Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000011544-12-000021-index-headers.html | 2012-02-28 14:57:21 | |
| 0000011544-12-000021-index.html | 2012-02-28 14:57:21 | |
| 0000011544-12-000021.txt | 2012-02-28 14:57:21 | |
 0000011544-12-000021-xbrl.zip | 457017 | 2012-02-28 14:57:21 |
| FilingSummary.xml | 64782 | 2012-02-28 14:57:21 |
| Financial_Report.xls | 4187839 | 2012-02-28 14:57:21 |
| R1.htm | 37233 | 2012-02-28 14:57:21 |
| R10.htm | 154284 | 2012-02-28 14:57:21 |
| R100.htm | 24587 | 2012-02-28 14:57:21 |
| R101.htm | 13279 | 2012-02-28 14:57:21 |
| R102.htm | 36337 | 2012-02-28 14:57:21 |
| R103.htm | 23393 | 2012-02-28 14:57:21 |
| R104.htm | 16001 | 2012-02-28 14:57:21 |
| R105.htm | 19466 | 2012-02-28 14:57:21 |
| R106.htm | 37116 | 2012-02-28 14:57:21 |
| R107.htm | 24503 | 2012-02-28 14:57:21 |
| R108.htm | 10250 | 2012-02-28 14:57:21 |
| R109.htm | 75112 | 2012-02-28 14:57:21 |
| R11.htm | 44953 | 2012-02-28 14:57:21 |
| R110.htm | 10636 | 2012-02-28 14:57:21 |
| R111.htm | 26548 | 2012-02-28 14:57:21 |
| R112.htm | 33501 | 2012-02-28 14:57:21 |
| R113.htm | 121973 | 2012-02-28 14:57:21 |
| R114.htm | 64565 | 2012-02-28 14:57:21 |
| R115.htm | 140860 | 2012-02-28 14:57:21 |
| R116.htm | 58474 | 2012-02-28 14:57:21 |
| R117.htm | 33669 | 2012-02-28 14:57:21 |
| R118.htm | 22598 | 2012-02-28 14:57:21 |
| R119.htm | 38508 | 2012-02-28 14:57:21 |
| R12.htm | 8146 | 2012-02-28 14:57:21 |
| R13.htm | 32334 | 2012-02-28 14:57:21 |
| R14.htm | 34995 | 2012-02-28 14:57:21 |
| R15.htm | 16785 | 2012-02-28 14:57:21 |
| R16.htm | 38462 | 2012-02-28 14:57:21 |
| R17.htm | 65074 | 2012-02-28 14:57:21 |
| R18.htm | 157225 | 2012-02-28 14:57:21 |
| R19.htm | 300120 | 2012-02-28 14:57:21 |
| R2.htm | 109031 | 2012-02-28 14:57:21 |
| R20.htm | 58973 | 2012-02-28 14:57:21 |
| R21.htm | 58453 | 2012-02-28 14:57:21 |
| R22.htm | 40994 | 2012-02-28 14:57:21 |
| R23.htm | 7062 | 2012-02-28 14:57:21 |
| R24.htm | 97698 | 2012-02-28 14:57:21 |
| R25.htm | 16304 | 2012-02-28 14:57:21 |
| R26.htm | 33875 | 2012-02-28 14:57:21 |
| R27.htm | 56208 | 2012-02-28 14:57:21 |
| R28.htm | 10976 | 2012-02-28 14:57:21 |
| R29.htm | 9452 | 2012-02-28 14:57:21 |
| R3.htm | 163637 | 2012-02-28 14:57:21 |
| R30.htm | 80056 | 2012-02-28 14:57:21 |
| R31.htm | 24528 | 2012-02-28 14:57:21 |
| R32.htm | 64521 | 2012-02-28 14:57:21 |
| R33.htm | 23404 | 2012-02-28 14:57:21 |
| R34.htm | 245129 | 2012-02-28 14:57:21 |
| R35.htm | 47023 | 2012-02-28 14:57:21 |
| R36.htm | 184920 | 2012-02-28 14:57:21 |
| R37.htm | 185756 | 2012-02-28 14:57:21 |
| R38.htm | 96831 | 2012-02-28 14:57:21 |
| R39.htm | 70129 | 2012-02-28 14:57:21 |
| R4.htm | 34404 | 2012-02-28 14:57:21 |
| R40.htm | 36257 | 2012-02-28 14:57:21 |
| R41.htm | 107063 | 2012-02-28 14:57:21 |
| R42.htm | 15939 | 2012-02-28 14:57:21 |
| R43.htm | 153226 | 2012-02-28 14:57:21 |
| R44.htm | 44788 | 2012-02-28 14:57:21 |
| R45.htm | 29459 | 2012-02-28 14:57:21 |
| R46.htm | 33097 | 2012-02-28 14:57:21 |
| R47.htm | 30773 | 2012-02-28 14:57:21 |
| R48.htm | 62857 | 2012-02-28 14:57:21 |
| R49.htm | 158870 | 2012-02-28 14:57:21 |
