Variable Interest Entities - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Real estate, net		$ 7,752,567	$ 7,841,530
Cash and restricted cash		32,755	31,044	$ 42,384	$ 29,374
Preferred equity investments, net		35,925	35,817
Accounts and other receivables, net		15,549	17,082
Deferred rent receivable		252,140	220,826
Deferred charges, net		116,147	98,645
Intangible assets, net		316,451	352,206
Other assets		57,821	20,076
Total assets	[1]	8,915,913	8,917,661
Notes and mortgages payable, net		3,599,800	3,583,100
Accounts payable and accrued expenses		123,720	117,630
Intangible liabilities, net		115,559	130,028
Other liabilities		54,507	54,109
Total liabilities	[1]	3,910,165	3,895,577
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,711,766	1,726,800
Cash and restricted cash		79,622	55,658
Investments in unconsolidated joint ventures		40,236	16,031
Preferred equity investments, net		35,925	35,817
Accounts and other receivables, net		1,626	2,550
Deferred rent receivable		47,663	44,000
Deferred charges, net		10,777	8,123
Intangible assets, net		56,230	66,112
Other assets		18,035	929
Total assets		2,001,880	1,956,020
Notes and mortgages payable, net		1,197,126	1,196,607
Accounts payable and accrued expenses		29,392	21,211
Intangible liabilities, net		38,754	46,365
Other liabilities		151	155
Total liabilities		$ 1,265,423	$ 1,264,338

[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 June 30, 2018. The assets and liabilities of the Operating Partnership, as of June 30, 2018, include $2,001,880 and $1,265,423 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 12, Variable Interest Entities.