Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of current and past due loans
30-59 days past due	$ 7,590	$ 19,731
60-89 days past due	8,226	14,837
90 days and over past due	14,356	80,760
Total past due	30,172	115,328
Current	736,397	853,783
Total loans	766,569	969,111
Commercial and industrial [Member]
Summary of current and past due loans
30-59 days past due	1,631	9,774
60-89 days past due	1,716	8,574
90 days and over past due	5,963	16,867
Total past due	9,310	35,215
Current	167,767	171,437
Total loans	177,077	206,652
Commercial real estate [Member]
Summary of current and past due loans
30-59 days past due	1,950	4,981
60-89 days past due	588	4,843
90 days and over past due	5,893	45,344
Total past due	8,431	55,168
Current	332,150	373,478
Total loans	340,581	428,646
Real estate construction loans [Member]
Summary of current and past due loans
30-59 days past due	1,866	1,282
60-89 days past due	4,250
90 days and over past due	1,334	6,978
Total past due	7,450	8,260
Current	16,331	41,444
Total loans	23,781	49,704
Residential mortgages (1st and 2nd liens) [Member]
Summary of current and past due loans
30-59 days past due	1,061	3,479
60-89 days past due	1,481	1,144
90 days and over past due	1,031	7,028
Total past due	3,573	11,651
Current	135,361	148,968
Total loans	138,934	160,619
Home equity loans [Member]
Summary of current and past due loans
30-59 days past due	964
60-89 days past due	175	198
90 days and over past due		3,897
Total past due	1,139	4,095
Current	69,137	75,589
Total loans	70,276	79,684
Consumer and other loans [Member]
Summary of current and past due loans
30-59 days past due	118	215
60-89 days past due	16	78
90 days and over past due	135	646
Total past due	269	939
Current	15,651	42,867
Total loans	$ 15,920	$ 43,806