Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating Activities:
Net Income	$ 162,802	$ 159,115
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106,304	102,366
Deferred income taxes and investment tax credits	25,265	25,355
Changes in regulatory assets and liabilities	25,776	36,595
Pension and postretirement benefit plan expense	22,668	20,927
Contributions to pension and postretirement benefit plans	(41,660)	(32,533)
Losses (earnings) of unconsolidated equity-method investments	(8,636)	(8,908)
Distributions from unconsolidated equity-method investments	9,352	5,820
Allowance for equity funds used during construction	(16,219)	(13,182)
Other non-cash adjustments to net income, net	1,444	4,417
Change in:
Accounts receivable	(14,704)	4,372
Accounts payable and other accrued liabilities	(12,210)	(3,359)
Taxes accrued/receivable	19,845	14,066
Other current assets	(178)	2,089
Other current liabilities	7,874	7,258
Other assets	2,468	(2,970)
Other liabilities	629	(5,601)
Net cash provided by operating activities	290,820	315,827
Investing Activities:
Additions to property, plant and equipment	(235,890)	(200,928)
Proceeds from the sale of emission allowances and RECs	1,855	2,923
Distributions from affordable housing investments	240	1,048
Other	883	4,335
Net cash used in investing activities	(232,912)	(192,622)
Financing Activities:
Issuance of long-term debt	250,000	0
Retirement of long-term debt	(121,064)	(1,064)
Dividends on common stock	(71,225)	(64,958)
Net change in short-term borrowings	(27,700)	(22,950)
Issuance of common stock	0	160
Acquisition of treasury stock	(3,277)	(2,737)
Make-whole premium on retirement of long-term debt	(17,872)	0
Other	(2,318)	1,220
Net cash provided by (used in) financing activities	6,544	(90,329)
Net increase in cash and cash equivalents	64,452	32,876
Cash and cash equivalents at beginning of the period	56,808	78,162
Cash and cash equivalents at end of the period	121,260	111,038
Supplemental Disclosure of Cash Flow Information:
Income taxes	4,442	4,686
Interest (net of amount capitalized)	57,630	55,743
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	12,606	19,375
Idaho Power Company
Operating Activities:
Net Income	159,528	155,154
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	105,848	101,925
Deferred income taxes and investment tax credits	(5,307)	14,087
Changes in regulatory assets and liabilities	25,776	36,595
Pension and postretirement benefit plan expense	22,646	20,903
Contributions to pension and postretirement benefit plans	(41,638)	(32,509)
Losses (earnings) of unconsolidated equity-method investments	(6,992)	(7,148)
Distributions from unconsolidated equity-method investments	8,502	4,970
Allowance for equity funds used during construction	(16,219)	(13,182)
Other non-cash adjustments to net income, net	(969)	1,188
Change in:
Accounts receivable	(17,363)	3,818
Accounts payable and other accrued liabilities	(11,967)	(3,336)
Taxes accrued/receivable	27,942	12,160
Other current assets	(189)	2,069
Other current liabilities	7,917	7,288
Other assets	2,468	(2,970)
Other liabilities	800	(5,106)
Net cash provided by operating activities	260,783	295,906
Investing Activities:
Additions to property, plant and equipment	(235,841)	(200,778)
Proceeds from the sale of emission allowances and RECs	1,855	2,923
Other	883	4,335
Net cash used in investing activities	(233,103)	(193,520)
Financing Activities:
Issuance of long-term debt	250,000	0
Retirement of long-term debt	(121,064)	(1,064)
Dividends on common stock	(71,215)	(64,957)
Make-whole premium on retirement of long-term debt	(17,872)	0
Other	(4,125)	0
Net cash provided by (used in) financing activities	35,724	(66,021)
Net increase in cash and cash equivalents	63,404	36,365
Cash and cash equivalents at beginning of the period	46,695	66,535
Cash and cash equivalents at end of the period	110,099	102,900
Supplemental Disclosure of Cash Flow Information:
Income taxes	28,336	19,793
Interest (net of amount capitalized)	57,457	55,576
Non-cash investing activities:
Additions to property, plant and equipment in accounts payable	$ 12,606	$ 19,375