XML 46 R36.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investments - Amortized Cost and Fair Value of the Held-to-Maturity Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Oct. 28, 2017
Apr. 30, 2017
Amortized cost of held-to-maturity securities by contractual maturity    
Due within one year $ 110,751  
Due after one year through five years 30,928  
Total 141,679 $ 159,570
Fair value of held-to-maturity securities by contractual maturity    
Due within one year 110,660  
Due after one year through five years 30,859  
Fair Value $ 141,519 $ 159,465