$GFF
GRIFFON CORP Stock $gff

$gff Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000005072521000044 Filed on April 30, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$574.7M	$566.4M
YoY Change	1.47%	3.04%
Cost Of Revenue	$413.5M	$414.3M
YoY Change	-0.2%	0.53%
Gross Profit	$161.2M	$152.0M
YoY Change	6.03%	13.85%
Gross Profit Margin	28.05%	26.84%
Selling, General & Admin	$117.6M	$126.5M
YoY Change	-7.04%	13.14%
% of Gross Profit	72.92%	83.18%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$13.15M	$15.72M
YoY Change	-16.35%	1.47%
% of Gross Profit	8.16%	10.34%
Operating Expenses	$117.6M	$126.5M
YoY Change	-7.04%	13.14%
Operating Profit	$43.65M	$25.57M
YoY Change	70.73%	-0.61%
Interest Expense	$15.83M	$16.87M
YoY Change	-6.16%	-3.69%
% of Operating Profit	36.27%	65.99%
Other Income/Expense, Net	-$14.45M	-$22.64M
YoY Change	-36.18%	41.15%
Pretax Income	$29.20M	$2.929M
YoY Change	896.96%	-69.75%
Income Tax	$11.08M	$2.034M
% Of Pretax Income	37.95%	69.44%
Net Earnings	$17.11M	$895.0K
YoY Change	1811.96%	-177.42%
Net Earnings / Revenue	2.98%	0.16%
Basic Earnings Per Share	$0.34	$0.02
Diluted Earnings Per Share	$0.32	$0.02
COMMON SHARES
Basic Shares Outstanding	50.84M shares	41.57M shares
Diluted Shares Outstanding	53.26M shares	43.73M shares

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$175.6M	$69.00M
YoY Change	154.49%	18.97%
Cash & Equivalents	$175.6M	$69.02M
Short-Term Investments
Other Short-Term Assets	$57.20M	$43.00M
YoY Change	33.02%	-6.72%
Inventory	$484.8M	$462.1M
Prepaid Expenses
Receivables	$399.2M	$335.0M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$1.192B	$1.004B
YoY Change	18.73%	1.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$495.9M	$335.8M
YoY Change	47.67%	0.89%
Goodwill	$446.4M	$436.8M
YoY Change	2.19%	-0.53%
Intangibles	$586.2M	$575.0M
YoY Change	1.94%	-1.9%
Long-Term Investments		$0.00
YoY Change
Other Assets	$27.44M	$29.56M
YoY Change	-7.16%	94.55%
Total Long-Term Assets	$1.333B	$1.315B
YoY Change	1.33%	13.88%
TOTAL ASSETS
Total Short-Term Assets	$1.192B	$1.004B
Total Long-Term Assets	$1.333B	$1.315B
Total Assets	$2.524B	$2.319B
YoY Change	8.86%	8.16%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$257.3M	$228.7M
YoY Change	12.51%	2.46%
Accrued Expenses	$151.1M	$118.5M
YoY Change	27.53%	-1.7%
Deferred Revenue	$22.96M	$21.29M
YoY Change	7.85%	-24.57%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$14.91M	$9.470M
YoY Change	57.48%	-12.37%
Total Short-Term Liabilities	$458.6M	$387.1M
YoY Change	18.46%	5.72%
LONG-TERM LIABILITIES
Long-Term Debt	$1.044B	$1.216B
YoY Change	-14.17%	0.83%
Other Long-Term Liabilities	$122.3M	$102.3M
YoY Change	19.54%	7.75%
Total Long-Term Liabilities	$1.166B	$1.319B
YoY Change	-11.56%	1.34%
TOTAL LIABILITIES
Total Short-Term Liabilities	$458.6M	$387.1M
Total Long-Term Liabilities	$1.166B	$1.319B
Total Liabilities	$1.760B	$1.842B
YoY Change	-4.48%	10.34%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$764.4M	$476.5M
YoY Change
Total Liabilities & Shareholders Equity	$2.524B	$2.319B
YoY Change	8.86%	8.16%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$17.11M	$895.0K
YoY Change	1811.96%	-177.42%
Depreciation, Depletion And Amortization	$13.15M	$15.72M
YoY Change	-16.35%	1.47%
Cash From Operating Activities	-$47.50M	-$44.00M
YoY Change	7.95%	-25.42%
INVESTING ACTIVITIES
Capital Expenditures	$8.813M	$9.347M
YoY Change	-5.71%	3.61%
Acquisitions
YoY Change
Other Investing Activities	-$2.400M	$100.0K
YoY Change	-2500.0%	-100.93%
Cash From Investing Activities	-$14.50M	-$9.300M
YoY Change	55.91%	-52.79%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	3.400M	59.70M
YoY Change	-94.3%	7.57%
NET CHANGE
Cash From Operating Activities	-47.50M	-44.00M
Cash From Investing Activities	-14.50M	-9.300M
Cash From Financing Activities	3.400M	59.70M
Net Change In Cash	-58.60M	6.400M
YoY Change	-1015.62%	-127.59%
FREE CASH FLOW
Cash From Operating Activities	-$47.50M	-$44.00M
Capital Expenditures	$8.813M	$9.347M
Free Cash Flow	-$56.31M	-$53.35M
YoY Change	5.56%	-21.57%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Central Index Key EntityCentralIndexKey	0000050725
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-06620
	dei	Entity Registrant Name EntityRegistrantName	GRIFFON CORPORATION
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	11-1893410
	dei	Entity Address Address Line1 EntityAddressAddressLine1	712 Fifth Ave, 18th Floor
	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10019
	dei	City Area Code CityAreaCode	212
	dei	Local Phone Number LocalPhoneNumber	957-5000
	dei	Security12b Title Security12bTitle	Common Stock, $0.25 par value
	dei	Trading Symbol TradingSymbol	GFF
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50717000	shares
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	27860000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2929000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	67029000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19880000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10748000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2034000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20417000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8373000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	17112000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	895000	USD
	us-gaap	Net Income Loss NetIncomeLoss	46612000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11507000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.02
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50838000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41369000	shares
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.02
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53264000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43734000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53211000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43826000	shares
CY2021Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.08
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.075
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.16
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	17112000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	895000	USD
	us-gaap	Net Income Loss NetIncomeLoss	46612000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11507000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1739000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-16471000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	13862000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-10001000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1245000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-669000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-2951000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1341000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	1791000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	968000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	1103000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	667000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4775000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14834000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	17916000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-7993000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	21887000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-13939000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	64528000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	31149000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	31544000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3514000	USD
