$EAF
GRAFTECH INTERNATIONAL LTD Stock $eaf

$eaf Overview Financials Valuation SEC Filings Company Website

2019 Form 10-K Financial Statement

#000093114820000024 Filed on February 21, 2020

Income Statement

Concept	2019	2018 Q4	2018 Q3
Revenue	$1.791B	$532.8M	$454.9M
YoY Change	-5.54%	176.81%	231.44%
Cost Of Revenue	$750.4M	$214.4M	$180.3M
YoY Change	6.33%	61.57%	49.63%
Gross Profit	$1.040B	$318.4M	$274.6M
YoY Change	-12.59%	432.59%	1538.29%
Gross Profit Margin	58.1%	59.77%	60.37%
Selling, General & Admin	$63.67M	$15.68M	$14.23M
YoY Change	2.65%	1.91%	7.08%
% of Gross Profit	6.12%	4.93%	5.18%
Research & Development	$2.684M	$601.0K	$518.0K
YoY Change	26.07%	61.13%	-61.02%
% of Gross Profit	0.26%	0.19%	0.19%
Depreciation & Amortization	$49.70M	$18.70M	$16.00M
YoY Change	-7.1%	21.43%	-9.6%
% of Gross Profit	4.78%	5.87%	5.83%
Operating Expenses	$66.36M	$16.28M	$14.75M
YoY Change	3.42%	3.31%	0.89%
Operating Profit	$974.0M	$302.1M	$259.9M
YoY Change	-13.5%	586.27%	12042.9%
Interest Expense	$127.3M	-$34.10M	$33.86M
YoY Change	-5.72%	354.67%	334.48%
% of Operating Profit	13.07%	-11.29%	13.03%
Other Income/Expense, Net	-$5.203M	-$828.0K	-$1.502M
YoY Change	54.81%	-112.89%	-471.78%
Pretax Income	$842.8M	$242.6M	$225.1M
YoY Change	-6.65%	465.5%	-4436.47%
Income Tax	$98.23M	$12.70M	$24.87M
% Of Pretax Income	11.65%	5.23%	11.05%
Net Earnings	$744.6M	$229.6M	$199.5M
YoY Change	-12.83%	312.8%	-5189.72%
Net Earnings / Revenue	41.58%	43.1%	43.85%
Basic Earnings Per Share	$2.58		$0.67
Diluted Earnings Per Share	$2.58	$790.4K	$0.67
COMMON SHARES
Basic Shares Outstanding	289.1M shares	290.5M shares	296.1M shares
Diluted Shares Outstanding	289.1M shares		296.1M shares

Balance Sheet

Concept	2019	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$80.90M	$49.90M	$102.5M
YoY Change	62.12%	272.39%	525.0%
Cash & Equivalents	$80.90M	$49.88M	$102.5M
Short-Term Investments
Other Short-Term Assets	$14.30M	$4.699M	$61.40M
YoY Change	-7.14%	-17.99%	73.45%
Inventory	$326.4M	$293.7M	$262.0M
Prepaid Expenses
Receivables	$247.1M	$248.3M	$204.7M
Other Receivables	$13.80M	$0.00	$0.00
Total Short-Term Assets	$682.6M	$638.1M	$630.6M
YoY Change	6.97%	79.96%	112.75%
LONG-TERM ASSETS
Property, Plant & Equipment	$521.0M	$513.7M	$519.6M
YoY Change	1.42%	0.17%	2.0%
Goodwill		$171.1M	$171.1M
YoY Change		0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$67.60M	$110.9M	$135.2M
YoY Change	-21.94%	-14.58%	9.2%
Total Long-Term Assets	$843.6M	$867.4M	$872.1M
YoY Change	-2.74%	2.71%	5.89%
TOTAL ASSETS
Total Short-Term Assets	$682.6M	$638.1M	$630.6M
Total Long-Term Assets	$843.6M	$867.4M	$872.1M
Total Assets	$1.526B	$1.505B	$1.503B
YoY Change	1.37%	25.55%	34.17%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$78.70M	$88.10M	$80.62M
YoY Change	-10.67%	27.47%	38.1%
Accrued Expenses	$99.90M	$132.7M	$92.00M
YoY Change	-18.58%	110.63%	118.01%
Deferred Revenue		$5.380M
YoY Change		-74.11%
Short-Term Debt	$0.00	$106.3M	$106.3M
YoY Change		545.4%	700.52%
Long-Term Debt Due	$100.0K	$106.3M	$106.3M
YoY Change	-99.91%	545.4%	700.52%
Total Short-Term Liabilities	$220.2M	$327.1M	$282.7M
YoY Change	-32.68%	115.27%	124.76%
LONG-TERM LIABILITIES
Long-Term Debt	$1.813B	$2.050B	$2.077B
YoY Change	-11.59%	534.97%	548.19%
Other Long-Term Liabilities	$134.6M	$72.52M	$68.46M
YoY Change	-15.35%	5.24%	-13.32%
Total Long-Term Liabilities	$1.947B	$2.123B	$2.145B
YoY Change	-11.86%	441.81%	437.16%
TOTAL LIABILITIES
Total Short-Term Liabilities	$220.2M	$327.1M	$282.7M
Total Long-Term Liabilities	$1.947B	$2.123B	$2.145B
Total Liabilities	$2.217B	$2.450B	$2.428B
YoY Change	-14.14%	350.55%	362.35%
SHAREHOLDERS EQUITY
Retained Earnings		-$1.893B	-$1.895B
YoY Change		624.34%	497.73%
Common Stock		$2.905M	$2.905M
YoY Change		-3.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	-$691.1M	-$1.077B	-$1.038B
YoY Change
Total Liabilities & Shareholders Equity	$1.526B	$1.505B	$1.503B
YoY Change	1.37%	25.55%	34.17%

Cashflow Statement

Concept	2019	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$744.6M	$229.6M	$199.5M
YoY Change	-12.83%	312.8%	-5189.72%
Depreciation, Depletion And Amortization	$49.70M	$18.70M	$16.00M
YoY Change	-7.1%	21.43%	-9.6%
Cash From Operating Activities	$805.3M	$224.4M	$234.5M
YoY Change	-3.74%	7380.0%	679.07%
INVESTING ACTIVITIES
Capital Expenditures	$64.10M	-$20.60M	-$18.90M
YoY Change	-6.04%	76.07%	96.88%
Acquisitions
YoY Change
Other Investing Activities	$200.0K	$0.00	$100.0K
YoY Change	-77.78%	-100.0%	-99.64%
Cash From Investing Activities	-$63.88M	-$20.50M	-$18.90M
YoY Change	-5.07%	105.0%	-204.42%
FINANCING ACTIVITIES
Cash Dividend Paid	$20.61M
YoY Change	-62.94%
Common Stock Issuance & Retirement, Net	$10.90M
YoY Change
Debt Paid & Issued, Net	$350.1M
YoY Change	521.12%
Cash From Financing Activities	-$709.6M	-256.3M	-278.9M
YoY Change	-2.93%	-6671.79%	533.86%
NET CHANGE
Cash From Operating Activities	$805.3M	224.4M	234.5M
Cash From Investing Activities	-$63.88M	-20.50M	-18.90M
Cash From Financing Activities	-$709.6M	-256.3M	-278.9M
Net Change In Cash	$31.80M	-52.40M	-63.30M
YoY Change	-16.89%	1590.32%	-1607.14%
FREE CASH FLOW
Cash From Operating Activities	$805.3M	$224.4M	$234.5M
Capital Expenditures	$64.10M	-$20.60M	-$18.90M
Free Cash Flow	$741.2M	$245.0M	$253.4M
YoY Change	-3.54%	1566.67%	538.29%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
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	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
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CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	7500000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	68000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-21000	USD
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CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	300000000	shares
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CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum	0.0298
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CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-13888
CY2019	dei	Entity Registrant Name EntityRegistrantName	GRAFTECH INTERNATIONAL LTD.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-2496053
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	982 Keynote Circle
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	44131
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Brooklyn Heights
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2019	dei	City Area Code CityAreaCode	216
CY2019	dei	Local Phone Number LocalPhoneNumber	676-2000
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2019	dei	Trading Symbol TradingSymbol	EAF
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
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CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2019	dei	Entity Shell Company EntityShellCompany	false
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CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.58
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.87
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.05
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	289074601	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	297753770	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302225923	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	744602000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	854219000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	7983000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-6371000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18391000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	23028000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	4810000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-7698000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	4819000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1561000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26089000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	27847000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	743041000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	828130000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35830000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	744602000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	854219000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	7983000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	61819000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	66413000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-23827000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-15695000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	66443000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	USD
CY2017	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	5300000	USD
CY2019	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	3393000	USD
CY2018	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	86478000	USD
CY2017	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	17503000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-37078000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Paid In Kind Interest PaidInKindInterest	6344000	USD
CY2018	us-gaap	Paid In Kind Interest PaidInKindInterest	5320000	USD
CY2017	us-gaap	Paid In Kind Interest PaidInKindInterest	6805000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-21831000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-15761000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	9607000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	47687000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	177754000	USD
CY2017	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	20004000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2489000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	583000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4652000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	805316000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	836603000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	36573000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	64103000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	68221000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	34664000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	27254000	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	219000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	926000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	5211000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-63884000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-67295000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2199000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-12607000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	5110000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	77000000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	45692000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	114839000	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	2235000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	0	USD
CY2018	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	304782000	USD
CY2017	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	0	USD
CY2019	gti	Related Party Stock Repurchase RelatedPartyStockRepurchase	250000000	USD
CY2018	gti	Related Party Stock Repurchase RelatedPartyStockRepurchase	225000000	USD
CY2017	gti	Related Party Stock Repurchase RelatedPartyStockRepurchase	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10868000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	350140000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	56372000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	266000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	20613000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	55616000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	0	USD
CY2019	gti	Payment Of Dividends Related Party PaymentOfDividendsRelatedParty	78010000	USD
CY2018	gti	Payment Of Dividends Related Party PaymentOfDividendsRelatedParty	1488649000	USD
CY2017	gti	Payment Of Dividends Related Party PaymentOfDividendsRelatedParty	0	USD
CY2019	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2018	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	750000000	USD
CY2017	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	27326000	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-709631000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-731044000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32995000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	31801000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	38264000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1379000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	376000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49880000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13365000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11610000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	80935000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	49880000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	13365000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	121075000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-746000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1749000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	108006000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	25277000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	99278000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21444000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3467000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	750000000	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	404000	USD
CY2018	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	139180000	USD
CY2017	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-29755000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21549000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	126355000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-15649000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3929000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-7116000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-10565000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-18174000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	67054000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	2762000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-11551000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	15724000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	33317000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	62000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-2113000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-114000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	47687000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	177754000	USD
CY2017	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	20004000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	577385000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	7983000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4819000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	23028000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	27847000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	613215000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	854219000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-6866000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-832000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18391000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26089000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	225000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1151000	USD
CY2018	gti	Payment Of Dividends Related Party PaymentOfDividendsRelatedParty	1488649000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	55616000	USD
CY2018	us-gaap	Repayment Of Notes Receivable From Related Parties RepaymentOfNotesReceivableFromRelatedParties	750000000	USD
CY2018	us-gaap	Repayment Of Notes Receivable From Related Parties RepaymentOfNotesReceivableFromRelatedParties	750000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	-1076769000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	744602000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	744602000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11830000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-7020000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-6371000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-6371000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1561000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	10868000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2146000	USD
CY2019	gti	Payment Of Dividends Related Party PaymentOfDividendsRelatedParty	78010000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	20613000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	-691073000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<div style="line-height:120%;padding-top:6px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Discussion of Business and Structure</span></div>
CY2019	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	11600000	USD
CY2019	us-gaap	Depreciation Depreciation	49700000	USD
CY2018	us-gaap	Depreciation Depreciation	53500000	USD
CY2017	us-gaap	Depreciation Depreciation	50400000	USD
CY2019Q4	gti	Capital Expenses Incurred But Not Yetpaid CapitalExpensesIncurredButNotYetpaid	11500000	USD
CY2018Q4	gti	Capital Expenses Incurred But Not Yetpaid CapitalExpensesIncurredButNotYetpaid	13700000	USD
CY2019Q4	us-gaap	Other Deferred Costs Gross OtherDeferredCostsGross	20200000	USD
CY2018Q4	us-gaap	Other Deferred Costs Gross OtherDeferredCostsGross	24300000	USD
CY2019	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	4100000	USD
CY2018	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	3500000	USD
CY2017	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	300000	USD
CY2018	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	12400000	USD
CY2017	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	8000000.0	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	4900000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	4200000	USD
CY2018Q4	gti	Capitalized Maintenance Cost CapitalizedMaintenanceCost	800000	USD
CY2017Q4	gti	Capitalized Maintenance Cost CapitalizedMaintenanceCost	9800000	USD
CY2019	gti	Amortization Deferred Maintenance Cost AmortizationDeferredMaintenanceCost	5100000	USD
CY2018	gti	Amortization Deferred Maintenance Cost AmortizationDeferredMaintenanceCost	3100000	USD
CY2017	gti	Amortization Deferred Maintenance Cost AmortizationDeferredMaintenanceCost	3300000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:12px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-top:12px;text-align:justify;text-indent:57px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenue and expenses. Significant estimates and assumptions are used for, but are not limited to inventory valuation, pension and other post-retirement benefits, allowance for doubtful accounts, contingent liabilities, accruals and valuation allowances, asset impairment, and environmental-related accruals. Actual results could differ from our estimates.</span></div>
CY2018Q4	us-gaap	Deferred Compensation Sharebased Arrangements Liability Current And Noncurrent DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent	10400000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1790793000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1895910000	USD
CY2019Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	247100000	USD
CY2018Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	248300000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1251093000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1211036000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1144574000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	29461000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	3636164000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2100000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1200000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	0	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	229250	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	5.13
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	979790	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.08
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.45
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y6M
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y6M
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1113480	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y6M
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.17
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	181822	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.73
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	968720	shares
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	15.68
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	229250	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	12.90
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	188810	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	15.70
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares	77502	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	14.87
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	931658	shares
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	15.06
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	221752	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	181822	shares
CY2019Q4	us-gaap	Deferred Compensation Sharebased Arrangements Liability Current And Noncurrent DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent	6900000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1790793000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1895910000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	550771000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	513020000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	513705000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1812823000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	2156634000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	141000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	106323000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1812682000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2050311000	USD
CY2018Q1	gti	Equity Interest Pledge EquityInterestPledge	0.65
CY2017Q4	us-gaap	Goodwill Goodwill	171117000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	171117000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	171117000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	142300000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	58446000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	83854000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	142300000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	46294000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	96006000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12200000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12900000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13600000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	11400000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	10700000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	10100000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	9200000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	8000000.0	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	121010000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	100844000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	24060000	USD
CY2019	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	0	USD
CY2018	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	5090000	USD
CY2017	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	0	USD
CY2019	us-gaap	Redemption Premium RedemptionPremium	0	USD
CY2018	us-gaap	Redemption Premium RedemptionPremium	4782000	USD
CY2017	us-gaap	Redemption Premium RedemptionPremium	0	USD
CY2019	gti	Accretion Expenseon Extinguished Debt AccretionExpenseonExtinguishedDebt	0	USD
CY2018	gti	Accretion Expenseon Extinguished Debt AccretionExpenseonExtinguishedDebt	19414000	USD
CY2017	gti	Accretion Expenseon Extinguished Debt AccretionExpenseonExtinguishedDebt	6454000	USD
CY2019	us-gaap	Accretion Expense AccretionExpense	2196000	USD
CY2018	us-gaap	Accretion Expense AccretionExpense	1455000	USD
CY2017	us-gaap	Accretion Expense AccretionExpense	0	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4125000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3476000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	309000	USD
CY2019	us-gaap	Interest Expense InterestExpense	127331000	USD
CY2018	us-gaap	Interest Expense InterestExpense	135061000	USD
CY2017	us-gaap	Interest Expense InterestExpense	30823000	USD
CY2019	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0530
CY2018	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0602
CY2017	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0457
CY2018Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.06375
CY2018	gti	Accretion Expenseon Extinguished Debt AccretionExpenseonExtinguishedDebt	19400000	USD
CY2018	gti	Accelerated Accretion AcceleratedAccretion	18700000	USD
CY2018	gti	Accelerated Amortizationof Debt Issuance Costs AcceleratedAmortizationofDebtIssuanceCosts	300000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1812800000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	2156600000	USD
CY2019Q3	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.051
CY2018Q4	gti	Hedging Instruments Nonderivative Assets HedgingInstrumentsNonderivativeAssets	5500000	USD
CY2017Q4	gti	Hedging Instruments Nonderivative Assets HedgingInstrumentsNonderivativeAssets	9500000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	532084000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	47370000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	2200000	USD
CY2019	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	3500000	USD
CY2018	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	7000000.0	USD
CY2019Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	104820000	USD
CY2018Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	99935000	USD
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	137230000	USD
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	125767000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	71598000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	68015000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	313648000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	293717000	USD
CY2019Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	9986000	USD
CY2018Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	10720000	USD
CY2019Q4	us-gaap	Prepaid Taxes PrepaidTaxes	13890000	USD
CY2018Q4	us-gaap	Prepaid Taxes PrepaidTaxes	19242000	USD
CY2019Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	12738000	USD
CY2018Q4	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	11507000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4332000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4699000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	40946000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	46168000	USD
CY2019Q4	us-gaap	Land Land	46548000	USD
CY2019Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	7416000	USD
CY2018Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	6977000	USD
CY2019Q4	us-gaap	Deferred Revenue DeferredRevenue	11776000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	42131000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	733417000	USD
CY2018Q4	us-gaap	Land Land	45947000	USD
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	71784000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	68680000	USD
CY2019Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	567715000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	688842000	USD
CY2019Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	11801000	USD
CY2018Q4	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	17284000	USD
CY2018Q4	us-gaap	Deferred Revenue DeferredRevenue	5380000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	17342000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	20811000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	48335000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	50452000	USD
CY2019Q4	us-gaap	Postemployment Benefits Liability Noncurrent PostemploymentBenefitsLiabilityNoncurrent	16528000	USD
CY2018Q4	us-gaap	Postemployment Benefits Liability Noncurrent PostemploymentBenefitsLiabilityNoncurrent	16192000	USD
CY2019Q4	gti	Pension And Related Benefits PensionAndRelatedBenefits	37431000	USD
CY2018Q4	gti	Pension And Related Benefits PensionAndRelatedBenefits	33718000	USD
CY2019Q4	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	18603000	USD
CY2018Q4	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	22609000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	72562000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	72519000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1129000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1097000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	326000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4636000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	122000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	771000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-291000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-90000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	0	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5474000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1129000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1097000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7500000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	4816000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	14000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	227000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5057000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4995000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	4724000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7994000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4475000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3598000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	8073000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y3M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0561
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4496000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2693000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	702000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	358000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	379000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8628000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	100278000	USD
CY2017	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-9753000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	98225000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	48920000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10781000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	555000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	8073000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4475000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3598000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4474000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2747000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1497000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	334000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	269000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	343000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	162600000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	147600000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	126812000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	115199000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0259
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0371
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0150
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0174
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0371
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0320
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0492
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0494
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0174
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0157
CY2019	us-gaap	Product Warranty Expense ProductWarrantyExpense	1033000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	726000	USD
CY2019Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	1835000	USD
CY2019	gti	Defined Contribution Plan Employer Matching Contribution Percentof Employees Gross Pay Basic Contribution DefinedContributionPlanEmployerMatchingContributionPercentofEmployeesGrossPayBasicContribution	0.05
CY2019	gti	Defined Contribution Plan Employer Matching Contribution Percentof Employees Gross Pay Supplemental Contribution DefinedContributionPlanEmployerMatchingContributionPercentofEmployeesGrossPaySupplementalContribution	0.45
CY2019	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	2100000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	1300000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	1600000	USD
CY2017Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	349000	USD
CY2018	us-gaap	Product Warranty Expense ProductWarrantyExpense	1510000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	331000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	1528000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	85365000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-68032000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-26981000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	757462000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	970840000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	30412000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	842827000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	902808000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3431000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	16589000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	787000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1066000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5690000	USD
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$EAF
GRAFTECH INTERNATIONAL LTD Stock $eaf

2019 Form 10-K Financial Statement

#000093114820000024 Filed on February 21, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EAF GRAFTECH INTERNATIONAL LTD Stock $eaf

2019 Form 10-K Financial Statement

#000093114820000024 Filed on February 21, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EAF
GRAFTECH INTERNATIONAL LTD Stock $eaf