Fair Value Measures (Tables)

6 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis at March 31, 2020 and September 30, 2019 consisted of the following (dollars in thousands):

	March 31, 2020
	Level 1		Level 2			Level 3			Total
Assets:
Money market funds (a)	$	260,701	$	—		$	—		$	260,701
Time deposits (b)	—		146,864			—			146,864
Commercial paper, $33,207 at cost (b)	—		33,380			—			33,380
Corporate notes and bonds, $23,605 at cost (b)	—		23,403			—			23,403
Foreign currency exchange contracts (b)	—		—			—			—
Total assets at fair value	$	260,701	$	203,647		$	—		$	464,348
Liabilities:
Foreign currency exchange contracts (b)	$	—	(297		)	$	—		$	(297	)
Contingent acquisition payments (c)	—		—			(2,493		)	(2,493		)
Total liabilities at fair value	$	—	$	(297	)	$	(2,493	)	$	(2,790	)

	September 30, 2019
	Level 1		Level 2			Level 3			Total
Assets:
Money market funds (a)	$	217,861	$	—		$	—		$	217,861
Time deposits (b)	—		115,913			—			115,913
Commercial paper, $77,089 at cost (b)	—		77,494			—			77,494
Corporate notes and bonds, $37,504 at cost (b)	—		37,566			—			37,566
Foreign currency exchange contracts (b)	—		597			—			597
Total assets at fair value	$	217,861	$	231,570		$	—		$	449,431
Liabilities:
Foreign currency exchange contracts (b)	$	—	$	(327	)	$	—		$	(327	)
Contingent acquisition payments (c)	—		—			(2,925		)	(2,925		)
Total liabilities at fair value	$	—	$	(327	)	$	(2,925	)	$	(3,252	)

Changes in Fair Value of Contingent Earn-Out Liabilities

The following table provides a summary of changes in the aggregate fair value of the contingent acquisition payments for all periods presented (dollars in thousands):

	Three Months Ended March 31,					Six Months Ended March 31,
	2020		2019			2020			2019
Balance at beginning of period	$	2,493	$	3,979		$	2,550		$	4,000
Earn-out liabilities established at time of acquisition	—		—			—			—
Payments and foreign currency translation	—		(2,529		)	(57		)	(2,550		)
Adjustments to fair value included in acquisition-related costs, net	—		—			—			—
Balance at end of period	$	2,493	$	1,450		$	2,493		$	1,450