Summary of Significant Accounting Policies - Supplemental Cash Flow Items (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Supplemental Disclosures of Cash Flow Information
Interest paid	$ 5,283	$ 24,066
Taxes paid	5,539	1,150
Non-cash activities:
Purchases of property and equipment not paid	$ 687	$ 957