Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Current:
Federal	$ 18,963	$ 27,768	$ 22,738
State	3,740	5,258	4,623
Foreign	1,450	1,713	972
Current provision	24,153	34,739	28,333
Deferred:
Federal	18,167	15,348	13,692
State	2,533	2,217	2,013
Foreign	(1,580)	(540)	(262)
Deferred provision	19,120	17,025	15,443
Total income tax expense	$ 43,273	$ 51,764	$ 43,776