Schedule I - Condensed Financial Information of Parent - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 114,802	$ 56,808	$ 78,162	$ 26,527
Income taxes receivable	13,058	11,867
Deferred income taxes	0	42,359
Other	288	603
Total current assets	462,036	442,101
Other Assets:
Other	40,216	23,782
Total	6,023,314	5,701,037	5,347,380
Current Liabilities:
Accounts payable	95,526	89,324
Other	16,270	14,718
Total current liabilities	242,306	241,781
Other Liabilities:
Other	45,867	44,238
Total other liabilities	1,993,554	1,903,069
IDACORP, Inc. Shareholders’ Equity	2,057,884	1,953,201	1,850,650
Total	6,023,314	5,701,037
IDACORP
Current Assets:
Cash and cash equivalents	2,028	5,776	$ 8,898	$ 3,536
Receivables	946	1,702
Income taxes receivable	7,241	0
Deferred income taxes	0	42,766
Other	119	106
Total current assets	10,334	50,350
Investment in subsidiaries	2,007,984	1,910,084
Other Assets:
Deferred income taxes	76,410	44,546
Other	402	287
Total other assets	76,812	44,833
Total	2,095,130	2,005,267
Current Liabilities:
Notes payable	20,000	31,300
Accounts payable	13	8
Taxes accrued	0	8,950
Other	765	854
Total current liabilities	20,778	41,112
Other Liabilities:
Intercompany notes payable	15,292	9,658
Other	1,175	1,296
Total other liabilities	16,467	10,954
IDACORP, Inc. Shareholders’ Equity	2,057,885	1,953,201
Total	$ 2,095,130	$ 2,005,267