Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 110,671	$ 84,279	$ 77,664
Work in process	3,149	3,038	3,090
Finished goods	13,258	13,894	15,410
Inventories, net	$ 127,078	$ 101,211	$ 96,164

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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