XML 92 R51.htm IDEA: XBRL DOCUMENT v3.19.2
Investments - Amortized Cost and Fair Value of the Held-to-Maturity Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Jul. 27, 2019
Apr. 30, 2019
Amortized cost of held-to-maturity securities by contractual maturity    
Due within one year $ 163,634  
Due after one year through five years 2,194  
Total 165,828 $ 159,873
Fair value of held-to-maturity securities by contractual maturity    
Due within one year 163,792  
Due after one year through five years 2,193  
Fair Value $ 165,985 $ 159,915