Loans (Summary of Performing and Nonperforming TDRs Modified During the Period) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Loans	Dec. 31, 2013 Loans	Dec. 31, 2012 Loans
Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	219	199	300
Performing and nonperforming modified TDRs, Pre-modification recorded investment	$ 30,112	$ 35,821	$ 46,486
Performing and nonperforming modified TDRs, Post-modification recorded investment	30,086	35,718	46,226
Commercial [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	53	57	91
Performing and nonperforming modified TDRs, Pre-modification recorded investment	13,781	12,123	13,720
Performing and nonperforming modified TDRs, Post-modification recorded investment	13,781	12,123	13,720
Real estate commercial [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	46	49	77
Performing and nonperforming modified TDRs, Pre-modification recorded investment	12,075	16,222	17,328
Performing and nonperforming modified TDRs, Post-modification recorded investment	12,075	16,222	17,328
Real Estate Construction Loans [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans		4
Performing and nonperforming modified TDRs, Pre-modification recorded investment		575
Performing and nonperforming modified TDRs, Post-modification recorded investment		575
Land development [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	1	4	11
Performing and nonperforming modified TDRs, Pre-modification recorded investment	72	1,958	5,494
Performing and nonperforming modified TDRs, Post-modification recorded investment	72	1,958	5,494
Commercial loan portfolio [Member] | Commercial Loan Portfolio [Member]
Schedule providing information on performing and nonperforming TDRs
Performing and nonperforming modified TDRs, Number of loans	100	114	179
Performing and nonperforming modified TDRs, Pre-modification recorded investment	25,928	30,878	36,542
Performing and nonperforming modified TDRs, Post-modification recorded investment	25,928	30,878	36,542
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	119	85	121
Performing and nonperforming modified TDRs, Pre-modification recorded investment	4,184	4,943	9,944
Performing and nonperforming modified TDRs, Post-modification recorded investment	$ 4,158	$ 4,840	$ 9,684