Allowance for Loan Losses, Loans Current and Past Due by Aging Categories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of current and past due loans
30-59 days past due	$ 12,435	$ 19,731
60-89 days past due	1,727	14,837
90 days and over past due	16,435	80,760
Total past due	30,597	115,328
Current	750,183	854,326
Total loans	780,780	969,654
Commercial and Industrial [Member]
Summary of current and past due loans
30-59 days past due	6,591	9,774
60-89 days past due	1,274	8,574
90 days and over past due	6,529	16,867
Total past due	14,394	35,215
Current	154,315	171,437
Total loans	168,709	206,652
Commercial Real Estate [Member]
Summary of current and past due loans
30-59 days past due	1,145	4,981
60-89 days past due	329	4,843
90 days and over past due	5,192	45,344
Total past due	6,666	55,168
Current	362,605	373,478
Total loans	369,271	428,646
Real Estate Construction [Member]
Summary of current and past due loans
30-59 days past due	1,382	1,282
60-89 days past due	0	0
90 days and over past due	1,961	6,978
Total past due	3,343	8,260
Current	12,126	41,444
Total loans	15,469	49,704
Residential Mortgages (1st and 2nd Liens) [Member]
Summary of current and past due loans
30-59 days past due	2,867	3,479
60-89 days past due	6	1,144
90 days and over past due	2,466	7,028
Total past due	5,339	11,651
Current	141,236	148,968
Total loans	146,575	160,619
Home Equity [Member]
Summary of current and past due loans
30-59 days past due	261	0
60-89 days past due	100	198
90 days and over past due	266	3,897
Total past due	627	4,095
Current	65,841	75,589
Total loans	66,468	79,684
Consumer and Other Loans [Member]
Summary of current and past due loans
30-59 days past due	189	215
60-89 days past due	18	78
90 days and over past due	21	646
Total past due	228	939
Current	14,060	43,410
Total loans	$ 14,288	$ 44,349