Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 28, 2013	Dec. 28, 2012
Activity In Accrued Warranty And Service Liabilities Absract
Balance, beginning of year	$ 7,943	$ 6,709
Assumed in business acquisition	0	1,121
Charged to expense	2,825	6,182
Margin on parts sales reversed	953	2,244
Reductions for claims settled	(4,051)	(8,313)
Balance, end of period	7,670	7,943
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	6,593	6,952
Accrued warranty and service liabilities	7,670	7,943
Accrued trade promotions	5,073	5,669
Payable for employee stock purchases	3,591	7,203
Customer advances and deferred revenue	12,914	10,617
Income taxes payable	12,245	4,305
Other	20,591	22,704
Total other current liabilities	$ 68,677	$ 65,393