Loans (Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 9,472	$ 7,139	$ 6,616
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,676	3,728	2,836
Recorded Investment	13,148	10,867	9,452
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	10,194	7,826	7,606
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,986	3,773	2,836
Unpaid Principal Balance	14,180	11,599	10,442
Related Allowance	742	790	1,181
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	10,054	7,248	6,939
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	4,218	3,936	3,080
Average Recorded Investment	14,272	11,184	10,019
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	320	146	135
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	24	4
Interest Income Recognized	344	150	135
Commercial [Member] | Asset Quality Rating - Pass [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	125	379	327
Impaired Financing Receivable, with Related Allowance, Recorded Investment	106		185
Recorded Investment	231	379	512
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	125	379	327
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	106		185
Unpaid Principal Balance	231	379	512
Related Allowance	28		19
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	226	394	430
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	86		195
Average Recorded Investment	312	394	625
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	9	23	23
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	4
Interest Income Recognized	13	23	23
Commercial [Member] | Asset Quality Rating - Special Mention [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	328	374	140
Impaired Financing Receivable, with Related Allowance, Recorded Investment	154	258	258
Recorded Investment	482	632	398
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	328	374	140
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	154	258	258
Unpaid Principal Balance	482	632	398
Related Allowance	78	20	20
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	325	453	153
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	170	258	258
Average Recorded Investment	495	711	411
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	21	18
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Interest Income Recognized	21	18
Commercial [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	722	1,408	908
Impaired Financing Receivable, with Related Allowance, Recorded Investment		587	68
Recorded Investment	722	1,995	976
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	722	2,006	908
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		587	68
Unpaid Principal Balance	722	2,593	976
Related Allowance		44	5
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	888	1,508	1,006
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		761	234
Average Recorded Investment	888	2,269	1,240
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	4	4
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Interest Income Recognized	4	4
Commercial [Member] | Asset Quality Rating - Doubtful [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	418	771	1,118
Impaired Financing Receivable, with Related Allowance, Recorded Investment	186	229	223
Recorded Investment	604	1,000	1,341
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,061	771	1,762
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	216	229	223
Unpaid Principal Balance	1,277	1,000	1,985
Related Allowance	186	218	212
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	543	815	1,221
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	205	236	233
Average Recorded Investment	748	1,051	1,454
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized			5
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Interest Income Recognized			5
Commercial [Member] | Asset Quality Rating - Loss [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	201	772	446
Recorded Investment	201	772	446
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	201	772	446
Unpaid Principal Balance	201	772	446
Related Allowance	173	428	364
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	212	793	474
Average Recorded Investment	212	793	474
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Real Estate Construction One-To- Four Family [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	810
Recorded Investment	810
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	810
Unpaid Principal Balance	810
Related Allowance	230
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	908
Average Recorded Investment	908
Real Estate Construction Other [Member] | Asset Quality Rating - Pass [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,748
Recorded Investment	2,748
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,748
Unpaid Principal Balance	2,748
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,861
Average Recorded Investment	2,861
Real Estate Construction Other [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		431	1,349
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,568	1,006
Recorded Investment		1,999	2,355
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		431	1,527
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,613	1,006
Unpaid Principal Balance		2,044	2,533
Related Allowance		50	494
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		432	1,463
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		1,573	1,024
Average Recorded Investment		2,005	2,487
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Real Estate Term Owner Occupied [Member] | Asset Quality Rating - Special Mention [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	526
Recorded Investment	526
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	526
Unpaid Principal Balance	526
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	502
Average Recorded Investment	502
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	29
Interest Income Recognized	29
Real Estate Term Non-Owner Occupied [Member] | Asset Quality Rating - Pass [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,568	1,684	1,660
Impaired Financing Receivable, with Related Allowance, Recorded Investment		223	204
Recorded Investment	1,568	1,907	1,864
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,568	1,683	1,660
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		223	204
Unpaid Principal Balance	1,568	1,906	1,864
Related Allowance		25	5
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,614	1,525	1,513
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		224	215
Average Recorded Investment	1,614	1,749	1,728
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	95	78	93
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Interest Income Recognized	95	78	93
Real Estate Term Non-Owner Occupied [Member] | Asset Quality Rating - Special Mention [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	388	370
Impaired Financing Receivable, with Related Allowance, Recorded Investment			446
Recorded Investment	388	370	446
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	388	370
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance			446
Unpaid Principal Balance	388	370	446
Related Allowance			62
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	401	373
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment			447
Average Recorded Investment	401	373	447
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	21
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized
Interest Income Recognized	21
Real Estate Term Non-Owner Occupied [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	355	1,102	479
Recorded Investment	355	1,102	479
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	355	1,102	479
Unpaid Principal Balance	355	1,102	479
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	376	1,130	499
Average Recorded Investment	376	1,130	499
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	33
Interest Income Recognized	33
Real Estate Term Other [Member] | Asset Quality Rating - Special Mention [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,032		170
Recorded Investment	2,032		170
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,111		248
Unpaid Principal Balance	2,111		248
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,044		193
Average Recorded Investment	2,044		193
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	99
Interest Income Recognized	99
Real Estate Term Other [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		163	162
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,044
Recorded Investment	2,044	163	162
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		163	162
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,324
Unpaid Principal Balance	2,324	163	162
Related Allowance	34
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		154	154
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,461
Average Recorded Investment	2,461	154	154
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized		12	9
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	20
Interest Income Recognized	20	12	9
Real Estate Term Other [Member] | Asset Quality Rating - Doubtful [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		158	154
Recorded Investment		158	154
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		248	244
Unpaid Principal Balance		248	244
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		207	205
Average Recorded Investment		207	205
Consumer Secured By 1st Deed Of Trust [Member] | Asset Quality Rating - Pass [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	93	98	97
Impaired Financing Receivable, with Related Allowance, Recorded Investment	175
Recorded Investment	268	98	97
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	93	98	97
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	175
Unpaid Principal Balance	268	98	97
Related Allowance	13
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	95	49	49
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	176
Average Recorded Investment	271	49	49
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	4	4	5
Interest Income Recognized	4	4	5
Consumer Other [Member] | Asset Quality Rating - Pass [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	169
Recorded Investment	169
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	169
Unpaid Principal Balance	169
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	179
Average Recorded Investment	179
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	5
Interest Income Recognized	5
Consumer Other [Member] | Asset Quality Rating - Special Mention [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		57
Recorded Investment		57
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		57
Unpaid Principal Balance		57
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		60
Average Recorded Investment		60
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized		3
Interest Income Recognized		3
Consumer Other [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		92
Impaired Financing Receivable, with Related Allowance, Recorded Investment		91
Recorded Investment		183
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		92
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		91
Unpaid Principal Balance		183
Related Allowance		5
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		95
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		91
Average Recorded Investment		186
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized		4
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized		4
Interest Income Recognized		8
Consumer Other [Member] | Asset Quality Rating - Doubtful [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		52	52
Recorded Investment		52	52
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		52	52
Unpaid Principal Balance		52	52
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		53	53
Average Recorded Investment		$ 53	$ 53