CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 41,367	$ (14,516)
Depreciation	19,150	26,368
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of Intangible Assets	37,613	41,703
Stock-based compensation	64,895	54,295
Non-cash interest expense	25,318	24,686
Deferred tax benefit	(39,255)	(11,642)
Loss on extinguishment of debt	18,656	910
Other	1,576	805
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	19,934	19,773
Prepaid expenses and other assets	6,358	(14,698)
Accounts payable	(6,219)	2,584
Accrued expenses and other liabilities	(61,686)	(7,081)
Deferred revenue	27,031	28,951
Net Cash Provided by (Used in) Continuing Operations	154,738	152,138
Cash Provided by (Used in) Operating Activities, Discontinued Operations	(13,307)	51,418
Net cash provided by operating activities	141,431	203,556
Proceeds from Divestiture of Businesses	0	404,045
Cash flows from investing activities:
Capital expenditures	(31,187)	(23,434)
Proceeds from Equity Method Investment, Distribution, Return of Capital	139,090	0
Purchases of marketable securities and other investments	(148,880)	(119,165)
Proceeds from sales and maturities of marketable securities and other investments	224,987	117,661
Gain (Loss) on Hedging Activity	1,332	(2,553)
Net cash provided by investing activities	46,252	376,554
Cash flows from financing activities:
Repurchase and redemption of debt	(513,642)	(300,000)
Payments for repurchase of common stock	(169,218)	(91,321)
Proceeds from issuance of common stock from employee stock plans	7,204	8,643
Proceeds from Lines of Credit	230,000	0
Payments for taxes related to net share settlement of equity awards	(36,488)	(38,191)
Other financing activities	(2,834)	(1,210)
Net cash used in financing activities	(345,888)	(422,079)
Effects of exchange rate changes on cash and cash equivalents	(4,849)	782
Net (decrease) increase in cash and cash equivalents	(163,054)	158,813
Cash and cash equivalents at beginning of period	560,961	315,963
Cash and cash equivalents at end of period	$ 397,907	$ 474,776