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Nature of Operations and Summary of Significant Accounting Policies - Warranty Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 02, 2016
Apr. 04, 2015
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at beginning of period $ 3,670 $ 3,875
Provision charged to income 560 408
Usage (526) (543)
Currency translation 81 (192)
Balance at end of period $ 3,785 $ 3,548