Transaction Related Costs, Impairment Losses and Other - Schedule of Transaction Related Costs, Impairment Losses and Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Transaction Related Costs, Impairment Losses and Other [Line Items]
Non-cash impairment loss and related write-offs	$ 101,925	$ 12,000	$ 0
Transaction related costs	4,613	6,217	1,776
Transfer tax	0	13,103	0
Transaction Related Costs, Impairment Losses and Other	$ 106,538	$ 31,320	$ 1,776
Independence Plaza
Transaction Related Costs, Impairment Losses and Other [Line Items]
Equity method ownership percentage	50.10%