Investments in Unconsolidated Joint Ventures - Summary of Financial Information of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Total assets	[1]	$ 8,545,585		$ 8,545,585		$ 8,554,097
Total liabilities	[1]	4,082,368		4,082,368		4,038,363
Equity		3,588,681		3,588,681		3,653,177
Total liabilities and equity		8,545,585		8,545,585		8,554,097
Rental revenue		170,851	$ 165,420	518,625	$ 504,834
Other income		1,719	2,202	4,509	5,353
Total revenues		179,131	176,775	542,566	531,879
Operating		67,131	67,865	197,821	199,192
Depreciation and amortization		57,522	58,889	175,752	176,032
Total expenses		137,997	143,640	420,115	422,721
Interest and other (loss) income		138	1,104	2,510	2,360
Interest and debt expense		(36,266)	(35,792)	(105,919)	(108,420)
Net income (loss) before income taxes		5,505	(5,877)	(1,164)	(11,261)
Income tax expense		(873)	(393)	(2,448)	(1,135)
Net loss attributable to common stockholders		(2,055)	(6,958)	(21,576)	(9,880)
Unconsolidated Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Real estate, net		2,254,141		2,254,141		2,674,858
Cash and cash equivalents and restricted cash		210,194		210,194		120,149
Intangible assets, net		71,193		71,193		110,307
For-sale residential condominium units (1)		389,755		389,755
Other assets		62,099		62,099		45,761
Total assets		2,987,382		2,987,382		2,951,075
Notes and mortgages payable, net		1,846,667		1,846,667		1,801,084
Intangible liabilities, net		20,447		20,447		26,772
Other liabilities		73,926		73,926		87,575
Total liabilities		1,941,040		1,941,040		1,915,431
Equity		1,046,342		1,046,342		1,035,644
Total liabilities and equity		2,987,382		2,987,382		$ 2,951,075
Rental revenue		57,998	61,340	171,721	182,923
Other income		92,360	625	93,698	2,149
Total revenues		150,358	61,965	265,419	185,072
Operating		102,949	26,381	153,526	81,963
Depreciation and amortization		26,432	29,700	80,899	88,981
Total expenses		129,381	56,081	234,425	170,944
Interest and other (loss) income		(27)	(45)	(83)	3
Interest and debt expense		(17,503)	(14,030)	(45,135)	(44,244)
Net income (loss) before income taxes		3,447	(8,191)	(14,224)	(30,113)
Income tax expense		(17)	(1)	(32)	(45)
Net loss attributable to common stockholders		$ 3,430	$ (8,192)	$ (14,256)	$ (30,158)

[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 90.9% as of September 30, 2021. As of September 30, 2021, the Operating Partnership includes $4,070,290 and $2,581,637 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 12, Variable Interest Entities (“VIEs”).