	us-gaap	Net Income Loss NetIncomeLoss	46612000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11507000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	9501000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	8302000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8291000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	4692000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	194000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	596000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1349000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2267000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-6690000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2334000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	408000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-151000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	274000	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	5291000	USD
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
	gff	Increase Decrease In Receivables And Contract Assets IncreaseDecreaseInReceivablesAndContractAssets	47146000	USD
	gff	Increase Decrease In Receivables And Contract Assets IncreaseDecreaseInReceivablesAndContractAssets	61815000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	74186000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21262000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-271000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6005000	USD
	gff	Increase Decrease In Accounts Payable Accrued Liabilities Income Taxes Payable And Net Change To Leases IncreaseDecreaseInAccountsPayableAccruedLiabilitiesIncomeTaxesPayableAndNetChangeToLeases	-1470000	USD
	gff	Increase Decrease In Accounts Payable Accrued Liabilities Income Taxes Payable And Net Change To Leases IncreaseDecreaseInAccountsPayableAccruedLiabilitiesIncomeTaxesPayableAndNetChangeToLeases	-38053000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2400000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-560000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-25841000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-60843000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23986000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22519000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2242000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	10531000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	14725000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2138000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	0	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	82000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	290000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-27000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-13532000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-32760000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	8678000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7349000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2909000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7479000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	14029000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1061343000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7573000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	939071000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	571000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	13176000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-214000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	83000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-5916000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	94351000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-1512000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-1994000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	2749000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	USD
	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	1237000	USD
	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	-1994000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1527000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-2107000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-42525000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3353000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	218089000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72377000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	175564000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	69024000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020Q1	gff	Contractwith Customer Asset Cumulative Catchup Adjustmentto Revenue ContractwithCustomerAssetCumulativeCatchupAdjustmenttoRevenue	2188000	USD
	gff	Contractwith Customer Asset Cumulative Catchup Adjustmentto Revenue ContractwithCustomerAssetCumulativeCatchupAdjustmenttoRevenue	422000	USD
CY2021Q1	gff	Contractwith Customer Asset Cumulative Catchup Adjustmentto Revenue ContractwithCustomerAssetCumulativeCatchupAdjustmenttoRevenue	1423000	USD
	gff	Contractwith Customer Asset Cumulative Catchup Adjustmentto Revenue ContractwithCustomerAssetCumulativeCatchupAdjustmenttoRevenue	3220000	USD
CY2021Q1	us-gaap	Capitalized Contract Cost Accumulated Impairment CapitalizedContractCostAccumulatedImpairment	8500000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Accumulated Impairment CapitalizedContractCostAccumulatedImpairment	10800000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	353870000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.65
CY2021Q1	gff	Contract With Customer Asset And Capitalized Contract Cost Net Current ContractWithCustomerAssetAndCapitalizedContractCostNetCurrent	75000000	USD
CY2020Q3	gff	Contract With Customer Asset And Capitalized Contract Cost Net Current ContractWithCustomerAssetAndCapitalizedContractCostNetCurrent	84426000	USD
	gff	Increase Decrease Contract With Customer Asset And Capitalized Contract Cost Net Current IncreaseDecreaseContractWithCustomerAssetAndCapitalizedContractCostNetCurrent	-9426000	USD
CY2021Q1	gff	Contract With Customer Asset And Capitalized Contract Cost Net Noncurrent ContractWithCustomerAssetAndCapitalizedContractCostNetNoncurrent	7700000	USD
CY2020Q3	gff	Contract With Customer Asset And Capitalized Contract Cost Net Noncurrent ContractWithCustomerAssetAndCapitalizedContractCostNetNoncurrent	7500000	USD
CY2021Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	22964000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	24386000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-1422000	USD
CY2020Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2960000	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2960000	USD
CY2021Q1	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	155720000	USD
CY2020Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	146351000	USD
CY2021Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	86299000	USD
CY2020Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	83697000	USD
CY2021Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	242734000	USD
CY2020Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	183777000	USD
CY2021Q1	us-gaap	Inventory Net InventoryNet	484753000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	413825000	USD
CY2021Q1	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	834220000	USD
CY2020Q3	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	815517000	USD
CY2021Q1	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	493215000	USD
CY2020Q3	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	471553000	USD
CY2021Q1	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	341005000	USD
CY2020Q3	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	343964000	USD
CY2021Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13450000	USD
CY2020Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13316000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	26338000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	26748000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	8505000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	1228000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	161000	USD
	gff	Accounts Receivable Allowance For Credit Loss Other Deduction AccountsReceivableAllowanceForCreditLossOtherDeduction	22000	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	9594000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	442643000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1246000	USD
	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	811000	USD
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	3287000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2403000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	446365000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	208718000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	79870000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	205404000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	75016000	USD
CY2021Q1	us-gaap	Indefinite Lived Trademarks IndefiniteLivedTrademarks	228658000	USD
CY2020Q3	us-gaap	Indefinite Lived Trademarks IndefiniteLivedTrademarks	224640000	USD
CY2021Q1	gff	Finite Lived And Infinite Lived Intangible Asset Gross FiniteLivedAndInfiniteLivedIntangibleAssetGross	437376000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	79870000	USD
CY2020Q3	gff	Finite Lived And Infinite Lived Intangible Asset Gross FiniteLivedAndInfiniteLivedIntangibleAssetGross	430044000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	75016000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	5250000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2433000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	4574000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	9376000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	9224000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4811000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4796000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	9198000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	9198000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	9198000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	78080000	USD
	us-gaap	Number Of Reporting Units NumberOfReportingUnits	3	unit
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10748000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	27860000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2034000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2929000	USD
CY2021Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	7562000	USD
CY2021Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges Amount Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringChargesAmountNetOfTax	5651000	USD
CY2021Q1	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	949000	USD
CY2021Q1	gff	Effective Income Tax Rate Reconciliation Disposition Of Business Net Of Tax EffectiveIncomeTaxRateReconciliationDispositionOfBusinessNetOfTax	766000	USD
CY2021Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1913000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	3104000	USD
CY2020Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges Amount Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringChargesAmountNetOfTax	3005000	USD
CY2020Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCost	2960000	USD
CY2020Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition Cost Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostNetOfTax	2321000	USD
CY2020Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Debt Extinguishment Loss EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDebtExtinguishmentLoss	6690000	USD
CY2020Q1	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Debt Extinguishment Loss Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDebtExtinguishmentLossNetOfTax	5245000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1413000	USD
CY2021Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.300
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.359
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20417000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	67029000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8373000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19880000	USD
	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	18362000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges Amount Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringChargesAmountNetOfTax	13951000	USD
	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	-5291000	USD
	gff	Effective Income Tax Rate Reconciliation Disposition Of Business Net Of Tax EffectiveIncomeTaxRateReconciliationDispositionOfBusinessNetOfTax	-5251000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-115000	USD
	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	9538000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges Amount Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringChargesAmountNetOfTax	7153000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCost	2960000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition Cost Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostNetOfTax	2321000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Debt Extinguishment Loss EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDebtExtinguishmentLoss	6690000	USD
	gff	Effective Income Tax Rate Reconciliation Nondeductible Expense Debt Extinguishment Loss Net Of Tax EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDebtExtinguishmentLossNetOfTax	5245000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-580000	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.311
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.344
CY2021Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1074915000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	339000	USD
CY2020Q3	gff	Long Term Debt Gross Noncurrent LongTermDebtGrossNoncurrent	1054500000	USD
CY2021Q1	gff	Long Term Debt Capitalized Fees And Expenses LongTermDebtCapitalizedFeesAndExpenses	16482000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	1058772000	USD
CY2020Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1064422000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	363000	USD
CY2020Q3	gff	Long Term Debt Capitalized Fees And Expenses LongTermDebtCapitalizedFeesAndExpenses	17821000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	1046964000	USD
CY2021Q1	gff	Long Term Debt Gross Current LongTermDebtGrossCurrent	14913000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	0	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	14913000	USD
CY2020Q3	gff	Long Term Debt Gross Current LongTermDebtGrossCurrent	9922000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Premium Current DebtInstrumentUnamortizedPremiumCurrent	0	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	9922000	USD
CY2021Q1	gff	Long Term Debt Gross Noncurrent LongTermDebtGrossNoncurrent	1060002000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Premium Noncurrent DebtInstrumentUnamortizedPremiumNoncurrent	339000	USD
CY2021Q1	gff	Long Term Debt Capitalized Fees And Expenses LongTermDebtCapitalizedFeesAndExpenses	16482000	USD
CY2021Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1043859000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	13000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Premium Noncurrent DebtInstrumentUnamortizedPremiumNoncurrent	363000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	13000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	93000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	93000	USD
CY2020Q3	gff	Long Term Debt Capitalized Fees And Expenses LongTermDebtCapitalizedFeesAndExpenses	17821000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1037042000	USD
CY2021Q1	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	6000	USD
CY2021Q1	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	6000	USD
CY2020Q1	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	28000	USD
CY2020Q1	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	28000	USD
CY2021Q1	us-gaap	Interest Paid Net InterestPaidNet	15162000	USD
CY2021Q1	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-12000	USD
CY2021Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	657000	USD
CY2021Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	15831000	USD
CY2020Q1	us-gaap	Interest Paid Net InterestPaidNet	15876000	USD
CY2020Q1	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-45000	USD
CY2020Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	950000	USD
CY2020Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	16871000	USD
	us-gaap	Interest Paid Net InterestPaidNet	30172000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-24000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1325000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	31521000	USD
	us-gaap	Interest Paid Net InterestPaidNet	30815000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	-112000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2155000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	33082000	USD
CY2012Q4	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.013
CY2021Q1	us-gaap	Restricted Stock Expense RestrictedStockExpense	4349000	USD
CY2020Q1	us-gaap	Restricted Stock Expense RestrictedStockExpense	3662000	USD
	us-gaap	Restricted Stock Expense RestrictedStockExpense	7777000	USD
	us-gaap	Restricted Stock Expense RestrictedStockExpense	6812000	USD
CY2021Q1	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	944000	USD
CY2020Q1	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	658000	USD
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1724000	USD
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1490000	USD
CY2021Q1	us-gaap	Share Based Compensation ShareBasedCompensation	5293000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	4320000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	9501000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	8302000	USD
CY2016Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	50000000	USD
CY2018Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	50000000	USD
CY2021Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	57955000	USD
CY2021Q1	gff	Shares Paid For Tax Withholding For Share Based Compensation Value SharesPaidForTaxWithholdingForShareBasedCompensationValue	0	USD
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	56684000	shares
CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	47431000	shares
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	56684000	shares
CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	47431000	shares
CY2021Q1	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	1961000	shares
CY2020Q1	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	2159000	shares
CY2021Q1	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	1961000	shares
CY2020Q1	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	2159000	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	3822000	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	3562000	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	3822000	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	3562000	shares
CY2021Q1	gff	Weighted Average Number Basic Shares Outstanding Adjustment WeightedAverageNumberBasicSharesOutstandingAdjustment	63000	shares
CY2020Q1	gff	Weighted Average Number Basic Shares Outstanding Adjustment WeightedAverageNumberBasicSharesOutstandingAdjustment	145000	shares
	gff	Weighted Average Number Basic Shares Outstanding Adjustment WeightedAverageNumberBasicSharesOutstandingAdjustment	184000	shares
	gff	Weighted Average Number Basic Shares Outstanding Adjustment WeightedAverageNumberBasicSharesOutstandingAdjustment	341000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50838000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41565000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50717000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41369000	shares
CY2021Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2426000	shares
CY2020Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2169000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2494000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2457000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53264000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43734000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53211000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43826000	shares
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020Q3	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	8497000	USD
CY2021Q1	us-gaap	Assets Assets	2524280000	USD
CY2020Q3	us-gaap	Assets Assets	2448439000	USD
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	634832000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	566350000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1244123000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1114788000	USD
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	634832000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	566350000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1244123000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1114788000	USD
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	634832000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	566350000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1244123000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1114788000	USD
CY2021Q1	gff	Earnings Before Income Tax Depreciation And Amortization EarningsBeforeIncomeTaxDepreciationAndAmortization	67781000	USD
CY2020Q1	gff	Earnings Before Income Tax Depreciation And Amortization EarningsBeforeIncomeTaxDepreciationAndAmortization	47963000	USD
	gff	Earnings Before Income Tax Depreciation And Amortization EarningsBeforeIncomeTaxDepreciationAndAmortization	142421000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	745000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1151000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1489000	USD
	gff	Earnings Before Income Tax Depreciation And Amortization EarningsBeforeIncomeTaxDepreciationAndAmortization	103123000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	27860000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2929000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	67029000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19880000	USD
CY2021Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	15883000	USD
CY2020Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	15719000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31149000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31544000	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12060000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9347000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23986000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22519000	USD
CY2021Q1	gff	Assets Of Continuing Operations AssetsOfContinuingOperations	2517460000	USD
CY2020Q3	gff	Assets Of Continuing Operations AssetsOfContinuingOperations	2439942000	USD
CY2021Q1	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	6820000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	2302000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2545000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2586000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	5089000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	5172000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	0	USD
CY2020Q1	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	4000	USD
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	0	USD
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	8000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1573000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1042000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-3146000	USD
CY2021Q1	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Assets DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets	5295000	USD
CY2020Q3	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Assets DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets	6406000	USD
CY2021Q1	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	6820000	USD
CY2020Q3	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	8497000	USD
CY2021Q1	us-gaap	Disposal Group Including Discontinued Operation Accrued Liabilities Current DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent	4600000	USD
CY2020Q3	us-gaap	Disposal Group Including Discontinued Operation Accrued Liabilities Current DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent	3797000	USD
CY2021Q1	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	6415000	USD
CY2020Q3	us-gaap	Disposal Group Including Discontinued Operation Other Noncurrent Liabilities DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities	7014000	USD
CY2021Q1	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	11015000	USD
CY2020Q3	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	10811000	USD
CY2021Q1	us-gaap	Restructuring Charges RestructuringCharges	7562000	USD
	us-gaap	Restructuring Charges RestructuringCharges	18362000	USD
CY2021Q1	us-gaap	Restructuring Charges RestructuringCharges	7562000	USD
CY2020Q4	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	10800000	USD
CY2020Q4	us-gaap	Payments For Restructuring PaymentsForRestructuring	4132000	USD
CY2020Q4	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	5794000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	3839000	USD
CY2020Q1	us-gaap	Restructuring Charges RestructuringCharges	3104000	USD
	us-gaap	Restructuring Charges RestructuringCharges	18362000	USD
	us-gaap	Restructuring Charges RestructuringCharges	9538000	USD
CY2020Q3	us-gaap	Restructuring Reserve RestructuringReserve	2965000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-2084000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-227000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-389000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-454000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-778000	USD
CY2021Q1	us-gaap	Disposal Group Including Discontinued Operation Prepaid And Other Assets Current DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent	1525000	USD
CY2020Q3	us-gaap	Disposal Group Including Discontinued Operation Prepaid And Other Assets Current DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent	2091000	USD
CY2021Q1	us-gaap	Restructuring Reserve RestructuringReserve	791000	USD
CY2021Q1	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	7562000	USD
CY2021Q1	us-gaap	Payments For Restructuring PaymentsForRestructuring	8113000	USD
CY2021Q1	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	2497000	USD
CY2021Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	847000	USD
CY2020Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	615000	USD
CY2021Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	320000	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	745000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-227000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-389000	USD
CY2021Q1	us-gaap	Investment Income Net InvestmentIncomeNet	55000	USD
CY2020Q1	us-gaap	Investment Income Net InvestmentIncomeNet	-230000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	806000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1393000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-379000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	369000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-454000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-778000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	3576000	USD
CY2021Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1053000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	386000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	-149000	USD
	gff	Contract Award Income ContractAwardIncome	700000	USD
CY2020Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	10834000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7344000	USD
CY2020Q3	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	10843000	USD
CY2019Q3	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7894000	USD
CY2021Q1	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	6477000	USD
CY2020Q1	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	4862000	USD
	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	11216000	USD
	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	8227000	USD
CY2021Q1	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	4633000	USD
CY2020Q1	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	4417000	USD
CY2020Q1	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1393000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2167000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2823000	USD
CY2021Q1	us-gaap	Lease Cost LeaseCost	13110000	USD
CY2020Q1	us-gaap	Lease Cost LeaseCost	12403000	USD
	us-gaap	Lease Cost LeaseCost	26311000	USD
	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	9381000	USD
	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	8332000	USD
CY2021Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	12678000	USD
CY2020Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7789000	USD
CY2021Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	12678000	USD
CY2020Q1	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	7789000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	5883000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1108000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4775000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-14241000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	593000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-14834000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	19173000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1257000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	17916000	USD
	us-gaap	Lease Cost LeaseCost	25138000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	22099000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	21582000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1865000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1940000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-7354000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	639000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7993000	USD
CY2021Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	9970000	USD
CY2020Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	9187000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	20010000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	18739000	USD
CY2021Q1	us-gaap	Variable Lease Cost VariableLeaseCost	2087000	USD
CY2020Q1	us-gaap	Variable Lease Cost VariableLeaseCost	1823000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	4134000	USD
	gff	Cash Paid For Lease Liability CashPaidForLeaseLiability	23964000	USD
	gff	Cash Paid For Lease Liability CashPaidForLeaseLiability	23522000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	154929000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	161627000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	30685000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	31848000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	128714000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	136054000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	159399000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	167902000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	18068000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	18774000	USD
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3110000	USD
CY2020Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3352000	USD
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	14950000	USD
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	15339000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	18060000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	18691000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	4296000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2383000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	19128000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	2381000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	34484000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	3087000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	26884000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	2749000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	20180000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	2195000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	18214000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	2077000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	12376000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	2075000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	63859000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	7777000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	195125000	USD
CY2021Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	22341000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	35726000	USD
CY2021Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	4281000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	159399000	USD
CY2021Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	18060000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y1M6D
CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P8Y2M12D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0445
CY2021Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0550
CY2009Q2	gff	Net Capital Cost Value In Proposed Remedia Action Plan NetCapitalCostValueInProposedRemediaActionPlan	10000000	USD

Files In Submission

Name	View Source	Status
0000050725-21-000044-index-headers.html	Edgar Link	pending
0000050725-21-000044-index.html	Edgar Link	pending
0000050725-21-000044.txt	Edgar Link	pending
0000050725-21-000044-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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gff-20210331.xsd	Edgar Link	pending
gff-20210331_cal.xml	Edgar Link	unprocessable
gff-20210331_def.xml	Edgar Link	unprocessable
gff-20210331_htm.xml	Edgar Link	completed
gff-20210331_lab.xml	Edgar Link	unprocessable
gff-20210331_pre.xml	Edgar Link	unprocessable
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gff3-31x202110q2312.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$GFF
GRIFFON CORP Stock $gff

2021 Q1 Form 10-Q Financial Statement

#000005072521000044 Filed on April 30, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GFF GRIFFON CORP Stock $gff

2021 Q1 Form 10-Q Financial Statement

#000005072521000044 Filed on April 30, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GFF
GRIFFON CORP Stock $gff