XML 54 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Feb. 25, 2020
Jun. 30, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol GLT    
Entity Registrant Name P. H. Glatfelter Company    
Entity Central Index Key 0000041719    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Interactive Data Current Yes    
Entity File Number 1-03560    
Entity Tax Identification Number 23-0628360    
Entity Address, Address Line One 96 South George Street    
Entity Address, Address Line Two Suite 520    
Entity Address, City or Town York    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 17401    
City Area Code 717    
Local Phone Number 850 0170    
Document Annual Report true    
Document Transition Report false    
Title of 12(b) Security Common Stock, par value $.01 per share    
Security Exchange Name NYSE    
Entity Incorporation, State or Country Code PA    
Entity Common Stock, Shares Outstanding   44,308,031  
Entity Public Float     $ 728.0
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the following documents are incorporated by reference in this Annual Report on Form 10‑K:

Portions of the registrant’s Proxy Statement to be dated on or about March 30, 2020 are incorporated by reference to Part III.