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Fair Value of Financial Instruments (Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Investment Securities - available for sale [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure, Recurring $ 15,152 $ 15,277
Fair Value Measurements, Significant Assumptions Discount Rate Discount Rate
Valuation Technique Discounted Cash Flow Discounted Cash Flow
Fair Value Input, Unobservable Input Value, Description Range of LIBOR+ 4.50%  
Impaired Loans [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure, Nonrecurring $ 8,087 $ 1,316
Fair Value Measurements, Significant Assumptions Marketability Discount Marketability Discount
Valuation Technique Market Comparable Properties Market Comparable Properties
Fair Value Inputs, Comparability Adjustments, Weighted Average 12.80% 12.80%
Other Real Estate Owned [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure, Nonrecurring $ 786 $ 2,707
Fair Value Measurements, Significant Assumptions Marketability Discount Marketability Discount
Valuation Technique Market Comparable Properties Market Comparable Properties
Fair Value Inputs, Comparability Adjustments, Weighted Average 14.60% 13.50%
Minimum [Member] | Investment Securities - available for sale [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Discount Rate 4.50% 4.50%
Minimum [Member] | Impaired Loans [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Comparability Adjustments [1] 10.00% 10.00%
Minimum [Member] | Other Real Estate Owned [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Comparability Adjustments [1] 10.00% 10.00%
Maximum [Member] | Impaired Loans [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Comparability Adjustments [1] 15.00% 15.00%
Maximum [Member] | Other Real Estate Owned [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Comparability Adjustments 15.00% [1] 15.00%
[1] Range would include discounts taken since appraisal and estimated values