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v3.25.4

Unit-based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Jul. 15, 2014
Weighted Average Fair Value |  |  |  |
Unrecognized compensation weighted average remaining term | 7 months 6 days |  |  |
Phantom Share Units (PSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Fair value of phantom units vested | $ 322 | $ 423 | $ 278 |
Number of Units |  |  |  |
Beginning balance | 14,646 |  |  |
Granted (in shares) | 15,015 |  |  |
Vested (in shares) | (14,646) |  |  |
Ending balance | 15,015 | 14,646 |  |
Weighted Average Fair Value |  |  |  |
Weighted Average Fair Value, beginning balance (usd per share) | $ 23.14 |  |  |
Weighted Average Grant Date Fair Value, Granted (usd per share) | 21.92 |  |  |
Weighted Average Grant Date Fair Value, Vested (usd per share) | 21.96 |  |  |
Weighted Average Fair Value, ending balance (usd per share) | $ 19.00 | $ 23.14 |  |
Westlake Chemical Partners LP Long-Term Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of units authorized |  |  |  | 1,270,000
Weighted Average Fair Value |  |  |  |
Total units available for grant | 1,184,657 |  |  |
Unrecognized compensation cost | $ 169 |  |  |
Westlake Chemical Partners LP Long-Term Incentive Plan | Selling, General and Administrative Expenses |  |  |  |
Weighted Average Fair Value |  |  |  |
Total compensation cost | $ 301 | $ 373 | $ 349 |

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