Summary of Significant Accounting Policies (Other) (Details) (USD $)	12 Months Ended
	Dec. 30, 2011 Y	Dec. 31, 2010
Components of other assets [Abstract]
Cash surrender value of life insurance	$ 7,523,000	$ 6,185,000
Capitalized software	2,021,000	1,050,000
Deposits and other	2,277,000	1,872,000
Total	11,821,000	9,107,000
Other Assets Details [Abstract]
Life insurance premiums paid amount	1,500,000
Capitalized Software Estimated Useful Life Minimum (years)	2
Capitalized Software Estimated Useful Life Maximum	5
Other Current Liabilities Details [Abstract]
Accrued self-insurance retentions	6,563,000	6,675,000
Accrued warranty and service liabilities	6,709,000	6,862,000
Accrued trade promotions	5,852,000	5,947,000
Payable for employee stock purchases	6,607,000	5,655,000
Income taxes payable	2,689,000	733,000
Other	21,176,000	18,513,000
Total	49,596,000	44,385,000
Accrued warranty and service liabilities
Balance, beginning of year	6,862,000	7,437,000
Charged to expense	5,110,000	3,484,000
Margin on parts sales reversed	2,676,000	3,412,000
Reductions for claims settled	(7,939,000)	(7,471,000)
Balance, end of year	6,709,000	6,862,000
Revenue Recognition Policy Details [Abstract]
Sales returns as a percentage of sales	2.00%
Derivatives Details [Abstract]
Interest rate swaps, description	In 2007, the Company entered into interest rate swap contracts that effectively fix the rates paid on a total of $80 million of variable rate borrowings. One contract fixed the rate on $40 million of borrowings at 4.7 percent plus the applicable spread (depending on cash flow leverage ratio) until December 2010. The second contract fixed an additional $40 million of borrowings at 4.6 percent plus the applicable spread until January 2011. Both contracts were designated as cash flow hedges against interest rate volatility. Consequently, changes in the fair market value were recorded in accumulated other comprehensive income (loss) (AOCI). Amounts included in AOCI were reclassified to earnings as interest rates varied and as the swap contracts approached expiration dates. Net amounts paid or payable under terms of the contracts were charged to interest expense and totaled $0.1 million in 2011 and $3.5 million in 2010.
Derivatives, Fair Value [Line Items]
UnrealizedLossOnDerivatives	(120,000)	(284,000)
Notional Amount of Foreign Currency Derivatives	20,000,000
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
UnrealizedLossOnDerivatives		(192,000)
Accounts Receivable [Member]
Derivatives, Fair Value [Line Items]
UnrealizedGainOnDerivatives	98,000
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
UnrealizedLossOnDerivatives	0
Interest Rate Swap [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
UnrealizedLossOnDerivatives		(454,000)
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
UnrealizedGainOnDerivatives	$ 218,000	$ 92,000