Transactions with Related Parties

Sales, purchases and other transactions with affiliated companies, in the opinion of management, are conducted under terms no more or less favorable than then-existing market conditions. The transactions with related parties were as follows:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Revenues:
Sales of CO₂ to Sandhill Group, LLC ⁽¹⁾	$	750	$	878	$	2,153	$	2,366
Revenues from services and fees to Poseidon Oil Pipeline Company, LLC ⁽²⁾	3,170		1,979		9,236		5,935
Revenues from product sales to ANSAC	31,774		—		31,774		—
Costs and expenses:
Amounts paid to our CEO in connection with the use of his aircraft	$	165	$	165	$	495	$	495
Charges for services from Poseidon Oil Pipeline Company, LLC (2)	254		251		744		749
Charges for services from ANSAC	454		—		454		—


(1)	We own a 50% interest in Sandhill Group, LLC.


(2)	We own 64% interest in Poseidon Oil Pipeline Company, LLC.

Amount due from Related Party

At September 30, 2017 and December 31, 2016 (i) Sandhill Group, LLC owed us $0.2 million and $0.2 million, respectively, for purchases of CO₂, and (ii) Poseidon Oil Pipeline Company, LLC owed us $2.0 million and $1.6 million, respectively, for services rendered.

Transactions with Unconsolidated Affiliates

Poseidon

We are the operator of Poseidon and provide management, administrative and pipeline operator services to Poseidon under an Operation and Management Agreement . Currently, that agreement renews automatically annually unless terminated by either party (as defined in the agreement). Our revenues for the three and nine months ended September 30, 2017 reflect the $2.1 million and $6.3 million, respectively, of fees we earned through the provision of services under that agreement.

ANSAC

We (through a subsidiary of our Alkali Business) are a member of the American Natural Soda Ash Corp. (ANSAC), an organization whose purpose is promoting and increasing the use and sale of natural soda ash and other refined or processed sodium products produced in the U.S. and consumed in specified countries outside of the U.S. Members sell products to ANSAC to satisfy ANSAC’s sales commitments to its customers. ANSAC passes its costs through to its members. Those costs include sales and marketing, employees, office supplies, professional, travel, rent, and certain other costs. Those transactions do not necessarily represent arm's length transactions and may not represent all costs we would otherwise incur if we operated the Alkali Business on a stand-alone basis. We also benefit from favorable shipping rates for our direct exports when using ANSAC to arrange for ocean transport. Net sales to ANSAC were $31.8 million during the period September 1, 2017 to September 30, 2017. The costs charged to us by ANSAC, included in operating costs, were $0.5 million during the period September 1, 2017 to September 30, 2017.

Receivables from ANSAC as of September 30, 2017 are as follows:



	September 30,
	2017
Receivables:
ANSAC	$	59,406
Payables:
ANSAC	$	1,317