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Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 01, 2017 USD ($) Segment | Apr. 02, 2016 USD ($) | Dec. 31, 2016 USD ($)
Accounting Policies [Abstract] |  |  |
Number of reportable segments | Segment | 2 |  |
Business Acquisition [Line Items] |  |  |
Additional post-closing consideration | $ 165 | $ 0 |
Restricted Cash | $ 1,543 |  | $ 2,082
Banker's acceptance drafts, maturity period | 6 months |  |
Banker's acceptance drafts | $ 9,229 |  | $ 7,852
PAAL [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Additional post-closing consideration | $ 165 |  |

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