Variable Interest Entities - Summary of Assets and Liabilities of Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Real estate, net		$ 7,824,687	$ 7,841,530
Cash and restricted cash		33,032	31,044	$ 75,198	$ 29,374
Preferred equity investments, net		35,870	35,817
Accounts and other receivables, net		17,036	17,082
Deferred rent receivable		234,758	220,826
Deferred charges, net		106,415	98,645
Intangible assets, net		333,983	352,206
Other assets		75,925	20,076
Total assets	[1]	8,973,868	8,917,661
Notes and mortgages payable, net		3,599,800	3,583,100
Accounts payable and accrued expenses		128,625	117,630
Intangible liabilities, net		122,673	130,028
Other liabilities		54,344	54,109
Total liabilities	[1]	3,919,798	3,895,577
Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Real estate, net		1,718,880	1,726,800
Cash and restricted cash		71,551	55,658
Investments in unconsolidated joint ventures		39,230	16,031
Preferred equity investments, net		35,870	35,817
Accounts and other receivables, net		2,564	2,550
Deferred rent receivable		45,504	44,000
Deferred charges, net		9,192	8,123
Intangible assets, net		61,073	66,112
Other assets		16,065	929
Total assets		1,999,929	1,956,020
Notes and mortgages payable, net		1,196,867	1,196,607
Accounts payable and accrued expenses		30,422	21,211
Intangible liabilities, net		42,519	46,365
Other liabilities		155	155
Total liabilities		$ 1,269,963	$ 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 March 31, 2018. The assets and liabilities of the Operating Partnership, as of March 31, 2018, include $1,999,929 and $1,269,963 of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. See Note 11, Variable Interest Entities.