The Company and Financial Statement Presentation - Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Real estate, net	$ 3,178,846	$ 3,309,900
Total assets	3,411,996	3,553,020
Mortgages and notes payable, net	682,994	689,810
Total liabilities	2,137,612	2,212,185
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Real estate, net	650,084	682,587
Total assets	698,201	766,025
Mortgages and notes payable, net	212,965	212,792
Total liabilities	$ 220,940	$ 226,331