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NOTES PAYABLE: Level 3 (Tables)
3 Months Ended
Sep. 30, 2011
Shedule of short term debt [Abstract] 
Schedule of Short-term Debt
 Balances and interest rates of IDACORP’s short-term borrowings were as follows at September 30, 2011 and December 31, 2010 (in thousands of dollars):
 
 
September 30,
2011
 
December 31,
2010
 
 
 

 
 

Commercial paper outstanding
 
$
51,500

 
$
66,900

Weighted-average annual interest rate
 
0.42
%
 
0.43
%