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Palo Verde Sale Leaseback Variable Interest Entities - Narrative (Details) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 01, 2016 USD ($) | Jul. 07, 2014 Lease | Sep. 30, 2015 USD ($) power_plant | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) power_plant | Sep. 30, 2014 USD ($) | Dec. 31, 1986 Trust
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  |  | $ 4,862 | $ 4,125 | $ 14,072 | $ 21,976 |
Arizona Public Service Company |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Number of VIE lessor trusts |  |  | 3 |  | 3 |  | 3
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  |  | $ 4,862 | 4,125 | $ 14,072 | 21,976 |
Arizona Public Service Company | Consolidation of VIEs |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  |  | $ 5,000 | $ 4,000 | 14,000 | $ 22,000 |
Maximum payment to the VIEs' noncontrolling equity participants upon the occurrence of certain unlikely events |  |  |  |  | 114,000 |  |
VIE debt to be assumed upon the occurrence of certain unlikely events |  |  |  |  | 1,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Through 2023 |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Number of leases under which assets are retained | Lease |  | 1 |  |  |  |  |
Arizona Public Service Company | Consolidation of VIEs | Through 2033 |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Number of leases under which assets are retained | Lease |  | 2 |  |  |  |  |
Arizona Public Service Company | Consolidation of VIEs | 2015 |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Annual lease payments |  |  |  |  | 49,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2016 through 2023 |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Annual lease payments |  |  |  |  | 23,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033 |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Annual lease payments |  |  |  |  | $ 16,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033 | Maximum |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Lease period (up to) |  |  |  |  | 2 years |  |
Forecast | Arizona Public Service Company | Consolidation of VIEs |  |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |  |
Initial loss exposure to the VIE's noncontrolling equity participants during lease extension period | $ 288,000 |  |  |  |  |  |
Maximum loss exposure to the VIE's noncontrolling equity participants during lease extension period | $ 456,000 |  |  |  |  |  |

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