Related Party Transactions and Arrangements - Offering Fee Summary (Details)	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 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%
CCPT V [Member] | Selling Commissions [Member] | Class A Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	7.00%
CCPT V [Member] | Selling Commissions [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	3.00%
CCPT V [Member] | Dealer Manager Fees [Member] | Class A Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	2.00%
CCPT V [Member] | Dealer Manager Fees [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	2.00%
CCPT V [Member] | Annual Distribution and Stockholder Servicing Fee [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	1.00%	1.00%	0.80%
CCPT V [Member] | Annual Distribution and Stockholder Servicing Fee [Member] | Maximum [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	4.00%
INAV [Member] | Selling Commissions [Member] | Maximum [Member] | Advisor Class Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	3.75%
INAV [Member] | Dealer Manager Fees [Member] | Wrap Class Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	0.55%
INAV [Member] | Dealer Manager Fees [Member] | Advisor Class Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	0.55%
INAV [Member] | Dealer Manager Fees [Member] | Institutional Class Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	0.25%
INAV [Member] | Dealer Manager Fees [Member] | INAV Classes [Member]
Related Party Transaction [Line Items]
Daily accrual percentage of estimated per share NAV and payable monthly in arrears	0.27%
INAV [Member] | Annual Distribution and Stockholder Servicing Fee [Member] | Advisor Class Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	0.50%
CCIT III [Member] | Selling Commissions [Member] | Class A Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	7.00%
CCIT III [Member] | Selling Commissions [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	3.00%
CCIT III [Member] | Dealer Manager Fees [Member] | Class A Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	2.00%
CCIT III [Member] | Dealer Manager Fees [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	2.00%
CCIT III [Member] | Annual Distribution and Stockholder Servicing Fee [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	1.00%
CCIT III [Member] | Annual Distribution and Stockholder Servicing Fee [Member] | Maximum [Member] | Class T Shares [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage of gross offering proceeds	4.00%