Fair Value Measurements And Fair Values Of Financial Instruments (Fair Value Inputs, Assets, Quantitative Information) (Details) - Other Real Estate Owned [Member] - Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 32	$ 90
Fair Value Measurements, Valuation Techniques	Sales Contract
Cost To Sell [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate		8.00%
Weighted Average [Member] | Cost To Sell [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate		8.00%