Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 541	$ 438	$ 1,466	$ 968
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	298	170	894	511
Idaho Power Company
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	541	438	1,466	968
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ 298	$ 170	$ 894	$ 511