Discontinued Operations - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 01, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets	$ 65,583,000	$ 26,957,000
Provision (benefit) for income taxes	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]
Consideration paid at closing				$ 120,000,000.0
Contingent consideration, maximum consideration receivable	80,000,000.0
Net revenue payments received	0
Assets	0	0	0
Liabilities	0	0	0
Provision (benefit) for income taxes	$ 0	$ 0	$ (2,095,000)