CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating revenues:
Total operating revenues	$ 357,885,000	$ 207,141,000	$ 890,588,000	$ 903,448,000
Operating costs and expenses:
Depreciation, depletion, amortization and impairment	141,065,000	157,319,000	437,984,000	517,201,000
Impairment of goodwill	0	0	0	395,060,000
Selling, general and administrative	22,063,000	22,355,000	68,176,000	76,692,000
Merger and integration expenses	918,000		2,066,000
Credit loss expense	0	0	0	5,606,000
Restructuring expenses				38,338,000
Other operating (income) expenses, net	(1,219,000)	776,000	(3,743,000)	5,980,000
Total operating costs and expenses	447,894,000	321,707,000	1,207,534,000	1,671,508,000
Operating loss	(90,009,000)	(114,566,000)	(316,946,000)	(768,060,000)
Other income (expense):
Interest income	37,000	238,000	196,000	1,229,000
Interest expense, net of amount capitalized	(10,683,000)	(11,288,000)	(31,396,000)	(33,496,000)
Other	14,000	512,000	840,000	682,000
Total other expense	(10,632,000)	(10,538,000)	(30,360,000)	(31,585,000)
Loss before income taxes	(100,641,000)	(125,104,000)	(347,306,000)	(799,645,000)
Income tax benefit	(17,643,000)	(12,993,000)	(54,586,000)	(102,480,000)
Net loss	$ (82,998,000)	$ (112,111,000)	$ (292,720,000)	$ (697,165,000)
Net loss per common share:
Basic	$ (0.44)	$ (0.60)	$ (1.55)	$ (3.70)
Diluted	$ (0.44)	$ (0.60)	$ (1.55)	$ (3.70)
Weighted average number of common shares outstanding:
Basic	188,965	187,280	188,355	188,193
Diluted	188,965	187,280	188,355	188,193
Cash dividends per common share	$ 0.02	$ 0.02	$ 0.06	$ 0.08
Contract Drilling
Operating revenues:
Total operating revenues	$ 157,925,000	$ 115,054,000	$ 433,158,000	$ 553,552,000
Operating costs and expenses:
Operating costs and expenses	111,537,000	59,117,000	291,049,000	309,664,000
Pressure Pumping
Operating revenues:
Total operating revenues	152,634,000	71,973,000	340,464,000	256,613,000
Operating costs and expenses:
Operating costs and expenses	134,726,000	63,721,000	313,556,000	234,844,000
Directional Drilling
Operating revenues:
Total operating revenues	31,728,000	10,271,000	76,267,000	56,498,000
Operating costs and expenses:
Operating costs and expenses	28,360,000	9,754,000	67,367,000	54,348,000
Other
Operating revenues:
Total operating revenues	15,598,000	9,843,000	40,699,000	36,785,000
Operating costs and expenses:
Operating costs and expenses	$ 10,444,000	$ 8,665,000	$ 31,079,000	$ 33,775,000