Supplemental Disclosures to the Consolidated Statements of Cash Flows

6 Months Ended

Jun. 30, 2013

Supplemental Cash Flow Elements [Abstract]

Supplemental disclosures to the consolidated statements of cash flows

Supplemental disclosures to the consolidated statements of cash flows

Supplemental disclosures to the consolidated statements of cash flows are presented below:

	Six months ended June 30,
	2013			2012
Net cash provided by operating activities included:
Cash payments for interest	$	53,199		$	54,306
Interest capitalized	(7,549		)	(1,927		)
Cash payments for interest, net of amounts capitalized	$	45,650		$	52,379
Cash payments for income taxes	$	240		$	155
Non-cash investing activities included:
Asset retirement costs capitalized	$	262		$	416
Oil and natural gas properties acquired through increase in accounts payable and accrued liabilities	$	19,613		$	39,418