Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 40,832	$ 2,999
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	61,027	56,907
Non-cash interest expense, net	13,202	13,586
Non-cash change in fair-value	(5,501)	710
Gain on asset acquisition	0	(22,690)
Change in deferred revenue	53,066	875
Loss on extinguishment of debt	0	5,488
Deferred income taxes	(5,518)	(8,014)
Share-based compensation	7,899	6,017
Impairment of long-term investment	0	3,312
Other	(63)	742
(Increase) decrease in assets:
Receivables	(10)	11,659
Deferred charges and other assets	(26,745)	(2,181)
Increase (decrease) in liabilities:
Accounts payable	(1,675)	(2,547)
Accrued compensation and other expenses	7,628	6,428
Accrued taxes payable and other tax contingencies	70	(1,315)
Net cash provided by operating activities	144,212	71,976
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(187,707)	(92,270)
Sales of short-term investments	195,072	355,649
Purchases of property and equipment	(9,875)	(3,062)
Proceeds from sale of business	0	10,000
Capitalized patent costs	(23,726)	(26,123)
Net proceeds from change in long-term investments	4,260	0
Net cash provided by (used in) investing activities	(21,976)	244,194
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from exercise of stock options	1,792	2
Payments on long-term debt	(94,909)	(221,091)
Proceeds from issuance of convertible senior notes	0	400,000
Purchase of convertible bond hedge	0	(72,000)
Payment for warrant unwind	0	(4,184)
Prepayment penalty on long-term debt	0	(10,763)
Proceeds from hedge unwind	0	9,038
Proceeds from issuance of warrants	0	47,600
Payments of debt issuance costs	0	(8,375)
Repurchase of common stock	(349)	(171,269)
Proceeds from non-controlling interests	0	10,333
Taxes withheld upon restricted stock unit vestings	(1,535)	(4,316)
Proceeds from non-controlling interests	(32,290)	(33,683)
Net cash used in financing activities	(127,291)	(58,708)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(5,055)	257,462
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	757,098	488,733
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	$ 752,043	$ 746,195