Aircrane Support Parts, net (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Aircrane Support Parts, net
Aircrane parts	$ 67,484	$ 50,572
Major component overhauls	32,787	30,777
Work-in-process	22,301	25,593
Less: Excess and obsolete reserve	(4,505)	(5,050)
Aircrane support parts, net	$ 118,067	$ 101,892

The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ Details