Securities (Summary Of Amortized Cost, Unrealized Gains, Unrealized Losses And Estimated Fair Values) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	$ 276,793	$ 290,603	$ 289,614
Available for sale securities, Unrealized Gains	6,863	4,809	3,851
Available for sale securities, Unrealized Losses	1,255	4,154	4,685
Available for sale securities, Estimated Fair Value	282,401	291,258	288,780
U S Government Corporations And Agencies Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	22,643	27,740	29,100
Available for sale securities, Unrealized Gains	919	757	675
Available for sale securities, Unrealized Losses	47	67	118
Available for sale securities, Estimated Fair Value	23,515	28,430	29,657
Government Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	153,095	149,569	155,270
Available for sale securities, Unrealized Gains	2,680	2,444	2,019
Available for sale securities, Unrealized Losses	891	1,226	1,573
Available for sale securities, Estimated Fair Value	154,884	150,787	155,716
Nongovernment Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	9,873	13,134	11,519
Available for sale securities, Unrealized Gains	323	315	321
Available for sale securities, Unrealized Losses	28	9	21
Available for sale securities, Estimated Fair Value	10,168	13,440	11,819
U S States And Political Subdivisions General Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	3,856	9,064	9,317
Available for sale securities, Unrealized Gains	16	0	0
Available for sale securities, Unrealized Losses	66	383	475
Available for sale securities, Estimated Fair Value	3,806	8,681	8,842
State and Policital Subdivisions Water and Sewer Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	2,375	3,234	3,229
Available for sale securities, Unrealized Gains	5	1	0
Available for sale securities, Unrealized Losses	36	91	114
Available for sale securities, Estimated Fair Value	2,344	3,144	3,115
State and Policital Subdivisions Other Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	3,927	3,298	4,051
Available for sale securities, Unrealized Gains	29	0	4
Available for sale securities, Unrealized Losses	12	112	142
Available for sale securities, Estimated Fair Value	3,944	3,186	3,913
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	0	3,970	3,973
Available for sale securities, Unrealized Gains	0	25	24
Available for sale securities, Unrealized Losses	0	45	31
Available for sale securities, Estimated Fair Value	0	3,950	3,966
Taxable Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	195,769	210,009	216,459
Available for sale securities, Unrealized Gains	3,972	3,542	3,043
Available for sale securities, Unrealized Losses	1,080	1,933	2,474
Available for sale securities, Estimated Fair Value	198,661	211,618	217,028
State and Political Subdivisions General Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	46,610	49,569	41,156
Available for sale securities, Unrealized Gains	2,047	1,048	675
Available for sale securities, Unrealized Losses	62	1,112	1,154
Available for sale securities, Estimated Fair Value	48,595	49,505	40,677
State and Political Subdivisions Water and Sewer Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	12,436	10,132	8,996
Available for sale securities, Unrealized Gains	224	89	15
Available for sale securities, Unrealized Losses	25	290	306
Available for sale securities, Estimated Fair Value	12,635	9,931	8,705
State and Political Subdivisions Lease Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	5,060	8,869	7,956
Available for sale securities, Unrealized Gains	65	1	0
Available for sale securities, Unrealized Losses	38	441	391
Available for sale securities, Estimated Fair Value	5,087	8,429	7,565
State and Political Subdivisions Lottery/casino Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	4,287	4,457	4,443
Available for sale securities, Unrealized Gains	115	68	63
Available for sale securities, Unrealized Losses	0	166	169
Available for sale securities, Estimated Fair Value	4,402	4,359	4,337
State and Political Subdivisions Other Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	12,624	7,490	10,527
Available for sale securities, Unrealized Gains	440	61	55
Available for sale securities, Unrealized Losses	50	212	191
Available for sale securities, Estimated Fair Value	13,014	7,339	10,391
Tax Exempt Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	81,017	80,517	73,078
Available for sale securities, Unrealized Gains	2,891	1,267	808
Available for sale securities, Unrealized Losses	175	2,221	2,211
Available for sale securities, Estimated Fair Value	83,733	79,563	71,675
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	7	77	77
Available for sale securities, Unrealized Gains	0	0	0
Available for sale securities, Unrealized Losses	0	0	0
Available for sale securities, Estimated Fair Value	$ 7	$ 77	$ 77