Loans (Credit Quality Indicators - Commercial) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 1,205,635	$ 1,180,433
Pass [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	690,052	669,220
Pass [Member] | Commercial Construction and Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	34,179	27,842
Pass [Member] | Commercial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	481,404	483,371
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	48,411	46,042
Special Mention [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	20,920	21,649
Special Mention [Member] | Commercial Construction and Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Special Mention [Member] | Commercial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	27,491	24,393
Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	23,101	25,944
Classified [Member] | Commercial Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	18,996	19,944
Classified [Member] | Commercial Construction and Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	0	0
Classified [Member] | Commercial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 4,105	$ 6,000