Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2012	Dec. 30, 2011
Activity In Accrued Warranty And Service Liabilities Absract
Balance, beginning of year	$ 6,709	$ 6,862
Assumed in business acquisition	1,121	0
Charged to expense	2,927	5,110
Margin on parts sales reversed	1,413	2,676
Reductions for claims settled	(4,320)	(7,939)
Balance, end of period	7,850	6,709
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	7,103	6,563
Accrued warranty and service liabilities	7,850	6,709
Accrued trade promotions	3,640	5,852
Payable for employee stock purchases	3,417	6,607
Customer advances and deferred revenue	12,374	280
Income taxes payable	5,786	2,689
Other	36,144	20,896
Total other current liabilities	$ 76,314	$ 49,596