CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating revenues:
Total operating revenues	$ 291,774,000	$ 250,380,000	$ 532,703,000	$ 696,307,000
Operating costs and expenses:
Depreciation, depletion, amortization and impairment	144,037,000	173,085,000	296,919,000	359,882,000
Impairment of goodwill				395,060,000
Selling, general and administrative	23,555,000	23,991,000	46,113,000	54,337,000
Merger and integration expenses	1,148,000		1,148,000
Credit loss expense	0	4,551,000	0	5,606,000
Restructuring expenses		38,338,000		38,338,000
Other operating expenses, net	(2,789,000)	4,753,000	(2,524,000)	5,204,000
Total operating costs and expenses	401,184,000	409,464,000	759,640,000	1,349,801,000
Operating loss	(109,410,000)	(159,084,000)	(226,937,000)	(653,494,000)
Other income (expense):
Interest income	20,000	334,000	159,000	991,000
Interest expense, net of amount capitalized	(10,704,000)	(10,984,000)	(20,713,000)	(22,208,000)
Other	812,000	85,000	826,000	170,000
Total other expense	(9,872,000)	(10,565,000)	(19,728,000)	(21,047,000)
Loss before income taxes	(119,282,000)	(169,649,000)	(246,665,000)	(674,541,000)
Income tax benefit	(15,973,000)	(19,317,000)	(36,943,000)	(89,487,000)
Net loss	$ (103,309,000)	$ (150,332,000)	$ (209,722,000)	$ (585,054,000)
Net loss per common share:
Basic	$ (0.55)	$ (0.81)	$ (1.12)	$ (3.10)
Diluted	$ (0.55)	$ (0.81)	$ (1.12)	$ (3.10)
Weighted average number of common shares outstanding:
Basic	188,408	186,633	188,044	188,654
Diluted	188,408	186,633	188,044	188,654
Cash dividends per common share	$ 0.02	$ 0.02	$ 0.04	$ 0.06
Contract Drilling
Operating revenues:
Total operating revenues	$ 141,732,000	$ 171,134,000	$ 275,233,000	$ 438,498,000
Operating costs and expenses:
Operating costs and expenses	100,134,000	87,127,000	179,512,000	250,547,000
Pressure Pumping
Operating revenues:
Total operating revenues	111,991,000	59,533,000	187,830,000	184,640,000
Operating costs and expenses:
Operating costs and expenses	102,320,000	56,268,000	178,830,000	171,123,000
Directional Drilling
Operating revenues:
Total operating revenues	24,869,000	11,742,000	44,539,000	46,227,000
Operating costs and expenses:
Operating costs and expenses	22,370,000	12,265,000	39,007,000	44,594,000
Other
Operating revenues:
Total operating revenues	13,182,000	7,971,000	25,101,000	26,942,000
Operating costs and expenses:
Operating costs and expenses	$ 10,409,000	$ 9,086,000	$ 20,635,000	$ 25,110,000