Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Cash flows from operating activities
Net Income	$ 80,825	$ 913,108	$ 76,622
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	31,282		27,542
Loss from disposition of property, plant and equipment	2,970		1,359
Other loss, net	992		103
Changes in operating assets and liabilities
Accounts receivable—third parties	(21,593)		(8,744)
Net accounts receivable—Westlake	56,738		60,978
Inventories	1,011		303
Prepaid expenses and other current assets	158		175
Accounts payable	(11,634)		(625)
Accrued and other liabilities	(35,358)		(699)
Other, net	(581)		(1,606)
Cash flows from investing activities	104,810		155,408
Cash flows from investing activities
Additions to property, plant and equipment	(20,342)		(12,748)
Maturities of investments with Westlake under the Investment Management Agreement	50,000		0
Investments with Westlake under the Investment Management Agreement	(55,000)		(64,000)
Other	0		126
Net cash used for investing activities	(25,342)		(76,622)
Cash flows from financing activities
Quarterly distributions to noncontrolling interest retained in OpCo by Westlake	(60,688)		(62,058)
Quarterly distributions to unitholders	(16,603)		(16,593)
Net cash used for financing activities	(77,291)		(78,651)
Net increase in cash and cash equivalents	2,177		135
Cash and cash equivalents at beginning of period	17,057	$ 17,289	17,154
Cash and cash equivalents at end of period	$ 19,234		$ 17,289