Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-12-170653-index-headers.html | 2012-04-19 16:02:05 | |
| 0001193125-12-170653-index.html | 2012-04-19 16:02:05 | |
| 0001193125-12-170653.txt | 2012-04-19 16:02:05 | |
 0001193125-12-170653-xbrl.zip | 212349 | 2012-04-19 16:02:05 |
| cva-20120331.xml | 1625977 | 2012-04-19 16:02:05 |
| cva-20120331.xsd | 95568 | 2012-04-19 16:02:05 |
| cva-20120331_cal.xml | 112380 | 2012-04-19 16:02:05 |
| cva-20120331_def.xml | 464586 | 2012-04-19 16:02:05 |
| cva-20120331_lab.xml | 661042 | 2012-04-19 16:02:05 |
| cva-20120331_pre.xml | 537693 | 2012-04-19 16:02:05 |
| d324643d10q.htm | 1186193 | 2012-04-19 16:02:05 |
| d324643dex311.htm | 9543 | 2012-04-19 16:02:05 |
| d324643dex312.htm | 9526 | 2012-04-19 16:02:05 |
| d324643dex32.htm | 4889 | 2012-04-19 16:02:05 |
| FilingSummary.xml | 38610 | 2012-04-19 16:02:05 |
| Financial_Report.xls | 1316732 | 2012-04-19 16:02:05 |
| R1.htm | 28833 | 2012-04-19 16:02:05 |
| R10.htm | 25645 | 2012-04-19 16:02:05 |
| R11.htm | 33944 | 2012-04-19 16:02:05 |
| R12.htm | 20072 | 2012-04-19 16:02:05 |
| R13.htm | 87053 | 2012-04-19 16:02:05 |
| R14.htm | 12486 | 2012-04-19 16:02:05 |
| R15.htm | 32415 | 2012-04-19 16:02:05 |
| R16.htm | 18497 | 2012-04-19 16:02:05 |
| R17.htm | 12896 | 2012-04-19 16:02:05 |
| R18.htm | 262737 | 2012-04-19 16:02:05 |
| R19.htm | 29223 | 2012-04-19 16:02:05 |
| R2.htm | 163544 | 2012-04-19 16:02:05 |
| R20.htm | 25883 | 2012-04-19 16:02:05 |
| R21.htm | 5031 | 2012-04-19 16:02:05 |
| R22.htm | 72062 | 2012-04-19 16:02:05 |
| R23.htm | 22789 | 2012-04-19 16:02:05 |
| R24.htm | 30273 | 2012-04-19 16:02:05 |
| R25.htm | 16773 | 2012-04-19 16:02:05 |
| R26.htm | 75832 | 2012-04-19 16:02:05 |
| R27.htm | 33956 | 2012-04-19 16:02:05 |
| R28.htm | 9741 | 2012-04-19 16:02:05 |
| R29.htm | 8058 | 2012-04-19 16:02:05 |
| R3.htm | 6523 | 2012-04-19 16:02:05 |
| R30.htm | 258003 | 2012-04-19 16:02:05 |
| R31.htm | 19458 | 2012-04-19 16:02:05 |
| R32.htm | 14040 | 2012-04-19 16:02:05 |
| R33.htm | 22853 | 2012-04-19 16:02:05 |
| R34.htm | 12608 | 2012-04-19 16:02:05 |
| R35.htm | 23818 | 2012-04-19 16:02:05 |
| R36.htm | 13046 | 2012-04-19 16:02:05 |
| R37.htm | 23623 | 2012-04-19 16:02:05 |
| R38.htm | 12544 | 2012-04-19 16:02:05 |
| R39.htm | 85202 | 2012-04-19 16:02:05 |
| R4.htm | 37798 | 2012-04-19 16:02:05 |
| R40.htm | 4820 | 2012-04-19 16:02:05 |
| R41.htm | 16396 | 2012-04-19 16:02:05 |
| R42.htm | 193316 | 2012-04-19 16:02:05 |
| R43.htm | 35682 | 2012-04-19 16:02:05 |
| R44.htm | 10337 | 2012-04-19 16:02:05 |
| R45.htm | 18413 | 2012-04-19 16:02:05 |
| R46.htm | 11482 | 2012-04-19 16:02:05 |
| R47.htm | 6920 | 2012-04-19 16:02:05 |
| R48.htm | 8447 | 2012-04-19 16:02:05 |
| R49.htm | 13772 | 2012-04-19 16:02:05 |
| R5.htm | 169575 | 2012-04-19 16:02:05 |
| R50.htm | 18444 | 2012-04-19 16:02:05 |
| R51.htm | 57088 | 2012-04-19 16:02:05 |
| R52.htm | 7878 | 2012-04-19 16:02:05 |
| R53.htm | 15118 | 2012-04-19 16:02:05 |
| R54.htm | 45458 | 2012-04-19 16:02:05 |
| R55.htm | 16371 | 2012-04-19 16:02:05 |
| R56.htm | 16107 | 2012-04-19 16:02:05 |
| R57.htm | 12025 | 2012-04-19 16:02:05 |
| R58.htm | 24026 | 2012-04-19 16:02:05 |
| R59.htm | 11366 | 2012-04-19 16:02:05 |
| R6.htm | 33363 | 2012-04-19 16:02:05 |
| R60.htm | 154441 | 2012-04-19 16:02:05 |
| R61.htm | 6043 | 2012-04-19 16:02:05 |
| R62.htm | 35303 | 2012-04-19 16:02:05 |
| R63.htm | 22397 | 2012-04-19 16:02:05 |
| R64.htm | 17744 | 2012-04-19 16:02:05 |
| R65.htm | 46256 | 2012-04-19 16:02:05 |
| R66.htm | 13907 | 2012-04-19 16:02:05 |
| R67.htm | 9426 | 2012-04-19 16:02:05 |
| R68.htm | 6738 | 2012-04-19 16:02:05 |
| R69.htm | 10876 | 2012-04-19 16:02:05 |
| R7.htm | 185191 | 2012-04-19 16:02:05 |
| R70.htm | 10719 | 2012-04-19 16:02:05 |
| R71.htm | 11290 | 2012-04-19 16:02:05 |
| R8.htm | 14675 | 2012-04-19 16:02:05 |
| R9.htm | 5256 | 2012-04-19 16:02:05 |
| report.css | 2721 | 2012-04-19 16:02:05 |
| Show.js | 6423 | 2012-04-19 16:02:05 |