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Nature Of Operations And Significant Accounting Policies (Summary Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Finished goods	$ 113,872	$ 105,442
Finished parts and subassemblies	37,517	35,100
Work in process	59,277	74,608
Raw materials	142,059	145,539
Total inventories	$ 352,725	$ 360,689

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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