Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Ground lease liability	$ 58,958	$ 59,379
Prepaid rent	29,242	33,428
Security deposits	13,257	13,545
Restricted stock unit liability	8,393	16,592
Other liabilities	5,312	11,184
Total other liabilities	$ 115,162	$ 134,128