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Nature of Business	9 Months Ended
Nature of Business	Sep. 30, 2011
Nature of Business [Abstract]
Nature of Business	1. Nature of Business Carbonite, Inc. (the “Company”) was incorporated in the state of Delaware on February 10, 2005, and focuses on the development and marketing of personal computer backup services that enables users to backup, access, and restore data files online. The Company views its operations and manages its business in one operating segment.