Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts	$ 746	$ 897
Compensation	7,243	6,419
Inventory differences	1,445	2,498
Marketing accrual	1,238	1,260
Stock-based compensation	7,680	8,456
Accrued post-retirement benefit obligations	6,287	5,500
Vacation accrual	2,687	2,783
Warranty accrual	3,842	3,761
Net operating loss carryforward	4,522	4,790
Capital loss carryforward	2,011	2,001
Lease liability	17,212
Other – net	8,916	11,413
Total deferred tax assets	63,829	49,778
Deferred income	(4,838)	(4,707)
Goodwill and other intangible assets	(54,951)	(52,468)
Prepaids	(6,867)	(6,536)
Right of use asset	(16,251)
Tax over book depreciation	(57,682)	(59,500)
Total deferred tax liabilities	(140,589)	(123,211)
Valuation allowance	(10,260)	(7,153)
Total net deferred tax liabilities	(87,020)	(80,586)
Long-term net deferred tax assets	176	1,569
Long-term net deferred tax liabilities	$ (87,196)	$ (82,155)