Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Total net sales	$ 1,135,896	$ 1,190,791	$ 1,593,147
Cost of sales	716,957	803,332	1,215,782
Gross profit	418,939	387,459	377,365
Selling, general and administrative expenses	28,495	29,751	29,678
Income from operations	390,444	357,708	347,687
Other income (expense)
Interest expense—Westlake	(25,701)	(26,501)	(13,407)
Other income, net	5,251	4,232	1,566
Income before income taxes	369,994	335,439	335,846
Provision for income taxes	835	813	1,017
Net income	369,159	334,626	334,829
Less: Net income attributable to noncontrolling interest in OpCo	306,767	280,343	270,656
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income	$ 62,392	$ 54,283	$ 64,173
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Weighted average limited partner units outstanding (basic and diluted)	35,232,870	35,224,340	35,217,336
Affiliated Entity
Net co-products, ethylene and other sales—third parties	$ 950,801	$ 1,026,655	$ 1,342,910
Nonrelated Party
Net co-products, ethylene and other sales—third parties	185,095	164,136	250,237
Westlake | Affiliated Entity
Selling, general and administrative expenses	25,654	27,085	26,621
Other income (expense)
Interest expense—Westlake	(25,701)	(26,501)	(13,407)
Common units
Other income (expense)
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income	$ 62,392	$ 54,283	$ 64,173
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Common units	$ 1.77	$ 1.54	$ 1.82
Diluted units	$ 1.77	$ 1.54	$ 1.82
Weighted average limited partner units outstanding (basic and diluted)	35,232,870	35,224,340	35,217,336
Common units | Publicly and Privately Held
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)
Weighted average limited partner units outstanding (basic and diluted)	21,110,640	21,102,110	21,095,106
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)	14,122,230	14,122,230	14,122,230