Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Total revenues	$ 120,004	$ 193,596	$ 250,361	$ 455,317
Expenses:
Expenses	104,694	156,574	216,681	351,884
General and administrative, including stock-based compensation of $2,277 and $3,270 in three months ended June 30, 2016 and 2015, and $5,117 and $7,239 in the six months ended June 30, 2016 and 2015, respectively	27,078	35,673	56,640	74,877
Depreciation and amortization	54,847	60,231	110,999	121,160
Loss (gain) on disposal of assets	336	(57)	261	(9)
Total expenses	186,955	252,421	384,581	547,912
Operating loss	(66,951)	(58,825)	(134,220)	(92,595)
Other income (expense):
Interest expense	(22,521)	(16,841)	(43,235)	(33,704)
Interest income	7	4	9	10
Other income	244	215	340	335
Loss before income taxes	(89,221)	(75,447)	(177,106)	(125,954)
Income tax benefit (expense)	(662)	27,152	3,884	45,035
Net loss	$ (89,883)	$ (48,295)	$ (173,222)	$ (80,919)
Loss per share of common stock:
Basic (dollars per share)	$ (2.11)	$ (1.20)	$ (4.14)	$ (2.00)
Diluted (dollars per share)	$ (2.11)	$ (1.20)	$ (4.14)	$ (2.00)
Operating Segments | Completion and remedial services
Revenues:
Total revenues	$ 36,228	$ 69,056	$ 75,924	$ 181,831
Expenses:
Expenses	32,860	57,670	67,648	138,921
Depreciation and amortization	18,954	21,056	38,359	42,356
Operating Segments | Fluid services
Revenues:
Total revenues	45,491	63,704	95,741	137,506
Expenses:
Expenses	38,619	48,381	79,786	102,512
Depreciation and amortization	16,145	17,515	32,673	35,233
Operating Segments | Well servicing
Revenues:
Total revenues	36,824	56,500	75,731	120,168
Expenses:
Expenses	31,847	47,035	66,318	99,437
Depreciation and amortization	13,886	15,284	28,102	30,745
Operating Segments | Contract drilling
Revenues:
Total revenues	1,461	4,336	2,965	15,812
Expenses:
Expenses	1,368	3,488	2,929	11,014
Depreciation and amortization	$ 3,201	$ 3,512	$ 6,479	$ 7,064