Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The accompanying unaudited condensed consolidated statements of cash flows (“accompanying statements of cash flows”) line items that were adjusted as a result of the adoption of ASU 2016-15 and ASU 2016-18 for the six months ended June 30, 2017, are summarized as follows:



	For the Six Months Ended June 30, 2017
	As Reported			As Adjusted
	(in thousands)
Cash flows from operating activities:
Non-cash (gain) loss on extinguishment of debt, net	$	22		N/A
Loss on extinguishment of debt	N/A			$	35
Net cash provided by operating activities	$	242,115		$	242,128

Cash flows from investing activities:
Other, net	$	3,000		N/A
Net cash provided by (used in) investing activities	$	314,364		$	311,364

Cash flows from financing activities:
Cash paid for extinguishment of debt	N/A			$	(13	)
Net cash used in financing activities	$	(6,330	)	$	(6,343	)

Net change in cash and cash equivalents	$	550,149		N/A
Net change in cash, cash equivalents, and restricted cash	N/A			$	547,149
Cash and cash equivalents at beginning of period	$	9,372		N/A
Cash, cash equivalents, and restricted cash at beginning of period	N/A			$	12,372
Cash and cash equivalents at end of period	$	559,521		N/A
Cash, cash equivalents, and restricted cash at end of period	N/A			$	559,521

The accompanying statements of operations line items that were adjusted as a result of the adoption of ASU 2017-07 for the three and six months ended June 30, 2017, are summarized as follows:



	For the Three Months Ended June 30, 2017						For the Six Months Ended June 30, 2017
	As Reported			As Adjusted			As Reported		As Adjusted
	(in thousands)
Operating expenses:
Exploration	$	13,072		$	12,983		$	25,050	$	24,800
General and administrative	$	28,460		$	28,237		$	57,684	$	57,054
Total operating expenses	$	268,359		$	268,047		$	475,504	$	474,624

Income (loss) from operations	$	(147,638	)	$	(147,326	)	$	17,955	$	18,835

Other non-operating income, net	$	1,265		$	953		$	1,600	$	720

Schedule of cash and cash equivalents, and restricted cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the accompanying balance sheets:



	As of June 30, 2018		As of December 31, 2017
	(in thousands)
Cash and cash equivalents	$	615,906	$	313,943
Restricted cash	—		—
Total cash, cash equivalents, and restricted cash	$	615,906	$	313,943