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CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 12,593us-gaap_NetIncomeLoss $ (22,589)us-gaap_NetIncomeLoss
Net cash provided by (used in) operating activities (43,051)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (26,576)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of property, plant and equipment (39,713)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (34,845)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Acquired businesses, net of cash acquired 0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired (22,781)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Intercompany distributions 0gff_IntercompanyDistributions 0gff_IntercompanyDistributions
Proceeds from sale of investments (8,891)us-gaap_PaymentsForProceedsFromInvestments 0us-gaap_PaymentsForProceedsFromInvestments
Proceeds from sale of assets 177us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 294us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Net cash used in investing activities (30,645)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (57,332)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 285us-gaap_ProceedsFromIssuanceOfCommonStock 584us-gaap_ProceedsFromIssuanceOfCommonStock
Purchase of shares for treasury (37,577)us-gaap_PaymentsForRepurchaseOfCommonStock (63,370)us-gaap_PaymentsForRepurchaseOfCommonStock
Proceeds from long-term debt 99,556us-gaap_ProceedsFromIssuanceOfLongTermDebt 644,514us-gaap_ProceedsFromIssuanceOfLongTermDebt
Payments of long-term debt (29,425)us-gaap_RepaymentsOfLongTermDebt (586,310)us-gaap_RepaymentsOfLongTermDebt
Change in short-term borrowings (572)us-gaap_ProceedsFromRepaymentsOfShortTermDebt 4,908us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Financing costs (590)us-gaap_PaymentsOfFinancingCosts (10,687)us-gaap_PaymentsOfFinancingCosts
Purchase of ESOP shares 0gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares (10,000)gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares
Tax effect from exercise/vesting of equity awards, net 345gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock 273gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
Dividend (3,911)us-gaap_PaymentsOfDividends (3,290)us-gaap_PaymentsOfDividends
Other, net 95us-gaap_ProceedsFromPaymentsForOtherFinancingActivities 144us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash provided by (used in) financing activities 28,206us-gaap_NetCashProvidedByUsedInFinancingActivities (23,234)us-gaap_NetCashProvidedByUsedInFinancingActivities
CASH FLOWS FROM DISCONTINUED OPERATIONS:    
Net cash used in discontinued operations (545)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations (640)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Effect of exchange rate changes on cash and equivalents (3,768)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (415)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
NET DECREASE IN CASH AND EQUIVALENTS (49,803)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (108,197)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD 92,405us-gaap_CashAndCashEquivalentsAtCarryingValue 178,130us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND EQUIVALENTS AT END OF PERIOD 42,602us-gaap_CashAndCashEquivalentsAtCarryingValue 69,933us-gaap_CashAndCashEquivalentsAtCarryingValue
Parent Company [Member]    
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) 12,593us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(22,589)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash provided by (used in) operating activities (49,888)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(30,836)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of property, plant and equipment (188)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(618)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Acquired businesses, net of cash acquired   0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Intercompany distributions 10,000gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
10,000gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Proceeds from sale of investments (8,891)us-gaap_PaymentsForProceedsFromInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Proceeds from sale of assets 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash used in investing activities 18,703us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
9,382us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 285us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
584us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Purchase of shares for treasury (37,577)us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(63,370)us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Proceeds from long-term debt 97,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
629,568us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Payments of long-term debt (28,101)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(582,108)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Change in short-term borrowings 0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Financing costs (590)us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(10,142)us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Purchase of ESOP shares   (10,000)gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Tax effect from exercise/vesting of equity awards, net 345gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
273gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Dividend (3,911)us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(8,290)us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Other, net 95us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
144us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash provided by (used in) financing activities 27,546us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(43,341)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
CASH FLOWS FROM DISCONTINUED OPERATIONS:    
Net cash used in discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Effect of exchange rate changes on cash and equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
NET DECREASE IN CASH AND EQUIVALENTS (3,639)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(64,795)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD 6,813us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
CASH AND EQUIVALENTS AT END OF PERIOD 3,174us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
4,199us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Guarantor Companies [Member]    
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) 22,921us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
20,417us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net cash provided by (used in) operating activities (451)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(27,389)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of property, plant and equipment (30,584)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(29,921)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Acquired businesses, net of cash acquired   (1,000)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Intercompany distributions (10,000)gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(10,000)gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Proceeds from sale of investments 0us-gaap_PaymentsForProceedsFromInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
 
