Loans and Leases, Troubled Debt Restructuring (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013 Loan	Jun. 30, 2013 Loan	Dec. 31, 2012 Loan
Financing Receivable, Modifications [Line Items]
Number of TDRs on non-accrual status	7	7
Number of TDRs already classified as impaired	7	7
Pay downs and payoffs received		$ 3,400,000
TDR, charge off recorded		1,100,000
Number of loans	14	14	12
Total TDRs	20,385,000	20,385,000	21,100,000
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	2	3
Rate	0	0
Term	0	0
Payment	0	0
Combination of types	3,741,000	3,824,000
Total	3,741,000	3,824,000
Pre-Modification Outstanding Recorded Investment	3,761,000	3,848,000
Post-Modification Outstanding Recorded Investment	3,761,000	3,848,000
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	10,202,000	10,202,000
Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	10,183,000	10,183,000
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	5	5
Total TDRs	11,821,000	11,821,000
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	2	2
Rate	0	0
Term	0	0
Payment	0	0
Combination of types	3,741,000	3,741,000
Total	3,741,000	3,741,000
Pre-Modification Outstanding Recorded Investment	3,761,000	3,761,000
Post-Modification Outstanding Recorded Investment	3,761,000	3,761,000
Commercial real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	4,338,000	4,338,000
Commercial real estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	7,483,000	7,483,000
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	4	4
Total TDRs	1,840,000	1,840,000
Construction and land development [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,328,000	1,328,000
Construction and land development [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	512,000	512,000
Commercial & industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	3	3
Total TDRs	6,590,000	6,590,000
Financing Receivable New Modifications for the Period [Abstract]
Number of loans		1
Rate	0	0
Term	0	0
Payment	0	0
Combination of types		83,000
Total		83,000
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	4,536,000	4,536,000
Commercial & industrial [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,054,000	2,054,000
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2	2
Total TDRs	134,000	134,000
Residential real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	0	0
Residential real estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 134,000	$ 134,000