Segment Reporting - Narrative (Details) - Segment			3 Months Ended	12 Months Ended
Mar. 15, 2016	Mar. 14, 2016	Mar. 31, 2016	Dec. 31, 2017
Segment Reporting [Abstract]
Number of reportable segments	1	2	2	1

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