XML 86 R27.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Long-Term Debt and Credit Facility (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Debt Disclosure [Abstract] |
Principal amount, carrying amount, and interest expense of the notes | The following table provides additional information regarding the Convertible Notes (in millions of dollars):
| Quarter Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Contractual coupon interest | $ | — |  |  | $ | 1.9 |  |  | $ | 2.0 |  |  | $ | 3.9 |
Amortization of discount | — |  |  | 2.3 |  |  | 2.4 |  |  | 4.4 |
Amortization of deferred financing costs | — |  |  | 0.3 |  |  | 0.3 |  |  | 0.6 |
Total interest expense 1 | $ | — |  |  | $ | 4.5 |  |  | $ | 4.7 |  |  | $ | 8.9 |
____________
1 | A portion of the interest relating to the Convertible Notes was capitalized as construction in progress.

X
- Definition Principal amount, carrying amount, and interest expense of the notes. + References No definition available. + Details
Name: | kalu_PrincipalAmountCarryingAmountAndInterestExpenseOfNotesTableTextBlock
Namespace Prefix: | kalu_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration