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Component: (Network and Table)
Network
00090 - Document - Document And Entity Information
(http://www.cdicorp.com/role/DocumentDocumentAndEntityInformation)
TableStatement [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000018396 (http://www.sec.gov/CIK)
Statement [Line Items]Period [Axis]
2011-01-01 - 2011-12-31
2012-02-24
2011-06-30
Class of Stock [Axis]Class of Stock [Axis]Class of Stock [Axis]
Class Of Stock [Domain]Common Class A [Member]Common Class B [Member]Class Of Stock [Domain]
Document Type
10-K 
 
 
 
Amendment Flag
false 
 
 
 
Document Period End Date
2011-12-31 
 
 
 
Document Fiscal Year Focus
2011 
 
 
 
Document Fiscal Period Focus
FY 
 
 
 
Entity Filer Category
Accelerated Filer 
 
 
 
Entity Registrant Name
CDI CORP 
 
 
 
Entity Central Index Key
0000018396 
 
 
 
Current Fiscal Year End Date
--12-31 
 
 
 
Entity Common Stock, Shares Outstanding
 
19,181,657  
0  
 
Entity Current Reporting Status
Yes 
 
 
 
Entity Voluntary Filers
No 
 
 
 
Entity Well-known Seasoned Issuer
No 
 
 
 
Entity Public Float
 
 
 
176,527,708