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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
CURRENT ASSETS |  |
Cash and cash equivalents | $ 14,484 | $ 39,488
Customer and other receivables | 215,808 | 274,691
Accrued unbilled revenues | 89,795 | 96,240
Allowance for doubtful accounts | (2,427) | (3,125)
Materials and supplies (at average cost) | 234,179 | 234,234
Fossil fuel (at average cost) | 44,227 | 45,697
Income tax receivable | 4,637 | 589
Assets from risk management activities (Note 6) | 16,089 | 15,905
Regulatory assets (Note 3) | 168,753 | 149,555
Other current assets | 40,480 | 37,242
Total current assets | 826,025 | 890,516
INVESTMENTS AND OTHER ASSETS |  |
Assets from risk management activities (Note 6) | 8,612 | 12,106
Nuclear decommissioning trust (Note 11) | 751,954 | 735,196
Other assets | 52,679 | 52,518
Total investments and other assets | 813,245 | 799,820
PROPERTY, PLANT AND EQUIPMENT |  |
Plant in service and held for future use | 16,285,916 | 16,222,232
Accumulated depreciation and amortization | (5,670,884) | (5,594,094)
Net | 10,615,032 | 10,628,138
Construction work in progress | 1,038,046 | 816,307
Palo Verde sale leaseback, net of accumulated depreciation (Note 5) | 116,418 | 117,385
Intangible assets, net of accumulated amortization | 116,014 | 123,975
Nuclear fuel, net of accumulated amortization | 138,424 | 123,139
Total property, plant and equipment | 12,023,934 | 11,808,944
DEFERRED DEBITS |  |
Regulatory assets (Note 3) | 1,203,474 | 1,214,146
Assets for other postretirement benefits (Note 4) | 190,458 | 185,997
Other | 127,965 | 128,835
Total deferred debits | 1,521,897 | 1,528,978
TOTAL ASSETS | 15,185,101 | 15,028,258
CURRENT LIABILITIES |  |
Accounts payable | 234,946 | 297,480
Accrued taxes | 181,889 | 138,600
Accrued interest | 44,489 | 56,305
Common dividends payable | 0 | 69,363
Short-term borrowings (Note 2) | 261,800 | 0
Current maturities of long-term debt (Note 2) | 357,580 | 357,580
Customer deposits | 78,825 | 73,073
Liabilities from risk management activities (Note 6) | 93,283 | 77,716
Liabilities for asset retirements | 17,217 | 28,573
Deferred fuel and purchased power regulatory liability (Note 3) | 13,083 | 9,688
Other regulatory liabilities (Note 3) | 122,471 | 136,078
Other current liabilities | 180,319 | 197,861
Total current liabilities | 1,585,902 | 1,442,317
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 2) | 3,463,032 | 3,462,391
DEFERRED CREDITS AND OTHER |  |
Deferred income taxes | 2,726,220 | 2,723,425
Regulatory liabilities (Note 3) | 1,009,418 | 994,152
Liabilities for asset retirements | 429,626 | 415,003
Liabilities for pension benefits (Note 4) | 441,605 | 480,998
Liabilities from risk management activities (Note 6) | 85,603 | 89,973
Customer advances | 110,056 | 115,609
Coal mine reclamation | 202,069 | 201,984
Deferred investment tax credit | 186,966 | 187,080
Unrecognized tax benefits | 9,631 | 9,524
Other | 194,560 | 186,345
Total deferred credits and other | $ 5,395,754 | $ 5,404,093
COMMITMENTS AND CONTINGENCIES (SEE NOTES) |  |
EQUITY |  |
Common stock, no par value; authorized 150,000,000 shares, 111,147,524 and 111,095,402 issued at respective dates | $ 2,547,065 | $ 2,541,668
Treasury stock at cost; 7,936 and 115,030 shares at respective dates | (542) | (5,806)
Total common stock | 2,546,523 | 2,535,862
Retained earnings | 2,097,246 | 2,092,803
Accumulated other comprehensive loss: |  |
Pension and other postretirement benefits | (37,063) | (37,593)
Derivative instruments | (6,707) | (7,155)
Total accumulated other comprehensive loss | (43,770) | (44,748)
Total shareholders’ equity | 4,599,999 | 4,583,917
Noncontrolling interests (Note 5) | 140,414 | 135,540
Total equity | 4,740,413 | 4,719,457
TOTAL LIABILITIES AND EQUITY | 15,185,101 | 15,028,258
Arizona Public Service Company |  |
CURRENT ASSETS |  |
Cash and cash equivalents | 4,904 | 22,056
Customer and other receivables | 215,351 | 274,428
Accrued unbilled revenues | 89,795 | 96,240
Allowance for doubtful accounts | (2,427) | (3,125)
