Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents, including restricted cash of $1,907 and $3,497, respectively	$ 448,462	$ 153,270
Accounts receivable, less allowance for uncollectible amounts of $3,664 and $8,359, respectively	523,051	537,987
Inventories	419,971	437,943
Income taxes receivable	12,071	28,879
Other current assets	61,168	52,786
Total current assets	1,464,723	1,210,865
Property, plant and equipment, net	950,569	997,415
Goodwill	805,333	808,252
Intangible assets, net	559,289	606,711
Deferred income tax assets	14,066	14,658
Other assets	297,024	265,435
Total assets	4,091,004	3,903,336
Current liabilities:
Current portion of long-term debt	728	101,634
Accounts payable	170,909	134,242
Income taxes payable	11,481	4,662
Accrued liabilities	183,139	151,794
Total current liabilities	366,257	392,332
Long-term debt, less current portion	734,122	736,849
Deferred income tax liabilities	157,936	163,573
Other liabilities	617,908	617,905
Total liabilities	1,876,223	1,910,659
Commitments and contingencies (Note 22)
Stockholders' equity:
Preferred stock, par value $0.003 per share, 10,000 shares authorized, no shares issued
Common stock, par value $0.001455 per share, 150,000 shares authorized, 72,960 shares issued	106	106
Additional paid-in capital	261,735	231,936
Accumulated other comprehensive losses	(65,619)	(89,794)
Deferred compensation	7,949	9,222
Retained earnings	2,600,513	2,427,905
Stockholders' equity	2,804,684	2,579,375
Treasury stock at cost, 9,702 shares and 10,277 shares, respectively	(581,954)	(577,476)
Treasury stock held for deferred compensation, at cost, 167 shares and 199 shares, respectively	(7,949)	(9,222)
Total stockholders' equity	2,214,781	1,992,677
Total liabilities and stockholders' equity	$ 4,091,004	$ 3,903,336