Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Inventories [Abstract]
Raw materials, including parts and subassemblies	$ 186,864	$ 163,192
Work-in-process	49,781	38,419
Finished goods	62,262	54,898
Inventories, gross	298,907	256,509
Excess of FIFO costs over LIFO costs	(16,113)	(15,024)
Inventories, net	$ 282,794	$ 241,485

The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized.

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Carrying amount as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Carrying amount as of the balance sheet date of merchandise or goods which are partially completed, are generally comprised of raw materials, labor and factory overhead costs, and which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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