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Palo Verde (Tables)
6 Months Ended
Jun. 30, 2019
Palo Verde Generation Station  
Jointly Owned Utility Plant Interests [Line Items]  
Palo Verde Operations and Maintenance Expense
Palo Verde Operations and Maintenance Expense. Included in "Operations and maintenance" in the Company's Statements of Operations are expenses associated with Palo Verde as follows (in thousands):
 
 
2019
 
2018
Three months ended June 30,
 
$
24,237

 
$
24,977

Six months ended June 30,
 
45,581

 
47,152

Twelve months ended June 30,
 
94,883

 
98,977