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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventories [Abstract]
Raw materials and parts	$ 131,780	$ 129,676
Work-in-process	86,754	76,052
Finished goods	95,010	85,060
Used equipment	26,282	21,895
Total	$ 339,826	$ 312,683

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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