Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-13-225880-index-headers.html | 2013-05-17 14:54:05 | |
| 0001193125-13-225880-index.html | 2013-05-17 14:54:05 | |
| 0001193125-13-225880.txt | 2013-05-17 14:54:05 | |
 0001193125-13-225880-xbrl.zip | 27450 | 2013-05-17 14:54:05 |
 BarChart1.jpg | 28265 | 2013-05-17 14:54:05 |
 BarChart2.jpg | 28265 | 2013-05-17 14:54:05 |
| cik0000773757-20130501.xml | 67769 | 2013-05-17 14:54:05 |
| cik0000773757-20130501.xsd | 7490 | 2013-05-17 14:54:05 |
| cik0000773757-20130501_cal.xml | 5071 | 2013-05-17 14:54:05 |
| cik0000773757-20130501_def.xml | 9206 | 2013-05-17 14:54:05 |
| cik0000773757-20130501_lab.xml | 155210 | 2013-05-17 14:54:05 |
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| d530256d485bpos.htm | 42051 | 2013-05-17 14:54:05 |
| FilingSummary.xml | 4080 | 2013-05-17 14:54:05 |
| Financial_Report.xls | 293670 | 2013-05-17 14:54:05 |
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| R11.htm | 26621 | 2013-05-17 14:54:05 |
| R13.htm | 329183 | 2013-05-17 14:54:05 |
| R2.htm | 128690 | 2013-05-17 14:54:05 |
| R3.htm | 26030 | 2013-05-17 14:54:05 |
| R5.htm | 34434 | 2013-05-17 14:54:05 |
| R9.htm | 34738 | 2013-05-17 14:54:05 |
| report.css | 2720 | 2013-05-17 14:54:05 |
| Show.js | 6423 | 2013-05-17 14:54:05 |