Loans (Summary of Performing and Nonperforming TDRs Modified During the Period) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Loans	Dec. 31, 2011 Loans
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	174	170
Performing and nonperforming modified TDRs, Pre-modification recorded investment	$ 27,400	$ 21,520
Performing and nonperforming modified TDRs, Post-modification recorded investment	27,140	21,102
Commercial [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	52	19
Performing and nonperforming modified TDRs, Pre-modification recorded investment	7,506	4,708
Performing and nonperforming modified TDRs, Post-modification recorded investment	7,506	4,708
Real estate commercial [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	29	25
Performing and nonperforming modified TDRs, Pre-modification recorded investment	7,651	6,267
Performing and nonperforming modified TDRs, Post-modification recorded investment	7,651	6,267
Land development [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	4	0
Performing and nonperforming modified TDRs, Pre-modification recorded investment	3,991	0
Performing and nonperforming modified TDRs, Post-modification recorded investment	3,991	0
Commercial loan portfolio [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	85	44
Performing and nonperforming modified TDRs, Pre-modification recorded investment	19,148	10,975
Performing and nonperforming modified TDRs, Post-modification recorded investment	19,148	10,975
Consumer loan portfolio (real estate residential) [Member] | Consumer Portfolio Segment [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	89	126
Performing and nonperforming modified TDRs, Pre-modification recorded investment	8,252	10,545
Performing and nonperforming modified TDRs, Post-modification recorded investment	$ 7,992	$ 10,127