Nature of Operations and Basis of Presentation (Details)	3 Months Ended
Mar. 31, 2015 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Ownership percentage by parent	77.60%
Ownership percentage by public investors	22.40%

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

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