Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Presentation of Credit Quality Indicators
Total loans	$ 1,552,482	$ 1,551,032	$ 1,396,062
Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	1,368,255	1,335,385
PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	107,995	134,293
PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	76,232	81,354
Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	1,204,808	1,146,239
Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	98,321	123,472
Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	45,659	56,918
Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	5,108	10,245
Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	117,788	132,228
Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	4,566	576
Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
RE Mortgage [Member] | Residential [Member]
Presentation of Credit Quality Indicators
Total loans	134,015	139,586	127,083
RE Mortgage [Member] | Residential [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	119,505	118,320
RE Mortgage [Member] | Residential [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	8,444	14,750
RE Mortgage [Member] | Residential [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	6,066	6,516
RE Mortgage [Member] | Residential [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	104,504	103,611
RE Mortgage [Member] | Residential [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	8,047	14,576
RE Mortgage [Member] | Residential [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	1,951	1,020
RE Mortgage [Member] | Residential [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
RE Mortgage [Member] | Residential [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	13,050	13,689
RE Mortgage [Member] | Residential [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	397	174
RE Mortgage [Member] | Residential [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
RE Mortgage [Member] | Residential [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
RE Mortgage [Member] | Commercial [Member]
Presentation of Credit Quality Indicators
Total loans	850,132	826,336	701,674
RE Mortgage [Member] | Commercial [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	740,782	699,682
RE Mortgage [Member] | Commercial [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	76,938	93,428
RE Mortgage [Member] | Commercial [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	32,412	33,226
RE Mortgage [Member] | Commercial [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	640,678	574,167
RE Mortgage [Member] | Commercial [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	69,024	83,735
RE Mortgage [Member] | Commercial [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	28,990	46,518
RE Mortgage [Member] | Commercial [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	4,204	9,693
RE Mortgage [Member] | Commercial [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	71,114	78,997
RE Mortgage [Member] | Commercial [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	3,710
RE Mortgage [Member] | Commercial [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
RE Mortgage [Member] | Commercial [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Lines [Member]
Presentation of Credit Quality Indicators
Total loans	346,917	357,305	332,532
Home Equity Lines [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	314,973	321,834
Home Equity Lines [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	17,995	20,902
Home Equity Lines [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	13,949	14,569
Home Equity Lines [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	295,238	305,290
Home Equity Lines [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	16,798	20,053
Home Equity Lines [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	7,341	1,295
Home Equity Lines [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	846	548
Home Equity Lines [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	12,394	15,249
Home Equity Lines [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	351	301
Home Equity Lines [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Lines [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Loans [Member]
Presentation of Credit Quality Indicators
Total loans	14,274	14,844	14,905
Home Equity Loans [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	13,526	14,320
Home Equity Loans [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	543	367
Home Equity Loans [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	205	157
Home Equity Loans [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	12,346	13,478
Home Equity Loans [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	543	367
Home Equity Loans [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	653
Home Equity Loans [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Loans [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	527	842
Home Equity Loans [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Loans [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Home Equity Loans [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member]
Presentation of Credit Quality Indicators
Total loans	6,496	10,821	16,767
Auto Indirect [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	6,496	10,821
Auto Indirect [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	5,296	9,686
Auto Indirect [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	671	33
Auto Indirect [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	529	1,102
Auto Indirect [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Auto Indirect [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Other Consumer [Member]
Presentation of Credit Quality Indicators
Total loans	25,561	23,360	18,660
Other Consumer [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	22,670	20,270
Other Consumer [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	2,852	3,041
Other Consumer [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	39	49
Other Consumer [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	21,891	19,871
Other Consumer [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	2,686	3,034
Other Consumer [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	645	10
Other Consumer [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	58	4
Other Consumer [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	134	389
Other Consumer [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	108	3
Other Consumer [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Other Consumer [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
C&I [Member]
Presentation of Credit Quality Indicators
Total loans	139,733	139,131	140,531
C&I [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	127,123	123,486
C&I [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	1,223	1,805
C&I [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	11,387	13,840
C&I [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	113,819	107,877
C&I [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	1,223	1,707
C&I [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	4,824	6,709
C&I [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
C&I [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	8,480	8,900
C&I [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans		98
C&I [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
C&I [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member]
Presentation of Credit Quality Indicators
Total loans	19,259	22,122	22,479
Construction [Member] | Residential [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	10,793	13,908
Construction [Member] | Residential [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	8,466	8,214
Construction [Member] | Residential [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	5,969	6,872
Construction [Member] | Residential [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	41	903
Construction [Member] | Residential [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	4,783	6,133
Construction [Member] | Residential [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Residential [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member]
Presentation of Credit Quality Indicators
Total loans	16,095	17,527	21,431
Construction [Member] | Commercial [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	12,387	12,744
Construction [Member] | Commercial [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member] | PCI loans [Member]
Presentation of Credit Quality Indicators
Total loans	3,708	4,783
Construction [Member] | Commercial [Member] | Pass [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	5,067	5,387
Construction [Member] | Commercial [Member] | Pass [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member] | Special mention [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	543	430
Construction [Member] | Commercial [Member] | Special mention [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member] | Substandard [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans	6,777	6,927
Construction [Member] | Commercial [Member] | Substandard [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member] | Loss [Member] | Originated loans [Member]
Presentation of Credit Quality Indicators
Total loans
Construction [Member] | Commercial [Member] | Loss [Member] | PNCI loans [Member]
Presentation of Credit Quality Indicators
Total loans