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Loans Receivable and Allowance for Loan Losses (Changes in the Accretable Yield for Purchased Credit Impaired Loans) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Loans Receivable and Allowance for Loan Losses [Abstract]    
Balance at beginning of period $ 108 $ 208
Additions
Accretion (56) (73)
Reclassification and other (23) (27)
Balance at end of period $ 29 $ 108