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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests | Arizona Public Service Company | Arizona Public Service Company Common Stock | Arizona Public Service Company Additional Paid-In Capital | Arizona Public Service Company Retained Earnings | Arizona Public Service Company Accumulated Other Comprehensive Income (Loss) | Arizona Public Service Company Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2013 |  |  | 110,280,703 | 98,944 |  |  |  |  | 71,264,947 |  |  |  |
Beginning balance at Dec. 31, 2013 |  | $ 4,340,460 | $ 2,491,558 | $ (4,308) | $ 1,785,273 | $ (78,053) | $ 145,990 | $ 4,454,874 | $ 178,162 | $ 2,379,696 | $ 1,804,398 | $ (53,372) | $ 145,990
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 414,161 |  |  | 392,185 |  | 21,976 | 427,460 |  |  | 405,484 |  | 21,976
Other comprehensive income |  | 15,651 |  |  |  | 15,651 |  | 10,556 |  |  |  | 10,556 |
Dividends on common stock |  | (125,250) |  |  | (125,250) |  |  | (125,300) |  |  | (125,300) |  |
Issuance of common stock (in shares) |  |  | 188,253 |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  | 10,659 | $ 10,659 |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock (in shares) | [1] |  |  | (83,639) |  |  |  |  |  |  |  |  |
Purchase of treasury stock | [1] | (4,598) |  | $ (4,598) |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other (in shares) |  |  |  | 160,290 |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other |  | 8,799 |  | $ 8,800 | (1) |  |  |  |  |  |  |  |
Net capital activities by noncontrolling interests |  | (15,869) |  |  |  |  | (15,869) | (15,869) |  |  |  |  | (15,869)
Ending balance (in shares) at Sep. 30, 2014 |  |  | 110,468,956 | 22,293 |  |  |  |  | 71,264,947 |  |  |  |
Ending balance at Sep. 30, 2014 |  | $ 4,644,013 | $ 2,502,217 | $ (106) | 2,052,207 | (62,402) | 152,097 | 4,751,721 | $ 178,162 | 2,379,696 | 2,084,582 | (42,816) | 152,097
Beginning balance (in shares) at Dec. 31, 2014 |  | 110,649,762 | 110,649,762 | 78,400 |  |  |  |  | 71,264,947 |  |  |  |
Beginning balance at Dec. 31, 2014 |  | $ 4,519,102 | $ 2,512,970 | $ (3,401) | 1,926,065 | (68,141) | 151,609 | 4,629,852 | $ 178,162 | 2,379,696 | 1,968,718 | (48,333) | 151,609
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 410,212 |  |  | 396,140 |  | 14,072 | 420,489 |  |  | 406,417 |  | 14,072
Other comprehensive income |  | 4,151 |  |  |  | 4,151 |  | 4,293 |  |  |  | 4,293 |
Dividends on common stock |  | (131,818) |  |  | (131,818) |  |  | (131,800) |  |  | (131,800) |  |
Other |  |  |  |  |  |  |  | 1 |  |  | 1 |  |
Issuance of common stock (in shares) |  |  | 250,868 |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  | 16,049 | $ 16,049 |  |  |  |  |  |  |  |  |  |
Purchase of treasury stock (in shares) | [1] |  |  | (93,280) |  |  |  |  |  |  |  |  |
Purchase of treasury stock | [1] | (6,096) |  | $ (6,096) |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other (in shares) |  |  |  | 118,121 |  |  |  |  |  |  |  |  |
Reissuance of treasury stock for stock-based compensation and other |  | 7,732 |  | $ 7,732 | 0 |  |  |  |  |  |  |  |
Net capital activities by noncontrolling interests |  | $ (28,013) |  |  |  |  | (28,013) | (28,013) |  |  |  |  | (28,013)
Ending balance (in shares) at Sep. 30, 2015 |  | 110,900,630 | 110,900,630 | 53,559 |  |  |  |  | 71,264,947 |  |  |  |
Ending balance at Sep. 30, 2015 |  | $ 4,791,319 | $ 2,529,019 | $ (1,765) | $ 2,190,387 | $ (63,990) | $ 137,668 | $ 4,894,822 | $ 178,162 | $ 2,379,696 | $ 2,243,336 | $ (44,040) | $ 137,668
[1] | Primarily represents shares of common stock withheld from certain stock awards for tax purposes.

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