Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000931148-22-000027-index-headers.html | 2022-02-22 16:51:06 | |
| 0000931148-22-000027-index.html | 2022-02-22 16:51:06 | |
| 0000931148-22-000027.txt | 2022-02-22 16:51:06 | |
 0000931148-22-000027-xbrl.zip | 684665 | 2022-02-22 16:51:06 |
| a1035graftech-shortterminc.htm | 52319 | 2022-02-22 16:51:06 |
| a1036formofrestrictedstock.htm | 62657 | 2022-02-22 16:51:06 |
| a1037formofstockoptiongran.htm | 63524 | 2022-02-22 16:51:06 |
| a2021-10kex231dtconsent.htm | 2369 | 2022-02-22 16:51:06 |
| a2021-10kex311.htm | 10077 | 2022-02-22 16:51:06 |
| a2021-10kex312.htm | 10097 | 2022-02-22 16:51:06 |
| a2021-10kex321.htm | 5937 | 2022-02-22 16:51:06 |
| a2021-10kex322.htm | 5845 | 2022-02-22 16:51:06 |
| a2021-ex211listofsubsidiar.htm | 20804 | 2022-02-22 16:51:06 |
| FilingSummary.xml | 78496 | 2022-02-22 16:51:06 |
| Financial_Report.xlsx | 175704 | 2022-02-22 16:51:06 |
| gti-20211231.htm | 2941831 | 2022-02-22 16:51:06 |
| gti-20211231.xsd | 83308 | 2022-02-22 16:51:06 |
| gti-20211231_cal.xml | 117258 | 2022-02-22 16:51:06 |
| gti-20211231_def.xml | 522276 | 2022-02-22 16:51:06 |
 gti-20211231_g1.jpg | 13851 | 2022-02-22 16:51:06 |
 gti-20211231_g2.jpg | 53445 | 2022-02-22 16:51:06 |
 gti-20211231_g3.jpg | 71412 | 2022-02-22 16:51:06 |
 gti-20211231_g4.jpg | 17248 | 2022-02-22 16:51:06 |
 gti-20211231_g5.jpg | 23284 | 2022-02-22 16:51:06 |
| gti-20211231_htm.xml | 2538915 | 2022-02-22 16:51:06 |
| gti-20211231_lab.xml | 1073822 | 2022-02-22 16:51:06 |
| gti-20211231_pre.xml | 852967 | 2022-02-22 16:51:06 |
| MetaLinks.json | 1164798 | 2022-02-22 16:51:06 |
| R1.htm | 63170 | 2022-02-22 16:51:06 |
| R10.htm | 59688 | 2022-02-22 16:51:06 |
| R100.htm | 9989 | 2022-02-22 16:51:06 |
| R101.htm | 57959 | 2022-02-22 16:51:06 |
| R102.htm | 28301 | 2022-02-22 16:51:06 |
| R103.htm | 16440 | 2022-02-22 16:51:06 |
| R104.htm | 12503 | 2022-02-22 16:51:06 |
| R105.htm | 21264 | 2022-02-22 16:51:06 |
| R106.htm | 30848 | 2022-02-22 16:51:06 |
| R107.htm | 47885 | 2022-02-22 16:51:06 |
| R108.htm | 10970 | 2022-02-22 16:51:06 |
| R109.htm | 13220 | 2022-02-22 16:51:06 |
| R11.htm | 39810 | 2022-02-22 16:51:06 |
| R110.htm | 12328 | 2022-02-22 16:51:06 |
| R111.htm | 48817 | 2022-02-22 16:51:06 |
| R112.htm | 10544 | 2022-02-22 16:51:06 |
| R113.htm | 7252 | 2022-02-22 16:51:06 |
| R114.htm | 12966 | 2022-02-22 16:51:06 |
| R115.htm | 9267 | 2022-02-22 16:51:06 |
| R116.htm | 10525 | 2022-02-22 16:51:06 |
| R12.htm | 53838 | 2022-02-22 16:51:06 |
| R13.htm | 32366 | 2022-02-22 16:51:06 |
| R14.htm | 27595 | 2022-02-22 16:51:06 |
| R15.htm | 24761 | 2022-02-22 16:51:06 |
| R16.htm | 18015 | 2022-02-22 16:51:06 |
| R17.htm | 85968 | 2022-02-22 16:51:06 |
| R18.htm | 48305 | 2022-02-22 16:51:06 |
| R19.htm | 41998 | 2022-02-22 16:51:06 |
| R2.htm | 7870 | 2022-02-22 16:51:06 |
| R20.htm | 184616 | 2022-02-22 16:51:06 |
| R21.htm | 24577 | 2022-02-22 16:51:06 |
| R22.htm | 105413 | 2022-02-22 16:51:06 |
| R23.htm | 21171 | 2022-02-22 16:51:06 |
| R24.htm | 13574 | 2022-02-22 16:51:06 |
| R25.htm | 18823 | 2022-02-22 16:51:06 |
| R26.htm | 5438 | 2022-02-22 16:51:06 |
| R27.htm | 117300 | 2022-02-22 16:51:06 |
| R28.htm | 13653 | 2022-02-22 16:51:06 |
| R29.htm | 35538 | 2022-02-22 16:51:06 |
