Financial Instruments and Hedging Activities (Tables)

6 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Quantitative Summary of Fair Value of Derivative Instruments

A summary of the derivative instruments is as follows (dollars in thousands):

Derivatives Not Designated as Hedges	Balance Sheet Classification	Fair Value
		March 31, 2019			September 30, 2018
Foreign currency forward contracts	Prepaid expenses and other current assets	$	689		$	143
Foreign currency forward contracts	Accrued expenses and other current liabilities	(350		)	(1,192		)

Summarized Activity of Derivative Instruments

A summary of income (loss) related to the derivative instruments for the three and six months endedMarch 31, 2019 and 2018 is as follows (dollars in thousands):

	Income Statement Classification	Three Months Ended March 31,					Six Months Ended March 31,
Derivatives Not Designated as Hedges	Income (loss) recognized	2019		2018			2019		2018
Foreign currency forward contracts	Other income (expense), net	$	2,170	$	(785	)	$	440	$	(1,182	)