Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000011544-15-000032-index-headers.html | 2015-05-04 11:29:46 | |
| 0000011544-15-000032-index.html | 2015-05-04 11:29:46 | |
| 0000011544-15-000032.txt | 2015-05-04 11:29:46 | |
 0000011544-15-000032-xbrl.zip | 253054 | 2015-05-04 11:29:46 |
| FilingSummary.xml | 39348 | 2015-05-04 11:29:46 |
| Financial_Report.xls | 2728994 | 2015-05-04 11:29:46 |
| Financial_Report.xlsx | 289859 | 2015-05-04 11:29:46 |
| R1.htm | 27401 | 2015-05-04 11:29:46 |
| R10.htm | 9540 | 2015-05-04 11:29:46 |
| R11.htm | 21630 | 2015-05-04 11:29:46 |
| R12.htm | 121859 | 2015-05-04 11:29:46 |
| R13.htm | 7836 | 2015-05-04 11:29:46 |
| R14.htm | 144209 | 2015-05-04 11:29:46 |
| R15.htm | 46739 | 2015-05-04 11:29:46 |
| R16.htm | 7070 | 2015-05-04 11:29:46 |
| R17.htm | 22690 | 2015-05-04 11:29:46 |
| R18.htm | 31787 | 2015-05-04 11:29:46 |
| R19.htm | 19031 | 2015-05-04 11:29:46 |
| R2.htm | 151196 | 2015-05-04 11:29:46 |
| R20.htm | 41676 | 2015-05-04 11:29:46 |
| R21.htm | 42327 | 2015-05-04 11:29:46 |
| R22.htm | 132274 | 2015-05-04 11:29:46 |
| R23.htm | 333691 | 2015-05-04 11:29:46 |
| R24.htm | 35310 | 2015-05-04 11:29:46 |
| R25.htm | 333723 | 2015-05-04 11:29:46 |
| R26.htm | 15520 | 2015-05-04 11:29:46 |
| R27.htm | 8111 | 2015-05-04 11:29:46 |
| R28.htm | 135788 | 2015-05-04 11:29:46 |
| R29.htm | 11957 | 2015-05-04 11:29:46 |
| R3.htm | 33628 | 2015-05-04 11:29:46 |
| R30.htm | 16105 | 2015-05-04 11:29:46 |
| R31.htm | 118940 | 2015-05-04 11:29:46 |
| R32.htm | 147056 | 2015-05-04 11:29:46 |
| R33.htm | 46516 | 2015-05-04 11:29:46 |
| R34.htm | 24127 | 2015-05-04 11:29:46 |
| R35.htm | 29063 | 2015-05-04 11:29:46 |
| R36.htm | 14607 | 2015-05-04 11:29:46 |
| R37.htm | 37079 | 2015-05-04 11:29:46 |
| R38.htm | 42161 | 2015-05-04 11:29:46 |
| R39.htm | 130931 | 2015-05-04 11:29:46 |
| R4.htm | 81459 | 2015-05-04 11:29:46 |
| R40.htm | 286666 | 2015-05-04 11:29:46 |
| R41.htm | 31478 | 2015-05-04 11:29:46 |
| R42.htm | 48911 | 2015-05-04 11:29:46 |
| R43.htm | 12728 | 2015-05-04 11:29:46 |
| R44.htm | 130090 | 2015-05-04 11:29:46 |
| R45.htm | 6661 | 2015-05-04 11:29:46 |
| R46.htm | 10577 | 2015-05-04 11:29:46 |
| R47.htm | 54354 | 2015-05-04 11:29:46 |
| R48.htm | 6170 | 2015-05-04 11:29:46 |
| R49.htm | 156261 | 2015-05-04 11:29:46 |
| R5.htm | 34098 | 2015-05-04 11:29:46 |
| R50.htm | 9265 | 2015-05-04 11:29:46 |
| R51.htm | 145614 | 2015-05-04 11:29:46 |
| R52.htm | 35131 | 2015-05-04 11:29:46 |
| R53.htm | 29456 | 2015-05-04 11:29:46 |
| R54.htm | 6856 | 2015-05-04 11:29:46 |
| R55.htm | 30301 | 2015-05-04 11:29:46 |
| R56.htm | 39900 | 2015-05-04 11:29:46 |
| R57.htm | 15138 | 2015-05-04 11:29:46 |
| R58.htm | 28872 | 2015-05-04 11:29:46 |
| R59.htm | 40176 | 2015-05-04 11:29:46 |
| R6.htm | 93876 | 2015-05-04 11:29:46 |
| R60.htm | 34095 | 2015-05-04 11:29:46 |
| R61.htm | 30514 | 2015-05-04 11:29:46 |
| R62.htm | 125745 | 2015-05-04 11:29:46 |
| R63.htm | 58501 | 2015-05-04 11:29:46 |
| R64.htm | 37647 | 2015-05-04 11:29:46 |
| R65.htm | 138389 | 2015-05-04 11:29:46 |
| R66.htm | 136719 | 2015-05-04 11:29:46 |
| R67.htm | 44713 | 2015-05-04 11:29:46 |
| R68.htm | 62383 | 2015-05-04 11:29:46 |
| R69.htm | 18967 | 2015-05-04 11:29:46 |
| R7.htm | 135348 | 2015-05-04 11:29:46 |
| R70.htm | 81318 | 2015-05-04 11:29:46 |
| R71.htm | 20242 | 2015-05-04 11:29:46 |
| R72.htm | 43277 | 2015-05-04 11:29:46 |
| R8.htm | 11393 | 2015-05-04 11:29:46 |
| R9.htm | 13830 | 2015-05-04 11:29:46 |
| report.css | 2740 | 2015-05-04 11:29:46 |
| Show.js | 1410 | 2015-05-04 11:29:46 |
| wrb-20150331.xml | 2971437 | 2015-05-04 11:29:46 |
| wrb-20150331.xsd | 64043 | 2015-05-04 11:29:46 |
| wrb-20150331_cal.xml | 114130 | 2015-05-04 11:29:46 |
| wrb-20150331_def.xml | 317225 | 2015-05-04 11:29:46 |
| wrb-20150331_lab.xml | 745057 | 2015-05-04 11:29:46 |
| wrb-20150331_pre.xml | 455296 | 2015-05-04 11:29:46 |
| wrb331201510q.htm | 1596522 | 2015-05-04 11:29:46 |
| wrb3312015ex101.htm | 52753 | 2015-05-04 11:29:46 |
| wrb3312015ex311.htm | 8540 | 2015-05-04 11:29:46 |
| wrb3312015ex312.htm | 8697 | 2015-05-04 11:29:46 |
| wrb3312015ex321.htm | 6796 | 2015-05-04 11:29:46 |