Supplemental disclosures to the consolidated statements of cash flows (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Net cash provided by operating activities included:
Cash payments for interest		$ 30,896	$ 5,755
Interest capitalized		(9,431)	(7,155)
Cash payments for reorganization items		1,244	2,161
Non-cash investing activities included:
Asset retirement obligation additions and revisions		629	1,234
Leasing right of use asset additions (see Note 5: Leases)		1,643
Change in accrued oil and gas capital expenditures		17,272	$ 7,222
Non-cash financing activities included:
Discharge of financing lease obligations (See Note 5: Leases)	$ 9,832	$ 9,832