$IDA
IDACORP INC Stock $ida

$ida Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000105787713000040 Filed on February 21, 2013

Income Statement

Concept	2011 Q4	2010 Q4	2010
Revenue	$230.6M	$232.0M	$1.036B
YoY Change	-0.6%	-8.34%	-1.31%
Cost Of Revenue	$35.70M	$30.00M	$143.8M
YoY Change	19.0%	2.74%	-10.46%
Gross Profit	$194.9M	$202.0M	$892.2M
YoY Change	-3.51%	-9.78%	0.34%
Gross Profit Margin	84.52%	87.07%	86.12%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$32.10M	$30.50M	$121.8M
YoY Change	5.25%	-4.98%	2.74%
% of Gross Profit	16.47%	15.1%	13.66%
Operating Expenses	$195.4M	$162.9M	$844.2M
YoY Change	19.95%	-11.95%	-0.24%
Operating Profit	-$500.0K	$39.10M	$191.8M
YoY Change	-101.28%	0.51%	-5.78%
Interest Expense	-$15.40M	-$18.40M	$75.11M
YoY Change	-16.3%	-14.02%	3.16%
% of Operating Profit		-47.06%	39.16%
Other Income/Expense, Net	$27.80M	$4.100M	$18.98M
YoY Change	578.05%	57.69%	59.11%
Pretax Income	$12.10M	$24.70M	$141.7M
YoY Change	-51.01%	22.89%	-3.41%
Income Tax	-$200.0K	$4.500M	-$731.0K
% Of Pretax Income	-1.65%	18.22%	-0.52%
Net Earnings	$12.30M	$20.40M	$142.8M
YoY Change	-39.71%	-13.19%	14.84%
Net Earnings / Revenue	5.33%	8.79%	13.78%
Basic Earnings Per Share			$2.96
Diluted Earnings Per Share	$247.5K	$388.6K	$2.95
COMMON SHARES
Basic Shares Outstanding	49.77M shares		48.19M shares
Diluted Shares Outstanding			48.34M shares

Balance Sheet

Concept	2011 Q4	2010 Q4	2010
SHORT-TERM ASSETS
Cash & Short-Term Investments	$27.80M	$228.7M	$228.7M
YoY Change	-87.84%	331.51%	331.51%
Cash & Equivalents	$27.81M	$228.7M	$228.7M
Short-Term Investments
Other Short-Term Assets	$4.606M	$1.854M	$77.80M
YoY Change	148.44%	-98.08%	-19.63%
Inventory	$94.40M	$73.10M	$73.10M
Prepaid Expenses	$12.41M	$11.06M
Receivables	$66.30M	$62.11M	$62.10M
Other Receivables	$8.600M	$22.30M	$22.30M
Total Short-Term Assets	$311.0M	$464.0M	$464.0M
YoY Change	-32.99%	49.5%	49.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.407B	$3.161B	$3.161B
YoY Change	7.76%	8.38%	8.38%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$10.78M	$10.80M	$202.9M
YoY Change	-0.12%	-94.47%	3.89%
Other Assets	$40.35M	$41.76M	$821.6M
YoY Change	-3.38%	-94.7%	4.32%
Total Long-Term Assets	$4.614B	$4.212B	$4.212B
YoY Change	9.55%	7.22%	7.22%
TOTAL ASSETS
Total Short-Term Assets	$311.0M	$464.0M	$464.0M
Total Long-Term Assets	$4.614B	$4.212B	$4.212B
Total Assets	$4.925B	$4.676B	$4.676B
YoY Change	5.33%	10.32%	10.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$81.77M	$103.1M	$103.1M
YoY Change	-20.69%	23.03%	23.03%
Accrued Expenses	$61.50M	$23.90M	$23.90M
YoY Change	157.32%	18.91%	18.91%
Deferred Revenue
YoY Change
Short-Term Debt	$54.20M	$66.90M	$66.90M
YoY Change	-18.98%	24.35%	24.35%
Long-Term Debt Due	$101.1M	$122.6M	$122.6M
YoY Change	-17.55%	1217.98%	1218.28%
Total Short-Term Liabilities	$368.2M	$449.1M	$449.1M
YoY Change	-18.0%	105.8%	105.82%
LONG-TERM LIABILITIES
Long-Term Debt	$1.388B	$1.488B	$1.488B
YoY Change	-6.77%	5.57%	5.58%
Other Long-Term Liabilities	$75.81M	$74.47M	$636.3M
YoY Change	1.79%	-88.27%	0.24%
Total Long-Term Liabilities	$1.543B	$1.203B	$2.125B
YoY Change	28.3%	-41.17%	3.92%
TOTAL LIABILITIES
Total Short-Term Liabilities	$368.2M	$449.1M	$449.1M
Total Long-Term Liabilities	$1.543B	$1.203B	$2.125B
Total Liabilities	$1.911B	$1.652B	$3.144B
YoY Change	15.72%	-41.87%	10.65%
SHAREHOLDERS EQUITY
Retained Earnings	$819.7M	$709.4M
YoY Change	15.55%
Common Stock	$828.4M	$807.8M
YoY Change	2.54%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$29.00K	$40.00K
YoY Change	-27.5%
Treasury Stock Shares	12.18K shares	14.30K shares
Shareholders Equity	$1.636B	$1.532B	$1.532B
YoY Change
Total Liabilities & Shareholders Equity	$4.961B	$4.676B	$4.676B
YoY Change	6.09%	10.32%	10.32%

Cashflow Statement

Concept	2011 Q4	2010 Q4	2010
OPERATING ACTIVITIES
Net Income	$12.30M	$20.40M	$142.8M
YoY Change	-39.71%	-13.19%	14.84%
Depreciation, Depletion And Amortization	$32.10M	$30.50M	$121.8M
YoY Change	5.25%	-4.98%	2.74%
Cash From Operating Activities	$75.30M	$82.90M	$305.4M
YoY Change	-9.17%	33.93%	7.37%
INVESTING ACTIVITIES
Capital Expenditures	-$70.80M	-$88.90M	$338.3M
YoY Change	-20.36%	-7.68%	34.26%
Acquisitions
YoY Change
Other Investing Activities	-$1.200M	-$9.000M	-$4.918M
YoY Change	-86.67%	-742.86%	286.94%
Cash From Investing Activities	-$72.10M	-$97.70M	-$328.3M
YoY Change	-26.2%	2.95%	35.45%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			-$47.78M
YoY Change			108.74%
Debt Paid & Issued, Net			$1.064M
YoY Change			-98.81%
Cash From Financing Activities	-6.800M	58.20M	$198.6M
YoY Change	-111.68%	1.93%	9185.83%
NET CHANGE
Cash From Operating Activities	75.30M	82.90M	$305.4M
Cash From Investing Activities	-72.10M	-97.70M	-$328.3M
Cash From Financing Activities	-6.800M	58.20M	$198.6M
Net Change In Cash	-3.600M	43.40M	$175.7M
YoY Change	-108.29%	80.08%	297.86%
FREE CASH FLOW
Cash From Operating Activities	$75.30M	$82.90M	$305.4M
Capital Expenditures	-$70.80M	-$88.90M	$338.3M
Free Cash Flow	$146.1M	$171.8M	-$32.85M
YoY Change	-14.96%	8.6%	-201.12%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	81769000	USD
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	90165000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	66111000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	66296000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	5621000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	4437000	USD
CY2012Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	1005000	USD
CY2011Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	505000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2569000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	4136000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-21252000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-14191000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-17116000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11622000	USD
CY2012Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	5900000	USD
CY2010	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	338252000	USD
CY2011	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	337770000	USD
CY2012	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	239788000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1551000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1239000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Noncurrent AllowanceForDoubtfulAccountsReceivableNoncurrent	1260000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Noncurrent AllowanceForDoubtfulAccountsReceivableNoncurrent	2743000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	322000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	196000	USD
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	137880	shares
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	332182	shares
CY2010Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	16952000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	21367000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	22982000	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	936000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	984000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	-451000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	-785000	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1416000	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	3930000	USD
