Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000768835-15-000047-index-headers.html | 2015-06-10 16:05:00 | |
| 0000768835-15-000047-index.html | 2015-06-10 16:05:00 | |
| 0000768835-15-000047.txt | 2015-06-10 16:05:00 | |
 0000768835-15-000047-xbrl.zip | 161503 | 2015-06-10 16:05:00 |
| big-20150502.xml | 748120 | 2015-06-10 16:05:00 |
| big-20150502.xsd | 31963 | 2015-06-10 16:05:00 |
| big-20150502_cal.xml | 77763 | 2015-06-10 16:05:00 |
| big-20150502_def.xml | 274643 | 2015-06-10 16:05:00 |
| big-20150502_lab.xml | 643765 | 2015-06-10 16:05:00 |
| big-20150502_pre.xml | 351716 | 2015-06-10 16:05:00 |
| big-201552x10q.htm | 724126 | 2015-06-10 16:05:00 |
| big-201552xex311.htm | 14401 | 2015-06-10 16:05:00 |
| big-201552xex312.htm | 14553 | 2015-06-10 16:05:00 |
| big-201552xex321.htm | 6986 | 2015-06-10 16:05:00 |
| big-201552xex322.htm | 7022 | 2015-06-10 16:05:00 |
| FilingSummary.xml | 21876 | 2015-06-10 16:05:00 |
| Financial_Report.xls | 625029 | 2015-06-10 16:05:00 |
| Financial_Report.xlsx | 110845 | 2015-06-10 16:05:00 |
| R1.htm | 34623 | 2015-06-10 16:05:00 |
| R10.htm | 28405 | 2015-06-10 16:05:00 |
| R11.htm | 50630 | 2015-06-10 16:05:00 |
| R12.htm | 25786 | 2015-06-10 16:05:00 |
| R13.htm | 8269 | 2015-06-10 16:05:00 |
| R14.htm | 19392 | 2015-06-10 16:05:00 |
| R15.htm | 28712 | 2015-06-10 16:05:00 |
| R16.htm | 45638 | 2015-06-10 16:05:00 |
| R17.htm | 33787 | 2015-06-10 16:05:00 |
| R18.htm | 46322 | 2015-06-10 16:05:00 |
| R19.htm | 6318 | 2015-06-10 16:05:00 |
| R2.htm | 103059 | 2015-06-10 16:05:00 |
| R20.htm | 33645 | 2015-06-10 16:05:00 |
| R21.htm | 30377 | 2015-06-10 16:05:00 |
| R22.htm | 17678 | 2015-06-10 16:05:00 |
| R23.htm | 44118 | 2015-06-10 16:05:00 |
| R24.htm | 25883 | 2015-06-10 16:05:00 |
| R25.htm | 21201 | 2015-06-10 16:05:00 |
| R26.htm | 41421 | 2015-06-10 16:05:00 |
| R27.htm | 32077 | 2015-06-10 16:05:00 |
| R28.htm | 43577 | 2015-06-10 16:05:00 |
| R29.htm | 20382 | 2015-06-10 16:05:00 |
| R3.htm | 40074 | 2015-06-10 16:05:00 |
| R30.htm | 37490 | 2015-06-10 16:05:00 |
| R31.htm | 28734 | 2015-06-10 16:05:00 |
| R32.htm | 8188 | 2015-06-10 16:05:00 |
| R33.htm | 18991 | 2015-06-10 16:05:00 |
| R34.htm | 17583 | 2015-06-10 16:05:00 |
| R35.htm | 12700 | 2015-06-10 16:05:00 |
| R36.htm | 161384 | 2015-06-10 16:05:00 |
| R37.htm | 42519 | 2015-06-10 16:05:00 |
| R38.htm | 6144 | 2015-06-10 16:05:00 |
| R39.htm | 5729 | 2015-06-10 16:05:00 |
| R4.htm | 144370 | 2015-06-10 16:05:00 |
| R40.htm | 28291 | 2015-06-10 16:05:00 |
| R41.htm | 63231 | 2015-06-10 16:05:00 |
| R42.htm | 51915 | 2015-06-10 16:05:00 |
| R43.htm | 81403 | 2015-06-10 16:05:00 |
| R5.htm | 162306 | 2015-06-10 16:05:00 |
| R6.htm | 117606 | 2015-06-10 16:05:00 |
| R7.htm | 45255 | 2015-06-10 16:05:00 |
| R8.htm | 10553 | 2015-06-10 16:05:00 |
| R9.htm | 11484 | 2015-06-10 16:05:00 |
| report.css | 2740 | 2015-06-10 16:05:00 |
| Show.js | 1410 | 2015-06-10 16:05:00 |