XML 109 R95.htm IDEA: XBRL DOCUMENT
v3.10.0.1

REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue | $ 545,505 | $ 516,550 | $ 478,560 | $ 437,303 | $ 430,799 | $ 358,114 | $ 383,807 | $ 352,277 | $ 1,977,918 | $ 1,524,997 | $ 1,477,035
Consolidated property, plant and equipment, net | 713,351 |  |  |  | 437,262 |  |  |  | 713,351 | 437,262 | 434,854
United States [Member] |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue |  |  |  |  |  |  |  |  | 1,521,187 | 1,164,958 | 1,149,448
Consolidated property, plant and equipment, net | 612,294 |  |  |  | 358,795 |  |  |  | 612,294 | 358,795 | 370,332
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue |  |  |  |  |  |  |  |  | 102,814 | 67,048 | 68,604
AUSTRALIA |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue |  |  |  |  |  |  |  |  | 166,980 | 124,757 | 106,780
Consolidated property, plant and equipment, net | 33,288 |  |  |  | 35,917 |  |  |  | 33,288 | 35,917 | 26,196
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated property, plant and equipment, net | 24,892 |  |  |  | 4,144 |  |  |  | 24,892 | 4,144 | 0
MEXICO |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated property, plant and equipment, net | 7,017 |  |  |  | 0 |  |  |  | 7,017 | 0 | 0
Canada [Member] |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue |  |  |  |  |  |  |  |  | 123,341 | 106,080 | 102,333
Consolidated property, plant and equipment, net | 33,884 |  |  |  | 36,383 |  |  |  | 33,884 | 36,383 | 35,984
All other countries [Member] |  |  |  |  |  |  |  |  |  |  |
REPORTABLE SEGMENTS (Details) - Schedule of Segment Information by Geographic Region [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated revenue |  |  |  |  |  |  |  |  | 63,596 | 62,154 | 49,870
Consolidated property, plant and equipment, net | $ 1,976 |  |  |  | $ 2,023 |  |  |  | $ 1,976 | $ 2,023 | $ 2,342

X
- Definition Property plant equipment and intangible assets excluding goodwill net. + References No definition available. + Details
Name: | gff_PropertyPlantEquipmentAndIntangibleAssetsExcludingGoodwillNet
Namespace Prefix: | gff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | gff_REPORTABLESEGMENTSDetailsScheduleofSegmentInformationbyGeographicRegionLineItems
Namespace Prefix: | gff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_AU
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=gff_AllOtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |