Supplemental Guarantor Condensed Consolidating Financial Statements - Impact of Revisions on Supplemental Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 7,864	$ (6,488)
Cash flows from investing activities	(50,032)	(16,351)
Cash flows from financing activities	169,183	(41,424)
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(119)	(29)
Cash flows from investing activities	(196,400)
Cash flows from financing activities	199,374	36
Parent Guarantor [Member] | As Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(29)
Cash flows from financing activities		36
Parent Guarantor [Member] | As Revised [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(29)
Cash flows from financing activities		36
Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(54,821)	61,692
Cash flows from investing activities	(8,000)	(4,000)
Cash flows from financing activities	64,278	(86,003)
Issuers [Member] | As Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		61,692
Cash flows from financing activities		(90,003)
Issuers [Member] | As Revised [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		61,692
Cash flows from investing activities		(4,000)
Cash flows from financing activities		(86,003)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	18,723	(17,783)
Cash flows from investing activities	(146,524)	(218,353)
Cash flows from financing activities	240,930	184,224
Guarantor Subsidiaries [Member] | As Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(19,911)
Cash flows from investing activities		(220,820)
Cash flows from financing activities		188,834
Guarantor Subsidiaries [Member] | As Revised [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(17,783)
Cash flows from investing activities		(218,353)
Cash flows from financing activities		184,224
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	44,081	(50,368)
Cash flows from investing activities	(634)	1,193
Cash flows from financing activities	(33,873)	65,128
Non-Guarantor Subsidiaries [Member] | As Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(48,240)
Cash flows from investing activities		3,660
Cash flows from financing activities		60,518
Non-Guarantor Subsidiaries [Member] | As Revised [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities		(50,368)
Cash flows from investing activities		1,193
Cash flows from financing activities		65,128
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities
Cash flows from investing activities	301,526	204,809
Cash flows from financing activities	(301,526)	(204,809)
Eliminations [Member] | As Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from investing activities		200,809
Cash flows from financing activities		(200,809)
Eliminations [Member] | As Revised [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from investing activities		204,809
Cash flows from financing activities		$ (204,809)