Reportable Business Segments (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Number Of Business Segments	3
Revenue From Transactions With Major Customers	$ 0		$ 0		$ 0
Minimum Percentage Of Consolidated Net Sales From Single Customer	10.00%		10.00%		10.00%
Capital Lease Obligations	0		0		0
Income from Equity Method Investments	12,200,000		10,500,000		9,600,000
Residential Heating & Cooling and Commercial Heating & Cooling [Member]
Segment Reporting Information [Line Items]
Income from Equity Method Investments	$ 9,600,000	[1]	$ 5,000,000	[1]	$ 4,900,000	[1]

[1] $9.6 million, $5.0 million and $4.9 million of income from equity method investments to our Residential Heating & Cooling and Commercial Heating & Cooling segments in 2013, 2012 and 2011, respectively. These allocations were recorded as reductions to the segments' Cost of goods sold in the Consolidated Statements of Operations.