Amount of fees earned from providing investment advice and research to customers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(a),(d))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

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Amount of premium revenue earned.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-16)
-URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915

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Related Party Revenue Fees Earned by and Expenses Reimbursable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Total advisory revenue	$ 4,042
Total property management revenue	8,156	$ 0	$ 0
Insurance premiums	206
REIT II
Related Party Transaction [Line Items]
Total advisory revenue	3,238
Insurance premiums	206
REIT III
Related Party Transaction [Line Items]
Total advisory revenue	650
Insurance premiums	0
Necessity Retail Partners
Related Party Transaction [Line Items]
Total advisory revenue	105
Insurance premiums	0
Other Parties
Related Party Transaction [Line Items]
Total advisory revenue	49
Insurance premiums	0
Acquisition Fees
Related Party Transaction [Line Items]
Revenue from related parties	737
Acquisition Fees \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	218
Acquisition Fees \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	519
Acquisition Fees \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	0
Acquisition Fees \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	0
Asset Management Fees
Related Party Transaction [Line Items]
Revenue from related parties	3,091
Asset Management Fees \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	2,878
Asset Management Fees \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	59
Asset Management Fees \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	105
Asset Management Fees \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	49
Due Diligence Reimbursements
Related Party Transaction [Line Items]
Revenue from related parties	214
Due Diligence Reimbursements \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	142
Due Diligence Reimbursements \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	72
Due Diligence Reimbursements \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	0
Due Diligence Reimbursements \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	0
Property Management Fees
Related Party Transaction [Line Items]
Revenue from related parties	1,790
Property Management Fees \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	1,518
Property Management Fees \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	15
Property Management Fees \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	230
Property Management Fees \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	27
Leasing Commissions
Related Party Transaction [Line Items]
Revenue from related parties	1,009
Leasing Commissions \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	782
Leasing Commissions \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	15
Leasing Commissions \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	196
Leasing Commissions \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	16
Construction Management Fees
Related Party Transaction [Line Items]
Revenue from related parties	412
Construction Management Fees \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	365
Construction Management Fees \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	4
Construction Management Fees \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	36
Construction Management Fees \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	7
Expenses and Reimbursements
Related Party Transaction [Line Items]
Revenue from related parties	550
Expenses and Reimbursements \| REIT II
Related Party Transaction [Line Items]
Revenue from related parties	339
Expenses and Reimbursements \| REIT III
Related Party Transaction [Line Items]
Revenue from related parties	69
Expenses and Reimbursements \| Necessity Retail Partners
Related Party Transaction [Line Items]
Revenue from related parties	65
Expenses and Reimbursements \| Other Parties
Related Party Transaction [Line Items]
Revenue from related parties	77
Property Management Agreement
Related Party Transaction [Line Items]
Total property management revenue	3,761
Property Management Agreement \| REIT II
Related Party Transaction [Line Items]
Total property management revenue	3,004
Property Management Agreement \| REIT III
Related Party Transaction [Line Items]
Total property management revenue	103
Property Management Agreement \| Necessity Retail Partners
Related Party Transaction [Line Items]
Total property management revenue	527
Property Management Agreement \| Other Parties
Related Party Transaction [Line Items]
Total property management revenue	$ 127