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Revenue (Tables)
 6 Months Ended
Jun. 30, 2022
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 June 30,Six Months Ended June 30,
2022202120222021
Retail Electric Service
Residential$537,589 $531,717 $904,935 $872,555 
Non-Residential462,669 420,995 822,185 735,778 
Wholesale Energy Sales29,902 18,007 58,805 35,604 
Transmission Services for Others29,352 22,579 54,844 41,572 
Other Sources2,157 6,951 4,431 11,215 
Total operating revenues$1,061,669 $1,000,249 $1,845,200 $1,696,724 
Schedule of accounts receivable
The following table provides a rollforward of Pinnacle West’s allowance for doubtful accounts (dollars in thousands):
June 30, 2022December 31, 2021
Allowance for doubtful accounts, balance at beginning of period$25,354 $19,782 
Bad debt expense8,119 22,251 
Actual write-offs(10,326)(16,679)
Allowance for doubtful accounts, balance at end of period$23,147 $25,354