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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands | 6 Months Ended
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Jul. 01, 2017 USD ($)
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | $ 236,964
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 151,455
Currency Translation | 7,372
Total 2017 Adjustments | 7,372
Gross Balance, Ending Balance | 244,336
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 158,827
Operating Segment [Member] | Papermaking Systems [Member] |
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | 219,699
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 134,190
Currency Translation | 6,704
Total 2017 Adjustments | 6,704
Gross Balance, Ending Balance | 226,403
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 140,894
Operating Segment [Member] | Wood Processing Systems [Member] |
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | 17,265
Accumulated impairment losses | 0
Net Balance, Beginning Balance | 17,265
Currency Translation | 668
Total 2017 Adjustments | 668
Gross Balance, Ending Balance | 17,933
Accumulated impairment losses | 0
Net Balance, Ending Balance | $ 17,933

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