Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total USD ($)		Common Shares Outstanding	Accumulated Other Comprehensive (Loss) Income USD ($)	Common Stock USD ($)	Additional Paid-in Capital USD ($)	Retained Earnings USD ($)	Treasury Stock USD ($)
Beginning balance at Dec. 31, 2009	$ 267,807			$ (524)	$ 91,332	$ 60,126	$ 150,507	$ (33,634)
Beginning balance, shares at Dec. 31, 2009			16,465,083
Comprehensive income:
Net income	6,700						6,700
Other comprehensive income, net of income tax:
Unrealized gain on investment securities available-for-sale	1,471			1,471
Unrealized loss on swap	(1,047)			(1,047)
Unrecognized pension benefits	149			149
Total comprehensive income	7,273
Cash dividends declared ($0.40 per share)	(6,631)						(6,631)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	1,030						(321)	1,351
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares			57,970
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 Jun. 30, 2010	269,524			49	91,332	58,980	149,859	(30,696)
Ending balance, shares at Jun. 30, 2010			16,590,710
Beginning balance at Dec. 31, 2010	266,224	[1]		(6,766)	91,332	59,080	151,978	(29,400)
Beginning balance, shares at Dec. 31, 2010	16,648,303		16,648,303
Comprehensive income:
Net income	8,378						8,378
Other comprehensive income, net of income tax:
Unrealized gain on investment securities available-for-sale	3,744			3,744
Unrealized loss on swap	(242)			(242)
Unrecognized pension benefits	165			165
Total comprehensive income	12,045
Cash dividends declared ($0.40 per share)	(6,688)						(6,688)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	1,290					62	13	1,215
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares			73,345
Purchases of treasury stock, shares			(3,005)
Purchases of treasury stock	(52)							(52)
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 Jun. 30, 2011	$ 273,022			$ (3,099)	$ 91,332	$ 58,326	$ 153,728	$ (27,265)
Ending balance, shares at Jun. 30, 2011	16,777,379		16,777,379

[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.