Schedule I - Condensed Financial Information of Parent - Income Statement Schedule I Level 4 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income:
Equity in income of subsidiaries	$ 11,128	$ 12,372	$ 11,939
Operating Income	282,097	253,696	291,742
Expenses:
Operating expenses	988,192	1,028,828	954,472
Interest expense	81,934	79,801	81,032
Other expenses	(7,159)	(6,328)	(17,013)
Income Before Income Taxes	240,235	210,526	254,520
Income Tax Expense (Benefit)	45,760	16,772	72,226
Net Income Attributable to IDACORP, Inc.	194,679	193,480	182,417
Other comprehensive income (loss)	2,882	(7,605)	563
Comprehensive Income Attributable to IDACORP, Inc.	197,561	185,875	182,980
IDACORP
Income:
Equity in income of subsidiaries	194,426	193,707	182,463
Investment income	1	0	3
Operating Income	194,427	193,707	182,466
Expenses:
Operating expenses	831	1,376	940
Interest expense	276	261	416
Other expenses	45	45	71
Total expenses	1,152	1,682	1,427
Income Before Income Taxes	193,275	192,025	181,039
Income Tax Expense (Benefit)	(1,404)	(1,455)	(1,378)
Net Income Attributable to IDACORP, Inc.	194,679	193,480	182,417
Other comprehensive income (loss)	2,882	(7,605)	563
Comprehensive Income Attributable to IDACORP, Inc.	$ 197,561	$ 185,875	$ 182,980