Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 0	$ 0	$ 1,894
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0	4,550
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	1,851	(4,881)	3,016
Idaho Power Company
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0	0	1,894
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0	4,550
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ 1,851	$ (4,881)	$ 3,016