Significant Concentrations - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Airxcel, Inc.
Concentration Risk [Line Items]
Percentage of Purchases from Major Suppliers	22.00%	20.00%	18.00%
Zhejiang
Concentration Risk [Line Items]
Percentage of Purchases from Major Suppliers	6.00%	6.00%
Zhejiang | Maximum
Concentration Risk [Line Items]
Percentage of Purchases from Major Suppliers			5.00%