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Other Income and Other Expense
 12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Other Income and Other Expense Other Income and Other Expense
 
The following table provides detail of Pinnacle West's Consolidated other income and other expense for 2019, 2018 and 2017 (dollars in thousands):
 
 
2019
 
2018
 
2017
Other income:
 

 
 

 
 

Interest income
$
10,377

 
$
8,647

 
$
3,497

Debt return on Four Corners SCR deferral (Note 4)
19,541

 
16,153

 
354

Debt return on Ocotillo modernization project (Note 4)
20,282

 
—

 
—

Miscellaneous
63

 
96

 
155

Total other income
$
50,263

 
$
24,896

 
$
4,006

Other expense:
 

 
 

 
 

Non-operating costs
$
(10,663
)
 
$
(10,076
)
 
$
(11,749
)
Investment losses — net
(1,835
)
 
(417
)
 
(4,113
)
Miscellaneous
(5,382
)
 
(7,473
)
 
(5,677
)
Total other expense
$
(17,880
)
 
$
(17,966
)
 
$
(21,539
)

Other Income and Other Expense - APS
 
The following table provides detail of APS’s other income and other expense for 2019, 2018 and 2017 (dollars in thousands):
 
 
2019
 
2018
 
2017
Other income:
 

 
 

 
 

Interest income
$
6,998

 
$
6,496

 
$
2,504

Debt return on Four Corners SCR deferral (Note 4)
19,541

 
16,153

 
354

Debt return on Ocotillo modernization project (Note 4)
20,282

 
—

 
—

Miscellaneous
63

 
97

 
155

Total other income
$
46,884

 
$
22,746

 
$
3,013

Other expense:
 

 
 

 
 

Non-operating costs
$
(9,612
)
 
$
(9,462
)
 
$
(10,825
)
Miscellaneous
(3,378
)
 
(5,830
)
 
(3,088
)
Total other expense
$
(12,990
)
 
$
(15,292
)
 
$
(13,913
)