Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Contractual Maturities (Details)

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Marketable Securities - Contractual Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Amortized Cost    
Due within one year $ 386,442  
Due after one year through three years 350,372  
Marketable securities, Amortized Cost 736,814 $ 724,449
Fair Value    
Due within one year 386,617  
Due after one year through three years 351,041  
Marketable securities, Fair value $ 737,658 $ 723,391