Net Income (Loss) per Share - Earnings Attributable to Common Shareholders and Weighted Average Common Shares Outstanding (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Consolidated net income (loss)	$ (212,371)	$ 17,088	$ 35,061
Less: Net (income) attributable to noncontrolling interest	(676)	(505)	(5,740)
Income (loss) available for diluted earnings per share	(213,047)	16,583	29,321
Less: Undistributed net income allocated to participating securities	0	(3,018)	(585)
Income (loss) available to common shareholders for basic earnings per share	$ (213,047)	$ 13,565	$ 28,736
Weighted average common shares outstanding - basic	34,266	35,317	35,365
Weighted average common shares upon conversion of participating securities	0	7,857	835
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	422	613
Weighted average common shares outstanding - diluted	34,266	43,596	36,813
Anti-dilutive awards excluded from diluted weighted average shares outstanding	10,864	2,238	1,803