• Filing Date: 2017-02-22
  • Form Type: 10-K
  • Description: Annual report
v3.6.0.2
Fair Value Measurements - Schedule of Fair Value Information for Financial Assets and Liabilities Carried on Balance Sheet (Parenthetical) (Detail)
Dec. 31, 2016
Aug. 16, 2016
Jan. 14, 2016
Dec. 31, 2015
Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed annual rate of interest 8.00%      
Convertible Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.875%      
4% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 4.00%   4.00%  
3.75% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.75% 3.75%    
Estimate of Fair Value Measurement [Member] | Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed annual rate of interest 8.00%     8.00%
Estimate of Fair Value Measurement [Member] | Convertible Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.875%     3.875%
Estimate of Fair Value Measurement [Member] | 4% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 4.00%      
Estimate of Fair Value Measurement [Member] | 3.75% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.75%      
Carrying Value [Member] | Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed annual rate of interest 8.00%     8.00%
Carrying Value [Member] | Convertible Senior Notes [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.875%     3.875%
Carrying Value [Member] | 4% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 4.00%      
Carrying Value [Member] | 3.75% Promissory Note [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Debt instrument stated interest rate 3.75%