Variable Interest Entities ("VIEs") - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Real estate, net		$ 7,050,336	$ 7,099,669
Cash and cash equivalents and restricted cash		556,459	331,487	$ 306,379	$ 365,409
Deferred rent receivable		321,480	301,588
Deferred charges, net		123,446	126,367
Intangible assets, net		179,244	203,169
Other assets		45,340	51,373
Total assets	[1]	8,833,182	8,734,135
Notes and mortgages payable, net		3,790,430	3,783,851
Accounts payable and accrued expenses		105,924	117,356
Intangible liabilities, net		65,769	73,789
Other liabilities		59,091	66,004
Total liabilities	[1]	4,245,506	4,103,173
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		3,490,042	1,685,391
Cash and cash equivalents and restricted cash		110,860	69,828
Investments in unconsolidated joint ventures		67,986	69,535
Accounts and other receivables		5,636	2,140
Deferred rent receivable		178,933	57,338
Deferred charges, net		56,572	24,030
Intangible assets, net		85,662	29,872
Other assets		24,016	21,132
Total assets		4,019,707	1,959,266
Notes and mortgages payable, net		2,449,538	1,205,324
Accounts payable and accrued expenses		47,631	35,252
Intangible liabilities, net		36,297	19,841
Other liabilities		4,380	13,047
Total liabilities		$ 2,537,846	$ 1,273,464

[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”).