Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-13-093492-index-headers.html | 2013-03-06 13:51:30 | |
| 0001193125-13-093492-index.html | 2013-03-06 13:51:30 | |
| 0001193125-13-093492.txt | 2013-03-06 13:51:30 | |
 0001193125-13-093492-xbrl.zip | 62537 | 2013-03-06 13:51:30 |
| d447435d10k.htm | 326728 | 2013-03-06 13:51:30 |
| d447435dex311.htm | 10071 | 2013-03-06 13:51:30 |
| d447435dex312.htm | 10026 | 2013-03-06 13:51:30 |
| d447435dex321.htm | 5591 | 2013-03-06 13:51:30 |
| dtipiv-20121231.xml | 304853 | 2013-03-06 13:51:30 |
| dtipiv-20121231.xsd | 38756 | 2013-03-06 13:51:30 |
| dtipiv-20121231_cal.xml | 35218 | 2013-03-06 13:51:30 |
| dtipiv-20121231_def.xml | 150853 | 2013-03-06 13:51:30 |
| dtipiv-20121231_lab.xml | 210979 | 2013-03-06 13:51:30 |
| dtipiv-20121231_pre.xml | 183322 | 2013-03-06 13:51:30 |
| FilingSummary.xml | 20176 | 2013-03-06 13:51:30 |
| Financial_Report.xls | 266750 | 2013-03-06 13:51:30 |
| R1.htm | 37578 | 2013-03-06 13:51:30 |
| R10.htm | 8270 | 2013-03-06 13:51:30 |
| R11.htm | 7479 | 2013-03-06 13:51:30 |
| R12.htm | 16968 | 2013-03-06 13:51:30 |
| R13.htm | 26469 | 2013-03-06 13:51:30 |
| R14.htm | 19233 | 2013-03-06 13:51:30 |
| R15.htm | 4249 | 2013-03-06 13:51:30 |
| R16.htm | 39715 | 2013-03-06 13:51:30 |
| R17.htm | 49178 | 2013-03-06 13:51:30 |
| R18.htm | 15872 | 2013-03-06 13:51:30 |
| R19.htm | 26683 | 2013-03-06 13:51:30 |
| R2.htm | 89031 | 2013-03-06 13:51:30 |
| R20.htm | 16725 | 2013-03-06 13:51:30 |
| R21.htm | 51013 | 2013-03-06 13:51:30 |
| R22.htm | 18141 | 2013-03-06 13:51:30 |
| R23.htm | 6959 | 2013-03-06 13:51:30 |
| R24.htm | 27907 | 2013-03-06 13:51:30 |
| R25.htm | 12653 | 2013-03-06 13:51:30 |
| R26.htm | 17597 | 2013-03-06 13:51:30 |
| R27.htm | 14711 | 2013-03-06 13:51:30 |
| R28.htm | 13832 | 2013-03-06 13:51:30 |
| R29.htm | 7993 | 2013-03-06 13:51:30 |
| R3.htm | 6292 | 2013-03-06 13:51:30 |
| R30.htm | 19280 | 2013-03-06 13:51:30 |
| R31.htm | 3142 | 2013-03-06 13:51:30 |
| R32.htm | 47291 | 2013-03-06 13:51:30 |
| R33.htm | 24829 | 2013-03-06 13:51:30 |
| R34.htm | 6096 | 2013-03-06 13:51:30 |
| R4.htm | 42215 | 2013-03-06 13:51:30 |
| R5.htm | 25740 | 2013-03-06 13:51:30 |
| R6.htm | 56128 | 2013-03-06 13:51:30 |
| R7.htm | 14112 | 2013-03-06 13:51:30 |
| R8.htm | 6613 | 2013-03-06 13:51:30 |
| R9.htm | 4294 | 2013-03-06 13:51:30 |
| report.css | 2721 | 2013-03-06 13:51:30 |
| Show.js | 6423 | 2013-03-06 13:51:30 |