Related Party Transactions and Arrangements - Offering-Related Revenue Narrative (Details)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cole REITs [Member] \| Selling commissions allowable [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	100.00%	100.00%	100.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration