Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001166928-16-000145-index-headers.html | 2016-04-28 08:27:26 | |
| 0001166928-16-000145-index.html | 2016-04-28 08:27:26 | |
| 0001166928-16-000145.txt | 2016-04-28 08:27:26 | |
 0001166928-16-000145-xbrl.zip | 266574 | 2016-04-28 08:27:26 |
| FilingSummary.xml | 34837 | 2016-04-28 08:27:26 |
| Financial_Report.xlsx | 85316 | 2016-04-28 08:27:26 |
| R1.htm | 22402 | 2016-04-28 08:27:26 |
| R10.htm | 27283 | 2016-04-28 08:27:26 |
| R11.htm | 250530 | 2016-04-28 08:27:26 |
| R12.htm | 682377 | 2016-04-28 08:27:26 |
| R13.htm | 54205 | 2016-04-28 08:27:26 |
| R14.htm | 37965 | 2016-04-28 08:27:26 |
| R15.htm | 48187 | 2016-04-28 08:27:26 |
| R16.htm | 21366 | 2016-04-28 08:27:26 |
| R17.htm | 178080 | 2016-04-28 08:27:26 |
| R18.htm | 73803 | 2016-04-28 08:27:26 |
| R19.htm | 24449 | 2016-04-28 08:27:26 |
| R2.htm | 88810 | 2016-04-28 08:27:26 |
| R20.htm | 251164 | 2016-04-28 08:27:26 |
| R21.htm | 675663 | 2016-04-28 08:27:26 |
| R22.htm | 45974 | 2016-04-28 08:27:26 |
| R23.htm | 35827 | 2016-04-28 08:27:26 |
| R24.htm | 45515 | 2016-04-28 08:27:26 |
| R25.htm | 12720 | 2016-04-28 08:27:26 |
| R26.htm | 164684 | 2016-04-28 08:27:26 |
| R27.htm | 23570 | 2016-04-28 08:27:26 |
| R28.htm | 34848 | 2016-04-28 08:27:26 |
| R29.htm | 15081 | 2016-04-28 08:27:26 |
| R3.htm | 24102 | 2016-04-28 08:27:26 |
| R30.htm | 63655 | 2016-04-28 08:27:26 |
| R31.htm | 9007 | 2016-04-28 08:27:26 |
| R32.htm | 47809 | 2016-04-28 08:27:26 |
| R33.htm | 20966 | 2016-04-28 08:27:26 |
| R34.htm | 7257 | 2016-04-28 08:27:26 |
| R35.htm | 22772 | 2016-04-28 08:27:26 |
| R36.htm | 23189 | 2016-04-28 08:27:26 |
| R37.htm | 8918 | 2016-04-28 08:27:26 |
| R38.htm | 4864 | 2016-04-28 08:27:26 |
| R39.htm | 47492 | 2016-04-28 08:27:26 |
| R4.htm | 93539 | 2016-04-28 08:27:26 |
| R40.htm | 41727 | 2016-04-28 08:27:26 |
| R41.htm | 58890 | 2016-04-28 08:27:26 |
| R42.htm | 53236 | 2016-04-28 08:27:26 |
| R43.htm | 36811 | 2016-04-28 08:27:26 |
| R44.htm | 28486 | 2016-04-28 08:27:26 |
| R45.htm | 26608 | 2016-04-28 08:27:26 |
| R46.htm | 6631 | 2016-04-28 08:27:26 |
| R47.htm | 26739 | 2016-04-28 08:27:26 |
| R48.htm | 16274 | 2016-04-28 08:27:26 |
| R49.htm | 42995 | 2016-04-28 08:27:26 |
| R5.htm | 38525 | 2016-04-28 08:27:26 |
| R50.htm | 27006 | 2016-04-28 08:27:26 |
| R51.htm | 8411 | 2016-04-28 08:27:26 |
| R52.htm | 13755 | 2016-04-28 08:27:26 |
| R53.htm | 69988 | 2016-04-28 08:27:26 |
| R54.htm | 7024 | 2016-04-28 08:27:26 |
| R55.htm | 73668 | 2016-04-28 08:27:26 |
| R56.htm | 5988 | 2016-04-28 08:27:26 |
| R6.htm | 39523 | 2016-04-28 08:27:26 |
| R7.htm | 2988 | 2016-04-28 08:27:26 |
| R8.htm | 100498 | 2016-04-28 08:27:26 |
| R9.htm | 17424 | 2016-04-28 08:27:26 |
| report.css | 2767 | 2016-04-28 08:27:26 |
| Show.js | 1410 | 2016-04-28 08:27:26 |
| wtba-20160331.xml | 3509791 | 2016-04-28 08:27:26 |
| wtba-20160331.xsd | 40994 | 2016-04-28 08:27:26 |
| wtba-20160331x10q.htm | 2348279 | 2016-04-28 08:27:26 |
| wtba-20160331xex311.htm | 13105 | 2016-04-28 08:27:26 |
| wtba-20160331xex312.htm | 13068 | 2016-04-28 08:27:26 |
| wtba-20160331xex321.htm | 3917 | 2016-04-28 08:27:26 |
| wtba-20160331xex322.htm | 4266 | 2016-04-28 08:27:26 |
| wtba-20160331_cal.xml | 131382 | 2016-04-28 08:27:26 |
| wtba-20160331_def.xml | 347640 | 2016-04-28 08:27:26 |
| wtba-20160331_lab.xml | 680008 | 2016-04-28 08:27:26 |
| wtba-20160331_pre.xml | 453229 | 2016-04-28 08:27:26 |