v3.8.0.1
Available-for-Sale Securities Based on Stated Effective Maturities (Detail) - USD ($)
$ in Thousands
Dec. 29, 2017
Jun. 30, 2017
Investments Classified by Contractual Maturity Date [Line Items]    
Total $ 149,403 $ 151,450
Carrying Cost    
Investments Classified by Contractual Maturity Date [Line Items]    
Due within one year 16,814  
Due between one to three years 129,579  
Due after three years 3,515  
Total 149,908  
Fair Value    
Investments Classified by Contractual Maturity Date [Line Items]    
Due within one year 16,808  
Due between one to three years 129,095  
Due after three years 3,500  
Total $ 149,403