Organization and Business - Additional Information (Details) ft² in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2020 ft² Properties	Dec. 31, 2020 USD ($) ft² Properties
Real Estate Properties [Line Items]
Number of Real Estate Properties | Properties	13	13
Area of office and retail properties | ft²	12.9	12.9
Rent collections expressed as a percentage of billing	97.20%
Non-cash write-offs, primarily for straight-line rent receivables		$ 33,205,000
Uncollectible accounts receivable		$ 2,051,000
Office Tenants [Member]
Real Estate Properties [Line Items]
Annualized rent		96.50%
Rent collections expressed as a percentage of billing	98.50%
Non Office Tenants [Member]
Real Estate Properties [Line Items]
Annualized rent		3.50%
Rent collections expressed as a percentage of billing	61.60%
Variable Interest Entities [Member] | Paramount Group Operating Partnership [Member]
Real Estate Properties [Line Items]
Percentage of ownership in operating partnership		91.30%