Segment and Related Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Segment	Jun. 30, 2012	Dec. 31, 2012
Segment and Related Information [Abstract]
Number of reportable segments			2
Segment Reporting Information [Line Items]
Interest income	$ 13,347	$ 14,886	$ 26,756	$ 30,228
Interest expense	1,654	2,070	3,381	4,240
Noninterest income	2,686	2,800	5,456	6,034
Operating income (loss) before income taxes	5,951	6,050	11,791	11,796
Net income (loss)	4,210	4,274	8,361	8,449
Depreciation and amortization	851	989	1,695	1,958
Total assets	1,294,017	1,290,892	1,294,017	1,290,892	1,283,687
Capital expenditures	402	0	580	573
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	13,347	14,886	26,756	30,228
Interest expense	1,465	1,865	3,004	3,832
Noninterest income	1,608	1,715	3,686	3,961
Operating income (loss) before income taxes	5,558	5,704	11,329	11,187
Net income (loss)	3,918	4,014	8,009	7,984
Depreciation and amortization	847	984	1,687	1,948
Total assets	1,292,099	1,289,971	1,292,099	1,289,971
Capital expenditures	402	0	580	573
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	1,073	1,079	1,760	2,062
Operating income (loss) before income taxes	682	650	978	1,208
Net income (loss)	483	461	693	865
Depreciation and amortization	4	5	8	10
Total assets	0	0	0	0
Capital expenditures	0	0	0	0
Other [Member]
Segment Reporting Information [Line Items]
Interest income	0	2	0	5
Interest expense	189	207	377	413
Noninterest income	5	6	10	11
Operating income (loss) before income taxes	(289)	(304)	(516)	(599)
Net income (loss)	(191)	(201)	(341)	(400)
Depreciation and amortization	0	0	0	0
Total assets	1,918	921	1,918	921
Capital expenditures	0	0	0	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	0	(2)	0	(5)
Interest expense	0	(2)	0	(5)
Noninterest income	0	0	0	0
Operating income (loss) before income taxes	0	0	0	0
Net income (loss)	0	0
Depreciation and amortization	0	0	0	0
Total assets	0	0	0	0
Capital expenditures	$ 0	$ 0	$ 0	$ 0