Loans and Allowance for Loan Losses (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Number
Commercial Real Estate Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	6
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 8,354
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,354
Consumer Real Estate Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	270
Financing Receivable, Modifications, Post-Modification Recorded Investment	270
Construction and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	459
Financing Receivable, Modifications, Post-Modification Recorded Investment	459
Commercial and Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	5
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,432
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,432