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Nature of Operations and Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 USD ($)
Goodwill [Roll Forward] |
Gross Balance, Beginning Balance | $ 236,964
Accumulated impairment losses | (85,509)
Net Balance, Beginning Balance | 151,455
Acquisitions | 99,883
Currency translation | 13,502
Total 2017 adjustments | 113,385
Gross Balance, Ending Balance | 350,349
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 264,840
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
Acquisitions | 15,277
Currency translation | 9,937
Total 2017 adjustments | 25,214
Gross Balance, Ending Balance | 244,913
Accumulated impairment losses | (85,509)
Net Balance, Ending Balance | 159,404
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
Acquisitions | 84,606
Currency translation | 3,565
Total 2017 adjustments | 88,171
Gross Balance, Ending Balance | 105,436
Accumulated impairment losses | 0
Net Balance, Ending Balance | $ 105,436

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