SELECTED QUARTERLY INFORMATION (UNAUDITED)

12 Months Ended

Dec. 31, 2015

SELECTED QUARTERLY INFORMATION (UNAUDITED)

SELECTED QUARTERLY INFORMATION (UNAUDITED)

13.   SELECTED QUARTERLY INFORMATION (UNAUDITED)

        The following is a summary of quarterly results for 2015 and 2014 (dollars in thousands except per share amounts):

	Quarters
Quarterly Results for 2015	First		Second		Third		Fourth
Operating revenues(1)	$	164,544	$	134,557	$	169,714	$	136,758
Operating income	$	24,713	$	16,047	$	35,783	$	19,757
Net Income	$	14,637	$	6,770	$	25,285	$	9,905
Basic Earnings Per Share	$	0.34	$	0.16	$	0.58	$	0.23
Diluted Earnings Per Share	$	0.34	$	0.15	$	0.58	$	0.23

(1)Operating revenue for the first, second, third and fourth quarters of 2015 include SPP IM net revenues of $4.7 million, $3.4 million, $4.0 million, and $2.9 million, respectively.

	Quarters
Quarterly Results for 2014	First		Second		Third		Fourth
Operating revenues(1)	$	179,673	$	149,782	$	171,512	$	151,363
Operating income	$	29,488	$	19,502	$	31,709	$	19,300
Net Income	$	20,905	$	11,194	$	23,892	$	11,112
Basic and Diluted Earnings Per Share	$	0.48	$	0.26	$	0.55	$	0.26

(1)Operating revenue for the first, second, third and fourth quarters of 2014 include SPP IM net revenues of $6.2 million, $16.5 million, $11.5 million, and $7.5 million, respectively.

        The sum of the net income and quarterly earnings per share of common stock may not equal the net income and earnings per share of common stock as computed on an annual basis due to rounding.