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Business	9 Months Ended
Business	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business CDI Corp. and its Subsidiaries (the “Company” or “CDI”) are an integrated engineering and technology services organization providing client-focused solutions in select global industries. The Company derives most of its revenue by providing these services to large and mid-sized companies located primarily in the United States (“U.S.”), Canada and the United Kingdom (“UK”).