| Document and Entity Information | Jun. 03, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | POTLATCHDELTIC CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0001338749 |
| Document Type | 8-K |
| Document Period End Date | Jun. 3, 2022 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-32729 |
| Entity Tax Identification Number | 82-0156045 |
| Entity Address, Address Line One | 601 West First Avenue |
| Entity Address, Address Line Two | 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 |
| Security 12b Title | Common Stock ($1 par value) |
| Trading Symbol | PCH |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
