XML 77 R64.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Aug. 14, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Predecessor [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount |  | $ 162,047 | $ 162,047
Accumulated Amortization |  | (97,688) | (86,949)
Net Carrying Amount |  | 64,359 | 75,098
Predecessor [Member] | Trade Name [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount |  | 7,900 | 7,900
Accumulated Amortization |  | (5,173) | (4,817)
Net Carrying Amount |  | 2,727 | 3,083
Predecessor [Member] | Technological Know-How [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount |  | 43,349 | 43,349
Accumulated Amortization |  | (28,649) | (24,940)
Net Carrying Amount |  | 14,700 | 18,409
Predecessor [Member] | Customer Related Intangible [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount |  | 110,798 | 110,798
Accumulated Amortization |  | (63,866) | (57,192)
Net Carrying Amount |  | $ 46,932 | $ 53,606
Successor [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount | $ 155,700 |  |
Accumulated Amortization | (6,188) |  |
Net Carrying Amount | 149,512 |  |
Successor [Member] | Trade Name [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount | 26,800 |  |
Accumulated Amortization | (1,048) |  |
Net Carrying Amount | 25,752 |  |
Successor [Member] | Technological Know-How [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount | 63,200 |  |
Accumulated Amortization | (3,327) |  |
Net Carrying Amount | 59,873 |  |
Successor [Member] | Customer Related Intangible [Member] |  |  |
Goodwill [Line Items] |  |  |
Gross Carrying Amount | 65,700 |  |
Accumulated Amortization | (1,813) |  |
Net Carrying Amount | $ 63,887 |  |

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=gti_CustomerRelatedIntangibleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |