CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Common Stock	Retained Earnings	Total
Beginning balance, shares at Dec. 31, 2009	13,519,000
Beginning balance at Dec. 31, 2009	$ 109,366	$ 30,265	$ 139,631
Net Income		14,330	14,330
Dividend Reinvestment & Common Stock Purchase Plan	1,917		1,917
Dividend Reinvestment & Common Stock Purchase Plan, shares	116,000
Restricted Stock Award, Net - Employees	299		299
Restricted Stock Award, Net - Employees, shares	14,000
Stock Award - Board Of Directors	24		24
Stock Award - Board Of Directors, shares	2,000
Issuance of Common Stock	27,928		27,928
Issuance of Common Stock, shares	1,915,000
Cash Dividends on Common Stock		(10,510)	(10,510)
Cash Dividends on Preferred Stock		(207)	(207)
Common Stock Expenses		(133)	(133)
Ending Balance, shares at Dec. 31, 2010	15,566,000
Ending Balance at Dec. 31, 2010	139,534	33,745	173,279
Net Income		13,447	13,447
Dividend Reinvestment & Common Stock Purchase Plan	1,504		1,504
Dividend Reinvestment & Common Stock Purchase Plan, shares	82,000
Restricted Stock Award, Net - Employees	323		323
Restricted Stock Award, Net - Employees, shares	30,000
Stock Award - Board Of Directors	71		71
Stock Award - Board Of Directors, shares	4,000
Cash Dividends on Common Stock		(11,437)	(11,437)
Cash Dividends on Preferred Stock		(206)	(206)
Ending Balance, shares at Dec. 31, 2011	15,682,000
Ending Balance at Dec. 31, 2011	141,432	35,549	176,981
Net Income		14,396	14,396
Dividend Reinvestment & Common Stock Purchase Plan	1,587		1,587
Dividend Reinvestment & Common Stock Purchase Plan, shares	86,000
Restricted Stock Award, Net - Employees	448		448
Restricted Stock Award, Net - Employees, shares	21,000
Stock Award - Board Of Directors	105		105
Stock Award - Board Of Directors, shares	6,000
Cash Dividends on Common Stock		(11,679)	(11,679)
Cash Dividends on Preferred Stock		(206)	(206)
Ending Balance, shares at Dec. 31, 2012	15,795,000
Ending Balance at Dec. 31, 2012	$ 143,572	$ 38,060	$ 181,632