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Net Income (Loss) per Share - Additional Information (Details) - $ / shares
Dec. 15, 2016
Dec. 31, 2016
Dec. 31, 2013
Nov. 27, 2013
Debt Instrument [Line Items]        
Settlement of tangible equity units, Shares 7,857,000      
6% Tangible Equity Units        
Debt Instrument [Line Items]        
Interest rate percentage     6.00% 6.00%
Convertible Debt        
Debt Instrument [Line Items]        
Exercise price of unit   $ 24.49    
Maximum | 6% Tangible Equity Units        
Debt Instrument [Line Items]        
Settlement of tangible equity units, Shares 7,857,000