Guarantor/Non-Guarantor Condensed Consolidated Financial Statements - Cash Flows (Unaudited) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:	$ 144,879	$ 98,351	$ 123,313
Cash flows from investing activities:
Purchases of property and equipment	(210,066)	(131,003)	(114,712)
Proceeds from sale of property and equipment	5,550	2,331	767
Proceeds from insurance recoveries	0	531	36
Proceeds from sale of auction rate securities	12,569	0	0
Net cash used in investing activities	(307,484)	(129,481)	(113,909)
Cash flows from financing activities:
Debt repayments	(113,158)	(256,856)	(17,298)
Proceeds from issuance of debt	250,750	274,375	0
Debt issuance costs	(7,285)	(4,865)	(2,560)
Proceeds from exercise of options	2,884	238	0
Proceeds from stock, net of offering costs	94,343	0	24,043
Purchase of treasury stock	(743)	(130)	(31)
Net cash provided by financing activities	226,791	12,762	4,154
Net increase (decrease) in cash and cash equivalents	64,186	(18,368)	13,558
Beginning cash and cash equivalents	22,011	40,379	26,821
Ending cash and cash equivalents	86,197	22,011	40,379
Parent [Member]
Cash flows from operating activities:	(164,032)	(31,841)	26,598
Cash flows from investing activities:
Purchases of property and equipment	(485)	(478)	(404)
Proceeds from sale of property and equipment	7	0	0
Proceeds from insurance recoveries		0	0
Proceeds from sale of auction rate securities	12,569
Net cash used in investing activities	12,091	(478)	(404)
Cash flows from financing activities:
Debt repayments	(111,813)	(254,914)	(15,152)
Proceeds from issuance of debt	250,750	274,375
Debt issuance costs	(7,285)	(4,865)	(2,560)
Proceeds from exercise of options	2,884	238
Proceeds from stock, net of offering costs	94,343		24,043
Purchase of treasury stock	(743)	(130)	(31)
Net cash provided by financing activities	228,136	14,704	6,300
Net increase (decrease) in cash and cash equivalents	76,195	(17,615)	32,494
Beginning cash and cash equivalents	15,737	33,352	858
Ending cash and cash equivalents	91,932	15,737	33,352
Guarantor Subsidiaries [Member]
Cash flows from operating activities:	300,198	115,650	91,432
Cash flows from investing activities:
Purchases of property and equipment	(200,887)	(114,313)	(106,628)
Proceeds from sale of property and equipment	5,532	2,290	694
Proceeds from insurance recoveries		531	36
Proceeds from sale of auction rate securities	0
Net cash used in investing activities	(310,892)	(112,832)	(105,898)
Cash flows from financing activities:
Debt repayments	(1,345)	(1,942)	(2,146)
Proceeds from issuance of debt	0	0
Debt issuance costs	0	0	0
Proceeds from exercise of options	0	0
Proceeds from stock, net of offering costs	0		0
Purchase of treasury stock	0	0	0
Net cash provided by financing activities	(1,345)	(1,942)	(2,146)
Net increase (decrease) in cash and cash equivalents	(12,039)	876	(16,612)
Beginning cash and cash equivalents	(1,840)	(2,716)	13,896
Ending cash and cash equivalents	(13,879)	(1,840)	(2,716)
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:	8,713	14,542	5,283
Cash flows from investing activities:
Purchases of property and equipment	(8,694)	(16,212)	(7,680)
Proceeds from sale of property and equipment	11	41	73
Proceeds from insurance recoveries		0	0
Proceeds from sale of auction rate securities	0
Net cash used in investing activities	(8,683)	(16,171)	(7,607)
Cash flows from financing activities:
Debt repayments	0	0	0
Proceeds from issuance of debt	0	0
Debt issuance costs	0	0	0
Proceeds from exercise of options	0	0
Proceeds from stock, net of offering costs	0		0
Purchase of treasury stock	0	0	0
Net cash provided by financing activities	0	0	0
Net increase (decrease) in cash and cash equivalents	30	(1,629)	(2,324)
Beginning cash and cash equivalents	8,114	9,743	12,067
Ending cash and cash equivalents	8,144	8,114	9,743
Eliminations [Member]
Cash flows from operating activities:	0	0	0
Cash flows from investing activities:
Purchases of property and equipment	0	0	0
Proceeds from sale of property and equipment	0	0	0
Proceeds from insurance recoveries		0	0
Proceeds from sale of auction rate securities	0
Net cash used in investing activities	0	0	0
Cash flows from financing activities:
Debt repayments	0	0	0
Proceeds from issuance of debt	0	0
Debt issuance costs	0	0	0
Proceeds from exercise of options	0	0
Proceeds from stock, net of offering costs	0		0
Purchase of treasury stock	0	0	0
Net cash provided by financing activities	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Beginning cash and cash equivalents	0	0	0
Ending cash and cash equivalents	0	0	0
Go-Coil [Member]
Cash flows from investing activities:
Acquisition of production services businesses	(109,035)	0	0
Go-Coil [Member] | Parent [Member]
Cash flows from investing activities:
Acquisition of production services businesses	0
Go-Coil [Member] | Guarantor Subsidiaries [Member]
Cash flows from investing activities:
Acquisition of production services businesses	(109,035)
Go-Coil [Member] | Non-Guarantor Subsidiaries [Member]
Cash flows from investing activities:
Acquisition of production services businesses	0
Go-Coil [Member] | Eliminations [Member]
Cash flows from investing activities:
Acquisition of production services businesses	0
Other production services businesses [Member]
Cash flows from investing activities:
Acquisition of production services businesses	(6,502)	(1,340)	0
Other production services businesses [Member] | Parent [Member]
Cash flows from investing activities:
Acquisition of production services businesses	0	0
Other production services businesses [Member] | Guarantor Subsidiaries [Member]
Cash flows from investing activities:
Acquisition of production services businesses	(6,502)	(1,340)
Other production services businesses [Member] | Non-Guarantor Subsidiaries [Member]
Cash flows from investing activities:
Acquisition of production services businesses	0	0
Other production services businesses [Member] | Eliminations [Member]
Cash flows from investing activities:
Acquisition of production services businesses	$ 0	$ 0