• Filing Date: 2015-03-10
  • Form Type: 10-K
  • Description: Annual report
v2.4.1.9
Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 11, 2013
Debt Instrument [Line Items]      
Debt instrument stated interest rate   3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage  
Senior Notes [Member]      
Debt Instrument [Line Items]      
Fixed annual rate of interest 8.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jan. 30, 2020    
Convertible Senior Notes [Member]      
Debt Instrument [Line Items]      
Debt instrument stated interest rate 3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Debt instrument, maturity date Mar. 15, 2019