Organization and Significant Accounting Policies, Basis of Presentation (Details)	5 Months Ended	7 Months Ended
Dec. 31, 2017	Jul. 18, 2017
Organization and Significant Accounting Policies [Abstract]
Percentage ownership before IPO		100.00%
Percentage ownership after IPO	68.00%

Percentage of subsidiary's or equity investee's stock owned by parent company before stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration