Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income

The following is a summary of the components of accumulated other comprehensive income, net of tax, at September 30, 2021, 2020 and 2019 (in thousands):

			Unrealized
			Gains (Losses)
	Currency		on Available-		Pension
	Translation		for-Sale		Liability
	Adjustments		Securities		Adjustments		Total
Balance at September 30, 2018	$	13,517	$	(112)	$	182	$	13,587
Other comprehensive income (loss) before reclassifications		(9,333)		244		(882)		(9,971)
Amounts reclassified from accumulated other comprehensive income		—		(140)		35		(105)
Balance at September 30, 2019		4,184		(8)		(665)		3,511
Other comprehensive income (loss) before reclassifications		18,877		5		(503)		18,379
Amounts reclassified from accumulated other comprehensive income		—		2		27		29
Balance at September 30, 2020		23,061		(1)		(1,141)		21,919
Other comprehensive income (loss) before reclassifications		(2,922)		—		333		(2,589)
Amounts reclassified from accumulated other comprehensive income		—		—		21		21
Balance at September 30, 2021	$	20,139	$	(1)	$	(787)	$	19,351