Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Interest and dividend income:
Interest and fees on loans	$ 34,854		$ 34,867	$ 34,797
Interest on securities	16,006		16,274	19,570
Dividends on FHLB stock	47
Total interest and dividend income	50,907		51,141	54,367
Interest expense:
Deposits	8,765		9,906	10,724
Short-term borrowings	260		284	602
Long-term debt	7,493		9,242	9,760
Total interest expense	16,518		19,432	21,086
Net interest income	34,389		31,709	33,281
Provision for loan losses	2,395		2,327	3,207
Net interest income after provision for loan losses	31,994		29,382	30,074
Non-interest income:
Trust and other financial services	3,061		2,984	2,444
Service charges on deposit accounts	1,284		1,359	1,412
Mortgage banking activities	80		115	490
Credit and debit card service charges and fees	1,277		1,160	1,004
Net securities gains (losses)	2,689		2,127	1,521
Total other-than-temporary impairment ("OTTI") losses	(2,796)		(898)	(2,773)
Non-credit portion of OTTI losses (before taxes)	577	[1]		1,319	[1]
Net OTTI losses recognized in earnings	(2,219)		(898)	(1,454)
Other operating income	620		611	605
Total non-interest income	6,792		7,458	6,022
Non-interest expense:
Salaries and employee benefits	12,814		12,193	11,594
Occupancy expense	1,514		1,357	1,329
Furniture and equipment expense	1,660		1,602	1,378
Credit and debit card expenses	310		295	332
FDIC insurance assessments	1,099		1,066	1,420
Other operating expense	5,884		5,533	5,701
Total non-interest expense	23,281		22,046	21,754
Income before income taxes	15,505		14,794	14,342
Income taxes	4,462		4,132	3,992
Net income	11,043		10,662	10,350
Preferred stock dividends and accretion of discount			653	1,034
Net income available to common shareholders	$ 11,043		$ 10,009	$ 9,316
Computation of Earnings Per Share:
Basic	3,860,474		3,782,881	2,916,643
Effect of dilutive employee stock options	18,140		45,821	57,182
Effect of dilutive warrants				9,604
Diluted	3,878,614		3,828,702	2,983,429
Per Common Share Data:
Basic Earnings Per Share	$ 2.86		$ 2.65	$ 3.19
Diluted Earnings Per Share	$ 2.85		$ 2.61	$ 3.12

[1] (1) Included in other comprehensive income (loss), net of taxes