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|---|---|---|
 0000898430-25-000052-index-headers.html | 2025-01-03 13:24:28 | |
| 0000898430-25-000052-index.html | 2025-01-03 13:24:28 | |
| 0000898430-25-000052.txt | 2025-01-03 13:24:28 | |
 0000898430-25-000052-xbrl.zip | 510341 | 2025-01-03 13:24:28 |
| 302_Certification.htm | 33676 | 2025-01-03 13:24:28 |
| 8dd2595d17a48fc.htm | 4077934 | 2025-01-03 13:24:28 |
| 8dd2595d17a48fc_htm.xml | 37193 | 2025-01-03 13:24:28 |
| 906_Certification.htm | 10284 | 2025-01-03 13:24:28 |
 chartimages_3430256.jpg | 43416 | 2025-01-03 13:24:28 |
 chartimages_3430269.jpg | 81322 | 2025-01-03 13:24:28 |
| cik0000773757-20241031.xsd | 6579 | 2025-01-03 13:24:28 |
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| cik0000773757-20241031_pre.xml | 11412 | 2025-01-03 13:24:28 |
| FilingSummary.xml | 3195 | 2025-01-03 13:24:28 |
| Financial_Report.xlsx | 8834 | 2025-01-03 13:24:28 |
 images_1849.jpg | 24911 | 2025-01-03 13:24:28 |
 images_1855.jpg | 109128 | 2025-01-03 13:24:28 |
 img250cd8c31.jpg | 250062 | 2025-01-03 13:24:28 |
 imgc655ca3d2.jpg | 38453 | 2025-01-03 13:24:28 |
| MetaLinks.json | 92050 | 2025-01-03 13:24:28 |
| R1.htm | 12734 | 2025-01-03 13:24:28 |
| R2.htm | 53284 | 2025-01-03 13:24:28 |
| R3.htm | 39722 | 2025-01-03 13:24:28 |
| report.css | 2767 | 2025-01-03 13:24:28 |
| Show.js | 1085 | 2025-01-03 13:24:28 |