Condensed Consolidated Balance Sheets (Parenthetical) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts Receivable, Current	$ 1,199	$ 1,239
Allowance for Doubtful Other Receivables, Current	173	196
Allowance for Doubtful Accounts Receivable, Noncurrent	2,824	2,743
Common Stock, No Par Value
Common Stock, Shares Authorized	120,000,000	120,000,000
Common Stock, Shares, Issued	50,155,886	49,964,172
Treasury Stock, Shares	1,172	12,177
Idaho Power Company
Allowance for Doubtful Accounts Receivable, Current	1,199	1,239
Allowance for Doubtful Other Receivables, Current	$ 173	$ 196
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