Business and Organization (Details)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2017 segment	Jan. 29, 2015 Company Business
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of independent public companies \| Company			2
Number of independent operating businesses \| Business			2
Number of regional segments	3	3

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