CY2011Q4	us-gaap	Assets Assets	4960609000	USD
CY2012Q4	us-gaap	Assets Assets	5319516000	USD
CY2010Q4	us-gaap	Assets Assets	4676055000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	367253000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	310972000	USD
CY2012Q4	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	1227212000	USD
CY2011Q4	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	1043116000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	31913000	USD
CY2011Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	22205000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	0	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	0	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	0	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	1000	USD
CY2012Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	0
CY2011Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	1
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	4220000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	6792000	USD
CY2010	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	33949000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26882000	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26331000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	27813000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26527000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	228677000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	52987000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	100000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	100000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-200864000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1286000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	175690000	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.37
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2011Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2012Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	120000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	120000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	50158486	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	49964172	shares
CY2009Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	47925882	shares
CY2010Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	49419452	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	834922000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	828389000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	163267000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	164639000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	141497000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-338000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	169000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	173000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	164808000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	141159000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	163440000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-755888000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-39518000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	547000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-10000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-45478000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	780000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	853000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	790000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	306000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-5960000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	3113000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	2967000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	23940000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	26026000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-22582000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	16204000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27018000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22655000	USD
CY2011	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-52913000	USD
CY2010	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	41742000	USD
CY2012	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	26293000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-9822000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1285000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4436000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	10594000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	2796000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5380000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	345161000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	56532000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	16159000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	53254000	USD
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CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	453647000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5834000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	55085000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	45473000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	145710000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	119310000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	122445000	USD
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CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	17856000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	12958000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1291731000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1101049000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Other Capitalized Costs DeferredTaxLiabilitiesDeferredExpenseOtherCapitalizedCosts	5114000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Other Capitalized Costs DeferredTaxLiabilitiesDeferredExpenseOtherCapitalizedCosts	3464000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	19178000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	19749000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	894616000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	772047000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	19013000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	16145000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Prepaid Pension Costs DeferredTaxLiabilitiesPrepaidPensionCosts	142270000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Prepaid Pension Costs DeferredTaxLiabilitiesPrepaidPensionCosts	122712000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	333335000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	406283000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	16832000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	0	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	599992000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	677795000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	121849000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	128611000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	124659000	USD
CY2012Q4	us-gaap	Derivative Asset Fair Value Net DerivativeAssetFairValueNet	5882000	USD
CY2011Q4	us-gaap	Derivative Asset Fair Value Net DerivativeAssetFairValueNet	6316000	USD
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	3875000	USD
CY2011Q4	us-gaap	Derivative Assets DerivativeAssets	3754000	USD
CY2012Q4	us-gaap	Derivative Financial Instruments Liabilities Fair Value Disclosure DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure	1055000	USD
CY2011Q4	us-gaap	Derivative Financial Instruments Liabilities Fair Value Disclosure DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure	4707000	USD
CY2012Q4	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	2356000	USD
CY2011Q4	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	7269000	USD
CY2012Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	2400000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	42343000	USD
CY2012	us-gaap	Derivatives Methods Of Accounting Nonhedging Derivatives DerivativesMethodsOfAccountingNonhedgingDerivatives	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">All commodity-related derivative instruments not meeting the normal purchases and normal sales exception to derivative accounting are recorded at fair value on the balance sheet.  Because of Idaho Power's PCA mechanisms, unrealized gains and losses associated with the changes in fair value of these derivative instruments are recorded as regulatory assets or liabilities. With the exception of forward contracts for the purchase of natural gas for use at Idaho Power’s natural gas generation facilities, Idaho Power’s physical forward contracts qualify for the normal purchases and normal sales exception.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">All of Idaho Power's derivative instruments have been entered into for the purpose of economically hedging forecasted purchases and sales, though none of these instruments have been designated as cash flow hedges under derivative accounting guidance. Idaho Power offsets fair value amounts recognized on its balance sheet related to derivative instruments executed with the same counterparty under the same master netting agreement.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2012	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Settlement gains and losses on electricity swap contracts are recorded on the income statement in off-system sales or purchased power depending on the forecasted position being economically hedged by the derivative contract.  Settlement gains and losses on both financial and physical contracts for natural gas are reflected in fuel expense.  Settlement gains and losses on diesel derivatives are recorded in other operations and maintenance expense.</font></div></div>
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.37
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.96
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.38
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.95
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.37
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.36
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.134
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.005
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.455
CY2010	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	870371000	USD
CY2011	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	834545000	USD
CY2012	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	937765000	USD
CY2012	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	1076725000	USD
CY2010	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	1033052000	USD
CY2011	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	1022728000	USD
CY2011	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	101602000	USD
CY2012	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	61534000	USD
CY2010	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	78133000	USD
CY2011Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	39726000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2011Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	47865000	USD
CY2012Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	42388000	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6530000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2500000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	18546000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	10782000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	11596000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	17909000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20015000	USD
CY2012	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">IDACORP and Idaho Power enter into financial agreements and power purchase and sale agreements that include indemnification provisions relating to various forms of claims or liabilities that may arise from the transactions contemplated by these agreements.  Generally, a maximum obligation is not explicitly stated in the indemnification provisions and, therefore, the overall maximum amount of the obligation under such indemnification provisions cannot be reasonably estimated.  IDACORP and Idaho Power periodically evaluate the likelihood of incurring costs under such indemnities based on their historical experience and the evaluation of the specific indemnities.  As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;">, management believes the likelihood is remote that IDACORP or Idaho Power would be required to perform under such indemnification provisions or otherwise incur any significant losses with respect to such indemnification obligations.  Neither IDACORP nor Idaho Power has recorded any liability on their respective consolidated balance sheets with respect to these indemnification obligations.</font></div></div>
CY2012	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	141729000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	195047000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	114729000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-328000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	798000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3008000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26113000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-52133000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-731000	USD
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	-731000	USD
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	-52133000	USD
