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CHANGES IN IDAHO POWER RETAINED EARNINGS (Tables)
 6 Months Ended
Jun. 30, 2019
Changes in Idaho Power Retained Earnings [Abstract]  
Changes in Idaho Power Retained Earnings Table
 
 
Three months ended
June 30,
 
Six months ended
June 30,
 
 
2019
 
2018
 
2019
 
2018
Balance at beginning of period
 
$
1,418,775

 
$
1,314,472

 
$
1,409,245

 
$
1,308,702

Net income
 
51,176

 
60,637

 
92,760

 
96,493

Dividends to parent
 
(31,932
)
 
(29,863
)
 
(63,986
)
 
(59,949
)
Balance at end of period
 
$
1,438,019

 
$
1,345,246

 
$
1,438,019

 
$
1,345,246