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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table provides detail of Pinnacle West's consolidated revenue disaggregated by revenue sources (dollars in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  |
|  | 2020 | 2019 |  | 2020 | 2019 |  |  |
Retail Electric Revenue |  |  |  |  |  |  |  |  |
Residential |  | $ | 726,231 |  | $ | 668,467 |  |  | $ | 1,566,432 |  | $ | 1,452,601 |  |  |  |
Non-Residential |  | 461,168 |  | 465,602 |  |  | 1,145,640 |  | 1,194,199 |  |  |  |
Wholesale energy sales |  | 45,631 |  | 36,775 |  |  | 76,226 |  | 95,218 |  |  |  |
Transmission services for others |  | 18,000 |  | 15,841 |  |  | 48,693 |  | 46,247 |  |  |  |
Other sources |  | 3,471 |  | 4,102 |  |  | 9,030 |  | 12,553 |  |  |  |
Total operating revenues |  | $ | 1,254,501 |  | $ | 1,190,787 |  |  | $ | 2,846,021 |  | $ | 2,800,818 |  |  |  |
Schedule of Accounts Receivable | The following table provides a rollforward of Pinnacle West’s allowance for doubtful accounts (dollars in thousands):
|  | Nine Months Ended September 30, 2020 |  | Twelve Months Ended December 31, 2019
Allowance for doubtful accounts, balance at beginning of period |  | $ | 8,171 |  |  | $ | 4,069 |
Bad debt expense |  | 17,399 |  |  | 11,819 |
Actual write-offs |  | (7,501) |  |  | (7,717) |
Allowance for doubtful accounts, balance at end of period |  | $ | 18,069 |  |  | $ | 8,171 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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