Income Taxes (Tables)

12 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of Income Before Income Taxes

(Loss) income before income taxes was as follows:

	Year Ended September 30,
	2021		2020		2019
Domestic	$	(129,814)	$	94,002	$	(45,364)
Foreign	75,020		79,345		108,470
Total	$	(54,794)	$	173,347	$	63,106

Taxes on Income

Taxes on income consisted of the following:

	Year Ended September 30,
	2021		2020		2019
U.S. federal and state:
Current	$	29,712	$	20,733	$	23,461
Deferred	(39,609)		(7,048)		(23,182)
Total	(9,897)		13,685		279
Foreign:
Current	25,417		21,053		27,580
Deferred	(1,737)		(4,219)		(3,968)
Total	23,680		16,834		23,612
Total U.S. and foreign	$	13,783	$	30,519	$	23,891

Income Tax Rate Reconciliation

The Provision for income taxes at our effective tax rate differed from the statutory rate as follows:

	Year Ended September 30,
	2021		2020		2019
Federal statutory rate	21.0	%	21.0	%	21.0	%
U.S. benefits from research and experimentation activities	3.4		(1.5)		(2.9)
State taxes, net of federal effect	1.2		1.1		(4.7)
Foreign income at other than U.S. rates	(11.6)		1.7		10.3
Excess compensation	(3.3)		0.4		6.4
Share-based compensation	7.4		(2.2)		(7.2)
U.S. tax reform	—		—		14.1
Global Intangible Low Taxed Income ("GILTI")	1.5		—		3.1
Foreign derived intangible income	14.4		(3.4)		(3.9)
Change in reserve positions	(11.1)		1.9		0.3
Goodwill impairment	(47.5)		—		—
Other, net	(0.6)		(1.4)		1.4
Provision for income taxes	(25.2)	%	17.6	%	37.9	%

Reconciliation of Gross Unrecognized Tax Benefits

The following table presents the changes in the balance of gross unrecognized tax benefits during the last three fiscal years:

Balance September 30, 2018	$	1,434
Additions for tax positions relating to the current fiscal year	271
Additions for tax positions relating to prior fiscal years	9,839
Balance September 30, 2019	11,544
Additions for tax positions relating to the current fiscal year	4,691
Additions for tax positions relating to prior fiscal years	140
Reduction for tax positions relating to prior fiscal years	(1,337)
Balance September 30, 2020	15,038
Additions for tax positions relating to the current fiscal year	5,288
Additions for tax positions relating to prior fiscal years	2,162
Reduction for tax positions relating to prior fiscal years	(113)
Balance September 30, 2021	$	22,375

Significant Components of Deferred Tax Assets and Liabilities

Significant components of net deferred tax assets and liabilities were as follows:

	September 30,
	2021		2020
Deferred tax assets:
Employee benefits	$	7,877	$	8,920
Inventory	6,469		4,657
Accrued expenses	3,121		2,615
Share-based compensation expense	5,686		5,709
Credit and other carryforwards	9,647		5,803
Lease obligations	6,858		—
Interest rate swap	3,732		8,506
Other	579		1,238
Valuation allowance	(2,880)		(2,948)
Total deferred tax assets	$	41,089	$	34,500
Deferred tax liabilities:
Depreciation and amortization	$	94,425	$	131,237
Lease right-of-use assets	6,689		—
Withholding on transition taxes	4,696		4,156
Other	3,396		3,606
Total deferred tax liabilities	$	109,206	$	138,999