Document Description File Type Size iosp-20170930.xml XBRL Instance Document EX-101.INS 914 KB iosp-20170930.xsd XBRL Taxonomy Extension Schema EX-101.SCH 51 KB iosp-20170930_cal.xml XBRL Taxonomy Extension Calculation Linkbase EX-101.CAL 83 KB iosp-20170930_def.xml XBRL Taxonomy Extension Definition Linkbase EX-101.DEF 186 KB iosp-20170930_lab.xml XBRL Taxonomy Extension Label Linkbase EX-101.LAB 439 KB iosp-20170930_pre.xml XBRL Taxonomy Extension Presentation Linkbase EX-101.PRE 332 KB