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Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Segment	Apr. 01, 2017 USD ($)	Jan. 01, 2018 USD ($)	Dec. 30, 2017 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | Segment	2
Banker's acceptance drafts, maturity period	6 months
Banker's acceptance drafts	$ 12,021			$ 15,960
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to increase retained earnings	351,355			342,893
Reclassification from operating income	16,664	$ 12,250
Reclassification to other expense, net	$ 246	204
Future lease payments due after next fiscal year				$ 8,100
ASU No. 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment to increase retained earnings			$ 119
ASU No. 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from operating income		(204)
Reclassification to other expense, net		$ 204
Timing Of Transfer Of Good Or Service [Member] | Point in Time [Member] | Revenue from Contract with Customer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk percentage	95.00%
Timing Of Transfer Of Good Or Service [Member] | Over Time [Member] | Revenue from Contract with Customer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk percentage	5.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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