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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 USD ($)
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | $ 353,510
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 268,001
Acquisitions | (357)
Currency translation | (6,156)
Total 2018 adjustments | (6,513)
Gross Balance, Ending Balance | 346,997
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 261,488
Operating Segment [Member] | Papermaking Systems [Member] |
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | 247,014
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 161,505
Acquisitions | (282)
Currency translation | (3,280)
Total 2018 adjustments | (3,562)
Gross Balance, Ending Balance | 243,452
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 157,943
Operating Segment [Member] | Wood Processing Systems [Member] |
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | 106,496
Accumulated impairment losses | 0
Net Balance, Beginning Balance | 106,496
Acquisitions | (75)
Currency translation | (2,876)
Total 2018 adjustments | (2,951)
Gross Balance, Ending Balance | 103,545
Accumulated impairment losses | 0
Net Balance, Ending Balance | $ 103,545

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