Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000912562-17-000029-index-headers.html | 2017-07-27 13:47:07 | |
| 0000912562-17-000029-index.html | 2017-07-27 13:47:07 | |
| 0000912562-17-000029.txt | 2017-07-27 13:47:07 | |
 0000912562-17-000029-xbrl.zip | 238694 | 2017-07-27 13:47:07 |
| FilingSummary.xml | 45360 | 2017-07-27 13:47:07 |
| Financial_Report.xlsx | 89611 | 2017-07-27 13:47:07 |
 gibindcolorlogonotaga02.gif | 13063 | 2017-07-27 13:47:07 |
| q22017exhibit311.htm | 13210 | 2017-07-27 13:47:07 |
| q22017exhibit312.htm | 13288 | 2017-07-27 13:47:07 |
| q22017exhibit321.htm | 4892 | 2017-07-27 13:47:07 |
| q22017exhibit322.htm | 5023 | 2017-07-27 13:47:07 |
| R1.htm | 21945 | 2017-07-27 13:47:07 |
| R10.htm | 29921 | 2017-07-27 13:47:07 |
| R11.htm | 22277 | 2017-07-27 13:47:07 |
| R12.htm | 13518 | 2017-07-27 13:47:07 |
| R13.htm | 50845 | 2017-07-27 13:47:07 |
| R14.htm | 84113 | 2017-07-27 13:47:07 |
| R15.htm | 21790 | 2017-07-27 13:47:07 |
| R16.htm | 14889 | 2017-07-27 13:47:07 |
| R17.htm | 32280 | 2017-07-27 13:47:07 |
| R18.htm | 49218 | 2017-07-27 13:47:07 |
| R19.htm | 10758 | 2017-07-27 13:47:07 |
| R2.htm | 74341 | 2017-07-27 13:47:07 |
| R20.htm | 101232 | 2017-07-27 13:47:07 |
| R21.htm | 18677 | 2017-07-27 13:47:07 |
| R22.htm | 41864 | 2017-07-27 13:47:07 |
| R23.htm | 56802 | 2017-07-27 13:47:07 |
| R24.htm | 785923 | 2017-07-27 13:47:07 |
| R25.htm | 29605 | 2017-07-27 13:47:07 |
| R26.htm | 19281 | 2017-07-27 13:47:07 |
| R27.htm | 14421 | 2017-07-27 13:47:07 |
| R28.htm | 48899 | 2017-07-27 13:47:07 |
| R29.htm | 86946 | 2017-07-27 13:47:07 |
| R3.htm | 19732 | 2017-07-27 13:47:07 |
| R30.htm | 19306 | 2017-07-27 13:47:07 |
| R31.htm | 14418 | 2017-07-27 13:47:07 |
| R32.htm | 31532 | 2017-07-27 13:47:07 |
| R33.htm | 49231 | 2017-07-27 13:47:07 |
| R34.htm | 98094 | 2017-07-27 13:47:07 |
| R35.htm | 16968 | 2017-07-27 13:47:07 |
| R36.htm | 40645 | 2017-07-27 13:47:07 |
| R37.htm | 54685 | 2017-07-27 13:47:07 |
| R38.htm | 771634 | 2017-07-27 13:47:07 |
| R39.htm | 19088 | 2017-07-27 13:47:07 |
| R4.htm | 68557 | 2017-07-27 13:47:07 |
| R40.htm | 10749 | 2017-07-27 13:47:07 |
| R41.htm | 15866 | 2017-07-27 13:47:07 |
| R42.htm | 29225 | 2017-07-27 13:47:07 |
| R43.htm | 24890 | 2017-07-27 13:47:07 |
| R44.htm | 5069 | 2017-07-27 13:47:07 |
| R45.htm | 24114 | 2017-07-27 13:47:07 |
| R46.htm | 40000 | 2017-07-27 13:47:07 |
| R47.htm | 19275 | 2017-07-27 13:47:07 |
| R48.htm | 18410 | 2017-07-27 13:47:07 |
| R49.htm | 40579 | 2017-07-27 13:47:07 |
| R5.htm | 16852 | 2017-07-27 13:47:07 |
| R50.htm | 9503 | 2017-07-27 13:47:07 |
| R51.htm | 31731 | 2017-07-27 13:47:07 |
| R52.htm | 22541 | 2017-07-27 13:47:07 |
| R53.htm | 13332 | 2017-07-27 13:47:07 |
| R54.htm | 15944 | 2017-07-27 13:47:07 |
| R55.htm | 7546 | 2017-07-27 13:47:07 |
| R56.htm | 10163 | 2017-07-27 13:47:07 |
| R57.htm | 12150 | 2017-07-27 13:47:07 |
| R58.htm | 4225 | 2017-07-27 13:47:07 |
| R59.htm | 24172 | 2017-07-27 13:47:07 |
| R6.htm | 75409 | 2017-07-27 13:47:07 |
| R60.htm | 11113 | 2017-07-27 13:47:07 |
| R61.htm | 11211 | 2017-07-27 13:47:07 |
| R62.htm | 7705 | 2017-07-27 13:47:07 |
| R63.htm | 14842 | 2017-07-27 13:47:07 |
| R64.htm | 18408 | 2017-07-27 13:47:07 |
| R65.htm | 24909 | 2017-07-27 13:47:07 |
| R66.htm | 8590 | 2017-07-27 13:47:07 |
| R67.htm | 85017 | 2017-07-27 13:47:07 |
| R68.htm | 50963 | 2017-07-27 13:47:07 |
| R69.htm | 100179 | 2017-07-27 13:47:07 |
| R7.htm | 48096 | 2017-07-27 13:47:07 |
| R70.htm | 79731 | 2017-07-27 13:47:07 |
| R8.htm | 6827 | 2017-07-27 13:47:07 |
| R9.htm | 8150 | 2017-07-27 13:47:07 |
| report.css | 2767 | 2017-07-27 13:47:07 |
| rock-20170630.xml | 3317964 | 2017-07-27 13:47:07 |
| rock-20170630.xsd | 48491 | 2017-07-27 13:47:07 |
| rock-20170630x10q.htm | 1795489 | 2017-07-27 13:47:07 |
| rock-20170630_cal.xml | 84605 | 2017-07-27 13:47:07 |
| rock-20170630_def.xml | 268935 | 2017-07-27 13:47:07 |
| rock-20170630_lab.xml | 576214 | 2017-07-27 13:47:07 |
| rock-20170630_pre.xml | 419245 | 2017-07-27 13:47:07 |
| Show.js | 1410 | 2017-07-27 13:47:07 |