Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001166928-15-000077-index-headers.html | 2015-07-24 08:09:56 | |
| 0001166928-15-000077-index.html | 2015-07-24 08:09:56 | |
| 0001166928-15-000077.txt | 2015-07-24 08:09:56 | |
 0001166928-15-000077-xbrl.zip | 311593 | 2015-07-24 08:09:56 |
| FilingSummary.xml | 34903 | 2015-07-24 08:09:56 |
| Financial_Report.xlsx | 92177 | 2015-07-24 08:09:56 |
| R1.htm | 22646 | 2015-07-24 08:09:56 |
| R10.htm | 41645 | 2015-07-24 08:09:56 |
| R11.htm | 256938 | 2015-07-24 08:09:56 |
| R12.htm | 863871 | 2015-07-24 08:09:56 |
| R13.htm | 107973 | 2015-07-24 08:09:56 |
| R14.htm | 39821 | 2015-07-24 08:09:56 |
| R15.htm | 67251 | 2015-07-24 08:09:56 |
| R16.htm | 20008 | 2015-07-24 08:09:56 |
| R17.htm | 254139 | 2015-07-24 08:09:56 |
| R18.htm | 71801 | 2015-07-24 08:09:56 |
| R19.htm | 39748 | 2015-07-24 08:09:56 |
| R2.htm | 101701 | 2015-07-24 08:09:56 |
| R20.htm | 256344 | 2015-07-24 08:09:56 |
| R21.htm | 857205 | 2015-07-24 08:09:56 |
| R22.htm | 96287 | 2015-07-24 08:09:56 |
| R23.htm | 37247 | 2015-07-24 08:09:56 |
| R24.htm | 63867 | 2015-07-24 08:09:56 |
| R25.htm | 12671 | 2015-07-24 08:09:56 |
| R26.htm | 246373 | 2015-07-24 08:09:56 |
| R27.htm | 6014 | 2015-07-24 08:09:56 |
| R28.htm | 24041 | 2015-07-24 08:09:56 |
| R29.htm | 35737 | 2015-07-24 08:09:56 |
| R3.htm | 26270 | 2015-07-24 08:09:56 |
| R30.htm | 16149 | 2015-07-24 08:09:56 |
| R31.htm | 66804 | 2015-07-24 08:09:56 |
| R32.htm | 9959 | 2015-07-24 08:09:56 |
| R33.htm | 51671 | 2015-07-24 08:09:56 |
| R34.htm | 19580 | 2015-07-24 08:09:56 |
| R35.htm | 7362 | 2015-07-24 08:09:56 |
| R36.htm | 23146 | 2015-07-24 08:09:56 |
| R37.htm | 23272 | 2015-07-24 08:09:56 |
| R38.htm | 9509 | 2015-07-24 08:09:56 |
| R39.htm | 7257 | 2015-07-24 08:09:56 |
| R4.htm | 111108 | 2015-07-24 08:09:56 |
| R40.htm | 48293 | 2015-07-24 08:09:56 |
| R41.htm | 47207 | 2015-07-24 08:09:56 |
| R42.htm | 44028 | 2015-07-24 08:09:56 |
| R43.htm | 53382 | 2015-07-24 08:09:56 |
| R44.htm | 41860 | 2015-07-24 08:09:56 |
| R45.htm | 29481 | 2015-07-24 08:09:56 |
| R46.htm | 26925 | 2015-07-24 08:09:56 |
| R47.htm | 6827 | 2015-07-24 08:09:56 |
| R48.htm | 56989 | 2015-07-24 08:09:56 |
| R49.htm | 33307 | 2015-07-24 08:09:56 |
| R5.htm | 48350 | 2015-07-24 08:09:56 |
| R50.htm | 48742 | 2015-07-24 08:09:56 |
| R51.htm | 31803 | 2015-07-24 08:09:56 |
| R52.htm | 8420 | 2015-07-24 08:09:56 |
| R53.htm | 7367 | 2015-07-24 08:09:56 |
| R54.htm | 69463 | 2015-07-24 08:09:56 |
| R55.htm | 26299 | 2015-07-24 08:09:56 |
| R56.htm | 16714 | 2015-07-24 08:09:56 |
| R57.htm | 23320 | 2015-07-24 08:09:56 |
| R58.htm | 80466 | 2015-07-24 08:09:56 |
| R59.htm | 5996 | 2015-07-24 08:09:56 |
| R6.htm | 41721 | 2015-07-24 08:09:56 |
| R7.htm | 3556 | 2015-07-24 08:09:56 |
| R8.htm | 131490 | 2015-07-24 08:09:56 |
| R9.htm | 13787 | 2015-07-24 08:09:56 |
| report.css | 2767 | 2015-07-24 08:09:56 |
| Show.js | 1410 | 2015-07-24 08:09:56 |
| wtba-20150630.xml | 4471447 | 2015-07-24 08:09:56 |
| wtba-20150630.xsd | 48961 | 2015-07-24 08:09:56 |
| wtba-20150630x10q.htm | 3198845 | 2015-07-24 08:09:56 |
| wtba-20150630xex311.htm | 13086 | 2015-07-24 08:09:56 |
| wtba-20150630xex312.htm | 13049 | 2015-07-24 08:09:56 |
| wtba-20150630xex321.htm | 3909 | 2015-07-24 08:09:56 |
| wtba-20150630xex322.htm | 4235 | 2015-07-24 08:09:56 |
| wtba-20150630_cal.xml | 139470 | 2015-07-24 08:09:56 |
| wtba-20150630_def.xml | 407106 | 2015-07-24 08:09:56 |
| wtba-20150630_lab.xml | 770035 | 2015-07-24 08:09:56 |
| wtba-20150630_pre.xml | 505844 | 2015-07-24 08:09:56 |