Loans (Nonaccrual Loans) (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 15,742,000	$ 21,237,000
Accruing loans 90 days or more past due	0	0
Current loans on nonaccrual status	3,000,000	3,600,000
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,597,000	5,709,000
Commercial Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	0	0
Commercial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	3,405,000	3,708,000
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	8,659,000	10,614,000
Homeowner Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	0	0
Home Equity Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	695,000	718,000
Home Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	371,000	335,000
Other Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 15,000	$ 153,000