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The actual number of shares that was earned was calculated by comparing the Issuer's relative total shareholder return to the total shareholder return for each company comprising the Russell 3000 Index over a three-year performance period."},{"field":"shares","element":"transactionShares","label":"F6","text":"The reported number of securities represents 65.21% of the initial target number of shares subject to the performance stock unit award granted on March 10, 2014, which were earned based the Issuer's performance over the three-year performance period."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F6","text":"The reported number of securities represents 65.21% of the initial target number of shares subject to the performance stock unit award granted on March 10, 2014, which were earned based the Issuer's performance over the three-year performance period."}],"balance_after":0,"derivative":{"exercise_date":"2017-03-10","expiration_date":"2017-03-10","underlying":"Common Stock","underlying_shares":4693},"source":{"system":"sec-edgar","filing":"0001227654-17-000041","document":"wf-form4_148952795277912.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1227654/000122765417000041/wf-form4_148952795277912.xml","form_type":"4"}},{"id":4386027,"issuer":{"id":4940,"kind":"organization","name":"COMPASS MINERALS INTERNATIONAL INC","symbol":"CMP"},"owners":[{"id":135534,"kind":"person","name":"Malecha Francis Joseph","position":1,"cik":"0001567110","reported_name":"Malecha Francis Joseph","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2017-03-14T21:46:07.000Z","date":"2017-03-10","kind":"exercise","acquired":false,"shares":4366,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."}],"balance_after":0,"derivative":{"exercise_date":"2017-03-10","expiration_date":"2017-03-10","underlying":"Common Stock","underlying_shares":4366},"source":{"system":"sec-edgar","filing":"0001227654-17-000041","document":"wf-form4_148952795277912.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1227654/000122765417000041/wf-form4_148952795277912.xml","form_type":"4"}},{"id":4386026,"issuer":{"id":4940,"kind":"organization","name":"COMPASS MINERALS INTERNATIONAL INC","symbol":"CMP"},"owners":[{"id":135534,"kind":"person","name":"Malecha Francis Joseph","position":1,"cik":"0001567110","reported_name":"Malecha Francis Joseph","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-03-14T21:46:07.000Z","date":"2017-03-14","kind":"tax_withholding","acquired":false,"shares":4011,"price":68.59,"value":275114.49,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares sold to satisfy tax withholding obligations on the vesting and release of the restricted stock units and performance stock units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The 4,011 shares were traded in blocks at prices ranging from $68.10 to $70.00 per share. $68.59 is the weighted average sale price per share. Information regarding the number of shares sold at each separate price is available upon request by the SEC staff or any security holder of the Issuer."}],"balance_after":23856,"source":{"system":"sec-edgar","filing":"0001227654-17-000041","document":"wf-form4_148952795277912.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1227654/000122765417000041/wf-form4_148952795277912.xml","form_type":"4"}},{"id":4386025,"issuer":{"id":4940,"kind":"organization","name":"COMPASS MINERALS INTERNATIONAL INC","symbol":"CMP"},"owners":[{"id":135534,"kind":"person","name":"Malecha Francis Joseph","position":1,"cik":"0001567110","reported_name":"Malecha Francis Joseph","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-03-14T21:46:07.000Z","date":"2017-03-10","kind":"exercise","acquired":true,"shares":4693,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":27867,"source":{"system":"sec-edgar","filing":"0001227654-17-000041","document":"wf-form4_148952795277912.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1227654/000122765417000041/wf-form4_148952795277912.xml","form_type":"4"}},{"id":4386024,"issuer":{"id":4940,"kind":"organization","name":"COMPASS MINERALS INTERNATIONAL INC","symbol":"CMP"},"owners":[{"id":135534,"kind":"person","name":"Malecha Francis Joseph","position":1,"cik":"0001567110","reported_name":"Malecha Francis Joseph","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-03-14T21:46:07.000Z","date":"2017-03-10","kind":"exercise","acquired":true,"shares":4366,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":23174,"source":{"system":"sec-edgar","filing":"0001227654-17-000041","document":"wf-form4_148952795277912.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1227654/000122765417000041/wf-form4_148952795277912.xml","form_type":"4"}}]}