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Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 | Jun. 29, 2013
Amounts Attributable to Kadant [Abstract] |  |  |  |
Income from Continuing Operations | $ 7,867 | $ 5,772 | $ 12,925 | $ 11,085
Loss from Discontinued Operation | (9) | (12) | (14) | (41)
Net Income Attributable to Kadant | $ 7,858 | $ 5,760 | $ 12,911 | $ 11,044
Basic Weighted Average Shares (in shares) | 11,049,000 | 11,178,000 | 11,091,000 | 11,170,000
Effect of Stock Options, Restricted Stock Units and Employee Stock Purchase Plan (in shares) | 197,000 | 153,000 | 189,000 | 129,000
Diluted Weighted Average Shares (in shares) | 11,246,000 | 11,331,000 | 11,280,000 | 11,299,000
Basic Earnings Per Share [Abstract] |  |  |  |
Continuing operations (in dollars per share) | $ 0.71 | $ 0.52 | $ 1.17 | $ 0.99
Discontinued operation (in dollars per share) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00
Net Income per Basic Share (in dollars per share) | $ 0.71 | $ 0.52 | $ 1.16 | $ 0.99
Diluted Earnings Per Share [Abstract] |  |  |  |
Continuing operations (in dollars per share) | $ 0.70 | $ 0.51 | $ 1.15 | $ 0.98
Discontinued operation (in dollars per share) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00
Net Income per Diluted Share (in dollars per share) | $ 0.70 | $ 0.51 | $ 1.14 | $ 0.98
Stock Options [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) |  | 93,000 |  | 102,000
Restricted Stock Units (RSUs) [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 69,000 | 0 | 63,000 | 41,000

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