XML 53 R62.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Long-Term Debt And Liquidity Long-Term Debt And Liquidity (Senior Notes) (Details) (Senior Notes [Member], USD $) In Millions, unless otherwise specified | Nov. 20, 2012 | Nov. 20, 2012 Maximum [Member] | Dec. 31, 2013 Minimum [Member]
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Principal amount issued | $ 300 |  |
Stated interest rate | 6.375% |  |
Redemption price percentage of principal prior to November 15, 2016 | 100.00% |  |
Redemption percentage price of aggregate principal prior to November 15, 2015 |  | 35.00% |
Redemption price percentage of principal prior to November 15, 2015 | 106.375% |  |
Repurchase percentage price of aggregate principal due to change in control | 101.00% |  |
Unpaid indebtness after maturity or acceleration |  |  | 50.0
Unpaid judgment or decree |  |  | $ 50.0

X
- Definition Aggregate Principal Redemption Percentage + References No definition available. + Details
Name: | gti_AggregatePrincipalRedemptionPercentagePricePriorToNovember152015
Namespace Prefix: | gti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption Price Percentage Of Principal Prior To November 15, 2015 + References No definition available. + Details
Name: | gti_RedemptionPricePercentageOfPrincipalPriorToNovember152015
Namespace Prefix: | gti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption Price Percentage Of Principal + References No definition available. + Details
Name: | gti_RedemptionPricePercentageOfPrincipalPriorToNovember152016
Namespace Prefix: | gti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Repurchase Percentage Price Of Aggregate Principal Due To Change In Control + References No definition available. + Details
Name: | gti_RepurchasePercentagePriceOfAggregatePrincipalDueToChangeInControl
Namespace Prefix: | gti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unpaid Indebtness After Maturity Or Acceleration + References No definition available. + Details
Name: | gti_UnpaidIndebtnessAfterMaturityOrAcceleration
Namespace Prefix: | gti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Unpaid Judgment Or Decree + References No definition available. + Details
Name: | gti_UnpaidJudgmentOrDecree
Namespace Prefix: | gti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration