QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2011

QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of Quarterly Financial Data (Unaudited)

2011	First		Second		Third		Fourth
Operating revenue	$	98,149	$	131,397	$	169,254	$	103,014
Net operating income		9,948		19,555		30,078		7,586
Net income		2,719		12,190		20,935		1,868
Diluted earnings per share		0.07		0.29		0.50		0.04
Common stock market price range:
High		19.18		19.16		19.37		19.20
Low		17.28		18.06		16.65		16.81
Dividends paid per common share		0.15375		0.15375		0.15375		0.15375

2010	First		Second		Third		Fourth
Operating revenue	$	90,272	$	118,321	$	146,349	$	105,457
Net operating income		7,758		16,284		25,865		11,906
Net income		2,018		10,381		20,386		4,871
Diluted earnings per share		0.05		0.25		0.49		0.11
Common stock market price range:
High		19.05		19.85		18.87		19.25
Low		17.63		16.91		16.93		18.01
Dividends paid per common share		0.14875		0.14875		0.14875		0.14875