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v2.4.1.9

Long-Term Debt and Credit Facility, Textuals (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 29, 2010 | Mar. 30, 2010 | May 23, 2012
Debt Instruments |  |  |  |  |  |
Principal amount of notes | $ 225,000,000 us-gaap_DebtInstrumentFaceAmount | $ 225,000,000 us-gaap_DebtInstrumentFaceAmount |  |  |  |
Effective interest rate | 8.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage |  |  |  |  |
Consolidated Total Indebtedness to EBITDA Ratio | 2.00:1.00 |  |  |  |  |
Conversion price of note | $ 47.80 us-gaap_DebtInstrumentConvertibleConversionPrice1 |  |  |  |  |
Payment of quarterly cash dividends | $ 1.40 us-gaap_CommonStockDividendsPerShareCashPaid | $ 1.20 us-gaap_CommonStockDividendsPerShareCashPaid | $ 1.00 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |
Maximum borrowing capacity | 300,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |  |  |  |  |
Percentage of eligible accounts receivable for borrowing base | 85.00%kalu_PercentageOfEligibleAccountsReceivableForBorrowingBase |  |  |  |  |
Percentage of eligible inventory for borrowing base | 65.00%kalu_PercentageOfEligibleInventoryForBorrowingBase |  |  |  |  |
Percentage of net orderly liquidation value of eligible inventory | 85.00%kalu_PercentageOfNetOrderlyLiquidationValueOfEligibleInventory |  |  |  |  |
Percent of eligible machinery and equipment for borrowing base | 85.00%kalu_PercentOfEligibleMachineryAndEquipmentForBorrowingBase |  |  |  |  |
Available borrowing capacity | 276,700,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity |  |  |  |  |
Remaining available borrowing capacity | 269,100,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  |  |  |  |
Interest on line of credit | 4.00%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd |  |  |  |  |
Minimum Amount of Available Borrowing to Maintain | 52,500,000 kalu_MinimumAmountofAvailableBorrowingtoMaintain |  |  |  |  |
Fixed Charge Coverage Ratio | 1.1:1.0 |  |  |  |  |
Convertible Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Principal amount of notes |  |  |  | 175,000,000 us-gaap_DebtInstrumentFaceAmount / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_ConvertibleDebtMember |  |
Interest rate |  |  |  | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_ConvertibleDebtMember |  |
Effective interest rate | 11.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |
Conversion rate of common stock shares per $1,000 of principal amount | 20.9186 us-gaap_DebtInstrumentConvertibleConversionRatio1 / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |
Principal amount in conversion feature | 1,000 kalu_PrincipalAmountInConversionFeature / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |
Call Options |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Exercise price of call options | $ 47.80 kalu_ExercisePriceOfCallOption / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_CallOptionMember |  |  |  |  |
Warrant Transactions |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Common stock sold related to option counterparties net share-settled warrants | 3.7 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_WarrantMember | 3.6 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_WarrantMember |  |  | 3.7 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_WarrantMember |
Exercise price per share of Warrants | $ 60.70 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_WarrantMember | $ 61.08 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / kalu_ConvertibleRelatedTransactionsAxis = us-gaap_WarrantMember |  |  |  |
Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Principal amount of notes |  |  |  |  |  | 225,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Interest rate |  |  |  |  |  | 8.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Debt issuance, percentage of principal amount |  |  |  |  |  | 100.00%kalu_Debtissuancepercentageofprincipalamount / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Interest expense | 19,400,000 us-gaap_InterestExpenseDebt / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember | 19,400,000 us-gaap_InterestExpenseDebt / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember | 11,800,000 us-gaap_InterestExpenseDebt / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |
Line of Credit |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |
Outstanding line of credit | 0 us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |  |  |  |  |
Letter of Credit |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |
Maximum borrowing capacity | 60,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_LetterOfCreditMember |  |  |  |  |
Outstanding line of credit | (7,600,000)us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = us-gaap_LetterOfCreditMember |  |  |  |  |
Maximum Credit Line Extension [Domain] |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |
Maximum borrowing capacity | 350,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = kalu_MaximumCreditLineExtensionDomain |  |  |  |  |
Minimum |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Payment of quarterly cash dividends | $ 0.24 us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |
Available borrowing capacity | $ 30,000,000 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |
On or after June 1, 2016 | Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Redemption price percentage of principal amount | 104.125%us-gaap_DebtInstrumentRedemptionPricePercentage / kalu_DatePeriodAxis = kalu_OnOrAfterJune12016Member / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
On or after June 1, 2018 | Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Redemption price percentage of principal amount | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage / kalu_DatePeriodAxis = kalu_OnorafterJune12018Member / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Prior to June 1, 2015 | Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Redemption price percentage of principal amount | 108.25%us-gaap_DebtInstrumentRedemptionPricePercentage / kalu_DatePeriodAxis = kalu_PriorToJune12015Member / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Percentage of original principal amount that may be redeemed | 35.00%kalu_DebtInstrumentRedemptionPercentageOfPrincipalAmount / kalu_DatePeriodAxis = kalu_PriorToJune12015Member / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
On or after June 1, 2015 but prior to June 1, 2016 | Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Redemption price percentage of principal amount | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage / kalu_DatePeriodAxis = kalu_OnOrAfterJune12015ButPriorToJune12016Member / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Change in control | Senior Notes |  |  |  |  |  |
Debt Instruments |  |  |  |  |  |
Redemption price percentage of principal amount | 101.00%us-gaap_DebtInstrumentRedemptionPricePercentage / kalu_AccountingChangesAxis = kalu_ChangeInControlMember / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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