Variable Interest Entities ("VIEs") - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Real estate, net		$ 7,193,920		$ 7,457,012
Cash and cash equivalents and restricted cash		331,487		365,409		$ 250,425	$ 192,339
Preferred equity investments				36,042
Accounts and other receivables, net		19,231		20,076
Deferred rent receivable		305,794		267,456
Deferred charges, net		127,171		117,858
Intangible assets, net		208,744		270,445
Other assets		51,373		132,465
Total assets		8,734,135	[1]	8,755,978	[1]	$ 8,917,661
Notes and mortgages payable, net		3,783,851		3,566,917
Accounts payable and accrued expenses		117,356		124,334
Intangible liabilities, net		73,789		95,991
Other liabilities		66,004		51,170
Total liabilities	[1]	4,103,173		3,864,314
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,685,391		1,699,618
Cash and cash equivalents and restricted cash		69,828		63,450
Investments in unconsolidated joint ventures		69,535		52,923
Preferred equity investments				36,042
Accounts and other receivables, net		2,140		2,107
Deferred rent receivable		57,338		51,926
Deferred charges, net		24,030		14,160
Intangible assets, net		29,872		45,818
Other assets		21,132		16,635
Total assets		1,959,266		1,982,679
Notes and mortgages payable, net		1,205,324		1,197,644
Accounts payable and accrued expenses		35,252		24,183
Intangible liabilities, net		19,841		31,582
Other liabilities		13,047		5
Total liabilities		$ 1,273,464		$ 1,253,414

[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 90.2% as of December 31, 2019. The assets and liabilities of the Operating Partnership, as of December 31, 2019, include $1,959,266 and $1,273,464 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 13, Variable Interest Entities (“VIEs”).}