CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Operating revenues:
Oil and natural gas		$ 3,967	$ 6,500
Total operating revenues		268,939	657,699
Operating costs and expenses:
Contract drilling		80,898	212,810
Pressure pumping		87,813	212,725
Oil and natural gas		2,090	2,798
Depreciation, depletion, amortization and impairment		176,770	175,382
Selling, general and administrative		17,972	20,537
Other operating (income) expense, net	[1]	(1,345)	9,344
Total operating costs and expenses		364,198	633,596
Operating income (loss)		(95,259)	24,103
Other income (expense):
Interest income		110	283
Interest expense, net of amount capitalized		(10,800)	(8,541)
Other		16
Total other expense		(10,674)	(8,258)
Income (loss) before income taxes		(105,933)	15,845
Income tax expense (benefit):
Current		(23,814)	30,520
Deferred		(11,616)	(23,800)
Total income tax expense (benefit)		(35,430)	6,720
Net income (loss)		$ (70,503)	$ 9,125
Net income (loss) per common share:
Basic		$ (0.48)	$ 0.06
Diluted		$ (0.48)	$ 0.06
Weighted average number of common shares outstanding:
Basic		145,770	144,983
Diluted		145,770	145,745
Cash dividends per common share		$ 0.10	$ 0.10
Contract Drilling
Operating revenues:
Oil and gas services		$ 168,659	$ 401,478
Pressure Pumping
Operating revenues:
Oil and gas services		$ 96,313	$ 249,721

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