Loans and Leases, Troubled Debt Restructuring (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Number of loans	10	12
Total TDRs	$ 12,266,000	$ 14,200,000
Number of troubled debt restructurings, non-accrual	10	12
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	4,521,000
Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	6
Total TDRs	7,745,000
Number of troubled debt restructurings, non-accrual	6
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	4
Total TDRs	4,541,000
Number of troubled debt restructurings, non-accrual	4
Construction and land development [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	3,894,000
Construction and land development [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	647,000
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2
Total TDRs	3,222,000
Number of financing receivable, payment default	1
Carrying amount of the troubled debt restructurings in default	2,600,000
Number of troubled debt restructurings, non-accrual	2
Commercial real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	627,000
Commercial real estate [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,595,000
Commercial & industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1
Total TDRs	2,666,000
Number of troubled debt restructurings, non-accrual	1
Commercial & industrial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	0
Commercial & industrial [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,666,000
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2
Total TDRs	164,000
Number of troubled debt restructurings, non-accrual	2
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	164,000
Multi-family [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1
Total TDRs	1,673,000
Number of troubled debt restructurings, non-accrual	1
Multi-family [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	0
Multi-family [Member] | Non-Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 1,673,000