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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Inventories
Raw materials	$ 72,616	$ 77,364	$ 70,780
In-process products	22,226	21,357	19,218
Finished products	89,226	81,408	76,968
Total inventories	$ 184,068	$ 180,129	$ 166,966

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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