CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4,927)	$ 2,119,874	$ (16,162)	$ 2,163,193
Other comprehensive income (loss), net of tax:
Foreign currency translation reclassification adjustments included in income from discontinued operations		(16,567)		(16,567)
Net investment hedge currency translation adjustment, net of tax effects of ($4,531) and ($24,239) for the three and six months ended March 31, 2023 and net of tax effects of $3,524 for the three and six months ended March 31, 2022	(13,133)	7,149	(70,260)	7,149
Foreign currency translation adjustments	33,850	(18,907)	111,264	(14,980)
Changes in unrealized gain on marketable securities, net of tax effects of $858 and $1,395 for the three and six months ended March 31, 2023 and net of tax effects of ($874) and ($874) for the three months and six months ended March 31, 2022	2,487	(3,306)	4,042	(2,432)
Actuarial gains, net of tax effects of $0 and $0 during the three and six months ended March 31, 2023, $0 and $0 during the three and six months ended March 31, 2022		84		81
Total other comprehensive income (loss), net of tax	23,204	(31,547)	45,046	(26,749)
Comprehensive income (loss)	$ 18,277	$ 2,088,327	$ 28,884	$ 2,136,444