| Document and Entity Information Document | Oct. 20, 2020 | Jul. 21, 2020 |
| Entity Information [Line Items] | ||
| Entity Central Index Key | 0001571283 | |
| Amendment Flag | false | |
| Document Type | 8-K | |
| Document Period End Date | Oct. 20, 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 | |
| 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 |
