Accounts Receivable and Major Customers

3 Months Ended

Mar. 31, 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
	March 31,			December 31,
	2013			2012
Customers	$	49,978		$	43,967
Joint interest partners	13,197			16,154
Other	2,851			4,523
	66,026			64,644
Less: Allowance for doubtful accounts	(1,648		)	(1,666		)
	$	64,378		$	62,978

For the three months ended March 31, 2013, four customers accounted for $46.2 million, or approximately 56%, of our consolidated product revenues. The revenues generated from these customers during the three months ended March 31, 2013 were $16.1 million, $10.9 million, $10.6 million and $8.6 million or 20%, 13%, 13% and 10% of the consolidated total, respectively. As of March 31, 2013, $23.8 million, or approximately 37% of our consolidated accounts receivable, including joint interest billings, related to these customers. For the three months ended March 31, 2012, two customers accounted for $32.9 million, or approximately 40% of our consolidated product revenues. The revenues generated from these customers during the three months ended March 31, 2012 were $16.8 million and $16.1 million, or approximately 20% and 19% of the consolidated total, respectively. As of December 31, 2012, $10.1 million, or approximately 16% of our consolidated accounts receivable, including joint interest billings, related to these customers. No significant uncertainties exist related to the collectability of amounts owed to us by any of these customers.