Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Total revenues	$ 361,518	$ 296,855	$ 732,415	$ 542,909
Expenses:
General and administrative, including stock-based compensation of $3,200 and $2,078 in three months and $5,372 and $3,758 in six months ended June 30, 2012 and 2011, respectively	45,540	34,138	86,898	65,479
Depreciation and amortization	45,536	34,784	89,520	67,764
(Gain) loss on disposal of assets	980	942	2,699	(763)
Total expenses	325,070	255,181	649,459	473,883
Operating income	36,448	41,674	82,956	69,026
Other income (expense):
Interest expense	(14,832)	(11,842)	(30,055)	(23,184)
Interest income	11	23	23	28
Loss on early extinguishment of debt				(49,366)
Other income (expense)	215	102	364	259
Income (loss) from continuing operations before income taxes	21,842	29,957	53,288	(3,237)
Income tax benefit (expense)	(7,105)	(13,407)	(18,920)	1,294
Net income (loss)	14,737	16,550	34,368	(1,943)
Earnings per share of common stock:
Basic	$ 0.36	$ 0.41	$ 0.84	$ (0.05)
Diluted	$ 0.36	$ 0.40	$ 0.82	$ (0.05)
Completion and remedial services
Revenues:
Total revenues	156,560	121,807	320,980	219,314
Expenses:
Service Expenses	93,098	68,827	190,123	123,760
Depreciation and amortization	13,644	9,841	26,495	17,909
Fluid services
Revenues:
Total revenues	90,592	81,415	185,917	153,760
Expenses:
Service Expenses	58,221	51,688	121,068	99,916
Depreciation and amortization	12,530	10,359	24,326	19,764
Well servicing
Revenues:
Total revenues	98,723	83,881	194,625	153,028
Expenses:
Service Expenses	71,864	57,409	139,114	105,849
Depreciation and amortization	14,574	10,398	28,915	22,351
Contract drilling
Revenues:
Total revenues	15,643	9,752	30,893	16,807
Expenses:
Service Expenses	$ 9,831	$ 7,393	$ 20,037	$ 11,878