Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 90,941	$ 84,279	$ 83,199
Work in process	3,010	3,038	2,254
Finished goods	14,406	13,894	14,324
Inventories, net	$ 108,357	$ 101,211	$ 99,777

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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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