Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Provision (benefit) for income taxes	$ 4,513,000	$ 4,262,000	$ 5,101,000
Unrecognized tax benefits	0	0	0
VEREIT Operating Partnership, L.P. [Member]
Segment Reporting Information [Line Items]
Provision (benefit) for income taxes	4,513,000	4,262,000	5,101,000
State and Local Jurisdiction [Member] | VEREIT Operating Partnership, L.P. [Member]
Segment Reporting Information [Line Items]
Provision (benefit) for income taxes	4,400,000	4,300,000	4,700,000
State and Local Jurisdiction [Member] | TRS Entity [Member]
Segment Reporting Information [Line Items]
Provision (benefit) for income taxes	$ 0	$ 0	$ 400,000