Segment Information - Assets for Reportable Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 11,155,977	$ 11,230,450
Same Store [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	9,893,148	9,975,880
Non-Same Store and Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,107,843	1,049,029
Corporate assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 154,986	$ 205,541