XML 65 R51.htm IDEA: XBRL DOCUMENT v3.19.2
Cash, Cash Equivalents and Short-Term Investments (Details 2)
$ in Thousands
May 31, 2019
USD ($)
Amortized cost of short-term fixed income securities  
Due within one year, Amortized Cost $ 612,044
Due between one and two years, Amortized Cost 587,933
Due between two and three years, Amortized Cost 136,276
Due after three years, Amortized Cost 62,634
Total, Amortized Cost 1,398,887
Estimated fair value of short-term fixed income securities  
Due within one year, Estimated Fair value 610,831
Due between one and two years, Estimated Fair value 586,542
Due between two and three years, Estimated Fair value 136,058
Due after three years, Estimated Fair value 62,638
Total, Estimated Fair value $ 1,396,069