Inventories	12 Months Ended
Dec. 31, 2011
Inventories [Abstract]
Inventories	Note 3—Inventories At December 31, 2010 and 2011, approximately 37 percent and 29 percent, respectively, of the Company’s inventories had been valued under the LIFO method. Increases in inventory balances in the international segment as well as the inclusion of the consolidated financial statements for COOCSA as a result of the acquisition have caused this percentage to decrease in 2011. The remaining inventories have been valued under the first-in first-out (“FIFO”) or average cost method and all inventories are stated at the lower of cost or market. Under the LIFO method, inventories have been reduced by approximately $191,180 and $236,532 at December 31, 2010 and 2011, respectively, from current cost which would be reported under the FIFO method.

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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