XML 117 R88.htm IDEA: XBRL DOCUMENT
v3.3.0.814

STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices [Line Items] |  |
Options Outstanding & Exercisable Shares (in Shares) | 425,450 | 582,485
Options Outstanding & Exercisable Weighted Average Exercise Price (in Dollars per Share) | $ 20.86 | $ 20.23
Options Outstanding & Exercisable Weighted Average Contractual Term (Years) | 2 years 7 months 18 days |
Options Outstanding & Exercisable Aggregated Intrinsic Value (in Dollars) | $ 6 |
14.78 [Member] |  |
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices [Line Items] |  |
Range of Exercises Prices (in Dollars per Share) | $ 14.78 |
Options Outstanding & Exercisable Shares (in Shares) | 6,000 |
Options Outstanding & Exercisable Weighted Average Exercise Price (in Dollars per Share) | $ 14.78 |
Options Outstanding & Exercisable Weighted Average Contractual Term (Years) | 1 year 9 months |
17.23 [Member] |  |
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices [Line Items] |  |
Range of Exercises Prices (in Dollars per Share) | $ 20 |
Options Outstanding & Exercisable Shares (in Shares) | 350,000 |
Options Outstanding & Exercisable Weighted Average Exercise Price (in Dollars per Share) | $ 20.00 |
Options Outstanding & Exercisable Weighted Average Contractual Term (Years) | 3 years |
19.49 to 22.41 [Member] |  |
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices [Line Items] |  |
Range of Exercises Prices (in Dollars per Share) | $ 21.88 |
Options Outstanding & Exercisable Shares (in Shares) | 6,000 |
Options Outstanding & Exercisable Weighted Average Exercise Price (in Dollars per Share) | $ 21.88 |
Options Outstanding & Exercisable Weighted Average Contractual Term (Years) | 11 months |
26.06 [Member] |  |
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) - Stock options activity range of exercise prices [Line Items] |  |
Range of Exercises Prices (in Dollars per Share) | $ 26.06 |
Options Outstanding & Exercisable Shares (in Shares) | 63,450 |
Options Outstanding & Exercisable Weighted Average Exercise Price (in Dollars per Share) | $ 26.06 |
Options Outstanding & Exercisable Weighted Average Contractual Term (Years) | 7 months |

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

X
- Definition Share based compensation shares authorized under stock option plans exercise price range exercise price. + References No definition available. + Details
Name: | gff_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisePrice
Namespace Prefix: | gff_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | gff_StockOptionAxis=gff_StockOptionOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gff_StockOptionAxis=gff_StockOptionTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gff_StockOptionAxis=gff_StockOptionThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gff_StockOptionAxis=gff_StockOptionFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |