Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Income Taxes [Line Items]
U.S. statutory rate	35.00%
Transition tax	$ 0
Loss carryforwards	38,800,000	$ 36,400,000
Undistributed earnings of foreign subsidiaries	124,800,000
Unrecognized tax benefits	1,200,000	1,400,000	$ 1,700,000	$ 2,400,000
Unrecognized tax benefits that would impact effective tax rate	1,000,000	$ 1,000,000	$ 1,100,000
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	100,000
General Business Tax Credit Carryforward
Income Taxes [Line Items]
General business credit carryforward	128,500,000
Foreign Tax Credit Carryforward
Income Taxes [Line Items]
General business credit carryforward	4,100,000
State Credit Carryforward
Income Taxes [Line Items]
General business credit carryforward	100,000
Pro Forma
Income Taxes [Line Items]
Potential repatriation of foreign earnings amount	$ 5,300,000