| Restructuring Activity (Tables) | 6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Jun. 30, 2015 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring and Related Activities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring activity and rollforward of restructuring liability | The following table presents the activity related to the plan, which is included in restructuring charges in the unaudited consolidated statements of operations: 
 The following table presents a rollforward of our restructuring liability as of June 30, 2015, which is included in accrued expenses and other current liabilities in the unaudited consolidated balance sheets: 
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- References No definition available. 
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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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