XML 46 R52.htm IDEA: XBRL DOCUMENT v2.4.0.8
Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months $ 174,876
Unrealized Losses, Less than 12 Months (447)
Fair Value, Greater than 12 Months 21,574
Unrealized Losses, Greater than 12 Months (471)
Total Fair Value 196,450
Total Unrealized Losses (918)
Treasury Bills [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 61,966
Unrealized Losses, Less than 12 Months (139)
Total Fair Value 61,966
Total Unrealized Losses (139)
Corporate Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 58,258
Unrealized Losses, Less than 12 Months (153)
Fair Value, Greater than 12 Months 3,122
Unrealized Losses, Greater than 12 Months (10)
Total Fair Value 61,380
Total Unrealized Losses (163)
Asset-Backed Securities [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 35,138
Unrealized Losses, Less than 12 Months (111)
Fair Value, Greater than 12 Months 18,452
Unrealized Losses, Greater than 12 Months (461)
Total Fair Value 53,590
Total Unrealized Losses (572)
Sovereign Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 15,434
Unrealized Losses, Less than 12 Months (39)
Total Fair Value 15,434
Total Unrealized Losses (39)
Municipal Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 2,581
Unrealized Losses, Less than 12 Months (4)
Total Fair Value 2,581
Total Unrealized Losses (4)
Agency Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Fair Value, Less than 12 Months 1,499
Unrealized Losses, Less than 12 Months (1)
Total Fair Value 1,499
Total Unrealized Losses $ (1)