Earnings Per Common Share Attributable To Avista Corporation

12 Months Ended

Dec. 31, 2011

Earnings Per Common Share Attributable To Avista Corporation [Abstract]

Earnings Per Common Share Attributable To Avista Corporation

NOTE 19. EARNINGS PER COMMON SHARE ATTRIBUTABLE TO AVISTA CORPORATION

The following table presents the computation of basic and diluted earnings per common share attributable to Avista Corporation for the years ended December 31 (in thousands, except per share amounts):

	2011			2010			2009
Numerator:
Net income attributable to Avista Corporation	$	100,224		$	92,425		$	87,071
Subsidiary earnings adjustment for dilutive securities		(473	)		(226	)		(114	)
Adjusted net income attributable to Avista Corporation for computation of diluted earnings per common share	$	99,751		$	92,199		$	86,957
Denominator:
Weighted-average number of common shares outstanding-basic		57,872			55,595			54,694
Effect of dilutive securities:
Performance and restricted stock awards		172			157			163
Stock options		48			72			85
Weighted-average number of common shares outstanding-diluted		58,092			55,824			54,942
Potential shares excluded in calculation (1)		—			—			218
Earnings per common share attributable to Avista Corporation:
Basic	$	1.73		$	1.66		$	1.59
Diluted	$	1.72		$	1.65		$	1.58

(1) Certain stock options were excluded from the calculation because they were antidilutive based on the fact that the exercise price of the stock options was higher than the average market price of Avista Corp. common stock during the respective period.