Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents, including restricted cash of $1,907 and $3,497, respectively	$ 362,007	$ 153,270
Accounts receivable, less allowance for uncollectible amounts of $3,831 and $8,359, respectively	571,943	537,987
Inventories	427,492	437,943
Income taxes receivable	31,329	28,879
Other current assets	50,757	52,786
Total current assets	1,443,528	1,210,865
Property, plant and equipment, net	952,800	997,415
Goodwill	812,516	808,252
Intangible assets, net	582,213	606,711
Deferred income tax assets	14,582	14,658
Other assets	283,016	265,435
Total assets	4,088,655	3,903,336
Current liabilities:
Current portion of long-term debt	1,050	101,634
Accounts payable	163,248	134,242
Income taxes payable	12,699	4,662
Accrued liabilities	163,580	151,794
Total current liabilities	340,577	392,332
Long-term debt, less current portion	739,062	736,849
Deferred income tax liabilities	165,652	163,573
Other liabilities	641,677	617,905
Total liabilities	1,886,968	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	259,424	231,936
Accumulated other comprehensive losses	(79,966)	(89,794)
Deferred compensation	8,150	9,222
Retained earnings	2,560,915	2,427,905
Stockholders' equity	2,748,629	2,579,375
Treasury stock at cost, 9,361 shares and 10,277 shares, respectively	(538,792)	(577,476)
Treasury stock held for deferred compensation, at cost, 173 shares and 199 shares, respectively	(8,150)	(9,222)
Total stockholders' equity	2,201,687	1,992,677
Total liabilities and stockholders' equity	$ 4,088,655	$ 3,903,336