Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Total assets
Total assets	$ 561,169	$ 502,009
Climate Control [Member]
Total assets
Total assets	118,994	119,323
Chemical [Member]
Total assets
Total assets	280,475	214,246
Corporate assets and other [Member]
Total assets
Total assets	$ 161,700	$ 168,440