Inventories (Schedule Of Inventory Costs) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Inventories [Abstract]
Raw materials	$ 336,774	$ 304,069
Work in process	10,598	8,282
Finished goods	5,479	2,605
Inventories	$ 352,851	$ 314,956

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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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-Topic 210
-SubTopic 10
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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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-Publisher FASB
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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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-Name Accounting Standards Codification
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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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