Credit Quality of Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Loan	Jun. 30, 2012 Loan
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts	2	3
Pre-modification outstanding recorded investment	$ 521	$ 2,464
Post-Modification outstanding recorded investment	521	2,464
Below Market Interest Rate [Member]
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts		1
Pre-modification outstanding recorded investment		1,943
Post-Modification outstanding recorded investment		1,943
Below Market Interest Rate [Member] | Real Estate Secured by Residential Properties [Member]
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts		1
Pre-modification outstanding recorded investment		1,943
Post-Modification outstanding recorded investment		1,943
Extended Payment Terms [Member]
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts	2	2
Pre-modification outstanding recorded investment	521	521
Post-Modification outstanding recorded investment	521	521
Extended Payment Terms [Member] | Real Estate Construction and Land Development Loans [Member]
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts	1	1
Pre-modification outstanding recorded investment	503	503
Post-Modification outstanding recorded investment	503	503
Extended Payment Terms [Member] | Commercial and Industrial [Member]
Financing Receivable Breakdown of Types of Concessions Made by Loan Class
Financing Receivable, Modifications, Number of Contracts	1	1
Pre-modification outstanding recorded investment	18	18
Post-Modification outstanding recorded investment	$ 18	$ 18