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Nature of Operations and Summary of Significant Accounting Policies (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 28, 2014 Segment | Jun. 29, 2013 | Dec. 28, 2013
Nature of Operations and Summary of Significant Accounting Policies [Abstract] |  |  |
Number of reportable segments | 2 |  |
Cash Flow, Noncash Investing Activities Disclosure [Abstract] |  |  |
Fair value of assets acquired | $ 5,602,000 | $ 22,812,000 |
Cash paid for acquired businesses | (3,444,000) | (15,332,000) |
Liabilities assumed of acquired businesses | 2,158,000 | 7,480,000 |
Cash Flow, Noncash Financing Activities Disclosure [Abstract] |  |  |
Issuance of Company Common Stock | 2,718,000 | 2,353,000 |
Dividends Declared but Unpaid | 1,640,000 | 1,395,000 |
Restricted Cash [Abstract] |  |  |
Restricted Cash | 167,000 |  | 168,000
Banker's Acceptance Drafts [Abstract] |  |  |
Banker's acceptance drafts | 9,267,000 |  | 10,765,000
Inventories [Abstract] |  |  |
Raw Materials and Supplies | 22,368,000 |  | 20,836,000
Work in Process | 16,587,000 |  | 21,051,000
Finished Goods | 21,132,000 |  | 20,918,000
Inventories | 60,087,000 |  | 62,805,000
Changes in the carrying amount of accrued warranty costs [Roll Forward] |  |  |
Balance at beginning of period | 4,571,000 | 4,462,000 |
Provision | 1,284,000 | 505,000 |
Usage | (1,600,000) | (996,000) |
Standard Product Warranty Accrual, Additions from Business Acquisition | 0 | 138,000 |
Currency translation | (6,000) | (44,000) |
Balance at end of period | $ 4,249,000 | $ 4,065,000 |

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