Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 98,316	$ 194,265
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,161	47,644
Amortization of operating lease right-of-use assets	23,257	33,374
Loss on impairment of assets	3,768	0
Loss (gain) on sales of subsidiaries and disposal of property and equipment, net	21,175	(246,803)
Gain on derivative instruments	(802)	(5,343)
Payments for settlement of derivative contracts	0	(8,233)
Loss on debt extinguishment	0	10,622
Non-cash interest expense	5,091	5,076
Non-cash share-based compensation expense	1,984	3,149
Bad debt expense	22,912	23,650
Deferred income taxes	(248,701)	8,835
Unrealized foreign currency exchange (gain) loss	(29,720)	5,458
Non-cash loss from non-income tax contingencies	6,514	4,561
Other, net	3,982	1,537
Changes in operating assets and liabilities:
Receivables	(173,760)	(264,944)
Prepaid expenses and other assets	(32,084)	(62,433)
Accounts payable and accrued expenses	(64,924)	(47,929)
Income tax receivable/payable, net	2,709	(45,012)
Deferred revenue and other liabilities	312,593	387,500
Net cash (used in) provided by operating activities	(3,529)	44,974
Cash flows from investing activities
Purchase of property and equipment	(24,582)	(32,319)
Expenditures for deferred costs	(3,500)	(3,488)
Receipts from sales of discontinued operations, net of cash sold, and property and equipment	4,032	330,998
Business acquisitions, net of cash acquired	0	(1,194)
Payments from related parties	87	87
Net cash (used in) provided by investing activities	(23,963)	294,084
Cash flows from financing activities
Proceeds from issuance of long-term debt, net of original issue discount	499,479	90,630
Payments on long-term debt	(226,505)	(532,592)
Payments of deferred purchase price for acquisitions	(1,488)	(369)
Proceeds from exercise of stock options	26,754	0
Payments to repurchase common stock	(29,203)	0
Withholding of shares to satisfy tax withholding for vested stock awards and exercised stock options	(1,140)	(1,420)
Payments of debt issuance costs	0	(5,226)
Payments to purchase noncontrolling interests	0	(625)
Net cash provided by (used in) financing activities	267,897	(449,602)
Effects of exchange rate changes on Cash and cash equivalents and Restricted cash	(33,613)	2,042
Change in cash included in current assets held for sale	9,718	(2,825)
Net change in Cash and cash equivalents and Restricted cash	216,510	(111,327)
Cash and cash equivalents and Restricted cash at beginning of period	526,550	583,572
Cash and cash equivalents and Restricted cash at end of period	$ 743,060	$ 472,245