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| 0001193125-12-130253.txt | 2012-03-23 20:33:59 | |
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| d286472d10k.htm | 345117 | 2012-03-23 20:33:59 |
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| d286472dex321.htm | 5374 | 2012-03-23 20:33:59 |
| dtipiv-20111231.xml | 173241 | 2012-03-23 20:33:59 |
| dtipiv-20111231.xsd | 10473 | 2012-03-23 20:33:59 |
| dtipiv-20111231_cal.xml | 19940 | 2012-03-23 20:33:59 |
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| FilingSummary.xml | 8533 | 2012-03-23 20:33:59 |
| Financial_Report.xls | 156241 | 2012-03-23 20:33:59 |
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