XML 34 R62.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stockholders' Equity and Stock-Based Compensation Plans - Summarizes the Transactions of the SEUs (Detail) (Stock Equivalent Units [Member], USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Outstanding, Number of Options, Beginning balance | 403,262
Exercised, Number of Options | (141,600)
Forfeited, Number of Options | (3,847)
Outstanding, Number of Options, Ending balance | 313,175
Outstanding, Weighted Average Exercise Price, Beginning balance | $ 3.64
Exercised, Weighted Average Exercise Price | $ 5.52
Forfeited, Weighted Average Exercise Price | $ 9.60
Outstanding, Weighted Average Exercise Price, Ending balance | $ 3.21
Discount [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted, Number of Options | 48,213
Granted, Weighted Average Exercise Price | $ 0.00
Granted, Weighted Average Grant-Date Fair Value | $ 33.04
Market Value [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted, Number of Options | 7,147
Granted, Weighted Average Exercise Price | $ 46.03
Granted, Weighted Average Grant-Date Fair Value | $ 14.18

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options exercised. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercised
Namespace Prefix: | iosp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options exercised in period weighted average exercise price. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice
Namespace Prefix: | iosp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options forfeited in period weighted average exercise price. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice
Namespace Prefix: | iosp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options grants in period weighted average exercise price. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | iosp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options outstanding number. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingNumber
Namespace Prefix: | iosp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options outstanding weighted average exercise price. + References No definition available. + Details
Name: | iosp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | iosp_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration