| Document and Entity Information Document | Feb. 10, 2020 |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0001571283 |
| Amendment Flag | false |
| Document Type | 8-K |
| Document Period End Date | Feb. 10, 2020 |
| Entity Registrant Name | REXFORD INDUSTRIAL REALTY, INC. |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 001-36008 |
| Entity Tax Identification Number | 46-2024407 |
| Entity Address, Address Line One | 11620 Wilshire Boulevard, Suite 1000 |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90025 |
| City Area Code | 310 |
| Local Phone Number | 966-1680 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Current Fiscal Year End Date | --12-31 |
| Common Stock, $0.01 par value | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | REXR |
| Security Exchange Name | NYSE |
| 5.875% Series A Cumulative Redeemable Preferred Stock | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 5.875% Series A Cumulative Redeemable Preferred Stock |
| Trading Symbol | REXR-PA |
| Security Exchange Name | NYSE |
| 5.875% Series B Cumulative Redeemable Preferred Stock | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 5.875% Series B Cumulative Redeemable Preferred Stock |
| Trading Symbol | REXR-PB |
| Security Exchange Name | NYSE |
| 5.625% Series C Cumulative Redeemable Preferred Stock | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 5.625% Series C Cumulative Redeemable Preferred Stock |
| Trading Symbol | REXR-PC |
| Security Exchange Name | NYSE |
