XML 52 R61.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Goodwill [Line Items] |  |
Gross Carrying Amount | $ 162,047 us-gaap_FiniteLivedIntangibleAssetsGross | $ 162,047 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization | (86,949)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | (67,190)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Net Carrying Amount | 75,098 us-gaap_FiniteLivedIntangibleAssetsNet | 94,857 us-gaap_FiniteLivedIntangibleAssetsNet
Trade Name [Member] |  |
Goodwill [Line Items] |  |
Gross Carrying Amount | 7,900 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember | 7,900 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
Accumulated Amortization | (4,817)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember | (3,944)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
Net Carrying Amount | 3,083 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember | 3,956 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
Technological Know-How [Member] |  |
Goodwill [Line Items] |  |
Gross Carrying Amount | 43,349 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember | 43,349 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember
Accumulated Amortization | (24,940)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember | (18,582)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember
Net Carrying Amount | 18,409 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember | 24,767 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyEquipmentMember
Customer Related Intangible [Member] |  |
Goodwill [Line Items] |  |
Gross Carrying Amount | 110,798 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember | 110,798 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember
Accumulated Amortization | (57,192)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember | (44,664)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember
Net Carrying Amount | $ 53,606 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember | $ 66,134 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = gti_CustomerRelatedIntangibleMember

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

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