Net Income (Loss) Per Share - Additional Information (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Line Items]
Exercisable options outstanding that enable to purchase shares	825	800	900
Restricted stock
Earnings Per Share [Line Items]
Exercisable options outstanding that enable to purchase shares	141
Shares with dilutive effect and included in computation of diluted income (loss) per share	26		17
Equity option
Earnings Per Share [Line Items]
Shares with dilutive effect and included in computation of diluted income (loss) per share	319	298	145
Options excluded from computation of diluted income (loss) per share due to anti-dilutive effect	260	295	412