Cover Page
| Cover Page | Oct. 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 28, 2020 |
| Entity Registrant Name | Cousins Properties Inc |
| Entity Central Index Key | 0000025232 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | GA |
| Entity File Number | 001-11312 |
| Entity Tax Identification Number | 58-0869052 |
| Entity Address, Address Line One | 3344 Peachtree Road NE |
| Entity Address, Address Line Two | Suite 1800 |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30326-4802 |
| City Area Code | 404 |
| Local Phone Number | 407-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $1 par value per share |
| Trading Symbol | CUZ |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |