Nature of Operations and Summary of Significant Accounting Policies - Changes in the Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Year	$ 2,163	$ 2,198	$ 2,689
Provision charged to expense	453	379	246
Accounts recovered	0	0	15
Accounts written off	(128)	(205)	(590)
Currency translation	(93)	(209)	(162)
Balance at End of Year	$ 2,395	$ 2,163	$ 2,198