Schedule I - Condensed Financial Information of Parent - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 217,254	$ 267,492	$ 76,649	$ 61,480
Income taxes receivable	3,106	4,356
Other	405	3,655
Total current assets	565,146	597,640
Other Assets:
Other	61,028	62,882
Total	6,641,201	6,382,754	6,045,405
Current Liabilities:
Accounts payable	110,745	110,824
Other	16,625	11,096
Total current liabilities	374,859	258,592
Other Liabilities:
Other	45,131	43,216
Total other liabilities	2,059,130	1,913,563
IDACORP, Inc. Shareholders’ Equity	2,464,628	2,370,360	2,251,385
Total	6,641,201	6,382,754
IDACORP
Current Assets:
Cash and cash equivalents	115,141	98,900	$ 29,617	$ 15,119
Receivables	2,125	2,046
Other	98	98
Total current assets	117,364	101,044
Investment in subsidiaries	2,379,680	2,294,464
Other Assets:
Deferred income taxes	45,864	17,593
Other	429	277
Total other assets	46,293	17,870
Total	2,543,337	2,413,378
Current Liabilities:
Taxes accrued	5,622	8,354
Other	996	899
Total current liabilities	6,618	9,253
Other Liabilities:
Intercompany notes payable	71,285	32,929
Other	806	836
Total other liabilities	72,091	33,765
IDACORP, Inc. Shareholders’ Equity	2,464,628	2,370,360
Total	$ 2,543,337	$ 2,413,378