Schedule III - Real Estate and Accumulated Depreciation - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Land and Buildings and Improvements
Balance at beginning of period	$ 6,165,296	$ 3,725,932
Add: Acquisitions	0	2,539,854	$ 0
Add: Improvements	109,403	60,916	40,308
Less: Disposition of properties	(370,793)	(161,406)	(256,789)
Balance at end of period	5,903,906	6,165,296	3,725,932
Reconciliation of Accumulated Depreciation
Balance at beginning of period	(628,518)	(520,517)
Add: Depreciation for the period	(143,215)	(108,986)	(91,400)
Less: Disposition of properties	12,090	985	35,574
Balance at end of period	$ (759,643)	$ (628,518)	$ (520,517)