CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Current assets
Cash and cash equivalents	$ 353,491	$ 678,910
Short-term marketable securities	468,220	338,873
Accounts receivable, net of allowance for expected credit losses ($6,844 and $8,057, respectively)	154,668	156,535
Inventories	122,351	128,198
Derivative asset	350	13,036
Short-term restricted cash	3,089	4,650
Prepaid expenses and other current assets	87,897	98,754
Total current assets	1,190,066	1,418,956
Property, plant and equipment, net	200,905	205,744
Long-term marketable securities	143,018	111,338
Long-term deferred tax assets	925	571
Operating lease right-of-use assets	69,662	66,580
Goodwill	681,140	784,339
Intangible assets, net	267,626	294,301
Other assets	10,155	3,891
Total assets	2,563,497	2,885,720
Current liabilities
Accounts payable	37,319	35,796
Deferred revenue	38,323	34,614
Accrued warranty and retrofit costs	9,745	10,223
Accrued compensation and benefits	27,985	33,911
Accrued customer deposits	21,772	17,707
Accrued income taxes payable	10,706	7,378
Short-term operating lease liability	10,802	9,499
Accrued expenses and other current liabilities	46,347	61,800
Total current liabilities	202,999	210,928
Long-term tax accruals	377	380
Long-term deferred tax liabilities	62,267	67,301
Long-term operating lease liabilities	63,374	60,436
Other long-term liabilities	11,609	12,175
Total liabilities	340,626	351,220
Stockholders' equity
Preferred stock, $0.01 par value - 1,000,000 shares authorized, no shares issued or outstanding
Common stock, $0.01 par value - 125,000,000 shares authorized, 68,464,925 shares issued and 54,614,041 shares outstanding at March 31, 2024, 71,294,247 shares issued and 57,832,378 shares outstanding at September 30, 2023	681	713
Additional paid-in capital	999,333	1,156,160
Accumulated other comprehensive loss	(41,728)	(62,426)
Treasury stock, at cost - 13,850,884 shares at March 31, 2024 and 13,461,869 shares at September 30, 2023	(223,820)	(200,956)
Retained earnings	1,488,405	1,641,009
Total stockholders' equity	2,222,871	2,534,500
Total liabilities and stockholders' equity	$ 2,563,497	$ 2,885,720