Segments - Schedule of Selected Balance Sheet Data for Each Reportable Segments Information (Details) - USD ($) $ in Thousands	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 8,917,661	[1]	$ 8,867,168	[1]	$ 8,794,143
New York [Member]
Segment Reporting Information [Line Items]
Total assets	5,511,061		5,617,344		5,702,288
Washington, D.C. [Member]
Segment Reporting Information [Line Items]
Total assets	693,408		1,075,350		1,082,093
San Francisco [Member]
Segment Reporting Information [Line Items]
Total assets	2,421,173		1,913,747		1,391,725
Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 292,019		$ 260,727		$ 618,037

[1] Represents the consolidated assets and liabilities of Paramount Group Operating Partnership LP, a Delaware limited partnership (the “Operating Partnership”). The Operating Partnership is a consolidated variable interest entity (“VIE”), of which we are the sole general partner and own approximately 90.7%, as of December 31, 2017. The assets and liabilities of the Operating Partnership, as of December 31, 2017, include $1,956,020 and $1,264,338 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 13, Variable Interest Entities.