Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 19,923	$ 19,744
Receivable under the Investment Management Agreement—Westlake Chemical Corporation (Westlake)	162,773	148,956
Accounts receivable, net—Westlake Chemical Corporation (Westlake)	42,847	57,280
Accounts receivable, net—third parties	9,914	16,404
Inventories	2,484	4,388
Prepaid expenses and other current assets	470	370
Total current assets	238,411	247,142
Property, plant and equipment, net	1,102,995	1,148,265
Goodwill	5,814	5,814
Deferred charges and other assets, net	46,236	60,904
Total assets	1,393,456	1,462,125
Current liabilities
Accounts payable—Westlake	15,201	27,477
Accounts payable—third parties	6,141	5,045
Accrued and other liabilities	17,507	16,250
Total current liabilities	38,849	48,772
Long-term debt payable to Westlake	399,674	477,608
Deferred income taxes	1,649	1,664
Other liabilities	1,149	0
Total liabilities	441,321	528,044
Commitments and contingencies (Note 17)
EQUITY
Total Westlake Chemical Partners LP partners' capital	277,514	215,810
Noncontrolling interest in Westlake Chemical OpCo LP (OpCo)	674,621	718,271
Total equity	952,135	934,081
Total liabilities and equity	1,393,456	1,462,125
Limited Partner [Member] | Common units [Member] | Public [Member]
EQUITY
Limited partners' capital	471,736	409,608
Total equity	471,736	409,608
Limited Partner [Member] | Common units [Member] | Westlake [Member]
EQUITY
Limited partners' capital	48,350	48,774
Total equity	48,350	48,774
General Partner [Member] | Westlake [Member]
EQUITY
General partner—Westlake	(242,572)	(242,572)
Total equity	$ (242,572)	$ (242,572)