| R5.htm | 98167 | 2012-02-28 14:57:21 |
| R50.htm | 294518 | 2012-02-28 14:57:21 |
| R51.htm | 48403 | 2012-02-28 14:57:21 |
| R52.htm | 56834 | 2012-02-28 14:57:21 |
| R53.htm | 41060 | 2012-02-28 14:57:21 |
| R54.htm | 89807 | 2012-02-28 14:57:21 |
| R55.htm | 17585 | 2012-02-28 14:57:21 |
| R56.htm | 32406 | 2012-02-28 14:57:21 |
| R57.htm | 47082 | 2012-02-28 14:57:21 |
| R58.htm | 85145 | 2012-02-28 14:57:21 |
| R59.htm | 19031 | 2012-02-28 14:57:21 |
| R6.htm | 52287 | 2012-02-28 14:57:21 |
| R60.htm | 63898 | 2012-02-28 14:57:21 |
| R61.htm | 23965 | 2012-02-28 14:57:21 |
| R62.htm | 239425 | 2012-02-28 14:57:21 |
| R63.htm | 44470 | 2012-02-28 14:57:21 |
| R64.htm | 31476 | 2012-02-28 14:57:21 |
| R65.htm | 35874 | 2012-02-28 14:57:21 |
| R66.htm | 88496 | 2012-02-28 14:57:21 |
| R67.htm | 30967 | 2012-02-28 14:57:21 |
| R68.htm | 24174 | 2012-02-28 14:57:21 |
| R69.htm | 21534 | 2012-02-28 14:57:21 |
| R7.htm | 154907 | 2012-02-28 14:57:21 |
| R70.htm | 22040 | 2012-02-28 14:57:21 |
| R71.htm | 14487 | 2012-02-28 14:57:21 |
| R72.htm | 20426 | 2012-02-28 14:57:21 |
| R73.htm | 21760 | 2012-02-28 14:57:21 |
| R74.htm | 39925 | 2012-02-28 14:57:21 |
| R75.htm | 33577 | 2012-02-28 14:57:21 |
| R76.htm | 25424 | 2012-02-28 14:57:21 |
| R77.htm | 21717 | 2012-02-28 14:57:21 |
| R78.htm | 40173 | 2012-02-28 14:57:21 |
| R79.htm | 16900 | 2012-02-28 14:57:21 |
| R8.htm | 44201 | 2012-02-28 14:57:21 |
| R80.htm | 14383 | 2012-02-28 14:57:21 |
| R81.htm | 45479 | 2012-02-28 14:57:21 |
| R82.htm | 57533 | 2012-02-28 14:57:21 |
| R83.htm | 33368 | 2012-02-28 14:57:21 |
| R84.htm | 60564 | 2012-02-28 14:57:21 |
| R85.htm | 32429 | 2012-02-28 14:57:21 |
| R86.htm | 24216 | 2012-02-28 14:57:21 |
| R87.htm | 39187 | 2012-02-28 14:57:21 |
| R88.htm | 15297 | 2012-02-28 14:57:21 |
| R89.htm | 50643 | 2012-02-28 14:57:21 |
| R9.htm | 21348 | 2012-02-28 14:57:21 |
| R90.htm | 34423 | 2012-02-28 14:57:21 |
| R91.htm | 71928 | 2012-02-28 14:57:21 |
| R92.htm | 13586 | 2012-02-28 14:57:21 |
| R93.htm | 13139 | 2012-02-28 14:57:21 |
| R94.htm | 15956 | 2012-02-28 14:57:21 |
| R95.htm | 77707 | 2012-02-28 14:57:21 |
| R96.htm | 26667 | 2012-02-28 14:57:21 |
| R97.htm | 5027 | 2012-02-28 14:57:21 |
| R98.htm | 29120 | 2012-02-28 14:57:21 |
| R99.htm | 23352 | 2012-02-28 14:57:21 |
| report.css | 2721 | 2012-02-28 14:57:21 |
| Show.js | 6423 | 2012-02-28 14:57:21 |
| wrb-20111231.xml | 5207594 | 2012-02-28 14:57:21 |
| wrb-20111231.xsd | 121813 | 2012-02-28 14:57:21 |
| wrb-20111231_cal.xml | 203300 | 2012-02-28 14:57:21 |
| wrb-20111231_def.xml | 474744 | 2012-02-28 14:57:21 |
| wrb-20111231_lab.xml | 1261325 | 2012-02-28 14:57:21 |
| wrb-20111231_pre.xml | 737688 | 2012-02-28 14:57:21 |
| wrb1231201110k.htm | 4565767 | 2012-02-28 14:57:21 |
| wrb12312011ex10-12ltip.htm | 44630 | 2012-02-28 14:57:21 |
| wrb12312011ex10-14serp.htm | 62224 | 2012-02-28 14:57:21 |
| wrb12312011ex23.htm | 3818 | 2012-02-28 14:57:21 |
| wrb12312011ex311.htm | 8799 | 2012-02-28 14:57:21 |
| wrb12312011ex312.htm | 8977 | 2012-02-28 14:57:21 |
| wrb12312011ex321.htm | 6890 | 2012-02-28 14:57:21 |