Income Taxes (Tables)

12 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of components of income tax expense (benefit)

The Company's expense (benefit) from income taxes from continuing operations consists of the following for the periods presented:

	Fiscal Year Ended September 30,
in thousands	2021		2020		2019
Current federal (a)	$	—	$	(4,641)	$	(4,935)
Current state	1,126		485		693
Deferred federal	20,331		20,639		(31,291)
Deferred state	89		1,490		(1,684)
Total expense (benefit)	$	21,546	$	17,973	$	(37,217)

(a) Fiscal 2020 federal current benefit is primarily driven by the expected refund of our remaining alternative minimum tax credit balance due to the enactment of the CARES Act. Fiscal 2019 federal current benefit is primarily driven by the expected refund of half of our outstanding alternative minimum tax credit that became refundable due to the enactment of the Tax Cuts and Jobs Act. See Note 2 for further discussion.

Schedule of effective income tax rate reconciliation

The expense from income taxes from continuing operations differs from the amount computed by applying the federal income tax statutory rate as follows for the periods presented:

	Fiscal Year Ended September 30,
in thousands	2021		2020		2019
Income tax computed at statutory rate	$	30,182	$	14,971	$	(24,494)
State income taxes, net of federal benefit	1,564		1,300		(590)
Deferred rate change	(904)		260		(88)
Changes in uncertain tax positions	—		(2)		(7)
Permanent differences	2,433		2,177		2,908
Tax credits	(12,088)		(939)		(14,902)
Other, net	359		206		(44)
Total expense (benefit)	$	21,546	$	17,973	$	(37,217)

Schedule of deferred tax assets and liabilities

The tax effects of significant temporary differences that give rise to the net deferred tax assets are as follows as of September 30, 2021 and September 30, 2020:

in thousands	September 30, 2021		September 30, 2020
Deferred tax assets:
Federal and state net operating loss carryforwards	$	177,611	$	192,981
Inventory adjustments	25,174		34,971
Incentive compensation	13,793		13,116
Intangible assets	6,016		13,993
Warranty and other reserves	6,006		5,503
Property, equipment and other assets	2,085		2,197
Uncertain tax positions	705		723
Other	2,435		844
Total deferred tax assets	233,825		264,328
Valuation allowance	(29,059)		(39,185)
Deferred tax assets, net	$	204,766	$	225,143

Schedule of unrecognized tax benefits roll forward

A reconciliation of our unrecognized tax benefits is as follows for the beginning and end of each period presented:

	Fiscal Year Ended September 30,
in thousands	2021		2020		2019
Balance at beginning of year	$	3,441	$	3,473	$	3,494
Additions for tax positions related to current year	—		—		—
Additions for tax positions related to prior years	—		—		—
Reductions in tax positions of prior years	—		—		—
Lapse of statute of limitations	(83)		(32)		(21)
Balance at end of year	$	3,358	$	3,441	$	3,473