Document Description File Type Size iosp-20170630.xml XBRL Instance Document EX-101.INS 863 KB iosp-20170630.xsd XBRL Taxonomy Extension Schema EX-101.SCH 50 KB iosp-20170630_cal.xml XBRL Taxonomy Extension Calculation Linkbase EX-101.CAL 82 KB iosp-20170630_def.xml XBRL Taxonomy Extension Definition Linkbase EX-101.DEF 184 KB iosp-20170630_lab.xml XBRL Taxonomy Extension Label Linkbase EX-101.LAB 432 KB iosp-20170630_pre.xml XBRL Taxonomy Extension Presentation Linkbase EX-101.PRE 326 KB