XML 24 R104.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Commitments and Contingencies (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2011 | Mar. 31, 2010 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Commitments and Contingencies (Additional Textual) [Abstract] |  |  |  |  |
Settlement to resolve investigation matter |  | $ 40.2 |  |  |
Commitments and Contingencies (Textual) [Abstract] |  |  |  |  |
Operating Leases, Rent Expense |  |  | 2.9 | 2.6 | 2.8
Litigation settlement period for payment |  |  | 4 years |  |
Promissory note issued |  |  | 15.0 |  |
Loss contingent first date of repayment of promissory notes |  |  | Sep. 07, 2012 |  |
Payment made in the form of stock | 5.0 |  |  |  |
Stock issued for payment | 195,313 |  |  |  |
Contingent liabilities |  |  | 7.7 |  |
NewMarket Corporation [Member] |  |  |  |  |
Commitments and Contingencies (Additional Textual) [Abstract] |  |  |  |  |
Settlement to resolve investigation matter |  |  | 45.0 |  |
Litigation Settlement Amount paid | $ 25.0 |  |  |  |
Carrying simple interest per annum |  |  | 1.00% |  |
NewMarket Corporation [Member] | Promissory note [Member] |  |  |  |  |
Commitments and Contingencies (Additional Textual) [Abstract] |  |  |  |  |
Number of repayment installment |  |  | 3 |  |
Carrying simple interest per annum |  |  |  | 1.00% |

X
- Details
Name: | iosp_CommitmentsAndContingenciesAdditionalTextualAbstract
Namespace Prefix: | iosp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | iosp_CommitmentsAndContingenciesTextualAbstract
Namespace Prefix: | iosp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Litigation settlement amount paid. + References No definition available. + Details
Name: | iosp_LitigationSettlementAmountPaid
Namespace Prefix: | iosp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Litigation settlement period for payment. + References No definition available. + Details
Name: | iosp_LitigationSettlementPeriodForPayment
Namespace Prefix: | iosp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss contingent first date of repayment of promissory notes. + References No definition available. + Details
Name: | iosp_LossContingentFirstDateOfRepaymentOfPromissoryNotes
Namespace Prefix: | iosp_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of repayment installment. + References No definition available. + Details
Name: | iosp_NumberOfRepaymentInstallment
Namespace Prefix: | iosp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory note issued. + References No definition available. + Details
Name: | iosp_PromissoryNoteIssued
Namespace Prefix: | iosp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Stock issued during period share for contingent loss settlement. + References No definition available. + Details
Name: | iosp_StockIssuedDuringPeriodShareForContingentLossSettlement
Namespace Prefix: | iosp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock issued during period value for contingent loss settlement. + References No definition available. + Details
Name: | iosp_StockIssuedDuringPeriodValueForContingentLossSettlement
Namespace Prefix: | iosp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration