XML 47 R34.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Preferred Share Issuance and Merger (Details) - USD ($) |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 11, 2015 | May. 18, 2015 | Mar. 31, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Aug. 15, 2015 | May. 17, 2015
Goodwill |  |  | $ 173,117,000 |  | $ 172,059,000 |  |
Max Reimbursement to Acquiror |  |  |  | $ 500,000 |  |  |
Common Stock, Par or Stated Value Per Share |  |  |  |  |  |  | $ 0.01
Goodwill, Purchase Accounting Adjustments |  |  | 1,100,000 |  |  |  |
purchase price adjustment, deferred taxes |  |  | $ 2,000,000 |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |
Convertible Preferred Stock, Conversion Price |  |  |  |  |  |  | $ 5.05
BCP IV GrafTech Holdings LP [Member] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 173,117,000 |
Amount |  | $ 854,337,000 |  |  |  |  |
Convertible Preferred Stock [Member] | BCP IV GrafTech Holdings LP [Member] |  |  |  |  |  |  |
Shares |  | 150,000 |  |  |  |  |
Amount | $ 150,000,000 | $ 150,000,000 |  |  |  |  |
Series A Preferred Stock [Member] | Convertible Preferred Stock [Member] | BCP IV GrafTech Holdings LP [Member] |  |  |  |  |  |  |
Shares |  | 136,616 |  |  |  |  |
Preferred stock, par value | $ 0.01 |  |  |  |  |  |
Business Combination, Equity Interest Transferred, Percentage of Common Stock Outstanding Before Transaction | 19.90% |  |  |  |  |  |
Series B Preferred Stock [Member] | Convertible Preferred Stock [Member] | BCP IV GrafTech Holdings LP [Member] |  |  |  |  |  |  |
Shares |  | 13,384 |  |  |  |  |
Preferred stock, par value | $ 0.01 |  |  |  |  |  |
Delayed draw term loan facility | Term Loan Facility |  |  |  |  |  |  |
Unused borrowing capacity | $ 40,000,000 |  |  |  |  |  |
Senior Notes | Senior Subordinated Notes Due Nov 2015 [Member] |  |  |  |  |  |  |
Early Repayment of Subordinated Debt | $ 200,000,000 |  |  |  |  |  |

X
- Definition Business Combination, Equity Interest Transferred, Percentage of Common Stock Outstanding Before Transaction + References No definition available. + Details
Name: | gti_BusinessCombinationEquityInterestTransferredPercentageofCommonStockOutstandingBeforeTransaction
Namespace Prefix: | gti_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Convertible Preferred Stock, Conversion Price + References No definition available. + Details
Name: | gti_ConvertiblePreferredStockConversionPrice
Namespace Prefix: | gti_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum amount the Company will be required to reimburse to Aquiror + References No definition available. + Details
Name: | gti_MaxReimbursementtoAcquiror
Namespace Prefix: | gti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition purchase price adjustment, deferred taxes + References No definition available. + Details
Name: | gti_Purchasepriceadjustmentdeferredtaxes
Namespace Prefix: | gti_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. + References Reference 1: 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(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_EarlyRepaymentOfSubordinatedDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=gti_BCPIVGrafTechHoldingsLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gti_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gti_SeniorSubordinatedNotesDueNov2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |