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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Inventories [Abstract]
Raw materials and parts	$ 137,234	$ 129,676
Work-in-process	78,287	76,052
Finished goods	81,263	81,000
Used equipment	21,926	21,894
Total	$ 318,710	$ 308,622

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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