Loans (Summary Of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Loans [Line Items]
Average Recorded Investment	$ 56,023	$ 81,722
Interest Income Recognized	917	1,982
Recorded Investment	49,364	65,186
Unpaid Principal Balance	57,200	72,651
Related Allowance	2,984	5,856
With No Related Allowance Recorded [Member] | Commercial [Member]
Loans [Line Items]
Average Recorded Investment	985	2,499
Interest Income Recognized	5	18
Recorded Investment	326	1,111
Unpaid Principal Balance	430	1,147
With No Related Allowance Recorded [Member] | Agriculture [Member]
Loans [Line Items]
Average Recorded Investment	79	463
Interest Income Recognized	5	7
Recorded Investment	94	109
Unpaid Principal Balance	94	109
With No Related Allowance Recorded [Member] | Consumer Installment Loans [Member]
Loans [Line Items]
Average Recorded Investment	73	83
Interest Income Recognized	1	10
Recorded Investment	29	98
Unpaid Principal Balance	29	98
With No Related Allowance Recorded [Member] | All Other Loans [Member]
Loans [Line Items]
Average Recorded Investment
Interest Income Recognized
Recorded Investment
Unpaid Principal Balance
Related Allowance
With No Related Allowance Recorded [Member] | Real Estate [Member] | Commercial [Member]
Loans [Line Items]
Average Recorded Investment	18,427	26,662
Interest Income Recognized	364	829
Recorded Investment	18,231	20,389
Unpaid Principal Balance	18,957	21,434
With No Related Allowance Recorded [Member] | Real Estate [Member] | Construction And Land Development [Member]
Loans [Line Items]
Average Recorded Investment	3,281	4,759
Interest Income Recognized	50	118
Recorded Investment	3,167	3,759
Unpaid Principal Balance	8,150	8,618
With No Related Allowance Recorded [Member] | Real Estate [Member] | Residential 1-4 Family [Member]
Loans [Line Items]
Average Recorded Investment	5,231	7,824
Interest Income Recognized	66	227
Recorded Investment	3,534	6,308
Unpaid Principal Balance	3,925	6,567
With No Related Allowance Recorded [Member] | Real Estate [Member] | Multifamily [Member]
Loans [Line Items]
Average Recorded Investment	869	1,021
Interest Income Recognized	13	44
Recorded Investment	482	928
Unpaid Principal Balance	482	998
With No Related Allowance Recorded [Member] | Real Estate [Member] | Farmland [Member]
Loans [Line Items]
Average Recorded Investment	4,363	7,748
Interest Income Recognized	86	168
Recorded Investment	5,426	4,375
Unpaid Principal Balance	5,678	4,810
With An Allowance Recorded [Member] | Commercial [Member]
Loans [Line Items]
Average Recorded Investment	1,112	1,689
Interest Income Recognized	1	19
Recorded Investment	1,101	1,881
Unpaid Principal Balance	1,621	1,885
Related Allowance	317	491
With An Allowance Recorded [Member] | Agriculture [Member]
Loans [Line Items]
Average Recorded Investment	175	373
Interest Income Recognized	2	3
Recorded Investment	47	353
Unpaid Principal Balance	47	353
Related Allowance	3	308
With An Allowance Recorded [Member] | Consumer Installment Loans [Member]
Loans [Line Items]
Average Recorded Investment	26	69
Interest Income Recognized	1	3
Recorded Investment	13	27
Unpaid Principal Balance	13	27
Related Allowance	6	16
With An Allowance Recorded [Member] | All Other Loans [Member]
Loans [Line Items]
Average Recorded Investment
Interest Income Recognized
Recorded Investment
Unpaid Principal Balance
Related Allowance
With An Allowance Recorded [Member] | Real Estate [Member] | Commercial [Member]
Loans [Line Items]
Average Recorded Investment	12,677	14,770
Interest Income Recognized	192	347
Recorded Investment	10,911	13,495
Unpaid Principal Balance	11,424	14,014
Related Allowance	1,699	3,196
With An Allowance Recorded [Member] | Real Estate [Member] | Construction And Land Development [Member]
Loans [Line Items]
Average Recorded Investment	480	1,728
Interest Income Recognized		41
Recorded Investment	376	793
Unpaid Principal Balance	399	945
Related Allowance	46	177
With An Allowance Recorded [Member] | Real Estate [Member] | Residential 1-4 Family [Member]
Loans [Line Items]
Average Recorded Investment	3,421	5,473
Interest Income Recognized	105	203
Recorded Investment	4,116	3,830
Unpaid Principal Balance	4,316	3,836
Related Allowance	556	577
With An Allowance Recorded [Member] | Real Estate [Member] | Multifamily [Member]
Loans [Line Items]
Average Recorded Investment	755	1,589
Interest Income Recognized	3	68
Recorded Investment	118	2,028
Unpaid Principal Balance	118	2,096
Related Allowance	10	456
With An Allowance Recorded [Member] | Real Estate [Member] | Farmland [Member]
Loans [Line Items]
Average Recorded Investment	4,069	4,972
Interest Income Recognized	23	(123)
Recorded Investment	1,393	5,702
Unpaid Principal Balance	1,517	5,714
Related Allowance	$ 347	$ 635