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OTHER INCOME AND EXPENSES (Tables)
 12 Months Ended
Dec. 31, 2015
Other Income and Expenses [Abstract]  
Schedule of various non-regulated activities
The Company conducts various non-regulated activities as reflected in the table below:
 
2015
 
2014
 
2013
 
Revenue
 
Expense
 
Revenue
 
Expense
 
Revenue
 
Expense
Operating and maintenance
$
9,385

 
$
10,438

 
$
9,748

 
$
10,256

 
$
8,028

 
$
9,119

Leases
1,929

 
208

 
2,029

 
208

 
1,938

 
243

Design and construction
1,399

 
1,292

 
1,258

 
1,102

 
1,374

 
1,173

Meter reading and billing
597

 
434

 
803

 
615

 
1,313

 
1,055

Interest income
39

 
—

 
186

 
—

 
70

 
—

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

 
218

 
—

 
(994
)
 
—

 
(1,878
)
Other non-regulated income and expenses
2,275

 
1,454

 
3,294

 
3,098

 
2,072

 
1,553

Total
$
15,624

 
$
14,044

 
$
17,318

 
$
14,285

 
$
14,795

 
$
11,265