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Cover
Nov. 01, 2024
Document Information [Line Items]  
Document Type 8-K
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Amendment Flag false
Document Period End Date Nov. 01, 2024
Entity Information [Line Items]  
Entity Registrant Name CLEARWATER PAPER CORPORATION
Entity Central Index Key 0001441236
Entity File Number 001-34146
Entity Tax Identification Number 20-3594554
Entity Incorporation, State or Country Code DE
Entity Emerging Growth Company false
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 601 West Riverside,
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
Entity Phone Fax Numbers [Line Items]  
City Area Code (509)
Local Phone Number 344-5900
Entity Listings [Line Items]  
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol CLW
Security Exchange Name NYSE