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Nature Of Operations And Significant Accounting Policies (Summary Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Nature Of Operations And Significant Accounting Policies [Abstract]
Finished goods	$ 105,442	$ 90,825
Finished parts and subassemblies	35,100	33,091
Work in process	74,608	58,519
Raw materials	145,539	136,642
Total inventories	$ 360,689	$ 319,077

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, 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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