QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2012

QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of Quarterly Financial Data (Unaudited)

2012	First		Second		Third		Fourth
Operating revenue	$	116,749	$	143,552	$	178,135	$	121,530
Net operating income		6,607		19,622		36,361		11,253
Net income		1,085		12,965		29,772		5,006
Diluted earnings per share		0.03		0.31		0.71		0.12
Common stock market price range:
High		19.25		18.60		19.05		18.90
Low		17.67		17.14		17.93		16.84
Dividends paid per common share		0.1575		0.1575		0.1575		0.1575

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