Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ (344)	$ 4	$ 530	$ 359
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	170	150	340	300
Idaho Power Company
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(344)	4	530	359
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ 170	$ 150	$ 340	$ 300