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Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2011

Selected Quarterly Financial Data (Unaudited)

Selected Quarterly Financial Data (Unaudited)

13. Selected Quarterly Financial Data (Unaudited)

Consolidated quarterly financial information for 2011 and 2010 is as follows (dollars in thousands, except per share amounts):

	2011 Quarter Ended									2011
	March 31,(a)			June 30,		Sept. 30,		Dec. 31,		Total

Operating revenues	$	648,847		$	799,799	$	1,124,841	$	667,892	$	3,241,379
Operations and maintenance	255,029			210,590		210,035		228,632		904,286
Operating income	35,784			196,992		435,017		78,715		746,508
Income taxes	(6,005		)	50,818		131,416		7,375		183,604
Income (loss) from continuing operations	(10,368		)	93,185		253,273		19,544		355,634
Net income (loss) attributable to common shareholders	(15,135		)	86,685		255,359		12,564		339,473

Earnings Per Share:
Income (loss) from continuing operations attributable to common shareholders - Basic	$	(0.15	)	$	0.79	$	2.25	$	0.11	$	3.01
Net income (loss) attributable to common shareholders - Basic	(0.14		)	0.80		2.34		0.12		3.11
Income (loss) from continuing operations attributable to common shareholders - Diluted	(0.15		)	0.78		2.24		0.11		2.99
Net income (loss) attributable to common shareholders - Diluted	(0.14		)	0.79		2.32		0.11		3.09

(a) The March 31, 2011 results were adjusted for the effect of reclassifications for discontinued operations (see Note 21). The adjustments resulted in a reduction in operating revenues of $10,728, a reduction in operations and maintenance of $1,457, a reduction in operating income of $1,357, a decrease in income taxes of $356, and a decrease in income from continuing operations of $1,043.

	2010 Quarter Ended												2010
	March 31,			June 30,			Sept. 30,			Dec. 31,			Total

As originally reported in the 2010 10-K:
Operating revenues	$	620,355		$	820,594		$	1,139,085		$	683,611		$	3,263,645
Operations and maintenance	207,842			215,104			221,469			232,991			877,406
Operating income	57,668			203,273			403,625			59,318			723,884
Income taxes	(7,172		)	51,829			123,486			(3,822		)	164,321
Income from continuing operations	11,983			94,584			231,828			12,203			350,598
Net income (loss) attributable to common shareholders	(6,014		)	114,797			233,920			7,350			350,053

Reclassification of discontinued operations (Note 21):
Operating revenues	$	(8,093	)	$	(17,799	)	$	(22,375	)	$	(26,179	)	$	(74,446	)
Operations and maintenance	(1,529		)	(1,495		)	(1,811		)	(2,386		)	(7,221		)
Operating income	(694		)	(1,889		)	(3,351		)	(3,067		)	(9,001		)
Income taxes	(481		)	(641		)	(1,139		)	(1,191		)	(3,452		)
Income (loss) from continuing operations	(292		)	(1,270		)	(2,266		)	(1,919		)	(5,747		)

After reclassifications:
Operating revenues	$	612,262		$	802,795		$	1,116,710		$	657,432		$	3,189,199
Operations and maintenance	206,313			213,609			219,658			230,605			870,185
Operating income	56,974			201,384			400,274			56,251			714,883
Income taxes	(7,653		)	51,188			122,347			(5,013		)	160,869
Income from continuing operations	11,691			93,314			229,562			10,284			344,851
Net income (loss) attributable to common shareholders	(6,014		)	114,797			233,920			7,350			350,053

Earnings Per Share:
As originally reported in the 2010 10-K
Income from continuing operations attributable to common shareholders - Basic	$	0.07		$	0.84		$	2.09		$	0.07		$	3.10
Net income (loss) attributable to common shareholders - Basic	(0.06		)	1.07			2.15			0.07			3.28
Income from continuing operations attributable to common shareholders - Diluted	0.07			0.83			2.08			0.06			3.08
Net income (loss) attributable to common shareholders - Diluted	(0.06		)	1.07			2.14			0.07			3.27

Earnings Per Share:
After reclassifications:
Income from continuing operations attributable to common shareholders - Basic	$	0.06		$	0.82		$	2.07		$	0.05		$	3.05
Net income (loss) attributable to common shareholders - Basic	(0.06		)	1.07			2.15			0.07			3.28
Income from continuing operations attributable to common shareholders - Diluted	0.06			0.82			2.06			0.05			3.03
Net income (loss) attributable to common shareholders - Diluted	(0.06		)	1.07			2.14			0.07			3.27

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

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