Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data		Total	Deferred Compensation	Treasury Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2008		$ 123,073	$ 1,549	$ (1,549)	$ 3,323	$ 66,681	$ 56,817	$ (3,748)
Beginning balance, shares at Dec. 31, 2008	[1]				6,827,121
Net Income		15,897					15,897
Total other comprehensive income (loss)		1,224						1,224
Dividend Reinvestment Plan, shares	[1]				31,607
Dividend Reinvestment Plan		936			15	921
Retirement Savings Plan, shares	[1]				32,375
Retirement Savings Plan		982			16	966
Conversion of debentures, shares	[1]				7,927
Conversion of debentures		135			4	131
Share-based compensation, shares	[1],[2],[3]				7,374
Share-based compensation	[2],[3]	1,335			3	1,332
Deferred Compensation Plan	[4]		(810)	810
Purchase of treasury stock, shares	[1]				(2,411)
Purchase of treasury stock		(73)		(73)
Sale and distribution of treasury stock, shares	[1]				2,411
Sale and distribution of treasury stock		73		73
Common stock issued in the merger, shares	[1]				2,487,910
Common stock issued in the merger		75,682			1,211	74,471
Dividends on share-based compensation		(104)					(104)
Cash dividends	[5]	(9,379)					(9,379)
Ending balance at Dec. 31, 2009		209,781	739	(739)	4,572	144,502	63,231	(2,524)
Ending balance, shares at Dec. 31, 2009	[1]				9,394,314
Net Income		26,056					26,056
Total other comprehensive income (loss)		(836)						(836)
Dividend Reinvestment Plan, shares	[1]				53,806
Dividend Reinvestment Plan		1,725			26	1,699
Retirement Savings Plan, shares	[1]				27,795
Retirement Savings Plan		903			14	889
Conversion of debentures, shares	[1]				11,865
Conversion of debentures		202			6	196
Share-based compensation, shares	[1],[2],[3]				36,415
Share-based compensation	[2],[3]	637			17	620
Tax benefit on share-based compensation		253				253
Deferred Compensation Plan	[4]		38	(38)
Purchase of treasury stock, shares	[1]				(1,144)
Purchase of treasury stock		(38)		(38)
Sale and distribution of treasury stock, shares	[1]				1,144
Sale and distribution of treasury stock		38		38
Dividends on share-based compensation		(104)					(104)
Cash dividends	[5]	(12,378)					(12,378)
Ending balance at Dec. 31, 2010		226,239	777	(777)	4,635	148,159	76,805	(3,360)
Ending balance, shares at Dec. 31, 2010	[1]				9,524,195
Net Income		27,622					27,622
Total other comprehensive income (loss)		(1,167)						(1,167)
Dividend Reinvestment Plan		(22)				(22)
Retirement Savings Plan, shares	[1]				2,002
Retirement Savings Plan		80			1	79
Conversion of debentures, shares	[1]				10,680
Conversion of debentures		181			5	176
Share-based compensation, shares	[1],[2],[3]				30,430
Share-based compensation	[2],[3]	1,013			15	998
Tax benefit on share-based compensation		13				13
Deferred Compensation Plan	[4]		40	(40)
Purchase of treasury stock, shares	[1]				(993)
Purchase of treasury stock		(40)		(40)
Sale and distribution of treasury stock, shares	[1]				993
Sale and distribution of treasury stock		40		40
Dividends on share-based compensation		(129)					(129)
Cash dividends	[5]	(13,050)					(13,050)
Ending balance at Dec. 31, 2011		$ 240,780	$ 817	$ (817)	$ 4,656	$ 149,403	$ 91,248	$ (4,527)
Ending balance, shares at Dec. 31, 2011	[1]				9,567,307

[1] Includes 30,597, 29,596 and 28,452, shares at December 31, 2011, 2010 and 2009, respectively, held in a Rabbi Trust established by the Company relating to the Deferred Compensation Plan.

[2] Includes amounts for shares issued for Directors' compensation.

[3] The shares issued under the Performance Incentive Plan ("PIP") are net of shares withheld for employee taxes. For 2011 and 2010, the Company withheld 12,324 and 17,695 shares, respectively, for taxes. The Company did not issue any shares for the PIP in 2009.

[4] In May and November 2009, certain participants of the Deferred Compensation Plan received distributions totaling $883. There were no distributions in 2011 and 2010.

[5] Cash dividends per share for the periods ended December 31, 2011, 2010 and 2009 were $1.365, $1.305, and $1.250, respectively.