Segment Information - Items Not Allocated to Segments (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Income (loss) before taxes		$ (180,412)	$ 25,240	$ 36,529
Items Not Allocated To Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) before taxes	[1]	(63,086)	(54,479)	(57,291)
Items Not Allocated To Segments [Member] | General and Administrative Expense [Member]
Segment Reporting Information [Line Items]
Income (loss) before taxes		(24,802)	(21,229)	(20,597)
Items Not Allocated To Segments [Member] | Share-based compensation expense [Member]
Segment Reporting Information [Line Items]
Income (loss) before taxes		(4,474)	(3,417)	(16,809)
Items Not Allocated To Segments [Member] | Interest expense [Member]
Segment Reporting Information [Line Items]
Income (loss) before taxes		(34,066)	(30,286)	(20,004)
Items Not Allocated To Segments [Member] | Other corporate non-operating income [Member]
Segment Reporting Information [Line Items]
Income (loss) before taxes		$ 256	$ 453	$ 119

[1] Items not allocated to segments consist of: For the Year 2015 2014 2013 (In thousands)General and administrative expense$(24,802) $(21,229) $(20,597)Share-based and long-term incentive compensation expense(4,474) (3,417) (16,809)Interest expense(34,066) (30,286) (20,004)Other corporate non-operating income256 453 119 $(63,086) $(54,479) $(57,291)