Related Party Transactions and Arrangements - Management Service Revenue (Details)	Sep. 30, 2017
CCPT V [Member]
Related Party Transaction [Line Items]
Threshold for return on stockholders' capital	6.00%
CCPT V [Member] | Asset Management / Advisory Fees [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.65%
CCPT V [Member] | Asset Management / Advisory Fees [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.75%
INAV [Member]
Related Party Transaction [Line Items]
Threshold for return on stockholders' capital	6.00%
INAV [Member] | Asset Management / Advisory Fees [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.90%
INAV [Member] | Performance Fees [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	25.00%
Percent of aggregate total return for any individual year	10.00%
CCIT III [Member]
Related Party Transaction [Line Items]
Threshold for return on stockholders' capital	6.00%
CCIT III [Member] | Asset Management / Advisory Fees [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.65%
CCIT III [Member] | Asset Management / Advisory Fees [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.75%
CCIT II [Member]
Related Party Transaction [Line Items]
Threshold for return on stockholders' capital	8.00%
CCIT II [Member] | Asset Management / Advisory Fees [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.65%
CCIT II [Member] | Asset Management / Advisory Fees [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.75%
CCPT IV [Member]
Related Party Transaction [Line Items]
Threshold for return on stockholders' capital	8.00%
CCPT IV [Member] | Asset Management / Advisory Fees [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.65%
CCPT IV [Member] | Asset Management / Advisory Fees [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Revenue from related party, percentage	0.75%