CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN COMMON STOCK EQUITY (unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Treasury Stock [Member]	Other Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2009	$ 231,423	$ 83,016	$ (48,436)	$ 72,179	$ (209)	$ 124,873
Balance (In shares) at Dec. 31, 2009		13,835,968	(2,129,073)
Net income	5,647					5,647
Common Stock Issuance, net of issuance costs	11,536	3,497		8,039
Common Stock Issuance, net of issuance costs (in shares)	582,831
Dividend reinvestment plan	715	214		501
Dividend reinvestment plan (in shares)		35,632
Stock options exercised	511	210		301
Stock options exercised (in shares)		35,100
Common & nonvested shares	55	15		40
Common & nonvested shares (in shares)		2,484
Performance share plans	(107)	91		(198)
Performance share plans (shares)	15,121
Common - $0.69 per share	(8,266)					(8,266)
Cumulative non-redeemable preferred stock	(184)					(184)
Amortization of preferred stock issuance expense	8			8
Gain (Loss) on capital stock	0			2		(2)
Balance at Jun. 30, 2010	241,338	87,043	(48,436)	80,872	(209)	122,068
Balance (In shares) at Jun. 30, 2010		14,507,136	(2,129,073)
Balance at Dec. 31, 2010	272,728	92,821	(48,436)	94,462	(232)	134,113
Balance (In shares) at Dec. 31, 2010	13,341,144	15,470,217	(2,129,073)
Net income	9,161					9,161
Other comprehensive income	133				133
Dividend reinvestment plan	702	182		520
Dividend reinvestment plan (in shares)		30,276
Stock options exercised	422	157		265
Stock options exercised (in shares)	26,200
Common & nonvested shares	142	43		99
Common & nonvested shares (in shares)		7,075
Performance share plans	25	104		(79)
Performance share plans (shares)	17,400
Common - $0.69 per share	(9,237)					(9,237)
Cumulative non-redeemable preferred stock	(184)					(184)
Amortization of preferred stock issuance expense	7			7
Balance at Jun. 30, 2011	$ 273,899	$ 93,307	$ (48,436)	$ 95,274	$ (99)	$ 133,853
Balance (In shares) at Jun. 30, 2011	13,422,095	15,551,168	(2,129,073)