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Deposits - Schedule of Deposits (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Banking and Thrift [Abstract]    
Non-interest bearing transaction $ 716,352 $ 681,869
Interest bearing transaction 1,225,776 1,370,403
Money market deposit accounts 281,059 262,396
Savings, including club deposits 518,787 544,765
Certificates of deposit 1,630,371 1,403,882
Total deposits $ 4,372,345 $ 4,263,315