Loans and Allowance for Loan Losses (Loans Past Due) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 4,762	$ 3,585
60-89 Days Past Due	2,206	1,014
Greater Than 90 Days	3,188	5,798
Total Past Due	10,156	10,397
Current	977,501	965,076
Total Loans Receivable	987,657	975,473	979,495
Total Loans Greater than 90 Days and Accruing	268	321
Construction and Land Development Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	112	369
60-89 Days Past Due	14	26
Greater Than 90 Days	694	817
Total Past Due	820	1,212
Current	61,296	57,533
Total Loans Receivable	62,116	58,745
Total Loans Greater than 90 Days and Accruing	0	0
Other Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	865	1,255
60-89 Days Past Due	454	294
Greater Than 90 Days	1,464	3,647
Total Past Due	2,783	5,196
Current	492,554	478,918
Total Loans Receivable	495,337	484,114
Total Loans Greater than 90 Days and Accruing	19	66
Asset-based Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Greater Than 90 Days	81	81
Total Past Due	81	81
Current	35,446	36,598
Total Loans Receivable	35,527	36,679
Total Loans Greater than 90 Days and Accruing	0	0
Other Commercial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	503	366
60-89 Days Past Due	37	50
Greater Than 90 Days	277	408
Total Past Due	817	824
Current	113,781	116,047
Total Loans Receivable	114,598	116,871
Total Loans Greater than 90 Days and Accruing	52	64
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	458	49
60-89 Days Past Due	0	0
Greater Than 90 Days	0	31
Total Past Due	458	80
Current	38,589	37,656
Total Loans Receivable	39,047	37,736
Total Loans Greater than 90 Days and Accruing	0	31
Other 1-4 Family Residential Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2,618	1,329
60-89 Days Past Due	1,657	584
Greater Than 90 Days	620	791
Total Past Due	4,895	2,704
Current	198,365	198,288
Total Loans Receivable	203,260	200,992
Total Loans Greater than 90 Days and Accruing	174	137
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	206	217
60-89 Days Past Due	44	60
Greater Than 90 Days	52	23
Total Past Due	302	300
Current	37,470	40,036
Total Loans Receivable	37,772	40,336
Total Loans Greater than 90 Days and Accruing	$ 23	$ 23