Dispositions of Real Estate and Discontinued Operations - Schedule of Results of Discontinued Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization	$ 0	$ 0	$ (4,890,000)
Income tax benefit (expense)	0	$ 0	$ (48,181,000)
QCP | Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental and related revenues	24,204,000
Income from direct financing leases	384,752,000
Total revenues	408,956,000
Depreciation and amortization	(4,892,000)
Operating	(3,367,000)
General and administrative	(67,000)
Transaction costs	(86,765,000)
Other income (expense), net	71,000
Income (loss) before income taxes and income from impairments of equity method investments	313,936,000
Income tax benefit (expense)	(48,181,000)
Total discontinued operations	$ 265,755,000