Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Accounting Policies [Abstract]
Cash Paid for Interest	$ 616	$ 1,081	$ 961
Cash Paid for Income Taxes, Net of Refunds	11,497	10,035	8,375
Non-Cash Investing Activities:
Fair Value of Assets Acquired	0	14,771	88,398
Cash Paid for Acquired Businesses	0	(12,658)	(67,453)
Liabilities Assumed of Acquired Businesses	0	2,113	20,945
Non-Cash Financing Activities:
Issuance of Company Common Stock	3,423	3,220	2,677
Dividends Declared but Unpaid	$ 1,831	$ 1,630	$ 1,389