Other Assets, Net Lease and Other Intangible Asset Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization of Intangible Assets	$ 15,953	$ 21,561	$ 14,954
In-place lease amortization (1)
Amortization of Intangible Assets	7,375	11,807	10,216
Above-market real estate lease amortization (2)
Amortization of Intangible Assets	1,730	2,390	1,428
Below-market ground lease amortization (3)
Amortization of Intangible Assets	0	85	87
Management and leasing contract amortization (1)
Amortization of Intangible Assets	7,088	7,088	3,209
Other amortization (1)
Amortization of Intangible Assets	$ (240)	$ 191	$ 14