Investments in Unconsolidated Joint Ventures - Summary of Financial Information of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items]
Real estate, net		$ 7,050,336		$ 7,050,336		$ 7,099,669
Cash and cash equivalents and restricted cash		556,459	$ 306,379	556,459	$ 306,379	331,487	$ 365,409
Intangible assets, net		179,244		179,244		203,169
Other assets		45,340		45,340		51,373
Total assets	[1]	8,833,182		8,833,182		8,734,135
Notes and mortgages payable, net		3,790,430		3,790,430		3,783,851
Intangible liabilities, net		65,769		65,769		73,789
Other liabilities		59,091		59,091		66,004
Total liabilities	[1]	4,245,506		4,245,506		4,103,173
Equity		3,723,510		3,723,510		3,785,730
Total liabilities and equity		8,833,182		8,833,182		8,734,135
Rental revenue		163,989	174,044	339,414	349,385
Fee and other income		7,129	7,299	15,690	16,347
Total revenues		171,118	181,343	355,104	365,732
Operating		64,313	64,736	131,327	130,197
Depreciation and amortization		58,716	60,277	117,143	120,989
Total expenses		141,188	142,890	279,081	287,242
Interest and other (loss) income, net		2,252	2,583	1,256	6,483
Interest and debt expense		(36,009)	(37,213)	(72,628)	(74,137)
Net loss before income taxes		(9,693)	3,386	(5,384)	9,418
Income tax expense		(138)	(268)	(742)	(1,406)
Net (loss) income attributable to common stockholders		(6,270)	2,455	(2,922)	6,164
Unconsolidated Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Real estate, net		2,605,205		2,605,205		2,581,738
Cash and cash equivalents and restricted cash		99,300		99,300		75,071
Intangible assets, net		140,312		140,312		172,041
Other assets		38,594		38,594		36,218
Total assets		2,883,411		2,883,411		2,865,068
Notes and mortgages payable, net		1,706,229		1,706,229		1,648,403
Intangible liabilities, net		31,522		31,522		38,377
Other liabilities		91,771		91,771		65,759
Total liabilities		1,829,522		1,829,522		1,752,539
Equity		1,053,889		1,053,889		1,112,529
Total liabilities and equity		2,883,411		2,883,411		$ 2,865,068
Rental revenue		59,136	36,455	121,583	74,679
Fee and other income		777	393	1,524	491
Total revenues		59,913	36,848	123,107	75,170
Operating		29,642	15,274	55,582	29,677
Depreciation and amortization		29,099	15,082	59,281	29,207
Total expenses		58,741	30,356	114,863	58,884
Interest and other (loss) income, net		(29)	201	48	299
Interest and debt expense		(14,305)	(12,323)	(30,214)	(23,850)
Net loss before income taxes		(13,162)	(5,630)	(21,922)	(7,265)
Income tax expense		(5)		(44)	(8)
Net (loss) income attributable to common stockholders		$ (13,167)	$ (5,630)	$ (21,966)	$ (7,273)

[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 91.4% as of June 30, 2020. The assets and liabilities of the Operating Partnership, as of June 30, 2020, include $4,019,707 and $2,537,846 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 12, Variable Interest Entities (“VIEs”).