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Securities Sold Under Agreements to Repurchase (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Federal Home Loan Bank, Advances [Line Items]    
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned $ 1,106 $ 1,049
Federal Home Loan Bank Advances [Member] | Period One [Member]    
Federal Home Loan Bank, Advances [Line Items]    
Debt, Long-term and Short-term, Combined Amount 15,000 20,000
Collateral Pledged [Member]    
Federal Home Loan Bank, Advances [Line Items]    
Debt Securities, Available-for-sale, Restricted $ 2,600 $ 2,700