Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Total revenues	$ 340,400	$ 345,987	$ 1,072,815	$ 888,896
Expenses:
General and administrative, including stock-based compensation of $2,993 and $2,162 in three months and $8,365 and $5,920 in nine months ended September 30, 2012 and 2011, respectively	44,063	38,049	130,961	103,528
Depreciation and amortization	48,272	41,348	137,792	109,112
(Gain) loss on disposal of assets	424	65	3,123	(698)
Total expenses	315,150	288,802	964,609	762,685
Operating income	25,250	57,185	108,206	126,211
Other income (expense):
Interest expense	(15,078)	(15,397)	(45,133)	(38,581)
Interest income	8	1,538	31	1,566
Loss on early extinguishment of debt				(49,366)
Other income (expense)	260	183	624	442
Income from continuing operations before income taxes	10,440	43,509	63,728	40,272
Income tax	(3,976)	(16,914)	(22,896)	(15,620)
Net income	6,464	26,595	40,832	24,652
Earnings per share of common stock:
Basic	$ 0.16	$ 0.66	$ 1.00	$ 0.61
Diluted	$ 0.16	$ 0.64	$ 0.98	$ 0.59
Completion and remedial services
Revenues:
Total revenues	143,348	157,121	464,328	376,435
Expenses:
Service Expenses	86,988	84,470	277,111	208,230
Depreciation and amortization	14,763	12,647	41,258	33,374
Fluid services
Revenues:
Total revenues	84,422	87,444	270,339	241,204
Expenses:
Service Expenses	57,411	54,731	178,479	154,647
Depreciation and amortization	13,691	11,081	38,016	29,241
Well servicing
Revenues:
Total revenues	97,502	89,710	292,127	242,738
Expenses:
Service Expenses	67,949	62,167	207,063	168,016
Depreciation and amortization	14,113	13,409	43,028	35,384
Contract drilling
Revenues:
Total revenues	15,128	11,712	46,021	28,519
Expenses:
Service Expenses	$ 10,043	$ 7,972	$ 30,080	$ 19,850