Schedule III- Real Estate and Accumulated Depreciation Schedule III - Real Estate and Accumulated Depreciation - Rollforward of Carrying Amount of Real Estate Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance as of the beginning of the year	$ 6,269,023	$ 6,316,143	$ 3,853,042
Acquisitions	505,424	16,353	2,447,896
Additions	90,859	126,379	86,723
Dispositions	(27,906)	(180,965)	(57,596)
Impairments	0	(8,887)	(13,922)
Balance as of the end of the year	6,837,400	6,269,023	6,316,143
Lease intangibles	628,066	$ 599,864	$ 639,200
Federal income tax basis	$ 6,700,000