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The Company	9 Months Ended
The Company	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Hill International, Inc. (“Hill” or the “Company”) is a professional services firm that provides program management, project management, construction management and other consulting services primarily to the buildings, transportation, environmental, energy and industrial markets worldwide. Hill’s clients include the U.S. federal government, U.S. state and local governments, foreign governments and the private sector. All amounts included in the following Notes to the Consolidated Financial Statements are in thousands, unless otherwise indicated, except per share data.