Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Troubled Debt Restructurings, Subsequent Defaults) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 loans
Troubled debt restructurings
Troubled debt restructurings, subsequent default, number of contracts	1
Troubled debt restructurings, subsequent defaults, recorded investment	$ 110
Construction and land development
Troubled debt restructurings
Troubled debt restructurings, subsequent default, number of contracts	1
Troubled debt restructurings, subsequent defaults, recorded investment	$ 110