Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total net sales	$ 237,629	$ 284,673
Cost of sales	183,548	182,493
Gross profit	54,081	102,180
Selling, general and administrative expenses	7,474	7,077
Income from operations	46,607	95,103
Other income (expense)
Interest expense—Westlake	(5,537)	(6,581)
Other income, net	1,346	1,334
Income before income taxes	42,416	89,856
Provision for income taxes	107	210
Net income	42,309	89,646
Less: Net income attributable to noncontrolling interest in OpCo	37,361	74,813
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income	$ 4,948	$ 14,833
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Weighted average limited partner units outstanding (basic and diluted) (in units)	35,238,556	35,228,134
Common units
Other income (expense)
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income	$ 4,948	$ 14,833
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Common units (basic) (in usd per share)	$ 0.14	$ 0.42
Common units, diluted (in usd per share)	$ 0.14	$ 0.42
Weighted average limited partner units outstanding (basic and diluted) (in units)	35,238,556	35,228,134
Common units | Westlake
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Weighted average limited partner units outstanding (basic and diluted) (in units)	14,122,230	14,122,230
Publicly and Privately Held | Common units
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Weighted average limited partner units outstanding (basic and diluted) (in units)	21,116,326	21,105,904
Affiliated Entity
Net co-products, ethylene and other sales—third parties	$ 190,781	$ 235,209
Affiliated Entity | Westlake
Selling, general and administrative expenses	6,431	6,099
Other income (expense)
Interest expense—Westlake	(5,537)	(6,581)
Nonrelated Party
Net co-products, ethylene and other sales—third parties	$ 46,848	$ 49,464