| Document and Entity Information | Sep. 02, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | Terreno Realty Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001476150 |
| Document Type | 8-K |
| Document Period End Date | Sep. 02, 2022 |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 001-34603 |
| Entity Tax Identification Number | 27-1262675 |
| Entity Address, Address Line One | 10500 NE 8th Street |
| Entity Address, Address Line Two | Suite 301 |
| Entity Address, City or Town | Bellevue |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 98004 |
| City Area Code | (415) |
| Local Phone Number | 655-4580 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value per share |
| Trading Symbol | TRNO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
