Supplemental Disclosures of Cash Flow Information

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosures of Cash Flow Information

Supplemental Disclosures of Cash Flow Information

Supplemental cash flow information is as follows:

	Year Ended December 31,
	2018			2017			2016
	(in thousands)
Cash paid for interest	$	50,063		$	61,295		$	58,193
Cash paid for income taxes	—			—			—
Supplemental disclosures of non-cash investing and financing activities:
Accrued liabilities - oil and gas properties	98,346			43,980			23,944
Change in asset retirement obligations, net of disposals	10,778			5,376			(4,799		)
Fair value of debt exchanged for common stock	—			48,992			74,400
Retirement of treasury stock	(1,535		)	(1,253		)	(1,114		)
Properties exchanged in non-cash transactions	—			13,323			—
Issuance of common stock for Merger	484,000			—			—