XML 11 R1.htm IDEA: XBRL DOCUMENT v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
Apr. 28, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Amendment Flag false  
Document Period End Date Mar. 31, 2025  
Entity File Number 001-34146  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Registrant Name CLEARWATER PAPER CORPORATION  
Entity Central Index Key 0001441236  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-3594554  
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  
Current Fiscal Year End Date --12-31  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol CLW  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Small Business false  
Document Transition Report false  
Entity Common Stock, Shares Outstanding   16,255,627
Local Phone Number 344-5900  
City Area Code 509