Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Jan. 03, 2015
Net current deferred tax assets:
Allowance for doubtful accounts	$ 1,089	$ 1,240
Compensation	15,491	16,817
Inventory differences	4,497	5,691
Marketing accrual	1,355	1,454
Stock-based compensation	11,923	9,906
Accrued post-retirement benefit obligations	6,682	6,341
OCI tax effected items	3,169	3,887
Vacation accrual	4,181	3,875
Warranty Accrual	6,052	6,023
Other – net	12,167	10,774
Total deferred tax assets	66,606	66,008
Net long-term deferred tax liabilities:
Deferred income	(4,907)	(4,836)
Goodwill	(79,471)	(80,366)
Prepaids	(7,876)	(7,724)
Tax over book depreciation	(59,308)	(41,770)
Total deferred tax liabilities	(151,562)	(134,696)
Valuation allowance	(3,978)	(3,413)
Total net deferred tax liabilities	88,934	72,101
Current net deferred tax assets	0	17,310
Long term net deferred tax liabilities	$ (88,934)	$ (89,411)