Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
General Accounting Policies [Line Items]
Amortized cost basis of the debt securities	$ 12,100	$ 12,000
Gross unrealized gain		100
Gross unrealized loss		0
Allowance for doubtful accounts receivable, current	$ 4,300	$ 5,100
Percentage of LIFO inventory	78.00%	71.00%
Effect of LIFO inventory, decrease in cost of goods sold		$ 30	$ 200
LIFO reserve	$ 25,110	28,012
Reserve for estimated warranty settlements, current	8,200	8,500
Reserve for estimated warranty settlements, noncurrent	8,000	8,200
Product development costs	31,100	29,700	27,300
Freight expense	133,400	$ 131,000	$ 123,800
Accumulated foreign earnings considered permanently reinvested	33,900
Income tax effect of repatriation of foreign earnings	$ 10,300
Antidilutive securities excluding from computation of earnings per share	493,202	500,058	769,394
Insurance liabilities	$ 27,700
Land Improvements [Member] | Minimum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	10 years
Land Improvements [Member] | Maximum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	20 years
Buildings [Member] | Minimum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	10 years
Buildings [Member] | Maximum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	40 years
Machinery and Equipment [Member] | Minimum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	3 years
Machinery and Equipment [Member] | Maximum [Member]
General Accounting Policies [Line Items]
Useful life, minimum	12 years