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Segment Information - Segment Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net sales	$ 202,223	$ 209,275	$ 352,902	$ 399,520
Gross profit	38,659	65,735	64,081	110,179
Operating income	12,225	42,323	11,988	65,405
Interest expense	536	1,179	1,267	2,311
Non-operating other expense (income), net	8	(267)	24	(272)
Provisions for income taxes	4,367	15,451	3,622	23,253
Equity in earnings of affiliate-Climate Control	(172)	(170)	(343)	(341)
Income from continuing operations	7,486	26,130	7,418	40,454
Chemical [Member]
Segment Reporting Information [Line Items]
Net sales	121,328	138,134	198,818	262,339
Gross profit	12,095	43,500	14,506	67,498
Operating income	6,385	39,147	2,579	59,494
Climate Control [Member]
Segment Reporting Information [Line Items]
Net sales	77,357	67,546	147,627	130,304
Gross profit	25,403	20,989	47,385	40,435
Operating income	9,456	7,313	15,840	13,151
Other [Member]
Segment Reporting Information [Line Items]
Net sales	3,538	3,595	6,457	6,877
Gross profit	1,161	1,246	2,190	2,246
Operating income	(3,616)	(4,137)	(6,431)	(7,240)
Non-operating other expense (income), net	$ 8	$ (267)	$ 24	$ (272)

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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