Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of earnings per weighted average common share outstanding

The following table presents the calculation of Pinnacle West’s basic and diluted earnings per share for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share amounts):

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2015		2014		2015		2014
Net income attributable to common shareholders	$	257,116	$	243,961	$	396,140	$	392,185
Weighted average common shares outstanding — basic	111,036		110,686		110,984		110,579
Net effect of dilutive securities:
Contingently issuable performance shares and restricted stock units	580		417		506		383
Weighted average common shares outstanding — diluted	111,616		111,103		111,490		110,962
Earnings per average common share attributable to common shareholders — basic	$	2.32	$	2.20	$	3.57	$	3.55
Earnings per average common share attributable to common shareholders — diluted	$	2.30	$	2.20	$	3.55	$	3.53