CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Accumulated depreciation of Palo Verde sale leaseback	$ 233,665	$ 229,795
Accumulated amortization on intangible assets	546,038	489,538
Accumulated amortization on nuclear fuel	$ 146,228	$ 143,554
EQUITY
Common stock, par value	$ 0	$ 0
Common stock, authorized shares	150,000,000	150,000,000
Common stock, issued shares	111,095,402	110,649,762
Treasury stock at cost, shares	115,030	78,400
ARIZONA PUBLIC SERVICE COMPANY
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Accumulated depreciation of Palo Verde sale leaseback	$ 233,665	$ 229,795
Accumulated amortization on intangible assets	546,038	489,538
Accumulated amortization on nuclear fuel	$ 146,228	$ 143,554