XML 37 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2012
Fair Value Measurements (Textual) [Abstract] |
Gain or loss recognized in earnings | $ 0.1

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

X
- Definition Gain recognized in earnings during the reporting period representing the amount of the fair value hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
Name: | us-gaap_GainOnFairValueHedgeIneffectiveness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration