Interim LIFO Calculations	6 Months Ended
Interim LIFO Calculations	Jun. 30, 2011
Interim LIFO Calculations [Abstract]
Interim LIFO Calculations	NOTE D – Interim LIFO Calculations An actual valuation of inventory under the LIFO method can be made only at the end of each year based on actual inventory levels. Accordingly, interim LIFO calculations must necessarily be based on management's estimates. Since these estimates may be affected by factors beyond management's control, interim results are subject to the final year-end LIFO inventory valuations.

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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