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The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":17533,"source":{"system":"sec-edgar","filing":"0000886346-18-000010","document":"wf-form4_151508256143851.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634618000010/wf-form4_151508256143851.xml","form_type":"4"}},{"id":4108944,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2018-01-04T16:16:15.000Z","date":"2018-01-02","kind":"exercise","acquired":true,"shares":4000,"price":14.17,"value":56680.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."}],"balance_after":19257,"source":{"system":"sec-edgar","filing":"0000886346-18-000010","document":"wf-form4_151508256143851.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634618000010/wf-form4_151508256143851.xml","form_type":"4"}},{"id":4173643,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":2185,"price":113,"value":246905.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."}],"balance_after":15257,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173642,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":100,"price":111.55,"value":11155.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."}],"balance_after":17442,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173641,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":500,"price":110.915,"value":55457.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Represents the weighted average sale price.  The actual sales prices range from $110.35 to $111.10 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":17542,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173640,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":400,"price":109.4875,"value":43795.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents the weighted average sale price.  The actual sales prices range from $109.30 to $109.90 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":18042,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173639,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":400,"price":108.0998,"value":43239.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Represents the weighted average sale price.  The actual sales prices range from $107.75 to $108.55 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":18442,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173638,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":500,"price":106.9,"value":53450.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Represents the weighted average sale price.  The actual sales prices range from $106.45 to $107.25 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":18842,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173637,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":100,"price":105.3,"value":10530.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."}],"balance_after":19342,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173636,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":1500,"price":104.5733,"value":156859.95,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Represents the weighted average sale price.  The actual sales prices range from $104.10 to $105.00 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":19442,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4173635,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Common Stock","published_at":"2017-11-03T20:17:50.000Z","date":"2017-11-01","kind":"sale","acquired":false,"shares":752,"price":103.808,"value":78063.616,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported on this Form 4 were executed pursuant to a Rule 10-b-5-1 trading plan adopted August 31, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents the weighted average sale price.  The actual sales prices range from $103.05 to $104.00 per share.  The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request."}],"balance_after":20942,"source":{"system":"sec-edgar","filing":"0000886346-17-000148","document":"wf-form4_150974025616523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000148/wf-form4_150974025616523.xml","form_type":"4"}},{"id":4203645,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Restricted Stock Unit","published_at":"2017-09-22T15:46:23.000Z","date":"2017-03-08","kind":"grant","acquired":true,"shares":597,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This RSU vests and becomes exercisable in three annual installments beginning on March 10, 2018, provided the reporting person is employed by the Issuer on the vesting date."}],"balance_after":597,"derivative":{"exercise_price":0,"expiration_date":"2020-04-30","underlying":"Common Stock","underlying_shares":597},"source":{"system":"sec-edgar","filing":"0000886346-17-000125","document":"wf-form4a_150609516880214.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634617000125/wf-form4a_150609516880214.xml","form_type":"4/A","original_submission_date":"2017-03-10"}},{"id":4203644,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":165275,"kind":"person","name":"LAMBERT SANDRA L","position":1,"cik":"0001247563","reported_name":"LAMBERT SANDRA L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, GENERAL COUNSEL, SECRETARY"}}],"security":"Restricted Stock Unit","published_at":"2017-09-22T15:46:23.000Z","date":"2017-03-08","kind":"grant","acquired":true,"shares":2389,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of the issuer's common stock. 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