v3.26.1
Document and Entity Information
Aug. 31, 2026
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001604665
Document Type 8-K
Document Period End Date Aug. 31, 2026
Entity Registrant Name Westlake Chemical Partners LP
Entity Incorporation State Country Code DE
Entity File Number 001-36567
Entity Tax Identification Number 32-0436529
Entity Address, Address Line One 5444 Westheimer
Entity Address, Address Line Two Suite 101
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77056
City Area Code (713)
Local Phone Number 585-2900
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common units representing limited partner interests
Trading Symbol WLKP
Security Exchange Name NYSE
Entity Emerging Growth Company false