Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Schedule of Notional Amount (Details)

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Derivative Instruments and Hedging Activities - Schedule of Notional Amount (Details) - Derivatives Designated as Hedging Instruments - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Purchase | Other foreign currency hedge contracts    
Derivative    
Derivative, notional amount $ 182,026 $ 130,442
Purchase | Cash flow hedge contracts- foreign currency    
Derivative    
Derivative, notional amount 6,073 8,116
Sell | Other foreign currency hedge contracts    
Derivative    
Derivative, notional amount 169,899 154,442
Sell | Cash flow hedge contracts- foreign currency    
Derivative    
Derivative, notional amount $ 90,410 $ 115,032
Maximum    
Derivative    
Remaining maturity 7 months 10 months