| Document and Entity Information | Nov. 25, 2019 |
| Cover [Abstract] | |
| Entity Address, State or Province | NY |
| Amendment Flag | false |
| Entity Central Index Key | 0001605607 |
| Document Type | 8-K |
| Document Period End Date | Nov. 25, 2019 |
| Entity Registrant Name | Paramount Group, Inc. |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 001-36746 |
| Entity Tax Identification Number | 32-0439307 |
| Entity Address, Address Line One | 1633 Broadway |
| Entity Address, Address Line Two | Suite 1801 |
| Entity Address, City or Town | New York |
| Entity Address, Postal Zip Code | 10019 |
| City Area Code | (212) |
| Local Phone Number | 237-3100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock of Paramount Group, Inc., $0.01 par value per share |
| Trading Symbol | PGRE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
