Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001140361-21-031052-index-headers.html | 2021-09-13 12:27:44 | |
| 0001140361-21-031052-index.html | 2021-09-13 12:27:44 | |
| 0001140361-21-031052.txt | 2021-09-13 12:27:44 | |
 0001140361-21-031052-xbrl.zip | 438094 | 2021-09-13 12:27:44 |
| brhc10028843_10k.htm | 3716972 | 2021-09-13 12:27:44 |
| brhc10028843_ex21.htm | 4929 | 2021-09-13 12:27:44 |
| brhc10028843_ex23.htm | 1772 | 2021-09-13 12:27:44 |
| brhc10028843_ex31-1.htm | 8537 | 2021-09-13 12:27:44 |
| brhc10028843_ex31-2.htm | 8844 | 2021-09-13 12:27:44 |
| brhc10028843_ex32-1.htm | 4726 | 2021-09-13 12:27:44 |
| brhc10028843_ex32-2.htm | 4973 | 2021-09-13 12:27:44 |
| FilingSummary.xml | 57779 | 2021-09-13 12:27:44 |
| Financial_Report.xlsx | 172409 | 2021-09-13 12:27:44 |
| gcbc-20210630.xml | 4978361 | 2021-09-13 12:27:44 |
| gcbc-20210630.xsd | 90804 | 2021-09-13 12:27:44 |
| gcbc-20210630_cal.xml | 188167 | 2021-09-13 12:27:44 |
| gcbc-20210630_def.xml | 509922 | 2021-09-13 12:27:44 |
| gcbc-20210630_lab.xml | 1470190 | 2021-09-13 12:27:44 |
| gcbc-20210630_pre.xml | 852774 | 2021-09-13 12:27:44 |
 image00001.jpg | 4175 | 2021-09-13 12:27:44 |
| R1.htm | 38869 | 2021-09-13 12:27:44 |
| R10.htm | 322822 | 2021-09-13 12:27:44 |
| R11.htm | 599682 | 2021-09-13 12:27:44 |
| R12.htm | 15859 | 2021-09-13 12:27:44 |
| R13.htm | 41465 | 2021-09-13 12:27:44 |
| R14.htm | 14558 | 2021-09-13 12:27:44 |
| R15.htm | 32242 | 2021-09-13 12:27:44 |
| R16.htm | 100052 | 2021-09-13 12:27:44 |
| R17.htm | 21509 | 2021-09-13 12:27:44 |
| R18.htm | 18844 | 2021-09-13 12:27:44 |
| R19.htm | 57874 | 2021-09-13 12:27:44 |
| R2.htm | 102761 | 2021-09-13 12:27:44 |
| R20.htm | 18084 | 2021-09-13 12:27:44 |
| R21.htm | 39412 | 2021-09-13 12:27:44 |
| R22.htm | 5462 | 2021-09-13 12:27:44 |
| R23.htm | 228250 | 2021-09-13 12:27:44 |
| R24.htm | 168144 | 2021-09-13 12:27:44 |
| R25.htm | 94039 | 2021-09-13 12:27:44 |
| R26.htm | 5640 | 2021-09-13 12:27:44 |
| R27.htm | 114289 | 2021-09-13 12:27:44 |
| R28.htm | 321260 | 2021-09-13 12:27:44 |
| R29.htm | 591150 | 2021-09-13 12:27:44 |
| R3.htm | 21509 | 2021-09-13 12:27:44 |
| R30.htm | 15258 | 2021-09-13 12:27:44 |
| R31.htm | 42348 | 2021-09-13 12:27:44 |
| R32.htm | 31570 | 2021-09-13 12:27:44 |
| R33.htm | 101516 | 2021-09-13 12:27:44 |
| R34.htm | 18938 | 2021-09-13 12:27:44 |
| R35.htm | 17599 | 2021-09-13 12:27:44 |
| R36.htm | 56845 | 2021-09-13 12:27:44 |
| R37.htm | 12747 | 2021-09-13 12:27:44 |
| R38.htm | 40683 | 2021-09-13 12:27:44 |
| R39.htm | 223648 | 2021-09-13 12:27:44 |
| R4.htm | 106351 | 2021-09-13 12:27:44 |
| R40.htm | 162322 | 2021-09-13 12:27:44 |
| R41.htm | 96206 | 2021-09-13 12:27:44 |
| R42.htm | 36943 | 2021-09-13 12:27:44 |
| R43.htm | 5948 | 2021-09-13 12:27:44 |
| R44.htm | 69014 | 2021-09-13 12:27:44 |
| R45.htm | 122792 | 2021-09-13 12:27:44 |
| R46.htm | 93384 | 2021-09-13 12:27:44 |
| R47.htm | 39493 | 2021-09-13 12:27:44 |
| R48.htm | 11096 | 2021-09-13 12:27:44 |
| R49.htm | 6224 | 2021-09-13 12:27:44 |
| R5.htm | 47829 | 2021-09-13 12:27:44 |
| R50.htm | 75714 | 2021-09-13 12:27:44 |
| R51.htm | 35252 | 2021-09-13 12:27:44 |
| R52.htm | 20997 | 2021-09-13 12:27:44 |
| R53.htm | 112523 | 2021-09-13 12:27:44 |
| R54.htm | 6613 | 2021-09-13 12:27:44 |
| R55.htm | 82732 | 2021-09-13 12:27:44 |
| R56.htm | 84422 | 2021-09-13 12:27:44 |
| R57.htm | 6668 | 2021-09-13 12:27:44 |
| R58.htm | 16749 | 2021-09-13 12:27:44 |
| R59.htm | 16569 | 2021-09-13 12:27:44 |
| R6.htm | 31475 | 2021-09-13 12:27:44 |
| R60.htm | 35611 | 2021-09-13 12:27:44 |
| R61.htm | 14640 | 2021-09-13 12:27:44 |
| R62.htm | 49295 | 2021-09-13 12:27:44 |
| R63.htm | 24712 | 2021-09-13 12:27:44 |
| R64.htm | 25370 | 2021-09-13 12:27:44 |
| R65.htm | 14510 | 2021-09-13 12:27:44 |
| R66.htm | 17894 | 2021-09-13 12:27:44 |
| R67.htm | 19053 | 2021-09-13 12:27:44 |
| R68.htm | 10780 | 2021-09-13 12:27:44 |
| R69.htm | 9894 | 2021-09-13 12:27:44 |
| R7.htm | 115627 | 2021-09-13 12:27:44 |
| R70.htm | 14568 | 2021-09-13 12:27:44 |
| R71.htm | 29453 | 2021-09-13 12:27:44 |
| R72.htm | 14296 | 2021-09-13 12:27:44 |
| R73.htm | 13254 | 2021-09-13 12:27:44 |
| R74.htm | 12057 | 2021-09-13 12:27:44 |
| R75.htm | 21234 | 2021-09-13 12:27:44 |
| R76.htm | 29089 | 2021-09-13 12:27:44 |
| R77.htm | 36807 | 2021-09-13 12:27:44 |
| R78.htm | 18032 | 2021-09-13 12:27:44 |
| R79.htm | 16531 | 2021-09-13 12:27:44 |
| R8.htm | 61670 | 2021-09-13 12:27:44 |
| R80.htm | 27896 | 2021-09-13 12:27:44 |
| R81.htm | 12260 | 2021-09-13 12:27:44 |
| R82.htm | 11094 | 2021-09-13 12:27:44 |
| R83.htm | 13225 | 2021-09-13 12:27:44 |
| R84.htm | 22596 | 2021-09-13 12:27:44 |
| R85.htm | 25708 | 2021-09-13 12:27:44 |
| R86.htm | 52674 | 2021-09-13 12:27:44 |
| R87.htm | 27499 | 2021-09-13 12:27:44 |
| R88.htm | 36036 | 2021-09-13 12:27:44 |
| R89.htm | 54375 | 2021-09-13 12:27:44 |
| R9.htm | 5782 | 2021-09-13 12:27:44 |
| R90.htm | 89551 | 2021-09-13 12:27:44 |
| R91.htm | 51158 | 2021-09-13 12:27:44 |
| R92.htm | 41919 | 2021-09-13 12:27:44 |
| R93.htm | 60591 | 2021-09-13 12:27:44 |
| R94.htm | 19311 | 2021-09-13 12:27:44 |
| report.css | 2768 | 2021-09-13 12:27:44 |
| Show.js | 1086 | 2021-09-13 12:27:44 |