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This transaction is also exempt pursuant to Rule 16b-3(c)."},{"field":"date","element":"transactionDate","label":"F2","text":"The Offering Period (as defined in the ESPP) ended on December 29, 2023, and the shares were acquired on the last business day of the Offering Period."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In accordance with the ESPP, these shares were purchase at a price not less than ninety-five percent (95%) of the per share fair market value of the Common Shares (as defined in the ESPP) as of December 29, 2023, the last trading day prior to the end of the Offering Period."}],"balance_after":6063,"source":{"system":"sec-edgar","filing":"0001225208-24-000074","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1362004/000122520824000074/doc4.xml","form_type":"4"}},{"id":1745578,"issuer":{"id":740,"kind":"organization","name":"ICF 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The reporting person undertakes to provide to ICF International, Inc., any security holder of ICF International, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4."}],"balance_after":4309,"source":{"system":"sec-edgar","filing":"0001225208-23-008181","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1362004/000122520823008181/doc4.xml","form_type":"4"}},{"id":1810677,"issuer":{"id":740,"kind":"organization","name":"ICF International, Inc.","symbol":"ICFI"},"owners":[{"id":95652,"kind":"person","name":"Lee Rodney Mark Jr.","position":1,"cik":"0001867853","reported_name":"Lee Rodney Mark Jr.","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common","published_at":"2023-08-10T21:01:23.000Z","date":"2023-08-09","kind":"sale","planned":false,"acquired":false,"shares":1000,"price":129.1488,"value":129148.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  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The reporting person undertakes to provide to ICF International, Inc., any security holder of ICF International, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4."}],"balance_after":6228,"source":{"system":"sec-edgar","filing":"0001225208-23-008181","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1362004/000122520823008181/doc4.xml","form_type":"4"}},{"id":1810676,"issuer":{"id":740,"kind":"organization","name":"ICF International, Inc.","symbol":"ICFI"},"owners":[{"id":95652,"kind":"person","name":"Lee Rodney Mark Jr.","position":1,"cik":"0001867853","reported_name":"Lee Rodney Mark Jr.","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common","published_at":"2023-08-10T21:01:23.000Z","date":"2023-08-09","kind":"sale","planned":false,"acquired":false,"shares":150,"price":129.4574,"value":19418.61,"ownership":{"direct":true},"balance_after":7228,"source":{"system":"sec-edgar","filing":"0001225208-23-008181","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1362004/000122520823008181/doc4.xml","form_type":"4"}},{"id":1810675,"issuer":{"id":740,"kind":"organization","name":"ICF International, Inc.","symbol":"ICFI"},"owners":[{"id":95652,"kind":"person","name":"Lee Rodney Mark Jr.","position":1,"cik":"0001867853","reported_name":"Lee Rodney Mark Jr.","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common","published_at":"2023-08-10T21:01:23.000Z","date":"2023-08-09","kind":"sale","planned":false,"acquired":false,"shares":100,"price":129.7041,"value":12970.41,"ownership":{"direct":true},"balance_after":7378,"source":{"system":"sec-edgar","filing":"0001225208-23-008181","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1362004/000122520823008181/doc4.xml","form_type":"4"}},{"id":1839393,"issuer":{"id":740,"kind":"organization","name":"ICF International, Inc.","symbol":"ICFI"},"owners":[{"id":95652,"kind":"person","name":"Lee Rodney Mark Jr.","position":1,"cik":"0001867853","reported_name":"Lee Rodney Mark Jr.","relationship":{"officer":true,"officer_title":"Executive Vice President"}}],"security":"Common","published_at":"2023-07-03T21:03:08.000Z","date":"2023-06-30","kind":"grant","planned":false,"acquired":true,"shares":138,"price":118.2679,"value":16320.9702,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the ICF International, Inc. 2006 Employee Stock Purchase Plan (the ESPP), for the ESPP purchase period of January 1, 2023 through June 30, 2023.  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