Discontinued Operations - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ (30)	$ 0	$ 224	$ 3,501	$ 0	$ 3,695	$ (19,117)
Cole Capital [Member] | Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Offering-related fees and reimbursements						1,027	16,096
Transaction service fees and reimbursements						334	13,929
Management fees and reimbursements						6,452	76,214
Total revenues						7,813	106,239
Cole Capital reallowed fees and commissions						602	9,879
Transaction costs						(654)	3,802
General and administrative						4,450	63,783
Amortization of intangible assets						0	14,490
Total operating expenses						4,398	91,954
Other income, net						0	464
Loss on disposition and assets held for sale						(1,815)	(20,027)
Income (loss) before taxes						1,600	(5,278)
Benefit from (provision for) income taxes						2,095	(13,839)
Income (loss) from discontinued operations, net of income taxes						$ 3,695	$ (19,117)