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Nuclear Decommissioning Trusts (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Nuclear decommissioning trust fund assets |  |  |  |  |
Fair Value | $ 712,011 |  | $ 712,011 |  | $ 713,866
Realized gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds |  |  |  |  |
Proceeds from the sale of securities |  |  | 330,304 | $ 269,276 |
Fair value of fixed income securities, summarized by contractual maturities |  |  |  |  |
Total | 712,011 |  | 712,011 |  | 713,866
Arizona Public Service Company |  |  |  |  |
Nuclear decommissioning trust fund assets |  |  |  |  |
Fair Value | 712,011 |  | 712,011 |  | 713,866
Unrealized Gains | 153,000 |  | 153,000 |  | 176,000
Unrealized Losses | (4,000) |  | (4,000) |  | (1,000)
Net payables for securities purchases |  |  |  |  | (7,000)
Realized gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds |  |  |  |  |
Realized gains | 2,000 | $ 2,000 | 4,000 | 4,000 |
Realized losses | (2,000) | (2,000) | (4,000) | (5,000) |
Proceeds from the sale of securities | 105,000 | $ 70,000 | 330,304 | $ 269,276 |
Fair value of fixed income securities, summarized by contractual maturities |  |  |  |  |
Total | 712,011 |  | 712,011 |  | 713,866
Arizona Public Service Company | Equity Securities |  |  |  |  |
Nuclear decommissioning trust fund assets |  |  |  |  |
Fair Value | 294,000 |  | 294,000 |  | 310,000
Unrealized Gains | 138,000 |  | 138,000 |  | 159,000
Unrealized Losses | (1,000) |  | (1,000) |  |
Fair value of fixed income securities, summarized by contractual maturities |  |  |  |  |
Total | 294,000 |  | 294,000 |  | 310,000
Arizona Public Service Company | Fixed income securities. |  |  |  |  |
Nuclear decommissioning trust fund assets |  |  |  |  |
Fair Value | 418,000 |  | 418,000 |  | 411,000
Unrealized Gains | 15,000 |  | 15,000 |  | 17,000
Unrealized Losses | (3,000) |  | (3,000) |  | (1,000)
Fair value of fixed income securities, summarized by contractual maturities |  |  |  |  |
Less than one year | 15,000 |  | 15,000 |  |
1 year - 5 years | 117,000 |  | 117,000 |  |
5 years - 10 years | 117,000 |  | 117,000 |  |
Greater than 10 years | 169,000 |  | 169,000 |  |
Total | $ 418,000 |  | $ 418,000 |  | $ 411,000

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- Definition The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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