| R3.htm | 112530 | 2022-02-22 16:51:06 |
| R30.htm | 47046 | 2022-02-22 16:51:06 |
| R31.htm | 30561 | 2022-02-22 16:51:06 |
| R32.htm | 18006 | 2022-02-22 16:51:06 |
| R33.htm | 23805 | 2022-02-22 16:51:06 |
| R34.htm | 15064 | 2022-02-22 16:51:06 |
| R35.htm | 74121 | 2022-02-22 16:51:06 |
| R36.htm | 50047 | 2022-02-22 16:51:06 |
| R37.htm | 44976 | 2022-02-22 16:51:06 |
| R38.htm | 181616 | 2022-02-22 16:51:06 |
| R39.htm | 11072 | 2022-02-22 16:51:06 |
| R4.htm | 20382 | 2022-02-22 16:51:06 |
| R40.htm | 104486 | 2022-02-22 16:51:06 |
| R41.htm | 11865 | 2022-02-22 16:51:06 |
| R42.htm | 11504 | 2022-02-22 16:51:06 |
| R43.htm | 16279 | 2022-02-22 16:51:06 |
| R44.htm | 13995 | 2022-02-22 16:51:06 |
| R45.htm | 5577 | 2022-02-22 16:51:06 |
| R46.htm | 22999 | 2022-02-22 16:51:06 |
| R47.htm | 7537 | 2022-02-22 16:51:06 |
| R48.htm | 5638 | 2022-02-22 16:51:06 |
| R49.htm | 14317 | 2022-02-22 16:51:06 |
| R5.htm | 93152 | 2022-02-22 16:51:06 |
| R50.htm | 16481 | 2022-02-22 16:51:06 |
| R51.htm | 14529 | 2022-02-22 16:51:06 |
| R52.htm | 14695 | 2022-02-22 16:51:06 |
| R53.htm | 26451 | 2022-02-22 16:51:06 |
| R54.htm | 19741 | 2022-02-22 16:51:06 |
| R55.htm | 15700 | 2022-02-22 16:51:06 |
| R56.htm | 7791 | 2022-02-22 16:51:06 |
| R57.htm | 19059 | 2022-02-22 16:51:06 |
| R58.htm | 44415 | 2022-02-22 16:51:06 |
| R59.htm | 44001 | 2022-02-22 16:51:06 |
| R6.htm | 8035 | 2022-02-22 16:51:06 |
| R60.htm | 19122 | 2022-02-22 16:51:06 |
| R61.htm | 45976 | 2022-02-22 16:51:06 |
| R62.htm | 20249 | 2022-02-22 16:51:06 |
| R63.htm | 24811 | 2022-02-22 16:51:06 |
| R64.htm | 9114 | 2022-02-22 16:51:06 |
| R65.htm | 16817 | 2022-02-22 16:51:06 |
| R66.htm | 20012 | 2022-02-22 16:51:06 |
| R67.htm | 25838 | 2022-02-22 16:51:06 |
| R68.htm | 34630 | 2022-02-22 16:51:06 |
| R69.htm | 27348 | 2022-02-22 16:51:06 |
| R7.htm | 102621 | 2022-02-22 16:51:06 |
| R70.htm | 23086 | 2022-02-22 16:51:06 |
| R71.htm | 16916 | 2022-02-22 16:51:06 |
| R72.htm | 17455 | 2022-02-22 16:51:06 |
| R73.htm | 14026 | 2022-02-22 16:51:06 |
| R74.htm | 26676 | 2022-02-22 16:51:06 |
| R75.htm | 18468 | 2022-02-22 16:51:06 |
| R76.htm | 14994 | 2022-02-22 16:51:06 |
| R77.htm | 22901 | 2022-02-22 16:51:06 |
| R78.htm | 47230 | 2022-02-22 16:51:06 |
| R79.htm | 15458 | 2022-02-22 16:51:06 |
| R8.htm | 110305 | 2022-02-22 16:51:06 |
| R80.htm | 34937 | 2022-02-22 16:51:06 |
| R81.htm | 21427 | 2022-02-22 16:51:06 |
| R82.htm | 54340 | 2022-02-22 16:51:06 |
| R83.htm | 4624 | 2022-02-22 16:51:06 |
| R84.htm | 13069 | 2022-02-22 16:51:06 |
| R85.htm | 6149 | 2022-02-22 16:51:06 |
| R86.htm | 11436 | 2022-02-22 16:51:06 |
| R87.htm | 7207 | 2022-02-22 16:51:06 |
| R88.htm | 21111 | 2022-02-22 16:51:06 |
| R89.htm | 18962 | 2022-02-22 16:51:06 |
| R9.htm | 13621 | 2022-02-22 16:51:06 |
| R90.htm | 35584 | 2022-02-22 16:51:06 |
| R91.htm | 24444 | 2022-02-22 16:51:06 |
| R92.htm | 67434 | 2022-02-22 16:51:06 |
| R93.htm | 43623 | 2022-02-22 16:51:06 |
| R94.htm | 12807 | 2022-02-22 16:51:06 |
| R95.htm | 15519 | 2022-02-22 16:51:06 |
| R96.htm | 13867 | 2022-02-22 16:51:06 |
| R97.htm | 12231 | 2022-02-22 16:51:06 |
| R98.htm | 11870 | 2022-02-22 16:51:06 |
| R99.htm | 23960 | 2022-02-22 16:51:06 |
| report.css | 2768 | 2022-02-22 16:51:06 |
| Show.js | 1086 | 2022-02-22 16:51:06 |