Summary of Significant Accounting Policies - Prior Period Correction (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 17, 2020	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated depreciation and amortization		$ 4,002,377		$ 4,002,377				$ 3,833,084
Accumulated deficit		(6,692,338)		(6,692,338)				(6,617,380)
Depreciation and amortization		$ 106,668	$ 108,257	$ 320,582	$ 341,070
Basic net income per share attributable to common stockholders (in dollars per share) | $ / shares		$ 0.25	$ 0.41	$ 1.06	$ 0.95
Diluted net income per share attributable to common stockholders (in dollars per share) | $ / shares		$ 0.25	$ 0.41	$ 1.06	$ 0.95
Stockholders' equity, including portion attributable to noncontrolling interest		$ 6,302,739	$ 6,485,460	$ 6,302,739	$ 6,485,460	$ 6,720,006	$ 6,750,214	6,842,216	$ 6,680,061	$ 6,718,031	$ 6,870,194
Retained Deficit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity, including portion attributable to noncontrolling interest		(6,692,338)	(6,484,455)	(6,692,338)	(6,484,455)	(6,644,896)	(6,610,678)	(6,617,380)	(6,488,521)	(6,448,652)	(6,372,710)
Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock split, conversion ratio	0.2
Stockholders' equity, including portion attributable to noncontrolling interest		2,292	2,183	2,292	2,183	2,291	2,291	2,289	2,156	2,155	2,153
VEREIT Operating Partnership, L.P. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated depreciation and amortization		4,002,377		4,002,377				3,833,084
Depreciation and amortization		106,668	108,257	320,582	341,070
Partners' capital, including portion attributable to noncontrolling interest		6,302,739	6,485,460	6,302,739	6,485,460	6,720,006	6,750,214	6,842,216	6,680,061	6,718,031	6,870,194
VEREIT Operating Partnership, L.P. [Member] | Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
General Partners' capital account		6,296,943		6,296,943				6,580,752
VEREIT Operating Partnership, L.P. [Member] | General Partner [Member] | Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Partners' capital, including portion attributable to noncontrolling interest		$ 6,296,943	6,354,523	$ 6,296,943	6,354,523	$ 6,571,413	$ 6,595,269	6,580,752	$ 6,238,150	$ 6,263,116	6,402,155
Correction [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated depreciation and amortization								(30,600)
Accumulated deficit								(30,600)
Depreciation and amortization			$ (900)		$ (2,800)
Correction [Member] | Retained Deficit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity, including portion attributable to noncontrolling interest								(30,600)			(26,900)
Correction [Member] | VEREIT Operating Partnership, L.P. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated depreciation and amortization								(30,600)
Accumulated deficit								(30,600)
Correction [Member] | VEREIT Operating Partnership, L.P. [Member] | Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
General Partners' capital account								30,600
Correction [Member] | VEREIT Operating Partnership, L.P. [Member] | General Partner [Member] | Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Partners' capital, including portion attributable to noncontrolling interest								$ 30,600			$ 26,900
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic net income per share attributable to common stockholders (in dollars per share) | $ / shares			$ 0.40
Diluted net income per share attributable to common stockholders (in dollars per share) | $ / shares			$ 0.40