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	26113000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	68206000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	40096000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	49723000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	13138000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	14100000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	14398000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-5458000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-9740000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1736000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7503000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1375000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4565000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	74436000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	0	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	0	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	3267000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	3378000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	3355000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	7309000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	6438000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	5493000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-63138000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-1138000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-12405000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1451000	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-27112000	USD
CY2012Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1753000	USD
CY2011Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	421000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10580000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	4014000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	5428000	USD
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-14216000	USD
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-604000	USD
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	15113000	USD
CY2010	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-3848000	USD
CY2011	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	19684000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	4077000	USD
CY2012	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-8500000	USD
CY2011	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2171000	USD
CY2010	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	13682000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7064000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3662000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4330000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-5376000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-4229000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-7412000	USD
CY2010	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	46510000	USD
CY2011	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	68045000	USD
CY2012	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-53468000	USD
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	32000	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	16000	shares
CY2012	us-gaap	Interest Expense InterestExpense	73869000	USD
CY2011	us-gaap	Interest Expense InterestExpense	71526000	USD
CY2010	us-gaap	Interest Expense InterestExpense	75114000	USD
CY2012	us-gaap	Interest Expense Debt InterestExpenseDebt	78922000	USD
CY2010	us-gaap	Interest Expense Debt InterestExpenseDebt	80490000	USD
CY2011	us-gaap	Interest Expense Debt InterestExpenseDebt	79349000	USD
CY2011	us-gaap	Interest Expense Other InterestExpenseOther	5510000	USD
CY2012	us-gaap	Interest Expense Other InterestExpenseOther	6876000	USD
CY2010	us-gaap	Interest Expense Other InterestExpenseOther	5299000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	70887000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	70969000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	69049000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	22311000	USD
CY2011Q4	us-gaap	Interest Payable Current InterestPayableCurrent	21797000	USD
CY2012	us-gaap	Investment Tax Credit InvestmentTaxCredit	9056000	USD
CY2011	us-gaap	Investment Tax Credit InvestmentTaxCredit	-1132000	USD
CY2010	us-gaap	Investment Tax Credit InvestmentTaxCredit	-1533000	USD
CY2012Q4	us-gaap	Investments Investments	190379000	USD
CY2011Q4	us-gaap	Investments Investments	201142000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4960609000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5319516000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	351303000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	368247000	USD
CY2012Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1738615000	USD
CY2011Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1543118000	USD
CY2012Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	22646000	USD
CY2011Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	24060000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	1537696000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	1488614000	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	101064000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	71064000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1465343000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	71064000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1064000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1064000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1064000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1064000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1466632000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1387550000	USD
CY2012Q4	us-gaap	Long Term Investments LongTermInvestments	189020000	USD
CY2011Q4	us-gaap	Long Term Investments LongTermInvestments	199931000	USD
CY2011Q4	us-gaap	Longterm Pollution Control Bond Current And Noncurrent LongtermPollutionControlBondCurrentAndNoncurrent	170460000	USD
CY2012Q4	us-gaap	Longterm Pollution Control Bond Current And Noncurrent LongtermPollutionControlBondCurrentAndNoncurrent	170460000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-178749000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	198624000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-6734000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	4213000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	4040000	USD
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Nature of Business</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">IDACORP is a holding company formed in 1998 whose principal operating subsidiary is Idaho Power.  Idaho Power is an electric utility with a service territory covering approximately 24,000 square miles in southern Idaho and eastern Oregon.  Idaho Power is regulated primarily by the Federal Energy Regulatory Commission (FERC) and the state regulatory commissions of Idaho and Oregon.  Idaho Power is the parent of Idaho Energy Resources Co. (IERCo), a joint venturer in Bridger Coal Company (BCC), which mines and supplies coal to the Jim Bridger generating plant owned in part by Idaho Power.</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">IDACORP’s other wholly-owned subsidiaries include IDACORP Financial Services, Inc. (IFS), an investor in affordable housing and other real estate investments; Ida-West Energy Company (Ida-West), an operator of small hydroelectric generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978 (PURPA); and IDACORP Energy Services Co. (IESCo), which is the former limited partner of, and current successor by merger to, IDACORP Energy L.P. (IE), a marketer of energy commodities that wound down operations in 2003.</font></div></div>
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-328334000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-332358000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-243821000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	249269000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	305400000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	310243000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	168761000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	166693000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	142798000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	173000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-338000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	169000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	27802000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	18984000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	24364000	USD
CY2010	us-gaap	Notes Issued1 NotesIssued1	1509000	USD
CY2012	us-gaap	Notes Issued1 NotesIssued1	0	USD
CY2011	us-gaap	Notes Issued1 NotesIssued1	0	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	871404000	USD
CY2010	us-gaap	Operating Expenses OperatingExpenses	844218000	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	838060000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	191811000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	242602000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	155352000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4606000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4948000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	40352000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	49260000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1654000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2450000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	7061000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-4532000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1062000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1573000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1567000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-400000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1149000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	738000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-257000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1006000	USD
CY2011Q4	us-gaap	Other Deductions Or Allowable Credits OtherDeductionsOrAllowableCredits	17000000	USD
CY2011	us-gaap	Other General Expense OtherGeneralExpense	13042000	USD
CY2012	us-gaap	Other General Expense OtherGeneralExpense	12039000	USD
CY2010	us-gaap	Other General Expense OtherGeneralExpense	11474000	USD
CY2010	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	3040000	USD
CY2011	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2303000	USD
CY2012	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2279000	USD
CY2011Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	46490000	USD
CY2012Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	51037000	USD
CY2011Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	39448000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	24438000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	75805000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	65228000	USD
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5919000	USD
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4487000	USD
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-3061000	USD
CY2012	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	-208000	USD
CY2010	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	-287000	USD
CY2011	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	-213000	USD
CY2011	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	107000	USD
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	409000	USD
CY2010	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1886000	USD
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5473000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4209000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4621000	USD
CY2011Q4	us-gaap	Other Receivables OtherReceivables	8197000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	23608000	USD
CY2012	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	3937000	USD
CY2011	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	4028000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-340000	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2011	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2645000	USD
CY2010	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	2977000	USD
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	0	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4918000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	869000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2062000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1933000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	57872000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	59668000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	68928000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	0	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	7000000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	7000000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-3296000	USD
CY2010	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2012	us-gaap	Payments To Acquire Partners Interest In Real Estate Partnership Net Of Cash Acquired PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired	139000	USD
CY2010	us-gaap	Payments To Acquire Partners Interest In Real Estate Partnership Net Of Cash Acquired PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired	13390000	USD
CY2011	us-gaap	Payments To Acquire Partners Interest In Real Estate Partnership Net Of Cash Acquired PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired	1558000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	338252000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	239761000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	337765000	USD
CY2011	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	22088000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	47695000	USD
CY2010	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	65601000	USD
CY2010	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	14728000	USD
CY2011	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	45223000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	45230000	USD
CY2011Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	363209000	USD
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	423409000	USD
CY2011Q4	us-gaap	Plant Held For Future Use Amount PlantHeldForFutureUseAmount	6974000	USD
CY2012Q4	us-gaap	Plant Held For Future Use Amount PlantHeldForFutureUseAmount	7101000	USD
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	25484000	USD
CY2011Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	12405000	USD
CY2012Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	12823000	USD
CY2010	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	24000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17501000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4882000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	48644000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	200000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	150000000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-885000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5062000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3365000	USD
CY2010	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	13150000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-12700000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	15500000	USD
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2010	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	18982000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	166862000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	142460000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	168934000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3536031000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3406590000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	18877000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	17847000	USD
CY2010	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	16551000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	22433000	USD
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	25484000	USD
CY2010	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	16551000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	22433000	USD
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-13333000	USD
CY2010	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-10675000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-11929000	USD
CY2010	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.080
CY2011	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.078
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.077
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1677609000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1703159000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	591475000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	298470000	USD
CY2011	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0283
CY2012	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0275
CY2010	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0284
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Distribution PublicUtilitiesPropertyPlantAndEquipmentDistribution	1411740000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Distribution PublicUtilitiesPropertyPlantAndEquipmentDistribution	1434925000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	2217334000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Generation Or Processing PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing	1832287000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2789264000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	3212613000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	355295000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	327877000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	4915772000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	4466873000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission PublicUtilitiesPropertyPlantAndEquipmentTransmission	931403000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Transmission PublicUtilitiesPropertyPlantAndEquipmentTransmission	871784000	USD
CY2010	us-gaap	Quantifying Misstatement In Current Year Financial Statements Amount QuantifyingMisstatementInCurrentYearFinancialStatementsAmount	6900000	USD
CY2011	us-gaap	Quantifying Misstatement In Current Year Financial Statements Amount QuantifyingMisstatementInCurrentYearFinancialStatementsAmount	8900000	USD
CY2012Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	50740000	USD
CY2011Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	62556000	USD
CY2012	us-gaap	Reclassifications Reclassifications	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassifications</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior year amounts on the IDACORP consolidated statements of income have been reclassified to conform to the current year presentation. In the current year, the allowance for equity funds used during construction has been classified to a separate line item. Previously, such amounts had been classified within the line item captioned "Other Income, Net." In addition, the components of the line item "Other interest, net of AFUDC" have been expanded to present a separate line item for the portion attributable to the allowance for borrowed funds used during construction. See also Note 18 concerning a corrective reclassification made to certain 2011 and 2010 operating expenses.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">To conform with IDACORP's and Idaho Power's 2012 consolidated balance sheet presentation, certain employee compensation liabilities as of December 31, 2011, have been reclassified from "Accounts payable" and "Other" current liabilities and are now reported in the accompanying 2011 consolidated balance sheet in a separate line item captioned "Accrued compensation."</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Previously reported net income, cash flows, and shareholders' equity were not affected by these reclassifications.</font></div></div>
CY2011Q4	us-gaap	Regulatory Assets RegulatoryAssets	987347000	USD
CY2012Q4	us-gaap	Regulatory Assets RegulatoryAssets	1163038000	USD
CY2011Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	34279000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	30078000	USD
CY2011Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	953068000	USD
CY2012Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1132960000	USD
CY2012Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	385639000	USD
CY2011Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	361795000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1064000	USD
CY2012Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	30277000	USD
CY2011Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	29738000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	355362000	USD
CY2011Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	332057000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	101064000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	121064000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	940968000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	840916000	USD
CY2010	us-gaap	Sales Revenue Net SalesRevenueNet	1036029000	USD
CY2011	us-gaap	Sales Revenue Net SalesRevenueNet	1026756000	USD
CY2012	us-gaap	Sales Revenue Net SalesRevenueNet	1080662000	USD
CY2011Q4	us-gaap	Secured Debt SecuredDebt	1295000000	USD
CY2012Q4	us-gaap	Secured Debt SecuredDebt	1345000000	USD
CY2012Q4	us-gaap	Secured Debt Current SecuredDebtCurrent	71064000	USD
CY2011Q4	us-gaap	Secured Debt Current SecuredDebtCurrent	101064000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P5Y
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	15206	shares
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	69700000	USD
CY2011Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	54200000	USD
CY2011Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0047
CY2012Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0050
CY2011	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	65574000	USD
CY2012	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	61525000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1758753000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1657654000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1762966000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1661694000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1535984000	USD
CY2011	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	28895000	USD
CY2012	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	30489000	USD
CY2010	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	24046000	USD
CY2012Q4	us-gaap	Trading Securities Fair Value Disclosure TradingSecuritiesFairValueDisclosure	2478000	USD
CY2011Q4	us-gaap	Trading Securities Fair Value Disclosure TradingSecuritiesFairValueDisclosure	3439000	USD
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1817	shares
CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	12177	shares
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	21000	USD
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	29000	USD
CY2009Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1138000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	74436000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-66379000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-1138000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2822000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	71614000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	-8057000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	0	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	0	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	200000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	200000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-200000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	0	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Management Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Management makes estimates and assumptions when preparing financial statements in conformity with generally accepted accounting principles (GAAP).  These estimates and assumptions include those related to rate regulation, retirement benefits, contingencies, litigation, asset impairment, income taxes, unbilled revenues, and bad debt.  These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period.  These estimates involve judgments with respect to, among other things, future economic factors that are difficult to predict and are beyond management’s control.  As a result, actual results could differ from those estimates.</font></div></div>
CY2012	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	826021000	USD
CY2011	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	858362000	USD
CY2010	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	832744000	USD
CY2011	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	119789000	USD
CY2012	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	123941000	USD
CY2010	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	115921000	USD
CY2010	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	159673000	USD
CY2012	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	159413000	USD
CY2011	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	131542000	USD
CY2011	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	338640000	USD
CY2010	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	293925000	USD
CY2012	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	349033000	USD
CY2012	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	196935000	USD
CY2011	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	163336000	USD
CY2010	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	143769000	USD
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	49558000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48340000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	50010000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48193000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49930000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49457000	shares
CY2012Q4	ida	Accrued Unbilled Revenue AccruedUnbilledRevenue	51448000	USD
CY2011Q4	ida	Accrued Unbilled Revenue AccruedUnbilledRevenue	46441000	USD
CY2012Q4	ida	American Falls Bond Guarantee AmericanFallsBondGuarantee	19885000	USD
CY2011Q4	ida	American Falls Bond Guarantee AmericanFallsBondGuarantee	19885000	USD
CY2011	ida	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	2223000	USD
CY2010	ida	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	1845000	USD
CY2012	ida	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	12323000	USD
CY2011Q4	ida	Deferred Tax Assets Construction Advances DeferredTaxAssetsConstructionAdvances	5118000	USD
CY2012Q4	ida	Deferred Tax Assets Construction Advances DeferredTaxAssetsConstructionAdvances	3010000	USD
CY2012Q4	ida	Deferred Tax Assets Power Cost Adjustments DeferredTaxAssetsPowerCostAdjustments	0	USD
CY2011Q4	ida	Deferred Tax Assets Power Cost Adjustments DeferredTaxAssetsPowerCostAdjustments	1711000	USD
CY2011Q4	ida	Deferred Tax Liability Fixed Cost Adjustment DeferredTaxLiabilityFixedCostAdjustment	5652000	USD
CY2012Q4	ida	Deferred Tax Liability Fixed Cost Adjustment DeferredTaxLiabilityFixedCostAdjustment	5246000	USD
CY2011	ida	Federal Uncertain Tax Positions Expense Benefit FederalUncertainTaxPositionsExpenseBenefit	-66225000	USD
CY2012	ida	Federal Uncertain Tax Positions Expense Benefit FederalUncertainTaxPositionsExpenseBenefit	0	USD
CY2010	ida	Federal Uncertain Tax Positions Expense Benefit FederalUncertainTaxPositionsExpenseBenefit	65222000	USD
CY2012Q4	ida	Earnings Test Does Not Apply To Refunding Bonds That Mature In Less Than This Period Of Time EarningsTestDoesNotApplyToRefundingBondsThatMatureInLessThanThisPeriodOfTime	P2Y
CY2010	ida	Effective Income Tax Rate Reconciliation Removal Costs EffectiveIncomeTaxRateReconciliationRemovalCosts	-2850000	USD
CY2011	ida	Effective Income Tax Rate Reconciliation Removal Costs EffectiveIncomeTaxRateReconciliationRemovalCosts	-2244000	USD
CY2012	ida	Effective Income Tax Rate Reconciliation Removal Costs EffectiveIncomeTaxRateReconciliationRemovalCosts	-2697000	USD
CY2010	ida	Energy Efficiency Programs EnergyEfficiencyPrograms	44184000	USD
CY2012	ida	Energy Efficiency Programs EnergyEfficiencyPrograms	27300000	USD
CY2011	ida	Energy Efficiency Programs EnergyEfficiencyPrograms	37663000	USD
CY2012Q4	ida	Extension Period Of Credit Agreements ExtensionPeriodOfCreditAgreements	P1Y
CY2012	ida	Fair Value All Levels Transfers Amount FairValueAllLevelsTransfersAmount	0	USD
CY2012	ida	Impairment Of Receivables ImpairmentOfReceivables	0	USD
CY2012	ida	Income Tax Reconciliation Afudc IncomeTaxReconciliationAfudc	-12027000	USD
