Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net Income	$ 96,037	$ 98,704
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,655	83,306
Deferred income taxes and investment tax credits	(6,177)	(9,708)
Changes in regulatory assets and liabilities	31,643	45,691
Pension and postretirement benefit plan expense	13,894	14,038
Contributions to pension and postretirement benefit plans	(14,633)	(24,516)
Earnings of equity-method investments	(5,379)	(5,552)
Distributions from equity-method investments	11,800	11,300
Allowance for equity funds used during construction	(13,054)	(12,018)
Other non-cash adjustments to net income, net	3,923	5,185
Change in:
Accounts receivable	(9,333)	(5,937)
Accounts payable and other accrued liabilities	(44,286)	(13,010)
Taxes accrued/receivable	23,530	22,950
Other current assets	(16,454)	(16,152)
Other current liabilities	9,350	9,054
Other assets	(1,482)	(5,439)
Other liabilities	1,039	(1,472)
Net cash provided by operating activities	166,073	196,424
Investing Activities:
Additions to property, plant and equipment	(129,860)	(133,598)
Payments received from transmission project joint funding partners	1,016	20,323
Proceeds from the sale of emission allowances and renewable energy certificates	3,702	1,650
Investments in affordable housing	2,687	0
Purchase of equity securities	(470)	(228)
Proceeds from the sale of equity securities	2,546	2,450
Other	91	495
Net cash used in investing activities	(125,662)	(108,908)
Financing Activities:
Issuance of long-term debt	0	220,000
Retirement of long-term debt	0	130,000
Dividends on common stock	(64,077)	(59,941)
Acquisition of treasury stock	(4,107)	(3,551)
Make-whole premium on retirement of long-term debt	0	4,607
Other	(55)	(2,925)
Net cash (used in) provided by financing activities	(68,239)	18,976
Net (decrease) increase in cash and cash equivalents	(27,828)	106,492
Cash and cash equivalents at beginning of the period	267,492	76,649
Cash and cash equivalents at end of the period	239,664	183,141
Supplemental Disclosure of Cash Flow Information:
Income taxes	0	0
Interest (net of amount capitalized)	42,204	39,494
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	26,700	20,650
Dividends, Common Stock, Cash	63,986	59,949
Idaho Power Company
Operating Activities:
Net Income	92,760	96,493
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,355	83,007
Deferred income taxes and investment tax credits	(5,919)	(9,505)
Changes in regulatory assets and liabilities	31,643	45,691
Pension and postretirement benefit plan expense	13,894	14,038
Contributions to pension and postretirement benefit plans	(14,633)	(24,516)
Earnings of equity-method investments	(4,265)	(4,825)
Distributions from equity-method investments	11,800	11,300
Allowance for equity funds used during construction	(13,054)	(12,018)
Other non-cash adjustments to net income, net	(744)	(220)
Change in:
Accounts receivable	(9,137)	(4,884)
Accounts payable and other accrued liabilities	(44,180)	(27,256)
Taxes accrued/receivable	25,632	37,472
Other current assets	(16,447)	(16,145)
Other current liabilities	9,432	9,099
Other assets	(1,482)	(5,439)
Other liabilities	1,083	(1,363)
Net cash provided by operating activities	161,738	190,929
Investing Activities:
Additions to property, plant and equipment	(129,860)	(133,584)
Payments received from transmission project joint funding partners	1,016	20,323
Proceeds from the sale of emission allowances and renewable energy certificates	3,702	1,650
Purchase of equity securities	(470)	(228)
Proceeds from the sale of equity securities	2,546	2,450
Other	(2)	440
Net cash used in investing activities	(123,068)	(108,949)
Financing Activities:
Issuance of long-term debt	0	220,000
Retirement of long-term debt	0	130,000
Dividends on common stock	(63,986)	(59,949)
Make-whole premium on retirement of long-term debt	0	4,607
Other	(14)	(2,920)
Net cash (used in) provided by financing activities	(64,000)	22,524
Net (decrease) increase in cash and cash equivalents	(25,330)	104,504
Cash and cash equivalents at beginning of the period	165,460	44,646
Cash and cash equivalents at end of the period	140,130	149,150
Supplemental Disclosure of Cash Flow Information:
Income taxes	2,244	0
Interest (net of amount capitalized)	42,172	39,467
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 26,700	$ 20,650