| Document And Entity Information | Nov. 06, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | PotlatchDeltic Corporation |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Central Index Key | 0001338749 |
| Document Period End Date | Nov. 6, 2020 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-32729 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 82-0156045 |
| Entity Address, Address Line One | 601 W. First Avenue, Suite 1600 |
| Entity Address, City or Town | Spokane |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 99201 |
| City Area Code | 509 |
| Local Phone Number | 835-1500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock |
| Trading Symbol | PCH |
| Name of each exchange on which registered | NASDAQ |
