Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts	$ 1,228	$ 746
Compensation	7,187	7,243
Inventory differences	2,725	1,445
Marketing accrual	885	1,238
Stock-based compensation	8,494	7,680
Accrued post-retirement benefit obligations	6,676	6,287
Vacation accrual	2,896	2,687
Warranty accrual	4,185	3,842
Net operating loss carryforward	6,654	4,522
Capital loss carryforward	2,012	2,011
Lease liability	16,392	17,212
Payroll deferral	4,114	0
Other – net	9,290	8,916
Total deferred tax assets	72,738	63,829
Deferred income	(4,743)	(4,838)
Goodwill and other intangible assets	(48,934)	(54,951)
Prepaid expenses	(6,454)	(6,867)
Right of use asset	(16,626)	(16,251)
Tax over book depreciation	(58,556)	(57,682)
Total deferred tax liabilities	(135,313)	(140,589)
Valuation allowance	(11,524)	(10,260)
Total net deferred tax liabilities	(74,099)	(87,020)
Long-term net deferred tax assets	607	176
Long-term net deferred tax liabilities	$ (74,706)	$ (87,196)