Loans and Leases, Troubled Debt Restructuring (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 Loan	Mar. 31, 2012
Financing Receivable, Modifications [Line Items]
Number of TDRs on non-accrual status	7
Number of TDRs already classified as impaired	7
Pay downs and payoffs received	$ 2,500,000
TDR, charge off recorded	1,100,000
Number of loans	12
Total TDRs	17,565,000	21,100,000
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	1
Rate	0
Term	0
Payment	0
Combination of types	85,000
Total	85,000
Pre-Modification Outstanding Recorded Investment	87,000
Post-Modification Outstanding Recorded Investment	87,000
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	6,981,000
Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	10,584,000
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	3
Total TDRs	8,205,000
Commercial real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	605,000
Commercial real estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	7,600,000
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	4
Total TDRs	1,952,000
Construction and land development [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,423,000
Construction and land development [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	529,000
Commercial & industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	3
Total TDRs	7,267,000
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	1
Rate	0
Term	0
Payment	0
Combination of types	85,000
Total	85,000
Pre-Modification Outstanding Recorded Investment	87,000
Post-Modification Outstanding Recorded Investment	87,000
Commercial & industrial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	4,953,000
Commercial & industrial [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,314,000
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2
Total TDRs	141,000
Residential real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	0
Residential real estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 141,000