Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Current assets:
Cash and cash equivalents	$ 126,259	$ 120,817
Trade receivables, net of allowances	152,745	90,159
Inventories	251,025	299,905
Prepaid expenses	16,747	17,212
Other current assets	21,822	2,501
Total current assets	568,598	530,594
Property, plant and equipment - net	507,198	517,913
Goodwill	994,155	993,995
Intangible assets - net	222,378	245,835
Other assets	91,649	94,754
Total assets	2,383,978	2,383,091
Current liabilities:
Accounts payable	51,921	48,987
Accrued rebates	65,074	50,479
Accrued interest	58	4,436
Current portion of long-term debt obligations	6,000	6,000
Accrued expenses and other liabilities	69,452	72,589
Total current liabilities	192,505	182,491
Deferred income taxes	64,423	65,195
Long-term debt—less current portion	582,572	584,879
Other non-current liabilities	109,405	106,083
Total liabilities	948,905	938,648
Commitments and contingencies (See Note 17)
Stockholders' equity:
Preferred stock, $0.001 par value; 1,000,000 shares authorized and no shares issued or outstanding at December 31, 2022 and September 30, 2022, respectively
Additional paid‑in capital	1,641,321	1,630,378
Accumulated deficit	(122,565)	(113,002)
Accumulated other comprehensive income (loss)	(3,262)
Treasury stock, at cost, 4,469,330 and 4,116,570 shares at December 31, 2022 and September 30, 2022, respectively	(80,576)	(73,088)
Total stockholders' equity	1,435,073	1,444,443
Total liabilities and stockholders' equity	2,383,978	2,383,091
Common Class A [Member]
Stockholders' equity:
Common stock	$ 155	$ 155