Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2020

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Nine Months Ended September 30,
	2020		2019
	(in thousands)
Supplemental cash flow information:
Cash payments (receipts) for:
Interest, net of capitalized interest	$	51,556	$	41,483
Income taxes	(204)		261
Non-cash investing and financing activities:
Change in accounts payable related to capital expenditures	$	(31,403)	$	(32,943)
Change in asset retirement obligations, with a corresponding change to crude oil and natural gas properties, net of disposals	44,339		13,493
Change in accounts payable related to the purchase and retirement of treasury shares	—		2,818
Issuance of common stock for the acquisition of crude oil and natural gas properties, net	1,009,015		—
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	6,714	$	4,107
Operating cash flows from finance leases	155		193
ROU assets obtained in exchange for lease obligations:
Operating leases	$	4,217	$	1,428
Finance leases	703		2,323

Subsequent to the filing of our Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2019, we identified an immaterial error in our condensed consolidated statement of cash flows related to cash paid for capital expenditures for development of crude oil and natural gas properties for the period ended September 30, 2019. Our balance sheet and statement of operations for the relevant period were not impacted. We evaluated the error under the guidance of Accounting Standards Codification 250, Accounting Changes and Error Corrections ("ASC 250"). Based on the guidance in ASC 250, we determined that the error did not have a material impact on our previously-issued financial statements or those of the period of correction.

The error resulted in an overstatement of cash flows from operations of $24.8 million and an overstatement of cash used in investing activities of $24.8 million in each period as follows:

	Nine Months Ended
	September 30, 2019
	(dollars in thousands)
Cash flows from operating activities, as reported	$	675,725
Adjustment	(24,753)
Cash flows from operating activities, as adjusted	$	650,972
Cash flows from investing activities, as reported	$	(596,973)
Adjustment	24,753
Cash flows from investing activities, as adjusted	$	(572,220)