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2313301 - Disclosure - ASSET RETIREMENT OBLIGATIONS Asset Retirement Obligations Level 3 (Tables)
(http://www.idacorpinc.com/role/AssetRetirementObligationsAssetRetirementObligationsLevel3Tables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001057877 (http://www.sec.gov/CIK)
Asset Retirement Obligation [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Asset Retirement Obligation [Abstract]
 
Schedule of Change in Asset Retirement Obligation
The following table presents the changes in the carrying amount of AROs (in thousands of dollars): 
 
 
2016
 
2015
Balance at beginning of year
 
$
26,153

 
$
21,930

Accretion expense
 
1,031

 
993

Revisions in estimated cash flows
 
1,759

 
5,043

Liability settled
 
(2,686
)
 
(1,813
)
Balance at end of year
 
$
26,257

 
$
26,153