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Long-Term Debt and Liquidity Matters - Components of Long-Term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Long-Term Debt and Liquidity Matters [Line Items] |  |
Total long-term debt | $ 4,146,785 | $ 3,819,971
Long-term debt less current maturities | 4,021,785 | 3,462,391
APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | 4,058,125 |
Unamortized discount | (11,816) | (10,374)
Unamortized premium | 4,506 | 4,686
Unamortized debt issue costs | (29,030) | (27,896)
Total long-term debt | 4,021,785 | 3,694,971
Less current maturities | 0 | (357,580)
Total long-term debt less current maturities | 4,021,785 | 3,337,391
Pinnacle West |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | 4,183,125 |
Total long-term debt | 125,000 | 125,000
Long-term debt less current maturities | 0 | 125,000
Pollution Control Bonds - Variable | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | $ 35,975 | $ 92,405
Pollution Control Bonds - Variable | APS | Minimum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Weighted-average interest rate (as a percent) | 0.81% | 0.01%
Pollution Control Bonds - Variable | APS | Maximum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Weighted-average interest rate (as a percent) |  | 0.24%
Pollution Control Bonds - Fixed | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | $ 147,150 | $ 211,150
Pollution Control Bonds - Fixed | APS | Minimum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Interest rate (as a percent) | 1.75% | 1.75%
Pollution Control Bonds - Fixed | APS | Maximum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Interest rate (as a percent) | 4.70% | 4.70%
Total Pollution Control Bonds | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | $ 183,125 | $ 303,555
Senior unsecured notes | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Gross long-term debt | $ 3,725,000 | $ 3,375,000
Senior unsecured notes | APS | Minimum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Interest rate (as a percent) | 2.20% | 2.20%
Senior unsecured notes | APS | Maximum |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Interest rate (as a percent) | 8.75% | 8.75%
Term loan facility | Pinnacle West |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Total long-term debt | $ 125,000 | $ 125,000
Less current maturities | (125,000) | 0
Total long-term debt less current maturities | $ 0 | $ 125,000
Weighted-average interest rate (as a percent) | 1.52% | 1.174%
Term loan | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Weighted-average interest rate (as a percent) | 1.427% | 1.024%
Term loan | Term loan facility maturing June 26, 2018 | APS |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |
Term loans | $ 150,000 | $ 50,000

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- Definition Sum of the carrying values as of the balance sheet date of total long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date. + References No definition available. + Details
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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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