Short-Term Borrowings	3 Months Ended
Short-Term Borrowings	Mar. 31, 2013
Short-term Debt [Abstract]
Short-Term Borrowings	Short-Term Borrowings On November 30, 2012, CDI Corp., its direct wholly-owned subsidiary, CDI Corporation, and its indirect subsidiary, CDI AndersElite Limited (each a “Borrower”), entered into a Credit Agreement (the “Credit Agreement”) with Bank of America, N.A. (the “Bank”). The Credit Agreement established a $75.0 million revolving line of credit facility (including a $5.0 million UK overdraft facility) that expires on November 29, 2017. The Company intends to repay outstanding borrowings under the Credit Agreement during 2013 and as a result has recorded these borrowings in "Short-term borrowings" in the consolidated balance sheets. Borrowings under this line of credit may be used by the Company and the other Borrowers for general business purposes or for letters of credit. At March 31, 2013, the Company had no borrowings, letters of credit outstanding of $3.1 million and $71.9 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of March 31, 2013. As of December 31, 2012, the Company had outstanding borrowings of $2.8 million, letters of credit outstanding of $3.1 million and $69.1 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of December 31, 2012. The Company's credit agreement with JPMorgan Chase Bank, N.A. expired on November 30, 2012. Upon expiration, the Company entered into a letter agreement with JPMorgan Chase Bank, N.A. to keep in effect an existing standby letter of credit that expires July 1, 2013. The Company provided cash in the amount of $0.4 million to fully collateralize the standby letter of credit, which is recorded in "Prepaid expenses and other current assets" in the consolidated balance sheets as of March 31, 2013 and December 31, 2012.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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