Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-12-208495-index-headers.html | 2012-05-03 16:14:00 | |
| 0001193125-12-208495-index.html | 2012-05-03 16:14:00 | |
| 0001193125-12-208495.txt | 2012-05-03 16:14:00 | |
 0001193125-12-208495-xbrl.zip | 178218 | 2012-05-03 16:14:00 |
| d321372d10q.htm | 838063 | 2012-05-03 16:14:00 |
| d321372dex31.htm | 13434 | 2012-05-03 16:14:00 |
| d321372dex32.htm | 4437 | 2012-05-03 16:14:00 |
| dv-20120331.xml | 2236233 | 2012-05-03 16:14:00 |
| dv-20120331.xsd | 69454 | 2012-05-03 16:14:00 |
| dv-20120331_cal.xml | 55951 | 2012-05-03 16:14:00 |
| dv-20120331_def.xml | 257909 | 2012-05-03 16:14:00 |
| dv-20120331_lab.xml | 573968 | 2012-05-03 16:14:00 |
| dv-20120331_pre.xml | 444496 | 2012-05-03 16:14:00 |
| FilingSummary.xml | 35938 | 2012-05-03 16:14:00 |
| Financial_Report.xls | 1957455 | 2012-05-03 16:14:00 |
| R1.htm | 26705 | 2012-05-03 16:14:00 |
| R10.htm | 32367 | 2012-05-03 16:14:00 |
| R11.htm | 24605 | 2012-05-03 16:14:00 |
| R12.htm | 48564 | 2012-05-03 16:14:00 |
| R13.htm | 142090 | 2012-05-03 16:14:00 |
| R14.htm | 12827 | 2012-05-03 16:14:00 |
| R15.htm | 10341 | 2012-05-03 16:14:00 |
| R16.htm | 12311 | 2012-05-03 16:14:00 |
| R17.htm | 452149 | 2012-05-03 16:14:00 |
| R18.htm | 6379 | 2012-05-03 16:14:00 |
| R19.htm | 108493 | 2012-05-03 16:14:00 |
| R2.htm | 163597 | 2012-05-03 16:14:00 |
| R20.htm | 68320 | 2012-05-03 16:14:00 |
| R21.htm | 53748 | 2012-05-03 16:14:00 |
| R22.htm | 15169 | 2012-05-03 16:14:00 |
| R23.htm | 32470 | 2012-05-03 16:14:00 |
| R24.htm | 25380 | 2012-05-03 16:14:00 |
| R25.htm | 40966 | 2012-05-03 16:14:00 |
| R26.htm | 141941 | 2012-05-03 16:14:00 |
| R27.htm | 447115 | 2012-05-03 16:14:00 |
| R28.htm | 105953 | 2012-05-03 16:14:00 |
| R29.htm | 20693 | 2012-05-03 16:14:00 |
| R3.htm | 19614 | 2012-05-03 16:14:00 |
| R30.htm | 16352 | 2012-05-03 16:14:00 |
| R31.htm | 23194 | 2012-05-03 16:14:00 |
| R32.htm | 20687 | 2012-05-03 16:14:00 |
| R33.htm | 43521 | 2012-05-03 16:14:00 |
| R34.htm | 48929 | 2012-05-03 16:14:00 |
| R35.htm | 19830 | 2012-05-03 16:14:00 |
| R36.htm | 33894 | 2012-05-03 16:14:00 |
| R37.htm | 16631 | 2012-05-03 16:14:00 |
| R38.htm | 20109 | 2012-05-03 16:14:00 |
| R39.htm | 22937 | 2012-05-03 16:14:00 |
| R4.htm | 87973 | 2012-05-03 16:14:00 |
| R40.htm | 12391 | 2012-05-03 16:14:00 |
| R41.htm | 8285 | 2012-05-03 16:14:00 |
| R42.htm | 19191 | 2012-05-03 16:14:00 |
| R43.htm | 25407 | 2012-05-03 16:14:00 |
| R44.htm | 24797 | 2012-05-03 16:14:00 |
| R45.htm | 19269 | 2012-05-03 16:14:00 |
| R46.htm | 23758 | 2012-05-03 16:14:00 |
| R47.htm | 29370 | 2012-05-03 16:14:00 |
| R48.htm | 12259 | 2012-05-03 16:14:00 |
| R49.htm | 77635 | 2012-05-03 16:14:00 |
| R5.htm | 155396 | 2012-05-03 16:14:00 |
| R50.htm | 36190 | 2012-05-03 16:14:00 |
| R51.htm | 28236 | 2012-05-03 16:14:00 |
| R52.htm | 20576 | 2012-05-03 16:14:00 |
| R53.htm | 16219 | 2012-05-03 16:14:00 |
| R54.htm | 18441 | 2012-05-03 16:14:00 |
| R55.htm | 11831 | 2012-05-03 16:14:00 |
| R56.htm | 18316 | 2012-05-03 16:14:00 |
| R57.htm | 12667 | 2012-05-03 16:14:00 |
| R58.htm | 36489 | 2012-05-03 16:14:00 |
| R59.htm | 14687 | 2012-05-03 16:14:00 |
| R6.htm | 6453 | 2012-05-03 16:14:00 |
| R60.htm | 21363 | 2012-05-03 16:14:00 |
| R61.htm | 39043 | 2012-05-03 16:14:00 |
| R62.htm | 6383 | 2012-05-03 16:14:00 |
| R63.htm | 66307 | 2012-05-03 16:14:00 |
| R64.htm | 20399 | 2012-05-03 16:14:00 |
| R7.htm | 81872 | 2012-05-03 16:14:00 |
| R8.htm | 55954 | 2012-05-03 16:14:00 |
| R9.htm | 23241 | 2012-05-03 16:14:00 |
| report.css | 2721 | 2012-05-03 16:14:00 |
| Show.js | 6423 | 2012-05-03 16:14:00 |