Proceeds from sale of assets 12us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
230us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net cash used in investing activities (40,572)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(40,691)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Purchase of shares for treasury 0us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Proceeds from long-term debt 0us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
10,939us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Payments of long-term debt (717)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(12,097)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Change in short-term borrowings 0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Financing costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Purchase of ESOP shares   0gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Tax effect from exercise/vesting of equity awards, net 0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Dividend 0us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
5,000us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Other, net 21,021us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
43,140us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net cash provided by (used in) financing activities 20,304us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
46,982us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
CASH FLOWS FROM DISCONTINUED OPERATIONS:    
Net cash used in discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Effect of exchange rate changes on cash and equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
NET DECREASE IN CASH AND EQUIVALENTS (20,719)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(21,098)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD 31,522us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
 
CASH AND EQUIVALENTS AT END OF PERIOD 10,803us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
25,259us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Non-Guarantor Companies [Member]    
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) 21,510us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
20,576us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net cash provided by (used in) operating activities 7,288us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
31,649us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of property, plant and equipment (8,941)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(4,306)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Acquired businesses, net of cash acquired   (21,781)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Intercompany distributions 0gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0gff_IntercompanyDistributions
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Proceeds from sale of investments     
Proceeds from sale of assets 165us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
64us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net cash used in investing activities (8,776)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(26,023)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Purchase of shares for treasury 0us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_PaymentsForRepurchaseOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Proceeds from long-term debt 2,556us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
4,007us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Payments of long-term debt (607)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
7,895us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Change in short-term borrowings (572)us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
4,908us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Financing costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(545)us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Purchase of ESOP shares   0gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Tax effect from exercise/vesting of equity awards, net 0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Dividend 0us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
0us-gaap_PaymentsOfDividends
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Other, net (21,021)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(43,140)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net cash provided by (used in) financing activities (19,644)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(26,875)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
CASH FLOWS FROM DISCONTINUED OPERATIONS:    
Net cash used in discontinued operations (545)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(640)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Effect of exchange rate changes on cash and equivalents (3,768)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(415)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
NET DECREASE IN CASH AND EQUIVALENTS (25,445)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(22,304)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD 54,070us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
 
CASH AND EQUIVALENTS AT END OF PERIOD 28,625us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
40,475us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Elimination [Member]    
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from sale of investments 0us-gaap_PaymentsForProceedsFromInvestments
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
 
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 0us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
 
Elimination [Member]    
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) (44,431)us-gaap_NetIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
(40,993)us-gaap_NetIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Net cash provided by (used in) operating activities 0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisition of property, plant and equipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Acquired businesses, net of cash acquired   0us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Intercompany distributions 0gff_IntercompanyDistributions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0gff_IntercompanyDistributions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Proceeds from sale of assets 0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Net cash used in investing activities 0us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock   0us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Purchase of shares for treasury 0us-gaap_PaymentsForRepurchaseOfCommonStock
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PaymentsForRepurchaseOfCommonStock
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Proceeds from long-term debt 0us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Payments of long-term debt 0us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Change in short-term borrowings 0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ProceedsFromRepaymentsOfShortTermDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Financing costs 0us-gaap_PaymentsOfFinancingCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PaymentsOfFinancingCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Purchase of ESOP shares   0gff_PaymentsToAcquireEmployeeStockOwnershipPlanShares
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Tax effect from exercise/vesting of equity awards, net 0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0gff_ProceedsFromTaxBenefitFromExerciseOfOptionsAndVestingOfRestrictedStock
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Dividend 0us-gaap_PaymentsOfDividends
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_PaymentsOfDividends
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Other, net 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Net cash provided by (used in) financing activities 0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
CASH FLOWS FROM DISCONTINUED OPERATIONS:    
Net cash used in discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
Effect of exchange rate changes on cash and equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
NET DECREASE IN CASH AND EQUIVALENTS 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
 
CASH AND EQUIVALENTS AT END OF PERIOD $ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember
$ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ConsolidationEliminationsMember