Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Subsequent Events [Abstract]
Restructuring and Related Activities, Description	In the second quarter of 2013, the Company initiated restructuring plans primarily relating to its U.K. development team and the closure of its New York sales office. The Company expects to reduce its U.K. workforce by approximately 10%, which is less than 1% of the Company’s total workforce. The amounts to be recorded are expected to be approximately $2 million, primarily relating to termination and severance costs.
Severance Costs	$ 2

Description of a specific restructuring plan and related activities including the facts and circumstances leading to the restructuring or decision to exit an activity, and the expected completion date. This concept and related items would be utilized for each plan if multiple exit plans have been implemented in the period.

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The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

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