Condensed Consolidated Balance Sheets (Parenthetical) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable, Current	$ 1,262	$ 1,196
Allowance for Doubtful Other Receivables, Current	175	159
Allowance for Doubtful Accounts Receivable, Noncurrent	$ 552	$ 552
Common Stock, No Par Value
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,420,017	50,352,051
Treasury Stock, Shares	4,590	11,221
Idaho Power Company
Allowance for Doubtful Accounts Receivable, Current	$ 1,262	$ 1,196
Allowance for Doubtful Other Receivables, Current	$ 175	$ 159
Common Stock, Par or Stated Value Per Share	$ 2.50	$ 2.50
Common Stock, Shares Authorized	50,000,000	50,000,000
Common Stock, Shares, Issued	39,150,812	39,150,812