Accounts Receivable and Major Customers

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Accounts Receivable and Major Customers

Accounts Receivable and Major Customers

The following table summarizes our accounts receivable by type as of the dates presented:

	As of
	June 30,			December 31,
	2013			2012
Customers	$	66,791		$	43,967
Joint interest partners	63,201			16,154
Other	2,786			4,523
	132,778			64,644
Less: Allowance for doubtful accounts	(261		)	(1,666		)
	$	132,517		$	62,978

For the six months ended June 30, 2013, four customers accounted for $93.1 million, or approximately 48%, of our consolidated product revenues. The revenues generated from these customers during the six months ended June 30, 2013 were $31.3 million, $21.9 million, $20.5 million and $19.4 million or 16%, 11%, 11% and 10% of the consolidated total, respectively. As of June 30, 2013, $28.2 million, or approximately 42% of our consolidated accounts receivable from customers related to these customers. For the six months ended June 30, 2012, three customers accounted for $78.3 million, or approximately 49% of our consolidated product revenues. The revenues generated from these customers during the six months ended June 30, 2012 were $29.9 million, $30.9 million and $17.5 million or approximately 19%, 19% and 11% of the consolidated total, respectively. As of December 31, 2012, $16.3 million, or approximately 37% of our consolidated accounts receivable from customers related to these customers. No significant uncertainties exist related to the collectability of amounts owed to us by any of these customers.