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Long-term Debt Payable to Westlake
 3 Months Ended
Mar. 31, 2018
Related Party Transactions [Abstract]  
Long-term Debt Payable to Westlake
Long-term Debt Payable to Westlake
Long-term debt payable to Westlake consists of the following:
 
 
March 31,
2018
 
December 31,
2017
OpCo Revolver (variable interest rate of LIBOR plus 3.0%, original scheduled maturity of
   August 4, 2019)

$
224,064

 
$
220,416

MLP Revolver (variable interest rate of LIBOR plus 2.0%, original scheduled maturity of
   April 29, 2021)
 
253,544

 
253,544

 
 
$
477,608

 
$
473,960


The weighted average interest rate on all long-term debt was 4.08% and 3.76% at March 31, 2018 and December 31, 2017, respectively.
As of March 31, 2018, the Partnership was in compliance with all of the covenants under the OpCo Revolver and the MLP Revolver.