SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Aggregate cost for federal Income tax purposes	$ 4,400,000
Accumulated tax depreciation	323,000
Aggregate cost for federal income tax purposes, net of accumulated tax depreciation	4,100,000
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance as of the beginning of the year	3,809,609	$ 2,606,536	$ 1,424,894
Acquisitions	235,232	1,207,098	1,170,593
Additions	8,821	12,243	11,049
Impairment	0	(965)	0
Dispositions	(181,950)	(15,303)	0
Balance as of the end of the year	3,871,712	3,809,609	2,606,536
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance as of the beginning of the year	201,527	118,609	61,242
Depreciation	106,300	87,531	57,367
Dispositions	(24,332)	(4,613)	0
Balance as of the end of the year	$ 283,495	$ 201,527	$ 118,609