GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Income Statements, Captions [Line Items]
Net income (loss)	$ 29,418	$ (18,728)	$ (79,700)
Total comprehensive income (loss)	29,418	(18,728)	(79,700)
Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Net income (loss)	(25,076)	129,572	286,175
Total comprehensive income (loss)	(25,076)	129,572	286,175
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Net income (loss)	29,418	(18,728)	(79,700)
Total comprehensive income (loss)	29,418	(18,728)	(79,700)
Issuer [Member]
Condensed Income Statements, Captions [Line Items]
Net income (loss)	(28,420)	(80,643)	(134,341)
Total comprehensive income (loss)	(28,420)	(80,643)	(134,341)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net income (loss)	53,126	(49,602)	(151,918)
Total comprehensive income (loss)	53,126	(49,602)	(151,918)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net income (loss)	370	673	84
Total comprehensive income (loss)	$ 370	$ 673	$ 84