Accounts Receivable and Major Customers

12 Months Ended

Dec. 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 December 31,
	2013			2012
Customers	$	93,288		$	43,967
Joint interest partners	76,199			16,154
Other 1	25,538			4,523
	195,025			64,644
Less: Allowance for doubtful accounts	(622		)	(1,666		)
	$	194,403		$	62,978

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¹ Amounts as of December 31, 2013 are comprised substantially of amounts due from the seller and other parties for purchase price adjustments attributable to the 2013 EF Acquisition.

For the year ended December 31, 2013, three customers accounted for $181.7 million, or approximately 42% of our consolidated product revenues. The revenues generated from these customers during 2013 were $70.4 million, $55.9 million and $55.4 million or 16%, 13% and 13% of the consolidated total, respectively. As of December 31, 2013, $34.8 million, or approximately 37% of our consolidated accounts receivable from customers was related to these customers. For the year ended December 31, 2012, four customers accounted for $182.0 million, or approximately 59% of our consolidated product revenues. The revenues generated from these customers during 2012 were $60.1 million, $46.7 million, $41.5 million and $33.8 million, or approximately 19%, 15%, 13% and 11% of the consolidated total, respectively. As of December 31, 2012, $21.6 million, or approximately 49% of our consolidated accounts receivable from customers was related to these customers. No significant uncertainties exist related to the collectability of amounts owed to us by any of these customers.