Leases - Summary of Right-of-Use Assets and Related Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Operating Leased Assets [Line Items]
Right-of-use assets	$ 499,287	$ 512,774	$ 434,200
Lease liabilities	329,130	331,334	$ 278,300
Corporate Office Leases [Member]
Operating Leased Assets [Line Items]
Right-of-use assets	39,203	41,596
Lease liabilities	40,470	43,105
Ground Leases [Member]
Operating Leased Assets [Line Items]
Right-of-use assets	402,500	413,196
Finance lease, right-of-use asset	57,584	57,982
Lease liabilities	265,310	264,990
Finance lease, liabilities	$ 23,350	$ 23,239