CY2010	ida	Income Tax Reconciliation Afudc IncomeTaxReconciliationAfudc	-9529000	USD
CY2011	ida	Income Tax Reconciliation Afudc IncomeTaxReconciliationAfudc	-13586000	USD
CY2011	ida	Income Tax Reconciliation Capitalized Interest IncomeTaxReconciliationCapitalizedInterest	6465000	USD
CY2010	ida	Income Tax Reconciliation Capitalized Interest IncomeTaxReconciliationCapitalizedInterest	3674000	USD
CY2012	ida	Income Tax Reconciliation Capitalized Interest IncomeTaxReconciliationCapitalizedInterest	5075000	USD
CY2011	ida	Income Tax Reconciliation Capitalized Overhead Costs IncomeTaxReconciliationCapitalizedOverheadCosts	-5950000	USD
CY2010	ida	Income Tax Reconciliation Capitalized Overhead Costs IncomeTaxReconciliationCapitalizedOverheadCosts	-3500000	USD
CY2012	ida	Income Tax Reconciliation Capitalized Overhead Costs IncomeTaxReconciliationCapitalizedOverheadCosts	-8750000	USD
CY2010	ida	Income Tax Reconciliation Capitalized Repair Costs IncomeTaxReconciliationCapitalizedRepairCosts	-10500000	USD
CY2012	ida	Income Tax Reconciliation Capitalized Repair Costs IncomeTaxReconciliationCapitalizedRepairCosts	-19250000	USD
CY2011	ida	Income Tax Reconciliation Capitalized Repair Costs IncomeTaxReconciliationCapitalizedRepairCosts	-14000000	USD
CY2010	ida	Income Tax Reconciliation Tax Method Change Capitalized Repairs IncomeTaxReconciliationTaxMethodChangeCapitalizedRepairs	-44466000	USD
CY2011	ida	Income Tax Reconciliation Tax Method Change Capitalized Repairs IncomeTaxReconciliationTaxMethodChangeCapitalizedRepairs	0	USD
CY2012	ida	Income Tax Reconciliation Tax Method Change Capitalized Repairs IncomeTaxReconciliationTaxMethodChangeCapitalizedRepairs	-7845000	USD
CY2010	ida	Income Tax Reconciliation Tax Method Change Uniform Capitalization IncomeTaxReconciliationTaxMethodChangeUniformCapitalization	-65333000	USD
CY2012	ida	Income Tax Reconciliation Tax Method Change Uniform Capitalization IncomeTaxReconciliationTaxMethodChangeUniformCapitalization	0	USD
CY2011	ida	Income Tax Reconciliation Tax Method Change Uniform Capitalization IncomeTaxReconciliationTaxMethodChangeUniformCapitalization	0	USD
CY2012	ida	Increase Decrease In Accounts Receivable And Prepayments IncreaseDecreaseInAccountsReceivableAndPrepayments	-3919000	USD
CY2011	ida	Increase Decrease In Accounts Receivable And Prepayments IncreaseDecreaseInAccountsReceivableAndPrepayments	-2232000	USD
CY2010	ida	Increase Decrease In Accounts Receivable And Prepayments IncreaseDecreaseInAccountsReceivableAndPrepayments	14243000	USD
CY2010	ida	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	115000	shares
CY2012	ida	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	76000	shares
CY2011	ida	Incremental Common Shares Attributable To Restricted Stock IncrementalCommonSharesAttributableToRestrictedStock	85000	shares
CY2012Q4	ida	Investment Tax Credit Percent InvestmentTaxCreditPercent	0.03
CY2012	ida	Power Cost Adjustment PowerCostAdjustment	-61090000	USD
CY2012	ida	Other Electric Utility Revenue OtherElectricUtilityRevenue	77426000	USD
CY2010	ida	Proceeds From Sale Of Emission Allowances And Recs ProceedsFromSaleOfEmissionAllowancesAndRecs	6408000	USD
CY2012	ida	Proceeds From Sale Of Emission Allowances And Recs ProceedsFromSaleOfEmissionAllowancesAndRecs	2739000	USD
CY2011	ida	Proceeds From Sale Of Emission Allowances And Recs ProceedsFromSaleOfEmissionAllowancesAndRecs	6314000	USD
CY2012Q4	ida	Late Payment Fee Customer Billings LatePaymentFeeCustomerBillings	0.01
CY2012	ida	Maturity Period Of Short Term Investments MaturityPeriodOfShortTermInvestments	P90D
CY2012Q4	ida	Milner Dam Note Guarantee MilnerDamNoteGuarantee	5318000	USD
CY2011Q4	ida	Milner Dam Note Guarantee MilnerDamNoteGuarantee	6382000	USD
CY2012Q4	ida	Number Of Extensions Of Credit Agreement NumberOfExtensionsOfCreditAgreement	2	Y
CY2012Q4	ida	Original Term Of Option Awards OriginalTermOfOptionAwards	P10Y
CY2011	ida	Other Electric Utility Revenue OtherElectricUtilityRevenue	86581000	USD
CY2010	ida	Other Electric Utility Revenue OtherElectricUtilityRevenue	84548000	USD
CY2012Q4	ida	Period Of Time After Which Unpaid Accounts Are Deemed Late PeriodOfTimeAfterWhichUnpaidAccountsAreDeemedLate	P30D
CY2012Q4	ida	Pollution Control Revenue Bonds Variable Rate Series2000 Due2027 PollutionControlRevenueBondsVariableRateSeries2000Due2027	4360000	USD
CY2011Q4	ida	Pollution Control Revenue Bonds Variable Rate Series2000 Due2027 PollutionControlRevenueBondsVariableRateSeries2000Due2027	4360000	USD
CY2010	ida	Power Cost Adjustment PowerCostAdjustment	51226000	USD
CY2011	ida	Power Cost Adjustment PowerCostAdjustment	38497000	USD
CY2010	ida	Restored Investment Tax Credit RestoredInvestmentTaxCredit	3378000	USD
CY2012	ida	Restored Investment Tax Credit RestoredInvestmentTaxCredit	3267000	USD
CY2011	ida	Restored Investment Tax Credit RestoredInvestmentTaxCredit	3355000	USD
CY2010	ida	State Uncertain Tax Position Expense Benefit StateUncertainTaxPositionExpenseBenefit	8076000	USD
CY2011	ida	State Uncertain Tax Position Expense Benefit StateUncertainTaxPositionExpenseBenefit	-8211000	USD
CY2012	ida	State Uncertain Tax Position Expense Benefit StateUncertainTaxPositionExpenseBenefit	0	USD
CY2010	ida	State Taxes Reduced Due To Method Changes StateTaxesReducedDueToMethodChanges	6000000	USD
CY2012Q4	ida	Time Period Expenditures Or Appropriations Can Be Made Up TimePeriodExpendituresOrAppropriationsCanBeMadeUp	P5Y
CY2012	ida	Total Uncertain Tax Positions Expense Benefit TotalUncertainTaxPositionsExpenseBenefit	0	USD
CY2010	ida	Total Uncertain Tax Positions Expense Benefit TotalUncertainTaxPositionsExpenseBenefit	73298000	USD
CY2011	ida	Total Uncertain Tax Positions Expense Benefit TotalUncertainTaxPositionsExpenseBenefit	-74436000	USD
CY2012Q4	ida	Vesting Period Of Performance Based Awards VestingPeriodOfPerformanceBasedAwards	P3Y
CY2012Q4	ida	Vesting Period Of Restricted Stock Awards VestingPeriodOfRestrictedStockAwards	P3Y
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001057877
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	50143416	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	2087821219	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	IDACORP INC.
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Trading Symbol TradingSymbol	IDA

Files In Submission

Name	View Source	Status
0001057877-13-000040-index-headers.html	Edgar Link	pending
0001057877-13-000040-index.html	Edgar Link	pending
0001057877-13-000040.txt	Edgar Link	pending
0001057877-13-000040-xbrl.zip	Edgar Link	pending
comparisonofcumulativetotalr.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
ida-20121231.xml	Edgar Link	completed
ida-20121231.xsd	Edgar Link	pending
ida-20121231_cal.xml	Edgar Link	unprocessable
ida-20121231_def.xml	Edgar Link	unprocessable
ida-20121231_lab.xml	Edgar Link	unprocessable
ida-20121231_pre.xml	Edgar Link	unprocessable
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$IDA
IDACORP INC Stock $ida

2011 Q4 Form 10-K Financial Statement

#000105787713000040 Filed on February 21, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IDA IDACORP INC Stock $ida

2011 Q4 Form 10-K Financial Statement

#000105787713000040 Filed on February 21, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IDA
IDACORP INC Stock $ida