XML 26 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
INVESTMENTS (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Held-to-maturity securities:    
Estimated Fair Value $ 1,547  
Total investments    
Amortized Cost 525,319 261,266
Gross Unrealized Gains 382 21,405
Gross Unrealized Losses, Less than One Year (94) (160)
Gross Unrealized Losses, Greater than One Year (35) (78)
Estimated Fair Value 525,572 282,433
Short-term investments
   
Available-for-sale securities:    
Amortized Cost 448,616 193,380
Gross Unrealized Gains 382 152
Gross Unrealized Losses, Less than One Year (32) (64)
Estimated Fair Value 448,966 193,468
Total investments    
Amortized Cost 449,817 194,581
Gross Unrealized Gains 382 152
Gross Unrealized Losses, Less than One Year (32) (64)
Estimated Fair Value 450,167 194,669
Short-term investments | Money market funds
   
Total investments    
Amortized Cost 1,201 1,201
Estimated Fair Value 1,201 1,201
Short-term investments | U.S. government and agency debt securities
   
Available-for-sale securities:    
Amortized Cost 223,404 130,669
Gross Unrealized Gains 192 80
Gross Unrealized Losses, Less than One Year   (1)
Estimated Fair Value 223,596 130,748
Short-term investments | Corporate debt securities
   
Available-for-sale securities:    
Amortized Cost 178,720 38,614
Gross Unrealized Gains 153 64
Gross Unrealized Losses, Less than One Year (30) (30)
Estimated Fair Value 178,843 38,648
Short-term investments | International government agency debt securities
   
Available-for-sale securities:    
Amortized Cost 46,492 24,097
Gross Unrealized Gains 37 8
Gross Unrealized Losses, Less than One Year (2) (33)
Estimated Fair Value 46,527 24,072
Long-term investments
   
Available-for-sale securities:    
Amortized Cost 73,955 65,192
Gross Unrealized Gains   21,253
Gross Unrealized Losses, Less than One Year (62) (96)
Gross Unrealized Losses, Greater than One Year (35) (78)
Estimated Fair Value 73,858 86,271
Held-to-maturity securities:    
Amortized Cost 75,502 66,685
Gross Unrealized Gains   21,253
Gross Unrealized Losses, Less than One Year (62) (96)
Gross Unrealized Losses, Greater than One Year (35) (78)
Estimated Fair Value 75,405 87,764
Long-term investments | Certificates of deposit
   
Held-to-maturity securities:    
Amortized Cost 1,547 1,493
Estimated Fair Value 1,547 1,493
Long-term investments | Equity securities
   
Available-for-sale securities:    
Amortized Cost   8,732
Gross Unrealized Gains   21,253
Estimated Fair Value   29,985
Long-term investments | U.S. government and agency debt securities
   
Available-for-sale securities:    
Amortized Cost 42,082 28,503
Gross Unrealized Losses, Less than One Year (43) (61)
Gross Unrealized Losses, Greater than One Year (13) (3)
Estimated Fair Value 42,026 28,439
Long-term investments | Corporate debt securities
   
Available-for-sale securities:    
Amortized Cost 25,793 20,266
Gross Unrealized Losses, Less than One Year (17) (30)
Gross Unrealized Losses, Greater than One Year (22) (75)
Estimated Fair Value 25,754 20,161
Long-term investments | International government agency debt securities
   
Available-for-sale securities:    
Amortized Cost 6,080 7,691
Gross Unrealized Losses, Less than One Year (2) (5)
Estimated Fair Value $ 6,078 $ 7,686