CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating revenues:
Total operating revenues		$ 867,478	$ 684,989	$ 2,531,060	$ 1,569,350
Operating costs and expenses:
Depreciation, depletion, amortization and impairment		281,652	196,642	703,928	572,187
Selling, general and administrative		32,820	28,817	101,300	71,147
Merger and integration expenses			9,449	2,738	65,798
Other operating income, net	[1]	(771)	(3,791)	(10,321)	(18,501)
Total operating costs and expenses		947,759	723,005	2,642,447	1,840,241
Operating loss		(80,281)	(38,016)	(111,387)	(270,891)
Other income (expense):
Interest income		817	101	4,600	1,149
Interest expense, net of amount capitalized		(12,376)	(9,584)	(38,668)	(26,929)
Other		281	78	666	226
Total other expense		(11,278)	(9,405)	(33,402)	(25,554)
Loss before income taxes		(91,559)	(47,421)	(144,789)	(296,445)
Income tax benefit		(16,517)	(13,652)	(24,617)	(106,953)
Net loss		$ (75,042)	$ (33,769)	$ (120,172)	$ (189,492)
Net loss per common share:
Basic		$ (0.34)	$ (0.16)	$ (0.55)	$ (0.99)
Diluted		$ (0.34)	$ (0.16)	$ (0.55)	$ (0.99)
Weighted average number of common shares outstanding:
Basic		218,059	211,875	219,635	191,237
Diluted		218,059	211,875	219,635	191,237
Cash dividends per common share		$ 0.04	$ 0.02	$ 0.10	$ 0.06
Contract Drilling
Operating revenues:
Total operating revenues		$ 365,280	$ 301,614	$ 1,043,005	$ 730,453
Operating costs and expenses:
Operating costs and expenses		226,373	186,957	656,630	475,836
Pressure Pumping
Operating revenues:
Total operating revenues		421,606	362,441	1,253,693	793,659
Operating costs and expenses:
Operating costs and expenses		342,498	290,315	1,006,353	643,228
Directional Drilling
Operating revenues:
Total operating revenues		51,556		152,877
Operating costs and expenses:
Operating costs and expenses		44,740		126,114
Other
Operating revenues:
Total operating revenues		29,036	20,934	81,485	45,238
Operating costs and expenses:
Operating costs and expenses		$ 20,447	$ 14,616	$ 55,705	$ 30,546

[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.