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Long-term Debt Payable to Westlake (Tables)
 3 Months Ended
Mar. 31, 2022
Related Party Transactions [Abstract]  
Related Party Transactions, Long-term Debt
Long-term debt payable to Westlake consists of the following:
March 31,
2022		December 31,
2021
OpCo Revolver (variable interest rate of London Interbank Offered Rate ("LIBOR") plus 2.0%, scheduled maturity of September 25, 2023)
$22,619 $22,619 
MLP Revolver (variable interest rate of LIBOR plus 2.0%, scheduled maturity of March 19, 2023)
377,055 377,055 
Total debt$399,674 $399,674 
Less current debt:
MLP Revolver377,055 — 
Long-term debt, net of current debt$22,619 $399,674