Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

Our significant financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2016 and September 30, 2016 were as follows:

	December 31, 2016
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Cash equivalents	$	60,418	$	—	$	—	$	60,418
Marketable securities
Certificates of deposit	—		880		—		880
Commercial paper	—		11,964		—		11,964
Corporate notes/bonds	34,599		—		—		34,599
U.S. government agency securities	—		2,391		—		2,391
Forward contracts	—		4,505		—		4,505
	$	95,017	$	19,740	$	—	$	114,757
Financial liabilities:
Contingent consideration related to acquisitions	$	—	$	—	$	16,594	$	16,594
Forward contracts	—		629		—		629
	$	—	$	629	$	16,594	$	17,223

	September 30, 2016
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Cash equivalents	$	60,139	$	—	$	—	$	60,139
Marketable securities
Certificates of deposit	—		681		—		681
Commercial paper	—		11,925		—		11,925
Corporate notes/bonds	34,601		—		—		34,601
U.S. government agency securities	—		2,409		—		2,409
Forward contracts			260		—		260
	$	94,740	$	15,275	$	—	$	110,015
Financial liabilities:
Contingent consideration related to acquisitions	$	—	$	—	$	19,570	$	19,570
Forward contracts	—		3,170		—		3,170
	$	—	$	3,170	$	19,570	$	22,740

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Changes in the fair value of Level 3 contingent consideration liability associated with our acquisitions of ColdLight and Kepware were as follows:

	Contingent Consideration
	(in thousands)
	ColdLight			Kepware			Total
Balance, October 1, 2016	$	2,500		$	17,070		19,570
Change in present value of contingent consideration	—			74			74
Payment of contingent consideration	(1,250		)	(1,800		)	(3,050		)
Balance, December 31, 2016	$	1,250		$	15,344		$	16,594