Inventories (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Percentage of LIFO inventory	39.00%	55.00%
Excess of current costs over stated LIFO value	$ 9,483	$ 9,483
Inventory obsolescence reserves	$ 8,559	$ 8,596

Amount of valuation reserve for inventory.

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