Materials and supplies (at average cost) | 234,179 | 234,234
Fossil fuel (at average cost) | 44,227 | 45,697
Assets from risk management activities (Note 6) | 16,089 | 15,905
Regulatory assets (Note 3) | 168,753 | 149,555
Other current assets | 39,043 | 35,765
Total current assets | 809,914 | 870,755
INVESTMENTS AND OTHER ASSETS |  |
Assets from risk management activities (Note 6) | 8,612 | 12,106
Nuclear decommissioning trust (Note 11) | 751,954 | 735,196
Other assets | 34,927 | 34,455
Total investments and other assets | 795,493 | 781,757
PROPERTY, PLANT AND EQUIPMENT |  |
Plant in service and held for future use | 16,282,405 | 16,218,724
Accumulated depreciation and amortization | (5,667,713) | (5,590,937)
Net | 10,614,692 | 10,627,787
Construction work in progress | 1,025,868 | 812,845
Palo Verde sale leaseback, net of accumulated depreciation (Note 5) | 116,418 | 117,385
Intangible assets, net of accumulated amortization | 115,859 | 123,820
Nuclear fuel, net of accumulated amortization | 138,424 | 123,139
Total property, plant and equipment | 12,011,261 | 11,804,976
DEFERRED DEBITS |  |
Regulatory assets (Note 3) | 1,203,474 | 1,214,146
Assets for other postretirement benefits (Note 4) | 187,069 | 182,625
Other | 127,086 | 127,923
Total deferred debits | 1,517,629 | 1,524,694
TOTAL ASSETS | 15,134,297 | 14,982,182
CURRENT LIABILITIES |  |
Accounts payable | 232,484 | 291,574
Accrued taxes | 183,272 | 144,488
Accrued interest | 44,224 | 56,003
Common dividends payable | 0 | 69,400
Short-term borrowings (Note 2) | 261,800 | 0
Current maturities of long-term debt (Note 2) | 357,580 | 357,580
Customer deposits | 78,825 | 73,073
Liabilities from risk management activities (Note 6) | 93,283 | 77,716
Liabilities for asset retirements | 13,083 | 9,688
Deferred fuel and purchased power regulatory liability (Note 3) | 17,217 | 28,573
Other regulatory liabilities (Note 3) | 122,471 | 136,078
Other current liabilities | 172,249 | 180,535
Total current liabilities | 1,576,488 | 1,424,708
DEFERRED CREDITS AND OTHER |  |
Deferred income taxes | 2,767,124 | 2,764,489
Regulatory liabilities (Note 3) | 1,009,418 | 994,152
Liabilities for asset retirements | 429,626 | 415,003
Liabilities for pension benefits (Note 4) | 420,110 | 459,065
Liabilities from risk management activities (Note 6) | 85,603 | 89,973
Customer advances | 110,056 | 115,609
Coal mine reclamation | 202,069 | 201,984
Deferred investment tax credit | 186,966 | 187,080
Unrecognized tax benefits | 35,356 | 35,251
Other | 145,469 | 142,683
Total deferred credits and other | $ 5,391,797 | $ 5,405,289
COMMITMENTS AND CONTINGENCIES (SEE NOTES) |  |
EQUITY |  |
Total common stock | $ 178,162 | $ 178,162
Additional paid-in capital | 2,379,696 | 2,379,696
Retained earnings | 2,155,746 | 2,148,493
Accumulated other comprehensive loss: |  |
Pension and other postretirement benefits | (19,331) | (19,942)
Derivative instruments | (6,707) | (7,155)
Total shareholders’ equity | 4,687,566 | 4,679,254
Noncontrolling interests (Note 5) | 140,414 | 135,540
Total equity | 4,827,980 | 4,814,794
Long-term debt less current maturities (Note 2) | 3,338,032 | 3,337,391
Total capitalization | 8,166,012 | 8,152,185
TOTAL LIABILITIES AND EQUITY | $ 15,134,297 | $ 14,982,182

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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),19) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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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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- Definition The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 + Details
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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 + Details
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- Definition Amount of fossil fuel included in inventory classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.5(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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