Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Accounting Policies [Abstract]
Cash Paid for Interest	$ 2,624	$ 1,183	$ 616
Cash Paid for Income Taxes, Net of Refunds	20,559	15,632	11,497
Non-Cash Investing Activities:
Fair value of assets of acquired	242,048	84,969	0
Cash paid for acquired businesses	(206,950)	(58,894)	0
Liabilities assumed of acquired businesses	35,098	26,075	0
Non-cash purchases of property, plant, and equipment	4,620	379	614
Non-Cash Financing Activities:
Issuance of Company common stock upon vesting of RSUs	3,192	3,463	3,423
Dividends declared but unpaid	$ 2,316	$ 2,078	$ 1,831