Allowance for Loan Losses, Loans and Allowance for Loan Losses by Risk Rating (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	$ 16,435		$ 80,760
Percentage of Total	100.00%		100.00%
Total Loans	780,780		969,654
Percentage of Total Loans	2.10%		8.30%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	16,435		80,760
Non-accrual loans collateral value	26,726		96,353
Commercial and Industrial [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	6,529	[1]	16,867	[1]
Percentage of Total	39.80%		20.90%
Total Loans	168,709		206,652
Percentage of Total Loans	0.80%		1.70%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	6,529	[1]	16,867	[1]
Non-accrual loans collateral value	4,400	[1]	0	[1]
Commercial Real Estate [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	5,192		45,344
Percentage of Total	31.60%		56.20%
Total Loans	369,271		428,646
Percentage of Total Loans	0.70%		4.70%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	5,192		45,344
Non-accrual loans collateral value	12,675		68,067
Real Estate Construction [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	1,961		6,978
Percentage of Total	11.90%		8.60%
Total Loans	15,469		49,704
Percentage of Total Loans	0.30%		0.70%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	1,961		6,978
Non-accrual loans collateral value	3,661		6,715
Residential Mortgages (1st and 2nd Liens) [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	2,466		7,028
Percentage of Total	15.00%		8.70%
Total Loans	146,575		160,619
Percentage of Total Loans	0.30%		0.70%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	2,466		7,028
Non-accrual loans collateral value	5,141		14,133
Home Equity [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	266		3,897
Percentage of Total	1.60%		4.80%
Total Loans	66,468		79,684
Percentage of Total Loans	0.00%		0.40%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	266		3,897
Non-accrual loans collateral value	849		7,438
Consumer and Other Loans [Member]
Summarizes non-accrual loans by loan class
Non-accrual Loans principal balance	21		646
Percentage of Total	0.10%		0.80%
Total Loans	14,288		44,349
Percentage of Total Loans	0.00%		0.10%
Collateral value securing non-accrual loans [Abstract]
Non-accrual Loans principal balance	21		646
Non-accrual loans collateral value	$ 0		$ 0

[1] Repayment of commercial and industrial loans is expected primarily from the cash flow of the business. The collateral typically securing these loans is a lien on all corporate assets via a blanket UCC filing and does not usually include real estate. For purposes of this disclosure, the Company has ascribed no value to the non-real estate collateral for this class of loans.