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Net Income (Loss) per Share - Additional Information (Detail) - $ / shares
Dec. 15, 2016
Mar. 31, 2017
Dec. 31, 2016
Six Percent Tangible Equity Units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Interest rate percentage     6.00%
Convertible Debt      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Interest rate percentage   3.75% 3.75%
Conversion price of convertible notes   $ 24.49  
Maximum | Six Percent Tangible Equity Units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Settlement of tangible equity units, shares 7,857,000