Inventories	6 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are stated at the lower of cost or market. Approximately forty percent of the Company’s inventories use the last-in, first-out ("LIFO") method of determining cost. All other inventories are valued at the first-in, first-out ("FIFO") method of determining cost. 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 must necessarily be based on management’s estimates of expected year-end inventory levels and costs. Because these are subject to many factors beyond management’s control, estimated interim results, which were immaterial, are subject to change in the final year-end LIFO inventory valuation and therefore, no adjustment was recorded as of June 30, 2015.

Inventories

6 Months Ended

Jun. 30, 2015

Inventories are stated at the lower of cost or market. Approximately forty percent of the Company’s inventories use the last-in, first-out ("LIFO") method of determining cost. All other inventories are valued at the first-in, first-out ("FIFO") method of determining cost. 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 must necessarily be based on management’s estimates of expected year-end inventory levels and costs. Because these are subject to many factors beyond management’s control, estimated interim results, which were immaterial, are subject to change in the final year-end LIFO inventory valuation and therefore, no adjustment was recorded as of June 30, 2015.