Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-15-173423-index-headers.html | 2015-05-06 09:06:14 | |
| 0001193125-15-173423-index.html | 2015-05-06 09:06:14 | |
| 0001193125-15-173423.txt | 2015-05-06 09:06:14 | |
 0001193125-15-173423-xbrl.zip | 119776 | 2015-05-06 09:06:14 |
| d919783d10q.htm | 593943 | 2015-05-06 09:06:14 |
| d919783dex102.htm | 49965 | 2015-05-06 09:06:14 |
| d919783dex103.htm | 26484 | 2015-05-06 09:06:14 |
| d919783dex104.htm | 46686 | 2015-05-06 09:06:14 |
| d919783dex311.htm | 8230 | 2015-05-06 09:06:14 |
| d919783dex312.htm | 8405 | 2015-05-06 09:06:14 |
| d919783dex320.htm | 5804 | 2015-05-06 09:06:14 |
| FilingSummary.xml | 32179 | 2015-05-06 09:06:14 |
| Financial_Report.xls | 1338334 | 2015-05-06 09:06:14 |
| Financial_Report.xlsx | 135902 | 2015-05-06 09:06:14 |
| fstr-20150331.xml | 1385686 | 2015-05-06 09:06:14 |
| fstr-20150331.xsd | 42904 | 2015-05-06 09:06:14 |
| fstr-20150331_cal.xml | 71997 | 2015-05-06 09:06:14 |
| fstr-20150331_def.xml | 137727 | 2015-05-06 09:06:14 |
| fstr-20150331_lab.xml | 335091 | 2015-05-06 09:06:14 |
| fstr-20150331_pre.xml | 317777 | 2015-05-06 09:06:14 |
| R1.htm | 36813 | 2015-05-06 09:06:14 |
| R10.htm | 119126 | 2015-05-06 09:06:14 |
| R11.htm | 141364 | 2015-05-06 09:06:14 |
| R12.htm | 8923 | 2015-05-06 09:06:14 |
| R13.htm | 29170 | 2015-05-06 09:06:14 |
| R14.htm | 40600 | 2015-05-06 09:06:14 |
| R15.htm | 7826 | 2015-05-06 09:06:14 |
| R16.htm | 37134 | 2015-05-06 09:06:14 |
| R17.htm | 43181 | 2015-05-06 09:06:14 |
| R18.htm | 38198 | 2015-05-06 09:06:14 |
| R19.htm | 65838 | 2015-05-06 09:06:14 |
| R2.htm | 128096 | 2015-05-06 09:06:14 |
| R20.htm | 39292 | 2015-05-06 09:06:14 |
| R21.htm | 8693 | 2015-05-06 09:06:14 |
| R22.htm | 6682 | 2015-05-06 09:06:14 |
| R23.htm | 16809 | 2015-05-06 09:06:14 |
| R24.htm | 8473 | 2015-05-06 09:06:14 |
| R25.htm | 6842 | 2015-05-06 09:06:14 |
| R26.htm | 7083 | 2015-05-06 09:06:14 |
| R27.htm | 86396 | 2015-05-06 09:06:14 |
| R28.htm | 105366 | 2015-05-06 09:06:14 |
| R29.htm | 141186 | 2015-05-06 09:06:14 |
| R3.htm | 20276 | 2015-05-06 09:06:14 |
| R30.htm | 26073 | 2015-05-06 09:06:14 |
| R31.htm | 39103 | 2015-05-06 09:06:14 |
| R32.htm | 27966 | 2015-05-06 09:06:14 |
| R33.htm | 41116 | 2015-05-06 09:06:14 |
| R34.htm | 29189 | 2015-05-06 09:06:14 |
| R35.htm | 66518 | 2015-05-06 09:06:14 |
| R36.htm | 29525 | 2015-05-06 09:06:14 |
| R37.htm | 8433 | 2015-05-06 09:06:14 |
| R38.htm | 22005 | 2015-05-06 09:06:14 |
| R39.htm | 30874 | 2015-05-06 09:06:14 |
| R4.htm | 67201 | 2015-05-06 09:06:14 |
| R40.htm | 23027 | 2015-05-06 09:06:14 |
| R41.htm | 57289 | 2015-05-06 09:06:14 |
| R42.htm | 17113 | 2015-05-06 09:06:14 |
| R43.htm | 73956 | 2015-05-06 09:06:14 |
| R44.htm | 50763 | 2015-05-06 09:06:14 |
| R45.htm | 26410 | 2015-05-06 09:06:14 |
| R46.htm | 13817 | 2015-05-06 09:06:14 |
| R47.htm | 69783 | 2015-05-06 09:06:14 |
| R48.htm | 24036 | 2015-05-06 09:06:14 |
| R49.htm | 6727 | 2015-05-06 09:06:14 |
| R5.htm | 27524 | 2015-05-06 09:06:14 |
| R50.htm | 22492 | 2015-05-06 09:06:14 |
| R51.htm | 57578 | 2015-05-06 09:06:14 |
| R52.htm | 18158 | 2015-05-06 09:06:14 |
| R53.htm | 23104 | 2015-05-06 09:06:14 |
| R54.htm | 6762 | 2015-05-06 09:06:14 |
| R55.htm | 55156 | 2015-05-06 09:06:14 |
| R56.htm | 20692 | 2015-05-06 09:06:14 |
| R57.htm | 43641 | 2015-05-06 09:06:14 |
| R58.htm | 52542 | 2015-05-06 09:06:14 |
| R59.htm | 48148 | 2015-05-06 09:06:14 |
| R6.htm | 6562 | 2015-05-06 09:06:14 |
| R60.htm | 32948 | 2015-05-06 09:06:14 |
| R61.htm | 36227 | 2015-05-06 09:06:14 |
| R62.htm | 17008 | 2015-05-06 09:06:14 |
| R63.htm | 19306 | 2015-05-06 09:06:14 |
| R64.htm | 15394 | 2015-05-06 09:06:14 |
| R65.htm | 16162 | 2015-05-06 09:06:14 |
| R66.htm | 10648 | 2015-05-06 09:06:14 |
| R7.htm | 138114 | 2015-05-06 09:06:14 |
| R8.htm | 15675 | 2015-05-06 09:06:14 |
| R9.htm | 90147 | 2015-05-06 09:06:14 |
| report.css | 2740 | 2015-05-06 09:06:14 |
| Show.js | 1410 | 2015-05-06 09:06:14 |