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Inventories - Schedule of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Type Of Inventory [Line Items]
Finished Goods	$ 36,851	$ 29,009
Work-in- Process	3,576	4,855
Raw Materials	24,546	25,642
Total	64,973	59,506
Chemical products [Member]
Type Of Inventory [Line Items]
Finished Goods	25,487	18,509
Work-in- Process
Raw Materials	4,194	4,063
Total	29,681	22,572
Climate Control products [Member]
Type Of Inventory [Line Items]
Finished Goods	7,045	6,871
Work-in- Process	3,576	4,855
Raw Materials	20,352	21,579
Total	30,973	33,305
Industrial machinery and components [Member]
Type Of Inventory [Line Items]
Finished Goods	4,319	3,629
Work-in- Process
Raw Materials
Total	$ 4,319	$ 3,629

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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