Allowance for Loan Losses (Details 3) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Information regarding loans modified under TDR
Number of Contracts	$ 2	$ 19
Pre-modification outstanding recorded investment	2,609,000	16,197,000
Post-modification outstanding recorded investment	2,609,000	15,879,000
Commercial and industrial [Member]
Information regarding loans modified under TDR
Number of Contracts
Pre-modification outstanding recorded investment
Post-modification outstanding recorded investment
Consumer and other loans [Member]
Information regarding loans modified under TDR
Number of Contracts
Pre-modification outstanding recorded investment
Post-modification outstanding recorded investment
Construction [Member] \| Real estate loans [Member]
Information regarding loans modified under TDR
Number of Contracts		1
Pre-modification outstanding recorded investment		701,000
Post-modification outstanding recorded investment		357,000
Other real estate loans [Member] \| Real estate loans [Member]
Information regarding loans modified under TDR
Number of Contracts	1	14
Pre-modification outstanding recorded investment	2,426,000	12,829,000
Post-modification outstanding recorded investment	2,426,000	12,855,000
Secured by 1-4 family residential [Member] \| Real estate loans [Member]
Information regarding loans modified under TDR
Number of Contracts	1	4
Pre-modification outstanding recorded investment	183,000	2,667,000
Post-modification outstanding recorded investment	$ 183,000	$ 2,667,000

Allowance for Loan Losses (Details 3) (USD $)

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

$ 2

$ 19

2,609,000

16,197,000