Additional Balance Sheet Information - Schedule of Additional Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts receivable, net
Trade accounts	$ 159,167	$ 362,973
Joint interest accounts	393	101
Other accounts	863	567
Accounts receivable, gross	160,423	363,641
Allowance for doubtful accounts	(1,184)	(1,238)
Accounts receivable, net	159,239	362,403
Other assets
Deferred compensation plan	17,080	14,699
Debt issuance costs	9,450	4,572
Income taxes receivable	0	8,165
Operating lease right-of-use assets	37,715	0
Other accounts	74	61
Other assets	64,319	27,497
Accounts payable
Trade accounts	29,157	30,033
Royalty and other owners	30,242	61,507
Accrued transportation	50,795	50,540
Accrued capital costs	44,643	43,207
Taxes other than income	13,105	19,824
Income taxes payable	0	1,134
Other accounts	4,790	35,694
Accounts payable	172,732	241,939
Accrued liabilities
Employee benefits	18,411	21,761
Taxes other than income	3,660	1,472
Operating lease liabilities	4,280	0
Asset retirement obligations	500	1,000
Other accounts	929	994
Accrued liabilities	27,780	25,227
Other liabilities
Deferred compensation plan	25,791	25,780
Operating lease liabilities	33,326	0
Other accounts	8,529	34,391
Other liabilities	$ 67,646	$ 60,171