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Document and Entity Information
Mar. 15, 2023
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 15, 2023
Entity Registrant Name CLEARWATER PAPER CORPORATION
Entity Incorporation, State or Country Code DE
Entity File Number 001-34146
Entity Tax Identification Number 20-3594554
Entity Address, Address Line One 601 West Riverside Ave.
Entity Address, Address Line Two Suite 1100
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 344-5900
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001441236
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol CLW
Security Exchange Name NYSE