Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2021

Supplemental Cash Flow Elements [Abstract]

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

	Six Months Ended June 30,
	2021		2020
	(in thousands)
Supplemental cash flow information:
Cash payments (receipts) for:
Interest, net of capitalized interest	$	30,855	$	39,168
Income taxes	(1,125)		(204)
Non-cash investing and financing activities:
Change in accounts payable related to capital expenditures	$	61,310	$	(7,223)
Change in asset retirement obligations, with a corresponding change to crude oil and natural gas properties, net of disposals	(1,729)		44,082
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	$	4,054	$	4,421
Operating cash flows from finance leases	65		109
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	1,066	$	4,217
Finance leases	1,466		703