Discontinued Operations - Components of Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred
Total (benefit from) provision for income taxes - Cole Capital	$ 4,262,000	$ 5,101,000	$ 6,882,000
Cole Capital [Member] | Held-for-sale or Disposed of by Sale [Member]
Current
Federal		(74,000)	(120,000)
State		(166,000)	602,000
Total current (benefit from) provision for income taxes		(240,000)	482,000
Deferred
Federal		(1,756,000)	12,016,000
State		(99,000)	1,341,000
Total deferred (benefit from) provision for income taxes		(1,855,000)	13,357,000
Total (benefit from) provision for income taxes - Cole Capital	$ 0	$ (2,095,000)	$ 13,839,000