Discontinued Operations - Effective Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total benefit from income taxes - Cole Capital	$ 4,513,000	$ 4,262,000	$ 5,101,000
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]
Income before taxes			1,600,000
Less: Income from non-taxable entities			(685,000)
Income attributable to taxable subsidiaries before income taxes			915,000
Federal benefit from income taxes at statutory rate			192,000
Nondeductible portion of transaction costs and loss recognized on classification as held for sale			(719,000)
Impact of valuation allowance			(1,158,000)
State income taxes and other			(410,000)
Total benefit from income taxes - Cole Capital	$ 0	$ 0	$ (2,095,000)