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Unaudited Quarterly Information - Summary of Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2016 | Oct. 03, 2015 | Jul. 04, 2015 | Apr. 04, 2015 | Jan. 03, 2015 | Sep. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 107,600 | $ 91,929 | $ 98,327 | $ 92,251 | $ 105,206 | $ 98,719 | $ 104,835 | $ 93,367 | $ 390,107 | $ 402,127 | $ 344,499
Gross Profit | 46,393 | 43,668 | 45,727 | 44,337 | 46,999 | 44,112 | 45,082 | 42,180 |  |  |
Amounts Attributable to Kadant: |  |  |  |  |  |  |  |  |  |  |
Income from Continuing Operations | 10,367 | 8,647 | 8,469 | 6,832 | 9,106 | 6,651 | 7,867 | 5,058 | 34,315 | 28,682 | 23,481
Income (Loss) from Discontinued Operation | 18 | (4) | (5) | 65 | (5) | (4) | (9) | (5) | 74 | (23) | (62)
Net Income Attributable to Kadant | $ 10,385 | $ 8,643 | $ 8,464 | $ 6,897 | $ 9,101 | $ 6,647 | $ 7,858 | $ 5,053 | $ 34,389 | $ 28,659 | $ 23,419
Basic Earnings per Share: |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) | $ 0.96 | $ 0.80 | $ 0.77 | $ 0.63 | $ 0.84 | $ 0.61 | $ 0.71 | $ 0.45 | $ 3.16 | $ 2.61 | $ 2.11
Net Income Attributable to Kadant (in dollars per share) | 0.96 | 0.80 | 0.77 | 0.63 | 0.84 | 0.61 | 0.71 | 0.45 | 3.16 | 2.61 | 2.10
Diluted Earnings per Share: |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) | 0.94 | 0.78 | 0.76 | 0.62 | 0.82 | 0.60 | 0.70 | 0.45 | 3.09 | 2.56 | 2.07
Net Income Attributable to Kadant (in dollars per share) | 0.94 | 0.78 | 0.76 | 0.62 | 0.82 | 0.60 | 0.70 | 0.45 | 3.10 | 2.56 | 2.07
Cash Dividends Declared per Common Share (in dollars per share) | $ 0.17 | $ 0.17 | $ 0.17 | $ 0.17 | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.68 | $ 0.60 | $ 0.50

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