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v3.7.0.1

Subsequent Event - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2017 | Jul. 02, 2016 | Jul. 01, 2017 | Jul. 02, 2016
Pro Forma Information |  |  |  |
Nonrecurring adjustments | $ 8,096 | $ 8,311 | $ 17,047 | $ 15,187
NII FPG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Revenues |  |  | 252,842 | 245,548
Net Income Attributable to Kadant |  |  | $ 24,010 | $ 9,488
Earnings per Share Attributable to Kadant: |  |  |  |
Basic (in dollars per share) |  |  | $ 2.19 | $ 0.88
Diluted (in dollars per share) |  |  | $ 2.13 | $ 0.86
NII FPG [Member] | Acquisition-related transaction costs [Member] |  |  |  |
Pro Forma Information |  |  |  |
Nonrecurring adjustments |  |  | $ 4,417 | $ (4,417)
NII FPG [Member] | Inventory revalued [Member] |  |  |  |
Pro Forma Information |  |  |  |
Nonrecurring adjustments |  |  |  | (5,822)
NII FPG [Member] | Intangible amortization related to acquired backlog [Member] |  |  |  |
Pro Forma Information |  |  |  |
Nonrecurring adjustments |  |  |  | $ (1,170)
NII FPG [Member] | Gain on sale of a building [Member] |  |  |  |
Pro Forma Information |  |  |  |
Nonrecurring adjustments |  |  | $ (852) |

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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