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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Tabular reconciliation of the total amounts of unrecognized tax benefits, excluding interest and penalties, at the beginning and end of the year |  |  |
Total unrecognized tax benefits, beginning of the year | $ 34,447 | $ 44,775 | $ 41,997
Additions for tax positions of the current year | 2,695 | 2,175 | 4,309
Additions for tax positions of prior years | 886 | 0 | 751
Reductions for tax positions of prior years for: |  |  |
Changes in judgment | (1,953) | (10,244) | (2,282)
Settlements with taxing authorities | 0 | 0 | 0
Lapses of applicable statute of limitations | 0 | (2,259) | 0
Total unrecognized tax benefits, end of the year | 36,075 | 34,447 | 44,775
ARIZONA PUBLIC SERVICE COMPANY |  |  |
Tabular reconciliation of the total amounts of unrecognized tax benefits, excluding interest and penalties, at the beginning and end of the year |  |  |
Total unrecognized tax benefits, beginning of the year | 34,447 | 44,775 | 41,997
Additions for tax positions of the current year | 2,695 | 2,175 | 4,309
Additions for tax positions of prior years | 886 | 0 | 751
Reductions for tax positions of prior years for: |  |  |
Changes in judgment | (1,953) | (10,244) | (2,282)
Settlements with taxing authorities | 0 | 0 | 0
Lapses of applicable statute of limitations | 0 | (2,259) | 0
Total unrecognized tax benefits, end of the year | $ 36,075 | $ 34,447 | $ 44,775

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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