CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Sep. 30, 2022
Current assets
Cash and cash equivalents	$ 608,304	$ 658,274
Short-term marketable securities	522,897	911,764
Accounts receivable, net of allowance for expected credit losses ($6,942 and $5,162, respectively)	201,920	163,758
Inventories	145,939	85,544
Derivative asset	47,953	124,789
Short-term restricted cash	7,070	382,596
Prepaid expenses and other current assets	85,901	132,621
Total current assets	1,619,984	2,459,346
Property, plant and equipment, net	217,271	154,470
Long-term marketable securities	304,675	352,020
Long-term deferred tax assets	298	1,169
Goodwill	761,153	513,623
Intangible assets, net	327,106	178,401
Other assets	61,929	57,093
Total assets	3,292,416	3,716,122
Current liabilities
Accounts payable	55,259	38,654
Deferred revenue	42,641	39,748
Accrued warranty and retrofit costs	5,179	2,890
Accrued compensation and benefits	34,524	41,898
Accrued income taxes payable	24,529	28,419
Accrued expenses and other current liabilities	86,894	78,937
Total current liabilities	249,026	230,546
Long-term tax reserves	1,696	1,684
Long-term deferred tax liabilities	85,886	64,555
Long-term pension liabilities	278	261
Long-term operating lease liabilities	52,494	49,227
Contingent consideration liability	18,462
Other long-term liabilities	13,185	6,463
Total liabilities	421,027	352,736
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, 82,515,917 shares issued and 69,054,048 shares outstanding at December 31, 2022, 88,482,125 shares issued and 75,020,256 shares outstanding at September 30, 2022	824	885
Additional paid-in capital	1,489,554	1,992,017
Accumulated other comprehensive loss	(62,074)	(83,916)
Treasury stock, at cost - 13,461,869 shares at December 31, 2022 and September 30, 2022	(200,956)	(200,956)
Retained earnings	1,644,041	1,655,356
Total stockholders' equity	2,871,389	3,363,386
Total liabilities and stockholders' equity	$ 3,292,416	$ 3,716,122