XML 40 R27.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Supply Chain Financing Supply Chain Financing | 12 Months Ended
--- | ---
Dec. 31, 2015
Supply Chain Financing [Abstract] |
Supply Chain Financing | Supply Chain Financing We had a supply chain financing arrangement with a financing party. Under this arrangement, we essentially assigned our rights to purchase needle coke from a supplier to the financing party. The financing party purchased the product from a supplier under the standard payment terms and then immediately resold it to us under longer payment terms. The financing party paid the supplier the purchase price for the product and then we paid the financing party. Our payment to the financing party for this needle coke included a mark-up (the “Mark-Up”). The Mark-Up was a premium expressed as a percentage of the purchase price. Based on the terms of the arrangement, the total amount that we owed to the financing party could not exceed $49.3 million at any point in time. We recorded the inventory once title and risk of loss transfered from the supplier to the financing party. We recorded our liability to the financing party as an accrued liability. Our liability under this arrangement was $0.0 million as of December 31, 2014 and we recognized Mark-Up of $0.0 million as interest expense in the twelve months ended December 31, 2014. We did not utilize this arrangement during 2014.

X
- Definition Supply Chain Financing [Abstract] + References No definition available. + Details
Name: | gti_SupplyChainFinancingAbstract
Namespace Prefix: | gti_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Supply Chain Financing [Text Block] + References No definition available. + Details
Name: | gti_SupplyChainFinancingTextBlock
Namespace Prefix: | gti_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration