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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | $ 353,510
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 268,001
Acquisitions | (384)
Currency translation | 1,897
Total 2018 adjustments | 1,513
Gross Balance, Ending Balance | 355,023
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 269,514
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 | (309)
Currency translation | 2,131
Total 2018 adjustments | 1,822
Gross Balance, Ending Balance | 248,836
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 163,327
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 | (234)
Total 2018 adjustments | (309)
Gross Balance, Ending Balance | 106,187
Accumulated impairment losses | 0
Net Balance, Ending Balance | $ 106,187

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