Purchase of Comfortaire Purchase Price Allocation (Details) (USD $)	3 Months Ended		0 Months Ended	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Jan. 17, 2013 Comfortaire Corporation [Member]	Dec. 29, 2012 Comfortaire Corporation [Member]	Mar. 30, 2013 Comfortaire Corporation [Member]
Business Acquisition [Line Items]
Cash paid for Comfortaire			$ 15,500,000
Net Sales	258,237,000	262,383,000		10,500,000
Business Acquisition, Purchase Price Allocation [Abstract]
Accounts receivable					365,000
Inventories					678,000
Other assets					219,000
Property and equipment					509,000
Goodwill					6,157,000
Goodwill					8,638,000
Intangible assets					16,566,000
Accounts payable					344,000
Warranty liabilities					658,000
Other liabilities					64,000
Total liabilities acquired					1,066,000
Net assets acquired					$ 15,500,000
Tax Deductibel Period Acquired Goodwill and Intangible Assets			15 years