Retirement Plan	12 Months Ended
Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Retirement Plan	Retirement Plan The CDI Corporation 401(k) Saving Plan (the "Plan") is a defined contribution retirement plan maintained for the benefit of eligible employees and qualified under section 401(k) of the Internal Revenue Code. Eligible employees may make voluntary tax deferred contributions to the Plan and the Company, at its discretion, may make matching contributions subject to certain limitations. Participants are fully vested in their contributions and in the Company's matching contributions at all times except in certain limited instances. The Company recorded Plan expenses of $2.3 million, $2.7 million and $2.5 million for the years ended December 31, 2016, 2015 and 2014, respectively, in the consolidated statements of operations. Plan expenses are based on a formula using a percentage of compensation or an amount determined by the Board of Directors.

Retirement Plan

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

The CDI Corporation 401(k) Saving Plan (the "Plan") is a defined contribution retirement plan maintained for the benefit of eligible employees and qualified under section 401(k) of the Internal Revenue Code. Eligible employees may make voluntary tax deferred contributions to the Plan and the Company, at its discretion, may make matching contributions subject to certain limitations. Participants are fully vested in their contributions and in the Company's matching contributions at all times except in certain limited instances. The Company recorded Plan expenses of $2.3 million, $2.7 million and $2.5 million for the years ended December 31, 2016, 2015 and 2014, respectively, in the consolidated statements of operations. Plan expenses are based on a formula using a percentage of compensation or an amount determined by the Board of Directors.