Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Actual Plan Asset Allocations of the PotlatchDeltic Retirement Plans' Assets Assets) (Details) - Pension Plans [Member]	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Global Equities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	20.00%	19.00%
Fixed Income Securities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	74.00%	74.00%
Other (Includes Cash and Cash Equivalents and Alternatives) [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	6.00%	7.00%