XML 15 R39.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments - Fair Value of Long-Term Available-for-Sale Investments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments $ 134,749 $ 60,405
Time Deposits and Certificates of Deposit [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments 50 54
Asset Backed Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments 63,986  
Corporate Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments 61,446  
Municipal Bonds [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments 1,257  
U.S. Agency Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Fair value of long-term available-for-sale investments $ 8,010 $ 60,351