Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Total revenues	$ 324,797	$ 340,400	$ 954,871	$ 1,072,815
Expenses:
General and administrative, including stock-based compensation of $2,837 and $2,587 in three months and $8,966 and $10,237 in the nine months ended September 30, 2013 and 2012, respectively	43,179	43,742	134,457	133,213
Depreciation and amortization	53,623	48,272	155,471	137,792
Loss on disposal of assets	411	424	2,290	3,123
Total expenses	319,956	314,829	948,521	966,861
Operating income	4,841	25,571	6,350	105,954
Other income (expense):
Interest expense	(16,927)	(15,078)	(50,541)	(45,133)
Interest income	10	8	40	31
Other income	232	260	567	624
Income (loss) from continuing operations before income taxes	(11,844)	10,761	(43,584)	61,476
Income tax benefit (expense)	4,888	(4,098)	15,054	(22,087)
Net income (loss)	(6,956)	6,663	(28,530)	39,389
Earnings per share of common stock:
Basic	$ (0.17)	$ 0.17	$ (0.70)	$ 0.97
Diluted	$ (0.17)	$ 0.16	$ (0.70)	$ 0.95
Completion And Remedial Services [Member]
Revenues:
Total revenues	127,119	143,348	377,696	464,328
Expenses:
Depreciation and amortization	16,248	14,763	47,063	41,258
Total expenses	82,959	86,988	247,813	277,111
Fluid Services [Member]
Revenues:
Total revenues	86,121	84,422	256,052	270,339
Expenses:
Depreciation and amortization	15,999	13,691	44,984	38,016
Total expenses	59,673	57,411	176,844	178,479
Well Servicing [Member]
Revenues:
Total revenues	97,783	97,502	279,379	292,127
Expenses:
Depreciation and amortization	15,494	14,113	45,946	43,028
Total expenses	70,983	67,949	203,586	207,063
Contract Drilling
Revenues:
Total revenues	13,774	15,128	41,744	46,021
Expenses:
Total expenses	$ 9,128	$ 10,043	$ 28,060	$ 30,080