Loans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate loan threshold for jumbo loan qualification	$ 600,000
Troubled debt restructurings included in impaired loans	56,700,000	47,800,000
Annual loan review, exposure on non-homogeneous commercial loan, minimum	2,000,000
Percent of total loans composed of a single industry, threshold	10.00%
Related party loans, threshold for inclusion in table	60,000
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loan relationships having aggregate balances in excess of	2,000,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loan relationships having aggregate balances in excess of	$ 500,000