Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total		Common Stock	Accumulated Other Comprehensive (Loss) Income	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Beginning balance at Dec. 31, 2009	$ 267,807		$ 91,332	$ (524)	$ 60,126	$ 150,507	$ (33,634)
Beginning balance, shares at Dec. 31, 2009			16,465,083
Comprehensive income:
Net income	10,847					10,847
Other comprehensive income, net of income tax:
Unrealized gain on investment securities available for sale	1,697			1,697
Unrealized loss on swap	(1,554)			(1,554)
Unrecognized pension benefits	214			214
Total comprehensive income	11,204
Cash dividends declared ($0.60 per share)	(9,955)					(9,955)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	1,672					(497)	2,169
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares			94,160
Purchases of treasury stock, shares			325
Purchases of treasury stock	(6)						(6)
Restricted stock awards granted, shares			67,982
Restricted stock awards granted					(1,197)	(396)	1,593
Vesting of restricted stock awards	51				51
Ending balance at Sep. 30, 2010	270,773		91,332	(167)	58,980	150,506	(29,878)
Ending balance, shares at Sep. 30, 2010			16,626,900
Beginning balance at Dec. 31, 2010	266,224	[1]	91,332	(6,766)	59,080	151,978	(29,400)
Beginning balance, shares at Dec. 31, 2010	16,648,303		16,648,303
Comprehensive income:
Net income	13,622					13,622
Other comprehensive income, net of income tax:
Unrealized gain on investment securities available for sale	5,470			5,470
Unrealized loss on swap	(1,195)			(1,195)
Unrecognized pension benefits	240			240
Total comprehensive income	18,137
Cash dividends declared ($0.60 per share)	(10,043)					(10,043)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	1,787				62	13	1,712
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares			105,345
Purchases of treasury stock, shares			85,285
Purchases of treasury stock	(1,209)						(1,209)
Restricted stock awards granted, shares			58,736
Restricted stock awards granted					(1,019)	47	972
Vesting of restricted stock awards	203				203
Ending balance at Sep. 30, 2011	$ 275,099		$ 91,332	$ (2,251)	$ 58,236	$ 155,617	$ (27,925)
Ending balance, shares at Sep. 30, 2011	16,727,099		16,727,099

[1] The consolidated balance sheet at December 31, 2010 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U. S. generally accepted accounting principles for complete financial statements. Certain amounts have been reclassified to conform to the current-year presentation. See accompanying notes to the unaudited consolidated financial statements.