Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-18-157041-index-headers.html | 2018-05-09 10:59:52 | |
| 0001193125-18-157041-index.html | 2018-05-09 10:59:52 | |
| 0001193125-18-157041.txt | 2018-05-09 10:59:52 | |
 0001193125-18-157041-xbrl.zip | 106982 | 2018-05-09 10:59:52 |
| d556150d10q.htm | 463854 | 2018-05-09 10:59:52 |
| d556150dex311.htm | 9170 | 2018-05-09 10:59:52 |
| d556150dex312.htm | 9173 | 2018-05-09 10:59:52 |
| d556150dex321.htm | 3749 | 2018-05-09 10:59:52 |
| d556150dex322.htm | 3767 | 2018-05-09 10:59:52 |
| FilingSummary.xml | 39380 | 2018-05-09 10:59:52 |
| Financial_Report.xlsx | 59404 | 2018-05-09 10:59:52 |
| iosp-20180331.xml | 664025 | 2018-05-09 10:59:52 |
| iosp-20180331.xsd | 48743 | 2018-05-09 10:59:52 |
| iosp-20180331_cal.xml | 74011 | 2018-05-09 10:59:52 |
| iosp-20180331_def.xml | 179732 | 2018-05-09 10:59:52 |
| iosp-20180331_lab.xml | 422975 | 2018-05-09 10:59:52 |
| iosp-20180331_pre.xml | 315665 | 2018-05-09 10:59:52 |
| R1.htm | 21933 | 2018-05-09 10:59:52 |
| R10.htm | 7164 | 2018-05-09 10:59:52 |
| R11.htm | 46856 | 2018-05-09 10:59:52 |
| R12.htm | 14357 | 2018-05-09 10:59:52 |
| R13.htm | 11394 | 2018-05-09 10:59:52 |
| R14.htm | 23692 | 2018-05-09 10:59:52 |
| R15.htm | 18020 | 2018-05-09 10:59:52 |
| R16.htm | 12921 | 2018-05-09 10:59:52 |
| R17.htm | 11636 | 2018-05-09 10:59:52 |
| R18.htm | 13465 | 2018-05-09 10:59:52 |
| R19.htm | 20689 | 2018-05-09 10:59:52 |
| R2.htm | 47132 | 2018-05-09 10:59:52 |
| R20.htm | 5859 | 2018-05-09 10:59:52 |
| R21.htm | 7250 | 2018-05-09 10:59:52 |
| R22.htm | 23350 | 2018-05-09 10:59:52 |
| R23.htm | 27282 | 2018-05-09 10:59:52 |
| R24.htm | 7607 | 2018-05-09 10:59:52 |
| R25.htm | 5213 | 2018-05-09 10:59:52 |
| R26.htm | 48545 | 2018-05-09 10:59:52 |
| R27.htm | 14022 | 2018-05-09 10:59:52 |
| R28.htm | 11671 | 2018-05-09 10:59:52 |
| R29.htm | 25579 | 2018-05-09 10:59:52 |
| R3.htm | 21436 | 2018-05-09 10:59:52 |
| R30.htm | 17631 | 2018-05-09 10:59:52 |
| R31.htm | 9854 | 2018-05-09 10:59:52 |
| R32.htm | 13820 | 2018-05-09 10:59:52 |
| R33.htm | 13041 | 2018-05-09 10:59:52 |
| R34.htm | 18994 | 2018-05-09 10:59:52 |
| R35.htm | 23983 | 2018-05-09 10:59:52 |
| R36.htm | 26246 | 2018-05-09 10:59:52 |
| R37.htm | 4115 | 2018-05-09 10:59:52 |
| R38.htm | 35649 | 2018-05-09 10:59:52 |
| R39.htm | 19852 | 2018-05-09 10:59:52 |
| R4.htm | 12260 | 2018-05-09 10:59:52 |
| R40.htm | 20690 | 2018-05-09 10:59:52 |
| R41.htm | 4834 | 2018-05-09 10:59:52 |
| R42.htm | 11881 | 2018-05-09 10:59:52 |
| R43.htm | 4151 | 2018-05-09 10:59:52 |
| R44.htm | 20096 | 2018-05-09 10:59:52 |
| R45.htm | 20308 | 2018-05-09 10:59:52 |
| R46.htm | 16535 | 2018-05-09 10:59:52 |
| R47.htm | 17425 | 2018-05-09 10:59:52 |
| R48.htm | 8895 | 2018-05-09 10:59:52 |
| R49.htm | 38353 | 2018-05-09 10:59:52 |
| R5.htm | 114851 | 2018-05-09 10:59:52 |
| R50.htm | 15710 | 2018-05-09 10:59:52 |
| R51.htm | 17197 | 2018-05-09 10:59:52 |
| R52.htm | 32859 | 2018-05-09 10:59:52 |
| R53.htm | 15602 | 2018-05-09 10:59:52 |
| R54.htm | 4394 | 2018-05-09 10:59:52 |
| R55.htm | 34456 | 2018-05-09 10:59:52 |
| R56.htm | 25850 | 2018-05-09 10:59:52 |
| R57.htm | 36477 | 2018-05-09 10:59:52 |
| R58.htm | 20345 | 2018-05-09 10:59:52 |
| R59.htm | 26935 | 2018-05-09 10:59:52 |
| R6.htm | 15915 | 2018-05-09 10:59:52 |
| R60.htm | 9763 | 2018-05-09 10:59:52 |
| R61.htm | 9333 | 2018-05-09 10:59:52 |
| R7.htm | 69945 | 2018-05-09 10:59:52 |
| R8.htm | 5272 | 2018-05-09 10:59:52 |
| R9.htm | 28216 | 2018-05-09 10:59:52 |
| report.css | 2767 | 2018-05-09 10:59:52 |
| Show.js | 1410 | 2018-05-09 10:59:52 |