearing demand 1,421,064 1,219,381
Money market accounts 262,194 259,694
Savings and club deposits 464,089 510,688
Certificates of deposit 1,864,837 1,700,316
Total deposits $ 4,783,322 $ 4,413,873