Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans held for sale	$ 221	$ 0
Collateral-dependent impaired loans	1,271	1,661
Foreclosed properties	17,851	17,992
Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans		518
Foreclosed properties	1,677	1,493
Construction And Development Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	941	940
Foreclosed properties	15,712	16,177
Residential Real Estate Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	330	203
Foreclosed properties	462	322
Fair Value Inputs Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans held for sale	0	0
Collateral-dependent impaired loans	0	0
Foreclosed properties	0	0
Fair Value Inputs Level 1 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans		0
Foreclosed properties	0	0
Fair Value Inputs Level 1 [Member] | Construction And Development Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	0	0
Foreclosed properties	0	0
Fair Value Inputs Level 1 [Member] | Residential Real Estate Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	0	0
Foreclosed properties	0	0
Fair Value Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans held for sale	221	0
Collateral-dependent impaired loans	1,144	1,661
Foreclosed properties	17,851	17,992
Fair Value Inputs Level 2 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans		518
Foreclosed properties	1,677	1,493
Fair Value Inputs Level 2 [Member] | Construction And Development Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	941	940
Foreclosed properties	15,712	16,177
Fair Value Inputs Level 2 [Member] | Residential Real Estate Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	203	203
Foreclosed properties	462	322
Fair Value Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans held for sale	0	0
Collateral-dependent impaired loans	127	0
Foreclosed properties	0	0
Fair Value Inputs Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans		0
Foreclosed properties	0	0
Fair Value Inputs Level 3 [Member] | Construction And Development Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	0	0
Foreclosed properties	0	0
Fair Value Inputs Level 3 [Member] | Residential Real Estate Financial Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	127	0
Foreclosed properties	$ 0	$ 0