Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income (loss)	$ 165,970	$ (997,742)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75,617	116,117
Amortization of operating lease right-of-use assets	35,797	68,229
Loss on impairment of assets	68,429	782,526
(Gain) loss on sales and disposal of subsidiaries and property and equipment, net	(625,532)	524,956
Loss on derivative instruments	24,517	626
Payments for settlement of derivative contracts	0	(626)
Loss on debt extinguishment	77,999	0
Non-cash interest expense	6,129	14,075
Interest paid on deferred purchase price for acquisitions	0	(3,969)
Non-cash share-based compensation expense	7,175	10,277
Bad debt expense	17,672	97,662
Deferred income taxes	267,551	(264,381)
Unrealized foreign currency exchange gain	(11,240)	(15,355)
Non-cash loss from non-income tax contingencies	11,976	3,375
Other, net	(71)	1,917
Changes in operating assets and liabilities:
Receivables	(9,632)	(325,106)
Prepaid expenses and other assets	(20,021)	(47,616)
Accounts payable and accrued expenses	(47,175)	(50,545)
Income tax receivable/payable, net	63,151	(56,875)
Deferred revenue and other liabilities	(54,272)	364,210
Net cash provided by operating activities	54,040	221,755
Cash flows from investing activities
Purchase of property and equipment	(27,578)	(62,347)
Expenditures for deferred costs	(5,371)	(11,955)
Receipts from sales of discontinued operations, net of cash sold, and property and equipment	2,137,673	40,148
Payments on derivatives related to sale of discontinued operations	(50,341)	0
Payments to related parties	0	(3)
Net cash provided by (used in) investing activities	2,054,383	(34,157)
Cash flows from financing activities
Proceeds from issuance of long-term debt, net of original issue discount	46,493	566,726
Payments on long-term debt	(933,213)	(298,664)
Payments of deferred purchase price for acquisitions	0	(5,680)
Proceeds from exercise of stock options	1,160	26,697
Withholding of shares to satisfy tax withholding for vested stock awards and exercised stock options	(1,718)	(1,150)
Payments to repurchase common stock	(364,275)	(29,203)
Payments of call premiums and debt issuance costs	(32,980)	(726)
Distributions to noncontrolling interest holders	0	(609)
Net cash (used in) provided by financing activities	(1,284,533)	257,391
Effects of exchange rate changes on Cash and cash equivalents and Restricted cash	(14,360)	(13,448)
Change in cash included in current assets held for sale	285,027	218,298
Net change in Cash and cash equivalents and Restricted cash	1,094,557	649,839
Cash and cash equivalents and Restricted cash at beginning of period	867,298	97,817
Cash and cash equivalents and Restricted cash at end of period	$ 1,961,855	$ 747,656