Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 30, 2012	Dec. 30, 2011
Activity In Accrued Warranty And Service Liabilities Absract
Balance, beginning of year	$ 6,709	$ 6,862
Charged to expense	1,294	5,110
Margin on parts sales reversed	830	2,676
Reductions for claims settled	(2,075)	(7,939)
Balance, end of period	6,758	6,709
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	6,633	6,563
Accrued warranty and service liabilities	6,758	6,709
Accrued trade promotions	2,735	5,852
Payable for employee stock purchases	1,374	6,607
Income taxes payable	18,087	2,689
Other	24,256	21,176
Total other current liabilities	$ 59,843	$ 49,596