Investments in Unconsolidated Joint Ventures - Summary of Financial Information of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Total assets	[1]	$ 8,571,948		$ 8,554,097
Total liabilities	[1]	4,066,013		4,038,363
Equity		3,628,473		3,653,177
Total liabilities and equity		8,571,948		8,554,097
Rental revenue		173,146	$ 175,425
Other income		1,350	2,231
Total revenues		181,166	183,986
Operating		66,618	67,014
Depreciation and amortization		58,305	58,427
Total expenses		139,568	137,893
Interest and other income (loss), net		1,302	(996)
Interest and debt expense		(34,739)	(36,619)
Net loss before income taxes		3,025	4,309
Income tax expense		(1,141)	(604)
Net (loss) income attributable to common stockholders		(3,578)	3,348
Unconsolidated Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Real estate, net		2,690,006		2,674,858
Cash and cash equivalents and restricted cash		139,944		120,149
Intangible assets, net		96,775		110,307
Other assets		46,747		45,761
Total assets		2,973,472		2,951,075
Notes and mortgages payable, net		1,834,074		1,801,084
Intangible liabilities, net		24,608		26,772
Other liabilities		82,503		87,575
Total liabilities		1,941,185		1,915,431
Equity		1,032,287		1,035,644
Total liabilities and equity		2,973,472		$ 2,951,075
Rental revenue		56,528	62,447
Other income		757	747
Total revenues		57,285	63,194
Operating		25,110	25,940
Depreciation and amortization		27,453	30,182
Total expenses		52,563	56,122
Interest and other income (loss), net		(33)	77
Interest and debt expense		(13,740)	(15,909)
Net loss before income taxes		(9,051)	(8,760)
Income tax expense		(16)	(39)
Net (loss) income attributable to common stockholders		$ (9,067)	$ (8,799)

[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 91.0% as of March 31, 2021. As of March 31, 2021, the Operating Partnership includes $4,058,855 and $2,574,276 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 11, Variable Interest Entities (“VIEs”).