Related Party Arrangements - Summary of Fees for Services Rendered Expected to be Settled in Restricted Stock (Parenthetical) (Details)	9 Months Ended
Sep. 30, 2018 USD ($)
Related Party Transactions [Abstract]
Restricted stock fair value	$ 0

The total fair value of shares issued during the period under a deferred compensation arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Name:	us-gaap_DeferredCompensationArrangementWithIndividualFairValueOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration