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Commitments and Contingencies (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Operating Leases [Abstract] |  |  |
Rent expense | $ 2,545,000 | $ 2,137,000 | $ 2,043,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |
2014 | 3,058,000 |  |
2015 | 2,015,000 |  |
2016 | 1,116,000 |  |
2017 | 396,000 |  |
2018 | 113,000 |  |
Thereafter | 20,000 |  |
Total future minimum payments | 6,718,000 |  |
Right of Recourse [Abstract] |  |  |
Banker's acceptance drafts with recourse | 5,688,000 |  |
Purchase Obligations [Abstract] |  |  |
Minimum purchase obligation 2014 | 600,000 |  |
Minimum purchase obligation 2015 | 600,000 |  |
Minimum purchase obligation 2016 | 0 |  |
Performance Obligations and Customer Deposit Guarantees [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Outstanding letters of credit and bank guarantees | $ 10,533,000 |  |

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