Marketable Securities (Details) $ in Thousands |
9 Months Ended | |
---|---|---|
Jun. 30, 2017
USD ($)
Security
|
Jun. 30, 2016
USD ($)
|
|
Schedule of Available-for-sale Securities [Line Items] | ||
Number of securities below amortized cost basis | 7 | |
Number of securities | 34 | |
Proceeds from maturities and sales of marketable securities | $ | $ 76,149 | $ 46,664 |
Current Assets | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Available-for-sale securities, next twelve months, maximum year mature | 1 year | |
Non-current Assets | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Available-for-sale securities, year two through five, maximum year mature | 2 years |