Income Taxes (Tables)

12 Months Ended

Sep. 30, 2022

Income Tax Disclosure [Abstract]

Components of Income Tax Provision (Benefit)

	Year Ended September 30,
	2022		2021		2020
Current income tax provision (benefit):
Federal	$	(4,826)	$	(14,247)	$	661
State		607		(867)		375
Foreign		4,627		15,484		3,721
Total current income tax provision		408		370		4,757
Deferred income tax provision (benefit):
Federal		(815)		(11,469)		(11,833)
State		(180)		(2,283)		(1,976)
Foreign		1,937		(6,718)		(4,878)
Total deferred income tax provision (benefit)		942		(20,470)		(18,687)
Income tax provision (benefit)	$	1,350	$	(20,100)	$	(13,930)

Components of Income (Loss) Before Income Taxes and Equity in Earnings of Joint Ventures

	Year Ended September 30,
	2022		2021		2020
Domestic	$	(39,392)	$	(88,763)	$	(48,932)
Foreign		29,456		39,794		8,640
Income before income taxes	$	(9,936)	$	(48,969)	$	(40,292)

Differences between Income Tax Provision (benefit) and Income Taxes Computed using Applicable U.S. Statutory Federal Tax Rate

	Year Ended September 30,
	2022		2021		2020
Income tax benefit computed at federal statutory rate	$	(2,086)	$	(10,284)	$	(8,461)
State income taxes, net of federal benefit		(776)		(1,005)		(1,557)
Foreign income taxed at different rates		(1,182)		(2,594)		(1,786)
Impact of investments in subsidiaries		—		7,128		289
Change in deferred tax asset valuation allowance		1,337		(3,247)		(2,514)
Impact of change in uncertain tax positions		(358)		(10,607)		1,144
Global intangible low taxed income, net of foreign tax credits		4,060		4,051		2,815
Impact of tax rate changes		1,531		165		(185)
Compensation		(1,199)		462		(2,302)
Tax credits		(2,102)		(4,050)		(676)
Merger costs		1,629		20		37
Other non-deductible expenses		717		468		398
Other true-ups		763		—		(520)
Research and development expense deduction		(910)		(730)		(547)
Other		(74)		123		(65)
Income tax provision (benefit)	$	1,350	$	(20,100)	$	(13,930)

Significant Components of Net Deferred Tax Assets and Liabilities

	September 30,
	2022		2021
Accruals and reserves not currently deductible	$	9,704	$	17,272
Federal, state and foreign tax credits		—		4,350
Other assets		14		502
Equity compensation		3,508		5,872
Net operating loss carryforwards		7,397		9,693
Lease liabilities		14,700		12,958
Mergers and acquisitions		—		7,239
Deferred revenue		3,609		3,258
Inventory reserves and valuation		1,081		6,946
Deferred tax assets		40,013		68,090
Depreciation and intangible amortization		(56,856)		(50,181)
Right-of-use assets		(14,146)		(12,683)
Other liabilities		(402)		(1,883)
Net unrealized loss		(27,144)		—
Deferred tax liabilities		(98,548)		(64,747)
Valuation allowance		(5,927)		(8,592)
Net deferred tax asset (liability)	$	(64,462)	$	(5,249)

Reconciliation of Beginning and Ending Amount of Consolidated Liability for Unrecognized Income Tax Benefits

	Total
Balance at September 30, 2019	$	16,860
Additions for tax positions in current year		448
Reductions from lapses in statutes of limitations		(586)
Balance at September 30, 2020		16,722
Reductions from lapses in statutes of limitations		(14,716)
Balance at September 30, 2021		2,006
Reductions from lapses in statutes of limitations		(327)
Balance at September 30, 2022	$	1,679