Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities:
Net Income	$ 115,074	$ 98,117
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,889	87,764
Deferred income taxes and investment tax credits	(6,169)	(2,121)
Changes in regulatory assets and liabilities	9,311	(11,831)
Pension and postretirement benefit plan expense	14,534	14,478
Contributions to pension and postretirement benefit plans	(11,957)	(13,219)
Earnings of equity-method investments	(4,630)	(5,003)
Distributions from equity-method investments	4,100	0
Allowance for equity funds used during construction	(15,564)	(14,421)
Other non-cash adjustments to net income, net	4,428	5,989
Change in:
Accounts receivable	(15,241)	(8,943)
Accounts payable and other accrued liabilities	2,620	(30,008)
Taxes accrued/receivable	25,728	20,179
Other current assets	(48,206)	(23,889)
Other current liabilities	5,658	13,076
Other assets	(3,285)	(1,420)
Other liabilities	1,905	(135)
Net cash provided by operating activities	167,195	128,613
Investing Activities:
Additions to property, plant and equipment	(128,265)	(145,116)
Payments received from transmission project joint funding partners	2,253	1,728
Investments in affordable housing	10,164	9,394
Investments in unconsolidated affiliates	0	(2,300)
Purchases of equity securities	392	3,326
Purchases of short-term investments	(25,000)	0
Maturities of Short-term Investments	50,000	0
Proceeds from the sale of equity securities	3,197	2,630
Other	1,347	4,941
Net cash used in investing activities	(107,024)	(150,837)
Financing Activities:
Issuance of long-term debt	0	310,000
Premium on issuance of long-term debt	0	31,384
Dividends on common stock	(72,285)	(68,160)
Tax Withholding on net settlements of share-based awards	3,026	4,630
Debt issuance costs and other	(11)	(3,259)
Net cash (used in) provided by financing activities	(75,322)	265,335
Net increase (decrease) in cash and cash equivalents	(15,151)	243,111
Cash and cash equivalents at beginning of the period	275,116	217,254
Cash and cash equivalents at end of the period	259,965	460,365
Supplemental Disclosure of Cash Flow Information:
Income taxes	2,880	325
Interest (net of amount capitalized)	41,626	38,303
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	30,984	22,072
Idaho Power Company
Financing Activities:
Dividends on common stock		(67,939)
Idaho Power Company
Operating Activities:
Net Income	113,191	95,700
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88,593	87,454
Deferred income taxes and investment tax credits	(5,393)	(1,734)
Changes in regulatory assets and liabilities	9,311	(11,831)
Pension and postretirement benefit plan expense	14,534	14,478
Contributions to pension and postretirement benefit plans	(11,957)	(13,219)
Earnings of equity-method investments	(4,293)	(4,440)
Distributions from equity-method investments	4,100	0
Allowance for equity funds used during construction	(15,564)	(14,421)
Other non-cash adjustments to net income, net	(422)	1,664
Change in:
Accounts receivable	(14,535)	(10,759)
Accounts payable and other accrued liabilities	2,616	(22,065)
Taxes accrued/receivable	18,908	22,181
Other current assets	(48,203)	(23,877)
Other current liabilities	5,728	13,159
Other assets	(3,307)	(1,442)
Other liabilities	1,999	(42)
Net cash provided by operating activities	155,306	130,806
Investing Activities:
Additions to property, plant and equipment	(128,264)	(144,865)
Payments received from transmission project joint funding partners	2,253	1,728
Investments in unconsolidated affiliates	0	(2,300)
Purchases of equity securities	392	3,326
Proceeds from the sale of equity securities	3,197	2,630
Other	1,347	4,911
Net cash used in investing activities	(121,859)	(141,222)
Financing Activities:
Issuance of long-term debt	0	310,000
Premium on issuance of long-term debt	0	31,384
Dividends on common stock	(71,972)	(67,939)
Debt issuance costs and other	(9)	(3,232)
Net cash (used in) provided by financing activities	(71,981)	270,213
Net increase (decrease) in cash and cash equivalents	(38,534)	259,797
Cash and cash equivalents at beginning of the period	165,604	98,950
Cash and cash equivalents at end of the period	127,070	358,747
Supplemental Disclosure of Cash Flow Information:
Income taxes	10,046	(9,189)
Interest (net of amount capitalized)	41,616	38,291
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 30,984	$ 22,072