Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting Policy	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
Inventory Policy	The Company primarily uses the last-in, first-out (LIFO) method of valuing inventory. An actual valuation of inventory under the LIFO method can be made only at the end of each year based on the inventory levels and costs at that time. Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs are subject to the final year-end LIFO inventory valuation. In addition, interim inventory levels include management’s estimates of annual inventory losses due to shrinkage and other factors. The final year-end valuation of inventory is based on an annual physical inventory count performed during the fourth quarter. For further information on inventory valuations and other matters, refer to the consolidated financial statements and footnotes thereto included in the Company’s Form 10-K for the year ended December 31, 2014.
New Accounting Pronouncements Policy	On April 1, 2015, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs," which requires companies to present debt issuance costs associated with a debt liability as a deduction from the carrying amount of that debt liability on the balance sheet rather than being capitalized as an asset. The standard is effective for interim and annual periods beginning after December 15, 2015, and retrospective presentation is required. The Company will adopt ASU No. 2015-03 as required. The ASU will not have a material effect on the Company's results of operations, financial condition or liquidity. Effective January 1, 2015, the Company adopted ASU No. 2014-01, "Accounting for Investments in Qualified Affordable Housing Projects," which allows companies to elect to use the proportional amortization method to account for investments in qualified affordable housing projects if certain conditions are met. Under the proportional amortization method, which replaces the effective yield method, the cost of the investment is amortized in proportion to the tax credits and other tax benefits received to income tax expense. The adoption of ASU No. 2014-01 did not have a material effect on the Company's results of operations, financial condition or liquidity. In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, "Revenue Recognition - Revenue from Contracts with Customers," which is a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under U.S. GAAP. The standard is effective for interim and annual periods beginning after December 15, 2017. Either full retrospective adoption or modified retrospective adoption is permitted. The Company is in the process of evaluating the impact of the standard.

Disclosure of accounting policy for major classes of inventories, bases of stating inventories (for example, lower of cost or market), methods by which amounts are added and removed from inventory classes (for example, FIFO, LIFO, or average cost), loss recognition on impairment of inventories, and situations in which inventories are stated above cost. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory.