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Loans and Allowance for Loan Losses (Related Party Loans) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward]    
Balance, beginning of year $ 18,330 $ 12,999
Disbursements 34,639 14,533
Repayments (21,723) (9,202)
Balance, end of year $ 31,246 $ 18,330