CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenues:
Total operating revenues		$ 675,765	$ 854,418	$ 1,379,936	$ 1,663,582
Operating costs and expenses:
Depreciation, depletion, amortization and impairment		208,688	212,384	423,098	422,276
Selling, general and administrative		34,894	35,663	67,449	68,480
Provision for bad debts		3,594		3,594
Merger and integration expenses			747		2,738
Other operating expenses (income), net	[1]	9,071	(7,129)	335	(9,550)
Total operating costs and expenses		723,890	863,422	1,451,444	1,694,688
Operating loss		(48,125)	(9,004)	(71,508)	(31,106)
Other income (expense):
Interest income		1,756	2,360	2,788	3,783
Interest expense, net of amount capitalized		(13,298)	(12,667)	(26,282)	(26,292)
Other		92	216	209	385
Total other expense		(11,450)	(10,091)	(23,285)	(22,124)
Loss before income taxes		(59,575)	(19,095)	(94,793)	(53,230)
Income tax benefit		(10,128)	(8,382)	(16,732)	(8,100)
Net loss		$ (49,447)	$ (10,713)	$ (78,061)	$ (45,130)
Net loss per common share:
Basic		$ (0.24)	$ (0.05)	$ (0.37)	$ (0.21)
Diluted		$ (0.24)	$ (0.05)	$ (0.37)	$ (0.21)
Weighted average number of common shares outstanding:
Basic		207,499	220,093	209,671	220,436
Diluted		207,499	220,093	209,671	220,436
Cash dividends per common share		$ 0.04	$ 0.04	$ 0.08	$ 0.06
Contract Drilling
Operating revenues:
Total operating revenues		$ 348,138	$ 349,922	$ 720,530	$ 677,725
Operating costs and expenses:
Operating costs and expenses		201,792	217,674	420,994	430,257
Pressure Pumping
Operating revenues:
Total operating revenues		251,008	425,303	498,609	832,087
Operating costs and expenses:
Operating costs and expenses		206,137	342,885	408,885	663,855
Directional Drilling
Operating revenues:
Total operating revenues		50,218	52,705	103,177	101,321
Operating costs and expenses:
Operating costs and expenses		42,102	43,685	87,704	81,374
Other
Operating revenues:
Total operating revenues		26,401	26,488	57,620	52,449
Operating costs and expenses:
Operating costs and expenses		$ 17,612	$ 17,513	$ 39,385	$ 35,258

[1] Other operating income, net includes net gains associated with the disposal of assets related to corporate strategy decisions of the executive management group. Accordingly, the related gains have been excluded from the operating results of specific segments. This caption also includes certain legal-related expenses and settlements, net of insurance reimbursements.