Variable Interest Entities ("VIEs") - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Real estate, net		$ 7,414,766	$ 7,457,012
Cash and restricted cash		306,379	365,409	$ 266,285	$ 250,425
Preferred equity investments			36,042
Accounts and other receivables, net		19,695	20,076
Deferred rent receivable		289,565	267,456
Deferred charges, net		130,550	117,858
Intangible assets, net		239,326	270,445
Other assets		137,597	132,465
Total assets	[1]	8,853,875	8,755,978
Notes and mortgages payable, net		3,599,800	3,599,800
Accounts payable and accrued expenses		124,460	124,334
Intangible liabilities, net		84,531	95,991
Other liabilities		64,309	51,170
Total liabilities	[1]	4,040,486	3,864,314
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,693,813	1,699,618
Cash and restricted cash		69,570	63,450
Investments in unconsolidated joint ventures		69,346	52,923
Preferred equity investments			36,042
Accounts and other receivables, net		1,239	2,107
Deferred rent receivable		55,070	51,926
Deferred charges, net		22,845	14,160
Intangible assets, net		37,501	45,818
Other assets		22,570	16,635
Total assets		1,971,954	1,982,679
Notes and mortgages payable, net		1,198,162	1,197,644
Accounts payable and accrued expenses		40,281	24,183
Intangible liabilities, net		25,266	31,582
Other liabilities		4,230	5
Total liabilities		$ 1,267,939	$ 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 90.4% as of June 30, 2019. The assets and liabilities of the Operating Partnership, as of June 30, 2019, include $1,971,954 and $1,267,939 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 13, Variable Interest Entities (“VIEs”).