Net Income (Loss) per Share - Potentially Dilutive Securities Not Included in Computation of Diluted Net Loss Per Share (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SARs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the computation of diluted net loss per share (in shares)	480	548	28
Anti dilutive securities excluded from computation of earnings per share, weighted average price (in dollars per share)	$ 10.67	$ 10.72	$ 12.47
Restricted stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the computation of diluted net loss per share (in shares)	3,481	3,755	748
Anti dilutive securities excluded from computation of earnings per share, weighted average price (in dollars per share)			$ 8.22
DSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the computation of diluted net loss per share (in shares)	90	23	0