v2.4.0.8
Short-Term And Long-Term Investments And Restricted Deposits (Contractual Maturities Of Short-Term And Long-Term Investments And Restricted Deposits) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Investments [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
One year or less, Amortized Cost $ 166,251 $ 101,537
One year through five years, Amortized Cost 953,321 609,755
Five years through ten years, Amortized Cost 123,875 157,003
Greater than ten years, Amortized Cost 31,874 29,900
Total, Amortized Cost 1,275,321 898,195
One year or less, Fair Value 166,993 102,126
One year through five years, Fair Value 952,591 610,589
Five years through ten years, Fair Value 123,175 151,221
Greater than ten years, Fair Value 32,495 30,090
Total, Fair Value 1,275,254 894,026
Restricted Deposits [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
One year or less, Amortized Cost 91,716 40,633
One year through five years, Amortized Cost 7,999 6,301
Five years through ten years, Amortized Cost 0 0
Greater than ten years, Amortized Cost 0 0
Total, Amortized Cost 99,715 46,934
One year or less, Fair Value 91,731 40,637
One year through five years, Fair Value 7,996 6,309
Five years through ten years, Fair Value 0 0
Greater than ten years, Fair Value 0 0
Total, Fair Value $ 99,727 $ 46,946