Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Intangible Assets [Abstract]
Goodwill impairment	$ 0	$ 0	$ 0
Impairment of indefinite-lived intangible assets	0	0	0
Aggregate amortization of intangible assets	$ 1,480	$ 1,500	$ 900