Variable Interest Entities ("VIEs") - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Real estate, net		$ 7,082,704	$ 7,099,669
Cash and cash equivalents and restricted cash		398,252	331,487	$ 360,471	$ 365,409
Accounts and other receivables, net		17,826	19,231
Deferred rent receivable		312,249	301,588
Deferred charges, net		124,908	126,367
Intangible assets, net		191,183	203,169
Other assets		80,632	51,373
Total assets	[1]	8,754,256	8,734,135
Notes and mortgages payable, net		3,788,684	3,783,851
Accounts payable and accrued expenses		109,563	117,356
Intangible liabilities, net		69,752	73,789
Other liabilities		54,723	66,004
Total liabilities	[1]	4,247,064	4,103,173
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,681,036	1,685,391
Cash and cash equivalents and restricted cash		74,514	69,828
Investments in unconsolidated joint ventures		69,533	69,535
Accounts and other receivables, net		3,637	2,140
Deferred rent receivable		60,416	57,338
Deferred charges, net		25,245	24,030
Intangible assets, net		27,553	29,872
Other assets		20,040	21,132
Total assets		1,961,974	1,959,266
Notes and mortgages payable, net		1,208,656	1,205,324
Accounts payable and accrued expenses		39,165	35,252
Intangible liabilities, net		18,110	19,841
Other liabilities		4,290	13,047
Total liabilities		$ 1,270,221	$ 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 91.5% as of March 31, 2020. The assets and liabilities of the Operating Partnership, as of March 31, 2020, include $1,961,974 and $1,270,221 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 12, Variable Interest Entities (“VIEs”).