Segments - Schedule of Selected Balance Sheet Data for Each Reportable Segments Information (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	[1]	$ 8,924,008	$ 8,867,168
Total liabilities	[1]	3,881,852	3,981,221
Total equity		5,042,156	$ 4,885,947	$ 4,862,290	$ 4,959,515
New York [Member]
Segment Reporting Information [Line Items]
Total assets		5,557,850
Total liabilities		2,445,559
Total equity		3,112,291
Washington, D.C. [Member]
Segment Reporting Information [Line Items]
Total assets		701,624
Total liabilities		26,829
Total equity		674,795
San Francisco [Member]
Segment Reporting Information [Line Items]
Total assets		2,438,720
Total liabilities		1,289,218
Total equity		1,149,502
Other [Member]
Segment Reporting Information [Line Items]
Total assets		225,814
Total liabilities		120,246
Total equity		$ 105,568

[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 90.6% as of September 30, 2017. The assets and liabilities of the Operating Partnership, as of September 30, 2017, include $1,970,149 and $1,272,907 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 13, Variable Interest Entities.