Loans And The Allowance For Credit Losses (Allowance For Loan Losses And The Recorded Investment In Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	$ 143		$ 63
Ending balance collectively evaluated for impairment	12,748		12,752
Financing receivables, Ending balance individually evaluated for impairment	1,387		791
Financing receivables, Ending balance collectively evaluated for impairment	1,202,268		1,181,543
Financing receivables, Totals	1,203,655		1,182,334
Allowance for loan losses	12,162		11,833
Reserve for undisbursed lines of credit	729		982
Total allowance for credit losses	12,891	$ 12,764	12,815	$ 12,906	$ 12,929	$ 12,828
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	3,450		3,331
Financing receivables, Ending balance individually evaluated for impairment	512		134
Financing receivables, Ending balance collectively evaluated for impairment	209,946		177,463
Financing receivables, Totals	210,458		177,597
Allowance for loan losses	2,925		2,583
Reserve for undisbursed lines of credit	525		748
Total allowance for credit losses	3,450	3,375	3,331	3,656	3,378	3,354
Municipal Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	369		636
Financing receivables, Ending balance collectively evaluated for impairment	59,035		94,366
Financing receivables, Totals	59,035		94,366
Allowance for loan losses	359		623
Reserve for undisbursed lines of credit	10		13
Total allowance for credit losses	369	543	636	386	693	768
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	143		63
Ending balance collectively evaluated for impairment	2,983		3,064
Financing receivables, Ending balance individually evaluated for impairment	875		657
Financing receivables, Ending balance collectively evaluated for impairment	453,239		468,872
Financing receivables, Totals	454,114		469,529
Allowance for loan losses	3,043		3,038
Reserve for undisbursed lines of credit	83		89
Total allowance for credit losses	3,126	3,110	3,127	3,246	3,352	3,081
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	5,354		5,251
Financing receivables, Ending balance collectively evaluated for impairment	438,622		412,447
Financing receivables, Totals	438,622		412,447
Allowance for loan losses	5,299		5,209
Reserve for undisbursed lines of credit	55		42
Total allowance for credit losses	5,354	5,217	5,251	5,089	5,119	5,085
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	533		415
Financing receivables, Ending balance collectively evaluated for impairment	38,435		23,858
Financing receivables, Totals	38,435		23,858
Allowance for loan losses	477		325
Reserve for undisbursed lines of credit	56		90
Total allowance for credit losses	533	438	415	494	360	512
Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	59		13
Financing receivables, Ending balance collectively evaluated for impairment	2,950		4,504
Financing receivables, Totals	2,950		4,504
Allowance for loan losses	59		13
Total allowance for credit losses	59	$ 81	13	18	18	18
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment			42
Financing receivables, Ending balance collectively evaluated for impairment	41		33
Financing receivables, Totals	$ 41		33
Allowance for loan losses			42
Total allowance for credit losses			$ 42	$ 17	$ 9	$ 10