Condensed Consolidated Balance Sheets (Parenthetical) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable, Current	$ 2,201	$ 1,551
Allowance for Doubtful Other Receivables, Current	165	322
Allowance for Doubtful Accounts Receivable, Noncurrent	1,260	1,260
Common Stock, No Par Value
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,233,463	50,158,486
Treasury Stock, Shares	1,131	1,817
Idaho Power Company
Allowance for Doubtful Accounts Receivable, Current	2,201	1,551
Allowance for Doubtful Other Receivables, Current	$ 165	$ 322
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