Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000898430-25-000515-index-headers.html | 2025-02-03 14:00:22 | |
| 0000898430-25-000515-index.html | 2025-02-03 14:00:22 | |
| 0000898430-25-000515.txt | 2025-02-03 14:00:22 | |
 0000898430-25-000515-xbrl.zip | 779700 | 2025-02-03 14:00:22 |
| 302_Certification.htm | 33672 | 2025-02-03 14:00:22 |
| 8dd4147f2691b09.htm | 3299613 | 2025-02-03 14:00:22 |
| 8dd4147f2691b09_htm.xml | 210057 | 2025-02-03 14:00:22 |
| 906_Certification.htm | 10281 | 2025-02-03 14:00:22 |
 chartimages_3452782.jpg | 71677 | 2025-02-03 14:00:22 |
 chartimages_3452917.jpg | 71677 | 2025-02-03 14:00:22 |
 chartimages_3452946.jpg | 71677 | 2025-02-03 14:00:22 |
 chartimages_3452967.jpg | 71677 | 2025-02-03 14:00:22 |
 chartimages_3452976.jpg | 71677 | 2025-02-03 14:00:22 |
 chartimages_3453025.jpg | 71677 | 2025-02-03 14:00:22 |
| cik0000773757-20241130.xsd | 7870 | 2025-02-03 14:00:22 |
| cik0000773757-20241130_def.xml | 10039 | 2025-02-03 14:00:22 |
| cik0000773757-20241130_lab.xml | 15728 | 2025-02-03 14:00:22 |
| cik0000773757-20241130_pre.xml | 12923 | 2025-02-03 14:00:22 |
| FilingSummary.xml | 3364 | 2025-02-03 14:00:22 |
| Financial_Report.xlsx | 13111 | 2025-02-03 14:00:22 |
 images_1861.jpg | 24911 | 2025-02-03 14:00:22 |
 images_1872.jpg | 109128 | 2025-02-03 14:00:22 |
 img8539b96a2.jpg | 38453 | 2025-02-03 14:00:22 |
 imgf3f49be71.jpg | 250062 | 2025-02-03 14:00:22 |
| MetaLinks.json | 89472 | 2025-02-03 14:00:22 |
| R1.htm | 12736 | 2025-02-03 14:00:22 |
| R2.htm | 179310 | 2025-02-03 14:00:22 |
| R3.htm | 97204 | 2025-02-03 14:00:22 |
| report.css | 2767 | 2025-02-03 14:00:22 |
| Show.js | 1085 | 2025-02-03 14:00:22 |