Summary of Significant Accounting Policies (Product Warranties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Product Warranty Accrual [Roll Forward]
Balance at the beginning of the period	$ 16,227	$ 16,719	$ 13,840
Accrual assumed from acquisition	0	0	1,100
Accrual settled from divestiture	(538)	0	0
Accruals for warranties issued during the period	20,055	19,995	18,951
Accrual (Recovery) related to pre-existing warranties	604	(334)	172
Settlements made during the period	(21,098)	(20,153)	(17,344)
Balance at the end of the period	$ 15,250	$ 16,227	$ 16,719