Variable Interest Entities ("VIEs") - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Real estate, net		$ 7,439,667	$ 7,457,012
Cash and restricted cash		18,163	25,756	$ 33,032	$ 31,044
Preferred equity investments			36,042
Accounts and other receivables, net		20,136	20,076
Deferred rent receivable		279,036	267,456
Deferred charges, net		119,191	117,858
Intangible assets, net		254,354	270,445
Other assets		104,193	132,465
Total assets	[1]	8,721,637	8,755,978
Notes and mortgages payable, net		3,599,800	3,599,800
Accounts payable and accrued expenses		125,599	124,334
Intangible liabilities, net		89,955	95,991
Other liabilities		56,565	51,170
Total liabilities	[1]	3,867,001	3,864,314
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,695,367	1,699,618
Cash and restricted cash		77,206	63,450
Investments in unconsolidated joint ventures		66,059	52,923
Preferred equity investments			36,042
Accounts and other receivables, net		1,901	2,107
Deferred rent receivable		54,005	51,926
Deferred charges, net		16,825	14,160
Intangible assets, net		41,525	45,818
Other assets		20,122	16,635
Total assets		1,973,010	1,982,679
Notes and mortgages payable, net		1,197,903	1,197,644
Accounts payable and accrued expenses		35,875	24,183
Intangible liabilities, net		28,176	31,582
Other liabilities		4,209	5
Total liabilities		$ 1,266,163	$ 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 90.5% as of March 31, 2019. The assets and liabilities of the Operating Partnership, as of March 31, 2019, include $1,973,010 and $1,266,163 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 11, Variable Interest Entities (“VIEs”).