Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Business (Details) - segment	3 Months Ended		6 Months Ended		7 Months Ended	9 Months Ended
Business (Details) - segment	Mar. 31, 2017	Sep. 30, 2016	Dec. 31, 2017	Jun. 30, 2017	Jul. 26, 2016	Dec. 31, 2017	Dec. 31, 2013	Jan. 13, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	3	2	2	3	2	2
AIA Purchase Agreement
Business Acquisition [Line Items]
Ownership percentage in subsidiary							94.00%	86.00%