• Filing Date: 2020-03-06
  • Form Type: 10-K
  • Description: Annual report
v3.19.3.a.u2
Fair Value Measurements - Components of Long-Term Debt and Methods Used in Estimating Fair Values (Detail)
12 Months Ended
Dec. 31, 2019
3.875% Convertible Senior Notes [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2019
Valuation Methodology Quoted price
4.25% Convertible Senior Notes [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2037
Valuation Methodology Quoted price
3.95% Promissory Note [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2020
Valuation Methodology Discounted cash flow method/Level 3 inputs
4% Promissory Note [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2031
Valuation Methodology Discounted cash flow method/Level 3 inputs
3.75% Callable Promissory Note [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2036
Valuation Methodology Discounted cash flow method/Level 3 inputs
4.55% Promissory Note [Member]  
Debt Instrument [Line Items]  
Debt instrument, maturity date 2036
Valuation Methodology Discounted cash flow method/Level 3 inputs