Segment and Geographic Information (Details Textual)	3 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2012 segments	Sep. 16, 2012 segments	Dec. 31, 2012 International [Member]	Dec. 31, 2011 International [Member]	Dec. 31, 2010 International [Member]
Segment Reporting Information [Line Items]
Number of Operating Segments	1	2
Entity-Wide Revenue, Geographic Region, Percentage			14.00%	14.00%	18.00%

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration