Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts	$ 495	$ 1,089
Compensation	16,684	15,491
Inventory differences	3,977	4,497
Marketing accrual	1,458	1,355
Stock-based compensation	11,607	11,923
Accrued post-retirement benefit obligations	10,106	9,851
Vacation accrual	4,153	4,181
Warranty accrual	5,725	6,052
Other – net	13,044	12,167
Total deferred tax assets	67,249	66,606
Deferred income	(5,716)	(4,907)
Goodwill and other intangible assets	(87,146)	(79,471)
Prepaids	(9,271)	(7,876)
Tax over book depreciation	(70,946)	(59,308)
Total deferred tax liabilities	(173,079)	(151,562)
Valuation allowance	(4,159)	(3,978)
Total net deferred tax liabilities	109,989	88,934
DEFERRED INCOME TAXES	719	0
Total net deferred tax liabilities	$ (110,708)	$ (88,934)