XML 50 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1

Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Estimated Useful Lives of Major Classes of Depreciable Assets

The estimated useful lives of the major classes of depreciable assets are as follows:

Buildings			7 to 25 years
Equipment			3 to 10 years

X

- Definition

Estimated Useful Life Of Property And Equipment Table [Text Block]

+ References

No definition available.

+ Details

Name:	iosp_EstimatedUsefulLifeOfPropertyAndEquipmentTableTextBlock
Namespace Prefix:	iosp_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration