Supply Chain Financing	6 Months Ended
Jun. 30, 2012
Supply Chain Financing [Abstract]
Supply Chain Financing	Supply Chain Financing We have a supply chain financing arrangement with a financing party. Under this arrangement, we essentially assign our rights to purchase needle coke from a third-party supplier to the financing party. The financing party purchases the product from a supplier under the standard payment terms and then immediately resells it to us under longer payment terms. The financing party pays the supplier the purchase price for the product and then we pay the financing party. Our payment to the financing party for this needle coke includes a mark-up (the “Mark-Up”). The Mark-Up is a premium expressed as a percentage of the purchase price. The Mark-Up is subject to quarterly reviews. Based on the terms of the arrangement, the total amount that we owe to the financing party may not exceed $49.3 million at any point in time. We record the inventory once title and risk of loss transfers from the supplier to the financing party. We record our liability to the financing party as an accrued liability. For the three months ended June 30, 2011, and 2012, our purchases of inventory under this arrangement were $43.0 million and $45.4 million, respectively with a recognized Mark-Up of $0.3 million and $0.2 million, respectively. For the six months ended June 30, 2011, and 2012, our purchases of inventory under this arrangement were $91.4 million and $91.9 million, respectively with a recognized Mark-Up of $0.7 million and $0.3 million, respectively.

Supply Chain Financing

We have a supply chain financing arrangement with a financing party. Under this arrangement, we essentially assign our rights to purchase needle coke from a third-party supplier to the financing party. The financing party purchases the product from a supplier under the standard payment terms and then immediately resells it to us under longer payment terms. The financing party pays the supplier the purchase price for the product and then we pay the financing party. Our payment to the financing party for this needle coke includes a mark-up (the “Mark-Up”). The Mark-Up is a premium expressed as a percentage of the purchase price. The Mark-Up is subject to quarterly reviews. Based on the terms of the arrangement, the total amount that we owe to the financing party may not exceed $49.3 million at any point in time.

We record the inventory once title and risk of loss transfers from the supplier to the financing party. We record our liability to the financing party as an accrued liability. For the three months ended June 30, 2011, and 2012, our purchases of inventory under this arrangement were $43.0 million and $45.4 million, respectively with a recognized Mark-Up of $0.3 million and $0.2 million, respectively. For the six months ended June 30, 2011, and 2012, our purchases of inventory under this arrangement were $91.4 million and $91.9 million, respectively with a recognized Mark-Up of $0.7 million and $0.3 million, respectively.