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Earnings Per Common Share Attributable To Avista Corporation (Tables)
12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Computations Of Earnings Per Share
 
2013
 
2012
 
2011
Numerator:
 
 
 
 
 
Net income attributable to Avista Corporation shareholders
$
111,077

 
$
78,210

 
$
100,224

Subsidiary earnings adjustment for dilutive securities
(229
)
 
(38
)
 
(473
)
Adjusted net income attributable to Avista Corporation shareholders for computation of diluted earnings per common share
$
110,848

 
$
78,172

 
$
99,751

Denominator:
 
 
 
 
 
Weighted-average number of common shares outstanding-basic
59,960

 
59,028

 
57,872

Effect of dilutive securities:
 
 
 
 
 
Performance and restricted stock awards
37

 
162

 
172

Stock options

 
11

 
48

Weighted-average number of common shares outstanding-diluted
59,997

 
59,201

 
58,092

Earnings per common share attributable to Avista Corporation shareholders:
Basic
$
1.85

 
$
1.32

 
$
1.73

Diluted
$
1.85

 
$
1.32

 
$
1.72

There were no shares excluded from the calculation because they were antidilutive. All stock options had exercise prices which were less than the average market price of Avista Corp. common stock during the respective period.