Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by operating activities	$ 228,643	$ 369,660	$ 188,305
Cash flows from investing activities:
Capital expenditures	(164,137)	(447,160)	(359,097)
Acquisition of the 50% noncontrolling interest in Geostream	(14,600)	0	0
Proceeds from sale of fixed assets	17,256	17,127	14,100
Acquisitions, net of cash acquired	0	0	(187,058)
Intercompany notes and accounts	0	0	0
Other investing activities, net	17,856	18,451	26,065
Net cash used in investing activities	(160,881)	(428,709)	(520,090)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt	0	0	(421,427)
Payment of bond tender premium	0	0	(39,082)
Proceeds from long-term debt	0	205,000	475,000
Repayment of capital lease obligations	(393)	(1,959)	(4,016)
Proceeds from borrowings on revolving credit facility	220,000	275,000	418,000
Repayments on revolving credit facility	(300,000)	(405,000)	(123,000)
Payment of deferred financing costs	(69)	(4,597)	(16,485)
Repurchases of common stock	(3,196)	(7,519)	(5,681)
Intercompany notes and accounts	0	0	0
Other financing activities, net	(1,834)	13,021	22,775
Net cash provided by (used in) financing activities	(85,492)	73,946	306,084
Effect of changes in exchange rates on cash	87	(4,391)	4,516
Net increase (decrease) in cash and cash equivalents	(17,643)	10,506	(21,185)
Cash and cash equivalents at beginning of period	45,949	35,443	56,628
Cash and cash equivalents at end of period	28,306	45,949	35,443
Parent Company
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by operating activities	0	0	0
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of the 50% noncontrolling interest in Geostream	0
Acquisitions, net of cash acquired			0
Intercompany notes and accounts	0	676	0
Other investing activities, net	0	(676)	0
Net cash used in investing activities	0	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt			(421,427)
Payment of bond tender premium			(39,082)
Proceeds from long-term debt		205,000	475,000
Repayment of capital lease obligations	0	0	0
Proceeds from borrowings on revolving credit facility	220,000	275,000	418,000
Repayments on revolving credit facility	(300,000)	(405,000)	(123,000)
Payment of deferred financing costs	(69)	(4,597)	(16,485)
Repurchases of common stock	(3,196)	(7,519)	(5,681)
Intercompany notes and accounts	68,597	(49,926)	(278,511)
Other financing activities, net	(1,834)	4,986	12,859
Net cash provided by (used in) financing activities	(16,502)	17,944	21,673
Effect of changes in exchange rates on cash	0	0	0
Net increase (decrease) in cash and cash equivalents	(16,502)	17,944	21,673
Cash and cash equivalents at beginning of period	39,617	21,673
Cash and cash equivalents at end of period	23,115	39,617	21,673
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by operating activities	222,364	349,208	187,597
Cash flows from investing activities:
Capital expenditures	(157,443)	(430,045)	(345,215)
Acquisition of the 50% noncontrolling interest in Geostream	(14,600)
Acquisitions, net of cash acquired			(187,058)
Intercompany notes and accounts	(68,597)	49,926	278,511
Other investing activities, net	17,856	19,127	26,065
Net cash used in investing activities	(222,784)	(360,992)	(227,697)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt			0
Payment of bond tender premium			0
Proceeds from long-term debt		0	0
Repayment of capital lease obligations	(393)	(1,959)	(4,016)
Proceeds from borrowings on revolving credit facility	0	0	0
Repayments on revolving credit facility	0	0	0
Payment of deferred financing costs	0	0	0
Repurchases of common stock	0	0	0
Intercompany notes and accounts	0	(676)	0
Other financing activities, net	0	8,035	9,128
Net cash provided by (used in) financing activities	(393)	5,400	5,112
Effect of changes in exchange rates on cash	0	0	0
Net increase (decrease) in cash and cash equivalents	(813)	(6,384)	(34,988)
Cash and cash equivalents at beginning of period	1,601	7,985
Cash and cash equivalents at end of period	788	1,601	7,985
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by operating activities	6,279	20,452	708
Cash flows from investing activities:
Capital expenditures	(6,694)	(17,115)	(13,882)
Acquisition of the 50% noncontrolling interest in Geostream	0
Acquisitions, net of cash acquired			0
Intercompany notes and accounts	0	0	0
Other investing activities, net	0	0	0
Net cash used in investing activities	(6,694)	(17,115)	(13,882)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt			0
Payment of bond tender premium			0
Proceeds from long-term debt		0	0
Repayment of capital lease obligations	0	0	0
Proceeds from borrowings on revolving credit facility	0	0	0
Repayments on revolving credit facility	0	0	0
Payment of deferred financing costs	0	0	0
Repurchases of common stock	0	0	0
Intercompany notes and accounts	0	0	0
Other financing activities, net	0	0	788
Net cash provided by (used in) financing activities	0	0	788
Effect of changes in exchange rates on cash	87	(4,391)	4,516
Net increase (decrease) in cash and cash equivalents	(328)	(1,054)	(7,870)
Cash and cash equivalents at beginning of period	4,731	5,785
Cash and cash equivalents at end of period	4,403	4,731	5,785
Consolidation, Eliminations
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by operating activities	0	0	0
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of the 50% noncontrolling interest in Geostream	0
Acquisitions, net of cash acquired			0
Intercompany notes and accounts	68,597	(50,602)	(278,511)
Other investing activities, net	0	0	0
Net cash used in investing activities	68,597	(50,602)	(278,511)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt			0
Payment of bond tender premium			0
Proceeds from long-term debt		0	0
Repayment of capital lease obligations	0	0	0
Proceeds from borrowings on revolving credit facility	0	0	0
Repayments on revolving credit facility	0	0	0
Payment of deferred financing costs	0	0	0
Repurchases of common stock	0	0	0
Intercompany notes and accounts	(68,597)	50,602	278,511
Other financing activities, net	0	0	0
Net cash provided by (used in) financing activities	(68,597)	50,602	278,511
Effect of changes in exchange rates on cash	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0	$ 0