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OTHER INCOME AND EXPENSES (Tables)
 12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Schedule of various non-regulated activities
The Company conducts various non-regulated activities as reflected in the table below:
 
2019
 
2018
 
2017
 
Revenue
 
Expense
 
Revenue
 
Expense
 
Revenue
 
Expense
Operating and maintenance
$
12,655

 
$
13,791

 
$
10,392

 
$
11,895

 
$
8,621

 
$
8,847

Leases
2,279

 
35

 
2,467

 
135

 
2,015

 
182

Design and construction
1,745

 
1,612

 
1,273

 
1,202

 
1,918

 
1,635

Meter reading and billing
412

 
163

 
391

 
157

 
256

 
(6
)
Interest income
92

 
—

 
133

 
—

 
68

 
—

Change in value of life insurance contracts (gain) loss
—

 
(5,104
)
 
—

 
2,340

 
—

 
(3,057
)
Other non-regulated income and expenses
2,022

 
3,372

 
3,616

 
7,058

 
3,020

 
1,789

Total
$
19,205

 
$
13,869

 
$
18,272

 
$
22,787

 
$
15,898

 
$
9,390